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 ------------------------------------------------------------------------------------ 23 1 33.3 22.3 28.0 0.0 1147 0 48.7 11 -18.8 31 0 12 24 2 23 2 38.6 19.4 29.7 0.0 987 0 50.9 12 -9.8 1 0 5 24 2 23 3 44.4 27.2 35.6 0.0 910 0 69.4 31 10.3 18 0 2 24 0 23 4 61.1 34.7 48.1 0.0 537 31 82.0 14 23.9 7 0 0 13 0 23 5 75.3 45.9 61.1 0.0 232 112 92.3 31 32.6 4 1 0 0 0 23 6 82.4 54.4 69.1 0.0 89 212 91.9 3 41.0 12 3 0 0 0 23 7 83.6 59.8 71.6 0.0 43 248 91.9 27 48.9 18 4 0 0 0 23 8 82.5 58.1 70.8 0.0 59 239 98.8 23 38.3 31 3 0 0 0 23 9 77.6 55.0 65.6 0.0 107 127 93.3 3 38.4 14 2 0 0 0 23 10 62.4 42.2 52.2 0.0 436 38 86.4 1 24.1 30 0 0 4 0 23 11 49.2 27.4 38.4 0.0 797 0 68.2 6 6.4 28 0 3 22 0 23 12 41.6 29.9 36.0 0.0 898 0 56.3 25 11.3 19 0 0 17 0 ------------------------------------------------------------------------------------ 61.1 39.8 50.6 0.0 6241 1007 98.8 AUG -18.8 JAN 13 22 128 4 PRECIPITATION (in) DEP. MAX DAYS OF RAIN FROM OBS. OVER YR MO TOTAL NORM DAY DATE .01 .1 1 --------------------------------------------- 23 1 1.48 0.00 0.54 16 7 6 0 23 2 3.18 0.00 1.20 27 12 5 1 23 3 2.59 0.00 0.59 31 14 8 0 23 4 1.82 0.00 0.51 16 11 5 0 23 5 1.66 0.00 0.67 8 6 5 0 23 6 1.90 0.00 0.65 24 6 4 0 23 7 3.38 0.00 1.32 28 9 6 1 23 8 0.74 0.00 0.50 14 4 1 0 23 9 2.17 0.00 0.83 26 12 5 0 23 10 2.91 0.00 0.94 13 9 6 0 23 11 0.98 0.00 0.52 21 5 3 0 23 12 2.97 0.00 0.83 28 11 7 0 --------------------------------------------- 25.78 0.00 1.32 JUL 106 61 2 WIND SPEED (mph) DOM YR MO AVG. HI DATE DIR --------------------------------- 23 1 5.0 31.0 27 W 23 2 5.2 34.0 9 SW 23 3 5.6 35.0 17 WNW 23 4 5.8 44.0 4 W 23 5 4.2 35.0 1 E 23 6 3.2 40.0 24 ENE 23 7 2.5 35.0 26 W 23 8 2.8 30.0 11 ENE 23 9 2.5 22.0 3 SSE 23 10 4.4 32.0 14 NW 23 11 4.5 35.0 6 W 23 12 4.4 32.0 18 ESE --------------------------------- 4.2 44.0 APR W