ANNUAL CLIMATOLOGICAL SUMMARY NAME: Hawkeye Observatory CITY: Durand STATE: Illinois ELEV: 758 ft LAT: 42° 26' 20" N LONG: 89° 18' 35" W TEMPERATURE (°F), HEAT BASE 65.0, COOL BASE 65.0 DEP. HEAT COOL MEAN MEAN FROM DEG DEG MAX MAX MIN MIN YR MO MAX MIN MEAN NORM DAYS DAYS HI DATE LOW DATE >=90 <=32 <=32 <=0 ------------------------------------------------------------------------------------ 21 1 30.1 15.7 24.1 0.0 1268 0 37.8 13 -11.4 28 0 23 31 3 21 2 21.9 1.5 13.2 0.0 1450 0 45.2 27 -18.8 17 0 19 27 15 21 3 50.0 28.6 39.8 0.0 781 0 67.0 29 6.8 2 0 1 20 0 21 4 60.9 38.6 50.1 0.0 471 25 84.2 27 20.3 1 0 0 9 0 21 5 69.3 47.5 58.9 0.0 272 85 86.4 1 29.1 8 0 0 3 0 21 6 84.0 60.6 73.1 0.0 43 284 94.2 11 42.4 22 8 0 0 0 21 7 82.4 60.5 71.6 0.0 39 245 91.8 5 51.1 3 4 0 0 0 21 8 85.2 59.4 72.2 0.0 54 279 95.0 24 47.9 2 4 0 0 0 21 9 80.6 49.8 65.0 0.0 152 152 91.2 19 39.4 24 1 0 0 0 21 10 65.9 46.0 55.7 0.0 332 44 87.0 1 28.0 23 0 0 5 0 21 11 47.5 26.4 37.0 0.0 838 0 65.7 7 13.3 26 0 1 23 0 21 12 41.5 23.2 33.0 0.0 994 1 68.1 15 6.7 7 0 4 28 0 ------------------------------------------------------------------------------------ 60.2 38.4 49.7 0.0 6695 1115 95.0 AUG -18.8 FEB 17 48 146 18 PRECIPITATION (in) DEP. MAX DAYS OF RAIN FROM OBS. OVER YR MO TOTAL NORM DAY DATE .01 .1 1 --------------------------------------------- 21 1 0.66 0.00 0.27 15 9 1 0 21 2 0.36 0.00 0.13 22 6 1 0 21 3 1.80 0.00 0.60 23 9 5 0 21 4 0.74 0.00 0.22 21 7 2 0 21 5 0.58 0.00 0.23 3 8 2 0 21 6 0.53 0.00 0.29 8 4 2 0 21 7 0.60 0.00 0.27 29 4 2 0 21 8 3.02 0.00 1.01 9 7 5 1 21 9 0.66 0.00 0.22 20 5 3 0 21 10 4.73 0.00 0.89 11 13 9 0 21 11 0.55 0.00 0.34 11 3 2 0 21 12 1.43 0.00 0.50 10 6 4 0 --------------------------------------------- 15.66 0.00 1.01 AUG 81 38 1 WIND SPEED (mph) DOM YR MO AVG. HI DATE DIR --------------------------------- 21 1 5.0 28.0 21 WNW 21 2 5.0 32.0 4 WNW 21 3 6.0 45.0 18 WNW 21 4 5.7 44.0 29 NW 21 5 4.8 38.0 3 SSW 21 6 3.4 31.0 18 SSW 21 7 3.0 34.0 7 ENE 21 8 2.3 43.0 10 SSW 21 9 3.0 31.0 24 W 21 10 3.9 33.0 25 W 21 11 4.8 39.0 21 WNW 21 12 4.9 47.0 15 W --------------------------------- 4.3 47.0 DEC W