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 ------------------------------------------------------------------------------------ 17 1 31.4 19.9 26.0 0.0 1208 0 52.4 21 -2.8 8 0 12 22 3 17 2 45.1 23.7 34.9 0.0 844 1 69.4 22 8.4 4 0 5 23 0 17 3 45.8 27.6 36.7 0.0 877 2 75.6 24 6.4 14 0 5 20 0 17 4 62.5 39.9 51.8 0.0 421 24 79.9 15 27.5 1 0 0 4 0 17 5 68.1 46.6 57.0 0.0 296 49 85.7 16 30.6 3 0 0 1 0 17 6 81.4 58.2 70.3 0.0 62 223 92.0 14 44.4 27 4 0 0 0 17 7 82.2 60.3 71.7 0.0 39 245 89.6 6 51.5 30 0 0 0 0 17 8 77.6 54.6 66.3 0.0 97 137 86.6 16 42.1 25 0 0 0 0 17 9 79.1 49.6 64.2 0.0 170 144 94.0 23 36.6 30 5 0 0 0 17 10 63.1 45.1 53.9 0.0 329 37 82.9 2 24.3 29 0 0 2 0 17 11 45.3 27.2 37.2 0.0 834 0 65.2 24 12.4 10 0 1 20 0 17 12 28.8 10.5 20.2 0.0 906 0 63.2 4 -12.9 27 0 11 20 6 ------------------------------------------------------------------------------------ 60.1 39.4 50.0 0.0 6082 862 94.0 SEP -12.9 DEC 9 34 112 9 PRECIPITATION (in) DEP. MAX DAYS OF RAIN FROM OBS. OVER YR MO TOTAL NORM DAY DATE .01 .1 1 --------------------------------------------- 17 1 2.14 0.00 0.74 16 9 4 0 17 2 1.18 0.00 0.34 24 6 5 0 17 3 2.32 0.00 0.89 30 13 7 0 17 4 5.44 0.00 0.80 27 15 13 0 17 5 5.16 0.00 0.67 17 16 11 0 17 6 3.48 0.00 1.09 28 10 8 1 17 7 3.80 0.00 1.86 21 4 3 2 17 8 1.54 0.00 0.83 16 7 4 0 17 9 0.16 0.00 0.12 2 3 1 0 17 10 5.68 0.00 1.60 11 12 8 1 17 11 1.11 0.00 0.27 4 7 6 0 17 12 0.13 0.00 0.13 4 1 1 0 --------------------------------------------- 32.14 0.00 1.86 JUL 103 71 4 WIND SPEED (mph) DOM YR MO AVG. HI DATE DIR --------------------------------- 17 1 5.5 39.0 10 WNW 17 2 5.6 34.0 12 WNW 17 3 7.3 45.0 8 ENE 17 4 6.1 38.0 29 ENE 17 5 4.7 48.0 17 W 17 6 3.7 34.0 28 W 17 7 2.1 45.0 19 ENE 17 8 2.0 28.0 17 W 17 9 1.8 25.0 29 SSW 17 10 4.1 31.0 15 S 17 11 4.7 32.0 15 SSW 17 12 6.0 44.0 5 W --------------------------------- 4.4 48.0 MAY W