Grinnell Weather

Daily / Monthly Weather History From This Station

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September 2021 August 2021 July 2021 June 2021 May 2021 April 2021 March 2021 February 2021 January 2021 December 2020 November 2020 October 2020 September 2020 August 2020 July 2020 June 2020 May 2020 April 2020 March 2020 February 2020 January 2020 December 2019 November 2019 October 2019 September 2019 August 2019 July 2019 June 2019 May 2019 April 2019 March 2019 February 2019 January 2019 December 2018 November 2018 October 2018 September 2018 August 2018 July 2018 June 2018 May 2018 April 2018 March 2018 February 2018 January 2018 December 2017 November 2017 October 2017 September 2017 August 2017 July 2017 June 2017 May 2017 April 2017 March 2017 February 2017 January 2017 December 2016 November 2016 October 2016 September 2016 August 2016 July 2016 June 2016 May 2016 April 2016 March 2016 February 2016 January 2016 December 2015 November 2015 October 2015 September 2015 August 2015 July 2015 June 2015 May 2015 April 2015 March 2015 February 2015 January 2015 December 2014 November 2014 October 2014 September 2014 August 2014 July 2014 June 2014 May 2014 April 2014 March 2014 February 2014 January 2014 December 2013 November 2013 October 2013 September 2013 August 2013 July 2013 June 2013 May 2013 April 2013 March 2013 February 2013 January 2013 December 2012 November 2012 October 2012 September 2012 August 2012 July 2012 June 2012 May 2012 April 2012 March 2012 February 2012 January 2012 December 2011 November 2011 October 2011 September 2011 August 2011 July 2011 June 2011 May 2011 April 2011 March 2011 February 2011 January 2011 December 2010 November 2010 October 2010 September 2010 August 2010 July 2010 June 2010 May 2010 April 2010 March 2010

Daily Report for the month of September 2021

1 September Average and Extremes
Average temperature	66.8°F
Average humidity	81%
Average dewpoint	60.4°F
Average barometer	30.0 in.
Average windspeed	4.3 mph
Average gustspeed	6.0 mph
Average direction	61° (ENE)
Rainfall for month	0.00 in.
Rainfall for year	20.00 in.
Maximum rain per minute	0.00 in. on 01 at 00:00
Maximum temperature	78.0°F on 01 at 15:58
Minimum temperature	57.6°F on 01 at 05:02
Maximum humidity	98% on 01 at 04:23
Minimum humidity	57% on 01 at 16:43
Maximum pressure	30.050 in. on 01 at 23:37
Minimum pressure	29.923 in. on 01 at 02:54
Maximum windspeed	12.7 mph on 01 at 12:35
Maximum gust speed	19.6 mph from 083 °(E) on 01 at 14:28
Maximum heat index	79.6°F on 01 at 15:58

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2 September Average and Extremes
Average temperature	65.4°F
Average humidity	81%
Average dewpoint	58.9°F
Average barometer	30.1 in.
Average windspeed	1.7 mph
Average gustspeed	3.8 mph
Average direction	87° (E)
Rainfall for month	0.00 in.
Rainfall for year	20.00 in.
Maximum rain per minute	0.00 in. on 02 at 23:59
Maximum temperature	74.7°F on 02 at 14:49
Minimum temperature	55.9°F on 02 at 06:44
Maximum humidity	95% on 02 at 07:08
Minimum humidity	56% on 02 at 14:59
Maximum pressure	30.120 in. on 02 at 09:46
Minimum pressure	29.982 in. on 02 at 19:43
Maximum windspeed	8.1 mph on 02 at 13:54
Maximum gust speed	15.0 mph from 086 °(E) on 02 at 16:39
Maximum heat index	77.2°F on 02 at 14:49

