MONTHLY CLIMATOLOGICAL SUMMARY for MAY. 2026 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 43.4 51.3 3:45p 34.4 12:00m 21.6 0.0 0.00 2.7 16.0 5:00p N 2 45.0 58.1 3:25p 27.1 6:20a 20.0 0.0 0.00 3.6 18.0 3:25p WNW 3 56.7 71.4 6:05p 46.5 1:05a 9.4 1.0 0.04 5.2 29.0 12:25p WSW 4 61.7 80.6 4:20p 37.6 5:40a 8.2 4.9 0.00 6.2 28.0 7:15p W 5 51.0 57.5 3:55p 37.6 12:00m 14.0 0.0 0.00 7.1 22.0 10:05a NW 6 42.9 54.1 3:05p 29.7 6:00a 22.1 0.0 0.00 5.5 24.0 4:40p NW 7 45.5 63.6 5:45p 25.8 5:50a 19.5 0.0 0.00 3.3 22.0 3:50p NW 8 53.4 70.4 5:55p 29.0 6:10a 12.6 1.0 0.00 2.6 17.0 2:45p SW 9 60.3 71.9 1:45p 47.3 11:45p 6.2 1.5 0.00 7.7 36.0 1:35p NW 10 51.5 65.0 5:50p 31.6 5:55a 13.5 0.0 0.00 3.9 23.0 11:45a NNW 11 51.5 64.5 6:20p 37.8 6:05a 13.5 0.0 0.00 3.7 16.0 7:55p NE 12 57.8 75.1 7:10p 40.9 4:35a 9.4 2.2 0.02 5.6 27.0 3:45p SE 13 56.4 65.5 6:00p 41.2 11:50p 8.6 0.0 0.00 8.9 30.0 8:45a N 14 55.7 72.3 5:05p 32.9 5:10a 10.8 1.5 0.00 2.0 14.0 2:40p SSE 15 67.4 80.6 4:35p 53.9 3:35a 3.1 5.5 0.00 4.7 22.0 10:40a S 16 71.4 82.9 4:10p 59.7 4:25a 1.1 7.5 0.22 3.4 29.0 1:15a NW 17 74.0 83.5 4:50p 64.8 6:20a 0.0 9.0 0.00 3.4 21.0 3:25p S 18 73.2 79.1 5:40p 64.6 6:55a 0.0 8.2 0.15 3.7 19.0 4:30a S 19 64.9 73.6 11:15a 52.0 11:50p 2.1 2.1 0.14 6.8 24.0 2:15p W 20 55.2 66.7 5:35p 41.4 6:05a 9.9 0.1 0.00 4.2 18.0 1:15p N 21 51.7 61.0 5:10p 42.6 5:40a 13.3 0.0 0.00 3.5 19.0 2:25p ENE 22 59.4 71.7 3:40p 48.5 4:45a 6.6 0.9 0.00 3.2 21.0 10:15a E 23 65.9 78.8 3:05p 53.9 5:40a 3.3 4.2 0.00 1.5 11.0 1:55p E 24 67.5 80.0 3:45p 55.2 12:00m 2.8 5.3 0.03 3.7 22.0 2:45p NNW 25 70.6 86.4 4:00p 50.4 4:40a 3.8 9.5 0.00 2.3 21.0 3:25p SSW 26 72.5 88.9 4:25p 51.6 5:30a 2.6 10.1 0.00 1.8 14.0 2:25p SSW 27 72.6 89.9 4:20p 51.5 5:55a 3.2 10.8 0.00 1.8 13.0 1:15p ENE 28 68.5 83.4 3:10p 51.4 11:55p 2.6 6.0 0.00 2.3 15.0 5:00p ENE 29 65.4 85.6 3:55p 42.2 5:40a 6.9 7.3 0.00 1.0 9.0 12:50p E 30 65.7 79.3 3:20p 49.8 5:50a 3.9 4.7 0.00 2.7 17.0 3:35p E 31 67.1 80.7 5:15p 51.4 4:55a 3.7 5.8 0.02 1.5 11.0 9:05a SE ------------------------------------------------------------------------------------- 60.2 89.9 27 25.8 7 258.3 109.1 0.62 3.9 36.0 9 NW Max >= 90.0: 0 Max <= 32.0: 0 Min <= 32.0: 5 Min <= 0.0: 0 Max Rain: 0.22 ON 05/16/26 Days of Rain: 7 (>.01 in) 3 (>.1 in) 0 (>1 in) Heat Base: 65.0 Cool Base: 65.0 Method: Integration