MONTHLY CLIMATOLOGICAL SUMMARY for SEP. 2025 NAME: Hawkeye Observatory CITY: Durand STATE: Illinois ELEV: 758 ft LAT: 42° 26' 20" N LONG: 89° 18' 35" W 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 61.9 78.9 4:05p 46.1 6:40a 7.2 4.2 0.00 0.5 8.0 11:35a E 2 63.0 78.8 3:35p 47.7 6:30a 6.3 4.3 0.01 0.7 9.0 4:05p W 3 61.4 69.2 3:20p 48.6 11:55p 4.1 0.6 0.21 3.4 19.0 5:50p W 4 53.8 65.9 4:00p 39.3 6:10a 11.2 0.0 0.01 2.4 15.0 3:40p W 5 56.0 63.6 4:00p 42.6 11:40p 9.0 0.0 0.01 5.3 23.0 4:40p W 6 53.4 66.3 4:15p 42.6 12:00m 11.7 0.0 0.00 3.0 18.0 12:40p W 7 51.4 66.7 3:25p 37.0 6:55a 13.6 0.1 0.01 2.1 17.0 12:20p WNW 8 55.4 72.9 4:20p 36.2 6:50a 11.5 1.9 0.00 1.7 15.0 2:20p SSE 9 59.9 76.8 5:00p 43.5 6:50a 8.0 2.9 0.00 1.6 15.0 1:40p S 10 61.7 77.3 2:25p 48.9 3:10a 6.4 3.1 0.00 0.4 8.0 4:15p ENE 11 67.3 82.3 5:05p 54.4 4:20a 3.3 5.6 0.00 0.8 10.0 1:35p ENE 12 66.9 84.6 4:45p 50.0 3:35a 4.2 6.1 0.00 1.4 13.0 3:10p SSE 13 71.7 83.4 4:50p 64.0 12:00m 0.1 6.8 0.00 2.0 19.0 5:50a SSE 14 70.8 87.7 4:20p 57.5 6:00a 1.5 7.2 0.00 1.0 11.0 1:10p ENE 15 70.7 88.6 4:00p 54.9 6:30a 2.6 8.4 0.00 1.1 12.0 12:10p SE 16 68.8 88.3 4:25p 51.9 6:50a 4.2 7.9 0.00 0.6 11.0 12:25p SE 17 68.5 87.7 5:45p 53.1 6:35a 4.0 7.5 0.00 0.5 8.0 2:10p ESE 18 69.8 88.0 3:30p 53.5 6:30a 3.3 8.0 0.00 1.0 8.0 3:30p NW 19 70.0 81.9 12:20p 60.0 7:15a 1.0 6.0 0.00 0.9 10.0 12:20p E 20 68.4 77.8 11:05a 60.5 2:00a 1.1 4.5 0.00 0.7 8.0 4:15p SSW 21 66.7 79.9 2:10p 55.1 7:15a 2.5 4.2 0.00 0.8 21.0 3:15p SE 22 68.7 82.0 4:20p 55.2 5:35a 2.2 5.8 0.00 1.2 11.0 3:00p SSW 23 66.6 78.1 12:25p 57.6 7:10a 1.7 3.3 0.00 2.1 17.0 2:00p ENE 24 60.9 71.3 1:05p 52.5 4:05a 5.2 1.2 0.00 3.3 17.0 1:55p NNE 25 60.7 77.9 3:45p 46.3 6:45a 7.7 3.5 0.01 2.2 17.0 1:35p NNW 26 65.3 87.2 3:30p 46.0 6:10a 6.8 7.1 0.00 1.7 15.0 3:55p W 27 67.5 86.8 3:30p 49.9 7:05a 4.9 7.4 0.01 2.1 19.0 3:10p W 28 66.7 85.6 5:20p 50.2 5:40a 4.7 6.4 0.00 0.9 11.0 10:00a NNE 29 66.7 89.8 4:35p 47.1 7:15a 6.4 8.1 0.00 0.6 11.0 3:10p W 30 66.1 86.6 2:30p 49.0 5:20a 5.8 6.9 0.00 1.1 15.0 4:05p ENE ------------------------------------------------------------------------------------- 64.2 89.8 29 36.2 8 162.2 139.0 0.27 1.6 23.0 5 W Max >= 90.0: 0 Max <= 32.0: 0 Min <= 32.0: 0 Min <= 0.0: 0 Max Rain: 0.21 ON 09/03/25 Days of Rain: 1 (>.01 in) 1 (>.1 in) 0 (>1 in) Heat Base: 65.0 Cool Base: 65.0 Method: Integration