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3 September Average and Extremes
Average temperature	66.1°F
Average humidity	93%
Average dewpoint	63.8°F
Average barometer	29.9 in.
Average windspeed	4.3 mph
Average gustspeed	6.9 mph
Average direction	162° (SSE)
Rainfall for month	0.68 in.
Rainfall for year	20.68 in.
Maximum rain per minute	0.06 in. on 03 at 06:16
Maximum temperature	69.2°F on 03 at 18:46
Minimum temperature	61.6°F on 03 at 07:44
Maximum humidity	97% on 03 at 23:59
Minimum humidity	78% on 03 at 04:29
Maximum pressure	30.022 in. on 03 at 00:40
Minimum pressure	29.903 in. on 03 at 18:29
Maximum windspeed	13.8 mph on 03 at 04:33
Maximum gust speed	23.0 mph from 166 °(SSE) on 03 at 03:41
Maximum heat index	68.0°F on 03 at 16:14

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4 September Average and Extremes
Average temperature	67.3°F
Average humidity	90%
Average dewpoint	64.1°F
Average barometer	29.9 in.
Average windspeed	3.2 mph
Average gustspeed	5.0 mph
Average direction	341° (NNW)
Rainfall for month	0.69 in.
Rainfall for year	20.69 in.
Maximum rain per minute	0.01 in. on 04 at 02:58
Maximum temperature	73.1°F on 04 at 18:15
Minimum temperature	60.4°F on 04 at 23:48
Maximum humidity	98% on 04 at 08:20
Minimum humidity	70% on 04 at 18:55
Maximum pressure	29.990 in. on 04 at 23:43
Minimum pressure	29.897 in. on 04 at 02:27
Maximum windspeed	9.2 mph on 04 at 16:39
Maximum gust speed	15.0 mph from 05 °(N) on 04 at 15:08
Maximum heat index	75.1°F on 04 at 18:23

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5 September Average and Extremes
Average temperature	67.7°F
Average humidity	78%
Average dewpoint	59.6°F
Average barometer	30.0 in.
Average windspeed	3.8 mph
Average gustspeed	5.2 mph
Average direction	231° (SW)
Rainfall for month	0.69 in.
Rainfall for year	20.69 in.
Maximum rain per minute	0.00 in. on 05 at 23:59
Maximum temperature	80.1°F on 05 at 15:50
Minimum temperature	55.4°F on 05 at 06:28
Maximum humidity	97% on 05 at 08:27
Minimum humidity	43% on 05 at 15:40
Maximum pressure	30.015 in. on 05 at 09:22
Minimum pressure	29.916 in. on 05 at 19:57
Maximum windspeed	11.5 mph on 05 at 14:50
Maximum gust speed	13.8 mph from 208 °(SSW) on 05 at 16:44
Maximum heat index	81.2°F on 05 at 15:50

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6 September Average and Extremes
Average temperature	72.4°F
Average humidity	77%
Average dewpoint	64.1°F
Average barometer	29.9 in.
Average windspeed	2.4 mph
Average gustspeed	3.7 mph
Average direction	183° (S)
Rainfall for month	0.69 in.
Rainfall for year	20.69 in.
Maximum rain per minute	0.00 in. on 06 at 23:59
Maximum temperature	86.1°F on 06 at 16:38
Minimum temperature	59.6°F on 06 at 05:08
Maximum humidity	96% on 06 at 07:58
Minimum humidity	48% on 06 at 16:47
Maximum pressure	29.994 in. on 06 at 09:43
Minimum pressure	29.832 in. on 06 at 19:36
Maximum windspeed	9.2 mph on 06 at 16:18
Maximum gust speed	13.8 mph from 170 °(S) on 06 at 16:17
Maximum heat index	88.7°F on 06 at 16:31

