MONTHLY CLIMATOLOGICAL SUMMARY for DEC. 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 13.8 24.9 1:50p -1.8 2:35a 51.2 0.0 0.01 0.3 4.0 1:35p S 2 18.6 22.8 11:55p 6.5 3:20a 46.4 0.0 0.00 3.8 17.0 7:30p WNW 3 24.4 32.5 10:55a 7.1 11:55p 40.6 0.0 0.01 5.8 19.0 6:55p N 4 -0.9 12.8 1:05p -14.4 10:10p 65.9 0.0 0.00 0.6 8.0 12:00m W 5 20.2 28.1 11:30p -2.9 12:05a 44.8 0.0 0.00 3.7 16.0 12:40p SW 6 27.0 30.3 9:20a 23.1 12:00m 38.0 0.0 0.01 2.1 14.0 9:30a ENE 7 11.9 23.5 4:20a -13.9 10:25p 53.1 0.0 0.00 6.0 22.0 8:20a NE 8 11.9 23.1 2:05p -9.7 12:05a 53.1 0.0 0.00 2.2 13.0 7:50p S 9 29.0 38.4 12:00m 19.8 12:25a 36.0 0.0 0.00 4.5 19.0 5:35a WSW 10 30.3 39.3 1:10a 25.4 11:10p 34.7 0.0 0.28 10.5 27.0 6:10a NNW 11 21.9 25.5 12:05a 17.7 8:20p 43.1 0.0 0.00 1.8 9.0 12:10a N 12 16.8 25.5 5:25p 1.0 7:30a 48.2 0.0 0.00 3.8 24.0 9:55p WNW 13 4.0 13.4 12:05a -3.1 11:20p 61.0 0.0 0.00 7.3 21.0 12:15a WNW 14 -1.3 3.4 5:30p -7.4 7:25a 66.3 0.0 0.00 5.0 12.0 5:30a NW 15 12.5 22.4 3:40p 1.4 12:05a 52.5 0.0 0.00 4.0 27.0 4:15a SW 16 22.0 36.2 12:00m 2.7 3:50a 43.0 0.0 0.03 3.1 16.0 4:30p SW 17 32.8 39.4 2:25p 26.9 7:15p 32.2 0.0 0.03 3.1 18.0 11:45p W 18 33.5 44.5 11:25a 13.5 11:55p 31.5 0.0 0.21 9.9 35.0 8:00p WNW 19 13.3 22.1 12:00m 6.2 7:05a 51.7 0.0 0.00 8.3 30.0 3:25a WNW 20 32.0 38.5 3:05p 21.6 12:00m 33.0 0.0 0.00 8.2 30.0 6:45p WNW 21 21.4 31.4 11:45p 8.4 7:40a 43.6 0.0 0.00 2.6 15.0 2:10a SSE 22 34.8 38.0 1:40p 31.2 12:10a 30.2 0.0 0.00 2.1 13.0 8:30a SSE 23 35.0 45.3 1:05p 27.9 5:25a 30.0 0.0 0.00 1.6 9.0 2:20p WNW 24 35.3 44.1 2:10p 26.1 3:10a 29.7 0.0 0.01 1.3 14.0 11:45a SE 25 38.1 42.0 11:30p 36.4 10:10a 26.9 0.0 0.00 4.6 19.0 10:20p ESE 26 39.9 43.1 11:00a 37.0 11:55p 25.1 0.0 0.03 4.1 17.0 2:45a NNW 27 39.5 42.7 9:50p 36.2 7:00a 25.5 0.0 0.01 3.8 18.0 11:10a SSE 28 37.7 44.8 10:55a 15.8 12:00m 27.3 0.0 0.81 7.2 40.0 11:25p WNW 29 16.9 21.4 12:05p 11.1 12:00m 48.1 0.0 0.00 14.1 34.0 2:15a NW 30 16.4 27.9 12:00m 7.4 5:40a 48.6 0.0 0.00 4.7 13.0 1:10a WNW 31 29.7 35.9 12:55p 13.8 12:00m 35.3 0.0 0.06 8.9 27.0 6:35p W ------------------------------------------------------------------------------------- 23.2 45.3 23 -14.4 4 1296.6 0.0 1.50 4.8 40.0 28 WNW Max >= 90.0: 0 Max <= 32.0: 16 Min <= 32.0: 28 Min <= 0.0: 7 Max Rain: 0.81 ON 12/28/25 Days of Rain: 7 (>.01 in) 3 (>.1 in) 0 (>1 in) Heat Base: 65.0 Cool Base: 65.0 Method: Integration