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 ------------------------------------------------------------------------------------ 15 1 28.1 11.7 21.0 0.0 1363 0 41.3 17 -16.1 6 0 16 31 9 15 2 21.8 -2.0 12.0 0.0 1485 0 43.5 7 -23.0 28 0 24 28 16 15 3 45.1 21.0 33.6 0.0 975 1 73.8 16 -18.1 6 0 5 25 2 15 4 62.6 34.4 48.9 0.0 498 16 78.6 17 21.1 24 0 0 13 0 15 5 70.8 49.9 60.7 0.0 209 75 83.6 7 28.6 1 0 0 1 0 15 6 78.4 57.7 68.1 0.0 63 157 89.9 9 38.5 2 0 0 0 0 15 7 81.0 58.3 70.5 0.0 58 228 89.9 18 45.1 2 0 0 0 0 15 8 80.3 56.6 68.8 0.0 70 188 91.4 14 45.2 27 3 0 0 0 15 9 79.3 54.4 66.4 0.0 124 165 91.3 6 38.2 13 2 0 0 0 15 10 63.9 40.8 52.4 0.0 411 20 80.9 11 23.0 18 0 0 6 0 15 11 52.3 31.8 41.9 0.0 699 5 73.3 4 -1.2 22 0 2 14 1 15 12 42.4 31.2 36.8 0.0 874 0 61.4 13 10.9 19 0 5 17 0 ------------------------------------------------------------------------------------ 59.0 37.4 48.6 0.0 6829 856 91.4 AUG -23.0 FEB 5 52 135 28 PRECIPITATION (in) DEP. MAX DAYS OF RAIN FROM OBS. OVER YR MO TOTAL NORM DAY DATE .01 .1 1 --------------------------------------------- 15 1 0.28 0.00 0.06 16 6 0 0 15 2 0.30 0.00 0.14 7 3 1 0 15 3 1.00 0.00 0.37 23 8 4 0 15 4 1.18 0.00 0.36 9 7 5 0 15 5 4.80 0.00 1.10 5 17 10 1 15 6 5.33 0.00 1.13 15 12 9 1 15 7 2.01 0.00 0.70 13 6 3 0 15 8 2.09 0.00 0.71 18 7 5 0 15 9 3.22 0.00 0.96 17 8 5 0 15 10 2.20 0.00 0.72 27 7 4 0 15 11 5.22 0.00 1.63 26 11 8 2 15 12 3.48 0.00 1.47 13 11 5 1 --------------------------------------------- 31.11 0.00 1.63 NOV 103 59 5 WIND SPEED (mph) DOM YR MO AVG. HI DATE DIR --------------------------------- 15 1 5.2 32.0 25 W 15 2 6.1 39.0 1 WNW 15 3 4.8 33.0 17 W 15 4 6.1 39.0 21 W 15 5 4.8 32.0 30 SSW 15 6 3.4 26.0 8 ENE 15 7 2.5 48.0 13 W 15 8 2.7 31.0 18 W 15 9 2.6 29.0 17 SSW 15 10 4.7 34.0 15 W 15 11 5.7 45.0 12 W 15 12 5.9 43.0 23 W --------------------------------- 4.5 48.0 JUL W