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7 September Average and Extremes
Average temperature	72.9°F
Average humidity	73%
Average dewpoint	62.9°F
Average barometer	29.8 in.
Average windspeed	8.0 mph
Average gustspeed	10.7 mph
Average direction	245° (WSW)
Rainfall for month	0.69 in.
Rainfall for year	20.69 in.
Maximum rain per minute	0.00 in. on 07 at 23:59
Maximum temperature	83.9°F on 07 at 13:53
Minimum temperature	60.1°F on 07 at 23:59
Maximum humidity	93% on 07 at 07:02
Minimum humidity	41% on 07 at 18:17
Maximum pressure	29.903 in. on 07 at 23:58
Minimum pressure	29.739 in. on 07 at 08:38
Maximum windspeed	15.0 mph on 07 at 14:26
Maximum gust speed	23.0 mph from 333 °(NNW) on 07 at 17:21
Maximum heat index	87.3°F on 07 at 13:53

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8 September Average and Extremes
Average temperature	65.6°F
Average humidity	66%
Average dewpoint	52.8°F
Average barometer	30.0 in.
Average windspeed	6.1 mph
Average gustspeed	8.5 mph
Average direction	305° (NW)
Rainfall for month	0.69 in.
Rainfall for year	20.69 in.
Maximum rain per minute	0.00 in. on 08 at 23:59
Maximum temperature	77.5°F on 08 at 16:34
Minimum temperature	54.5°F on 08 at 07:15
Maximum humidity	87% on 08 at 07:42
Minimum humidity	42% on 08 at 17:02
Maximum pressure	30.021 in. on 08 at 22:56
Minimum pressure	29.902 in. on 08 at 01:48
Maximum windspeed	16.1 mph on 08 at 13:50
Maximum gust speed	24.2 mph from 327 °(NNW) on 08 at 13:49
Maximum heat index	78.7°F on 08 at 16:03

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9 September Average and Extremes
Average temperature	65.0°F
Average humidity	68%
Average dewpoint	53.4°F
Average barometer	30.1 in.
Average windspeed	2.7 mph
Average gustspeed	3.9 mph
Average direction	290° (WNW)
Rainfall for month	0.69 in.
Rainfall for year	20.69 in.
Maximum rain per minute	0.00 in. on 09 at 23:59
Maximum temperature	77.6°F on 09 at 16:38
Minimum temperature	52.5°F on 09 at 07:13
Maximum humidity	90% on 09 at 07:50
Minimum humidity	42% on 09 at 16:33
Maximum pressure	30.105 in. on 09 at 11:02
Minimum pressure	30.012 in. on 09 at 19:08
Maximum windspeed	10.4 mph on 09 at 11:41
Maximum gust speed	16.1 mph from 215 °(SW) on 09 at 11:38
Maximum heat index	78.7°F on 09 at 16:38

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10 September Average and Extremes
Average temperature	67.2°F
Average humidity	76%
Average dewpoint	58.4°F
Average barometer	30.0 in.
Average windspeed	2.4 mph
Average gustspeed	4.1 mph
Average direction	148° (SSE)
Rainfall for month	0.69 in.
Rainfall for year	20.69 in.
Maximum rain per minute	0.00 in. on 10 at 23:59
Maximum temperature	83.3°F on 10 at 15:42
Minimum temperature	51.8°F on 10 at 06:25
Maximum humidity	94% on 10 at 07:37
Minimum humidity	50% on 10 at 15:43
Maximum pressure	30.074 in. on 10 at 00:59
Minimum pressure	29.903 in. on 10 at 17:15
Maximum windspeed	12.7 mph on 10 at 14:10
Maximum gust speed	19.6 mph from 083 °(E) on 10 at 12:17
Maximum heat index	84.9°F on 10 at 15:38

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11 September Average and Extremes
Average temperature	73.8°F
Average humidity	82%
Average dewpoint	67.3°F
Average barometer	29.9 in.
Average windspeed	4.9 mph
Average gustspeed	6.7 mph
Average direction	177° (S)
Rainfall for month	0.69 in.
Rainfall for year	20.69 in.
Maximum rain per minute	0.00 in. on 11 at 23:59
Maximum temperature	89.0°F on 11 at 15:44
Minimum temperature	60.2°F on 11 at 05:45
Maximum humidity	97% on 11 at 09:10
Minimum humidity	59% on 11 at 16:30
Maximum pressure	29.921 in. on 11 at 06:50
Minimum pressure	29.797 in. on 11 at 18:52
Maximum windspeed	13.8 mph on 11 at 18:52
Maximum gust speed	20.7 mph from 171 °(S) on 11 at 21:45
Maximum heat index	98.2°F on 11 at 15:36

