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Report for 2021 September
Monthly Climatological Summary for Sep 2021
Name: NapervilleWather.com City: Naperville State: IL
Elevation: 781 ft Lat: N 41° 47' 23" Lon: W 088° 07' 27"
Temperature (°F), Rain (in), Wind Speed (mph)
Heat Cool Avg
Mean Deg Deg Wind Dom
Day Temp High Time Low Time Days Days Rain Speed High Time Dir
----------------------------------------------------------------------------------
1 71.2 80.6 15:53 63.4 23:55 0.1 6.3 0.00 0.3 7.0 08:53 S
2 69.2 82.3 15:24 58.9 06:29 1.4 5.5 0.00 0.2 6.0 00:25 ENE
3 66.9 73.2 11:32 58.0 06:53 1.0 3.0 0.03 0.0 6.0 05:32 ENE
4 68.8 73.7 12:27 62.9 23:58 0.0 3.8 0.00 0.1 8.0 07:16 WNW
5 69.3 83.8 16:35 56.0 06:44 2.3 6.7 0.00 0.5 11.0 16:07 WNW
6 71.0 85.3 17:20 57.5 06:58 1.2 7.1 0.00 0.2 11.0 04:21 WNW
7 70.8 88.6 13:22 59.5 23:59 0.6 6.4 0.07 0.3 13.0 22:07 SE
8 66.1 79.8 14:13 53.6 06:09 3.2 4.3 0.00 0.8 18.0 02:47 WNW
9 65.8 80.0 14:52 55.3 06:45 3.0 3.8 0.00 0.2 18.0 02:47 WNW
10 67.4 82.8 16:01 54.2 06:47 3.0 5.4 0.00 0.1 9.0 14:41 ESE
12 63.3 64.6 00:00 62.7 04:35 0.4 0.0 0.00 ---- 9.0 02:56 ---
13 79.8 89.2 15:04 0.0 09:11 0.0 9.2 0.00 0.1 5.0 14:06 ESE
14 75.1 88.4 15:06 66.1 23:51 0.0 10.0 0.00 0.9 12.0 16:04 WNW
15 66.8 82.5 15:22 56.2 06:27 2.1 3.9 0.00 0.2 12.0 03:59 WNW
16 68.0 85.3 15:43 52.4 06:47 3.4 6.4 0.00 0.2 7.0 00:34 SE
17 72.5 91.8 15:28 59.4 06:57 1.5 9.0 0.13 0.2 9.0 19:00 NNW
18 70.8 84.0 16:08 63.4 06:50 0.1 5.9 0.00 0.2 9.0 06:54 SSE
19 75.6 91.9 14:38 62.9 06:44 0.4 11.0 0.00 0.1 5.0 04:29 E
20 74.0 81.8 16:14 69.4 08:52 0.0 9.0 0.24 0.3 6.0 03:33 ESE
21 63.9 75.0 00:01 60.0 23:39 1.8 0.7 0.35 0.5 12.0 01:32 NW
22 58.6 62.3 14:49 55.9 04:41 6.4 0.0 0.05 1.0 14.0 01:56 NW
23 57.1 69.4 16:29 49.4 07:22 8.3 0.5 0.00 1.3 14.0 01:56 NW
24 62.6 80.5 15:57 46.1 06:36 6.8 4.4 0.08 0.6 14.0 02:37 SSE
25 59.0 72.2 15:30 47.9 07:15 6.9 0.9 0.02 0.5 11.0 03:34 NW
26 66.5 84.5 14:33 49.4 06:35 4.9 6.4 0.00 0.5 9.0 00:33 SE
27 71.2 89.9 15:34 61.7 23:53 0.6 6.9 0.00 0.3 7.0 00:32 SSE
28 65.7 79.9 14:36 58.6 06:13 2.4 3.1 0.00 0.2 7.0 04:19 ESE
29 68.1 87.0 15:46 55.8 07:11 2.9 6.0 0.00 0.1 5.0 00:18 E
30 69.3 85.9 15:15 58.4 06:06 1.6 5.8 0.00 0.2 6.0 04:24 E
----------------------------------------------------------------------------------
68.1 91.9 19 0.0 13 66.3 151.4 0.97 0.4 18.0 8 WNW
Max >= 80.0: 20
Max <= 25.2: 0
Min <= 32.0: 1
Min <= 0.0: 1
Max Rain: 0.35 on day 21
Days of Rain: 8 (>= 0.01 in) 3 (>= 0.10 in) 0 (>= 1.00 in)
Heat Base: 65.0 Cool Base: 65.0 Method: Integration