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12 September Average and Extremes
Average temperature	72.3°F
Average humidity	84%
Average dewpoint	67.3°F
Average barometer	30.0 in.
Average windspeed	5.8 mph
Average gustspeed	7.9 mph
Average direction	205° (SSW)
Rainfall for month	0.69 in.
Rainfall for year	20.69 in.
Maximum rain per minute	0.00 in. on 12 at 23:59
Maximum temperature	79.4°F on 12 at 14:10
Minimum temperature	66.6°F on 12 at 23:59
Maximum humidity	93% on 12 at 23:59
Minimum humidity	77% on 12 at 16:33
Maximum pressure	30.064 in. on 12 at 21:55
Minimum pressure	29.866 in. on 12 at 00:49
Maximum windspeed	16.1 mph on 12 at 12:03
Maximum gust speed	20.7 mph from 275 °(W) on 12 at 12:02
Maximum heat index	82.9°F on 12 at 14:10

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13 September Average and Extremes
Average temperature	73.0°F
Average humidity	80%
Average dewpoint	65.9°F
Average barometer	29.9 in.
Average windspeed	6.5 mph
Average gustspeed	8.8 mph
Average direction	157° (SSE)
Rainfall for month	0.69 in.
Rainfall for year	20.69 in.
Maximum rain per minute	0.00 in. on 13 at 23:59
Maximum temperature	85.7°F on 13 at 16:09
Minimum temperature	62.4°F on 13 at 05:13
Maximum humidity	98% on 13 at 09:39
Minimum humidity	56% on 13 at 16:46
Maximum pressure	30.055 in. on 13 at 00:25
Minimum pressure	29.799 in. on 13 at 23:44
Maximum windspeed	16.1 mph on 13 at 18:16
Maximum gust speed	24.2 mph from 161 °(SSE) on 13 at 18:16
Maximum heat index	90.7°F on 13 at 15:39

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14 September Average and Extremes
Average temperature	69.2°F
Average humidity	79%
Average dewpoint	62.2°F
Average barometer	29.9 in.
Average windspeed	5.1 mph
Average gustspeed	7.2 mph
Average direction	281° (W)
Rainfall for month	0.69 in.
Rainfall for year	20.69 in.
Maximum rain per minute	0.00 in. on 14 at 23:59
Maximum temperature	74.7°F on 14 at 00:16
Minimum temperature	59.0°F on 14 at 23:59
Maximum humidity	92% on 14 at 06:34
Minimum humidity	61% on 14 at 16:18
Maximum pressure	30.011 in. on 14 at 23:58
Minimum pressure	29.767 in. on 14 at 04:06
Maximum windspeed	11.5 mph on 14 at 10:09
Maximum gust speed	18.4 mph from 346 °(NNW) on 14 at 00:30
Maximum heat index	76.7°F on 14 at 15:53

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15 September Average and Extremes
Average temperature	65.7°F
Average humidity	73%
Average dewpoint	55.7°F
Average barometer	30.0 in.
Average windspeed	1.2 mph
Average gustspeed	2.1 mph
Average direction	191° (S)
Rainfall for month	0.69 in.
Rainfall for year	20.69 in.
Maximum rain per minute	0.00 in. on 15 at 23:59
Maximum temperature	79.2°F on 15 at 16:15
Minimum temperature	52.8°F on 15 at 06:33
Maximum humidity	98% on 15 at 07:54
Minimum humidity	42% on 15 at 17:00
Maximum pressure	30.097 in. on 15 at 10:37
Minimum pressure	29.983 in. on 15 at 17:26
Maximum windspeed	8.1 mph on 15 at 14:59
Maximum gust speed	11.5 mph from 179 °(S) on 15 at 14:59
Maximum heat index	79.8°F on 15 at 16:14

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16 September Average and Extremes
Average temperature	70.4°F
Average humidity	67%
Average dewpoint	58.3°F
Average barometer	30.0 in.
Average windspeed	7.3 mph
Average gustspeed	10.3 mph
Average direction	170° (S)
Rainfall for month	0.69 in.
Rainfall for year	20.69 in.
Maximum rain per minute	0.00 in. on 16 at 23:59
Maximum temperature	84.3°F on 16 at 15:49
Minimum temperature	58.4°F on 16 at 06:46
Maximum humidity	83% on 16 at 06:59
Minimum humidity	50% on 16 at 16:26
Maximum pressure	30.037 in. on 16 at 08:46
Minimum pressure	29.922 in. on 16 at 16:53
Maximum windspeed	18.4 mph on 16 at 16:26
Maximum gust speed	26.5 mph from 163 °(SSE) on 16 at 16:25
Maximum heat index	86.0°F on 16 at 15:48

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17 September Average and Extremes
Average temperature	68.4°F
Average humidity	74%
Average dewpoint	59.4°F
Average barometer	30.1 in.
Average windspeed	6.0 mph
Average gustspeed	8.3 mph
Average direction	28° (NNE)
Rainfall for month	0.69 in.
Rainfall for year	20.69 in.
Maximum rain per minute	0.00 in. on 17 at 23:59
Maximum temperature	80.5°F on 17 at 13:13
Minimum temperature	59.1°F on 17 at 23:59
Maximum humidity	87% on 17 at 08:01
Minimum humidity	56% on 17 at 15:13
Maximum pressure	30.196 in. on 17 at 22:10
Minimum pressure	29.944 in. on 17 at 00:54
Maximum windspeed	13.8 mph on 17 at 13:38
Maximum gust speed	19.6 mph from 347 °(NNW) on 17 at 13:43
Maximum heat index	82.6°F on 17 at 13:12

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18 September Average and Extremes
Average temperature	68.0°F
Average humidity	73%
Average dewpoint	58.5°F
Average barometer	30.2 in.
Average windspeed	3.6 mph
Average gustspeed	4.9 mph
Average direction	78° (ENE)
Rainfall for month	0.69 in.
Rainfall for year	20.69 in.
Maximum rain per minute	0.00 in. on 18 at 23:59
Maximum temperature	84.6°F on 18 at 15:34
Minimum temperature	53.7°F on 18 at 05:14
Maximum humidity	90% on 18 at 23:59
Minimum humidity	52% on 18 at 15:15
Maximum pressure	30.234 in. on 18 at 07:17
Minimum pressure	30.073 in. on 18 at 19:29
Maximum windspeed	10.4 mph on 18 at 09:43
Maximum gust speed	12.7 mph from 070 °(ENE) on 18 at 09:44
Maximum heat index	87.7°F on 18 at 15:34

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19 September Average and Extremes
Average temperature	74.4°F
Average humidity	77%
Average dewpoint	65.9°F
Average barometer	30.0 in.
Average windspeed	5.2 mph
Average gustspeed	7.5 mph
Average direction	169° (SSE)
Rainfall for month	0.69 in.
Rainfall for year	20.69 in.
Maximum rain per minute	0.00 in. on 19 at 23:59
Maximum temperature	87.5°F on 19 at 15:24
Minimum temperature	62.1°F on 19 at 06:58
Maximum humidity	97% on 19 at 08:00
Minimum humidity	53% on 19 at 15:53
Maximum pressure	30.087 in. on 19 at 00:18
Minimum pressure	29.876 in. on 19 at 18:28
Maximum windspeed	19.6 mph on 19 at 15:52
Maximum gust speed	26.5 mph from 175 °(S) on 19 at 15:50
Maximum heat index	92.2°F on 19 at 15:20

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20 September Average and Extremes
Average temperature	71.1°F
Average humidity	85%
Average dewpoint	66.2°F
Average barometer	29.8 in.
Average windspeed	8.0 mph
Average gustspeed	11.4 mph
Average direction	194° (SSW)
Rainfall for month	0.69 in.
Rainfall for year	20.69 in.
Maximum rain per minute	0.00 in. on 20 at 23:59
Maximum temperature	84.2°F on 20 at 15:55
Minimum temperature	59.8°F on 20 at 23:59
Maximum humidity	97% on 20 at 09:17
Minimum humidity	65% on 20 at 15:59
Maximum pressure	29.980 in. on 20 at 23:46
Minimum pressure	29.674 in. on 20 at 16:34
Maximum windspeed	25.3 mph on 20 at 17:44
Maximum gust speed	33.4 mph from 261 °(W) on 20 at 17:44
Maximum heat index	89.6°F on 20 at 15:56

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Average and Extremes for Month of September 2021 up to day 20
Average temperature	69.1°F
Average humidity	78%
Average dewpoint	61.2°F
Average barometer	29.968 in.
Average windspeed	4.6 mph
Average gustspeed	6.6 mph
Average direction	184° (S)
Rainfall for month	0.690 in.
Rainfall for year	20.690 in.
Maximum rain per minute	0.060 in on 03 at 06:16
Maximum temperature	89.0°F on 11 at 15:44
Minimum temperature	51.8°F on 10 at 06:25
Maximum humidity	98% on 15 at 07:54
Minimum humidity	41% on 07 at 18:17
Maximum pressure	30.23 in. on 18 at 07:17
Minimum pressure	29.67 in. on 20 at 16:34
Maximum windspeed	25.3 mph from 261°(W) on 20 at 17:44
Maximum gust speed	33.4 mph from 270°(W) on 20 at 17:44
Maximum heat index	98.2°F on 11 at 15:36
Avg daily max temp	80.6°F
Avg daily min temp	58.2°F

Day, Sunshine Hours, ET, Max Solar, UV
01 08:18hrs	ET :0.181 in.	875.0 W/m²	7.4 uv
02 00:48hrs	ET :0.114 in.	865.0 W/m²	6.6 uv
03 00:00hrs	ET :0.035 in.	178.0 W/m²	1.8 uv
04 01:00hrs	ET :0.083 in.	779.0 W/m²	6.4 uv
05 09:48hrs	ET :0.173 in.	896.0 W/m²	6.7 uv
06 08:18hrs	ET :0.165 in.	766.0 W/m²	7.2 uv
07 02:54hrs	ET :0.224 in.	765.0 W/m²	5.4 uv
08 09:00hrs	ET :0.209 in.	958.0 W/m²	6.9 uv
09 05:12hrs	ET :0.169 in.	817.0 W/m²	6.1 uv
10 00:48hrs	ET :0.169 in.	726.0 W/m²	5.7 uv
11 00:00hrs	ET :0.185 in.	703.0 W/m²	4.8 uv
12 00:48hrs	ET :0.114 in.	788.0 W/m²	5.3 uv
13 01:00hrs	ET :0.185 in.	796.0 W/m²	5.2 uv
14 01:06hrs	ET :0.106 in.	772.0 W/m²	5.9 uv
15 08:42hrs	ET :0.154 in.	744.0 W/m²	6.1 uv
16 08:48hrs	ET :0.252 in.	710.0 W/m²	5.9 uv
17 03:30hrs	ET :0.173 in.	918.0 W/m²	6.9 uv
18 00:00hrs	ET :0.165 in.	686.0 W/m²	5.6 uv
19 06:48hrs	ET :0.181 in.	729.0 W/m²	6.0 uv
20 02:18hrs	ET :0.150 in.	865.0 W/m²	6.7 uv

Daily Rain Totals

00.68 in. on 3

00.01 in. on 4