ANNUAL CLIMATOLOGICAL SUMMARY NAME: Hawkeye Observatory CITY: Durand STATE: Illinois ELEV: 758 ft LAT: 42° 24' 00" N LONG: 89° 18' 00" 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 ------------------------------------------------------------------------------------ 12 1 36.1 15.6 26.4 0.0 1197 0 55.0 6 -6.0 19 0 10 29 3 12 2 37.8 20.6 29.9 0.0 1018 0 49.4 29 5.6 25 0 2 28 0 12 3 61.7 40.2 51.5 0.0 468 49 83.3 21 9.5 5 0 2 7 0 12 4 60.3 36.6 48.7 0.0 493 5 72.5 15 24.3 12 0 0 8 0 12 5 76.8 51.3 64.8 0.0 153 146 95.9 27 36.6 10 3 0 0 0 12 6 84.8 56.4 72.1 0.0 72 285 96.3 28 41.5 26 9 0 0 0 12 7 91.8 64.5 78.4 0.0 13 430 102.7 6 50.8 11 18 0 0 0 12 8 83.9 54.5 69.6 0.0 89 232 95.6 3 41.7 18 10 0 0 0 12 9 75.3 44.8 59.6 0.0 268 108 94.2 4 27.6 24 2 0 3 0 12 10 59.8 36.1 48.2 0.0 533 13 78.8 24 23.4 8 0 0 11 0 12 11 48.5 27.1 38.0 0.0 811 0 66.8 10 8.5 27 0 0 22 0 12 12 38.9 24.2 32.1 0.0 1021 0 67.9 3 4.3 22 0 9 24 0 ------------------------------------------------------------------------------------ 63.1 39.4 51.7 0.0 6136 1267 102.7 JUL -6.0 JAN 42 23 132 3 PRECIPITATION (in) DEP. MAX DAYS OF RAIN FROM OBS. OVER YR MO TOTAL NORM DAY DATE .01 .1 1 --------------------------------------------- 12 1 0.44 0.00 0.15 23 4 3 0 12 2 0.98 0.00 0.22 29 6 5 0 12 3 2.58 0.00 0.83 23 13 6 0 12 4 2.77 0.00 1.39 15 9 6 1 12 5 1.84 0.00 0.81 26 9 2 0 12 6 0.51 0.00 0.31 16 4 1 0 12 7 2.67 0.00 1.20 18 8 4 1 12 8 1.25 0.00 0.56 26 5 4 0 12 9 1.78 0.00 0.62 17 9 5 0 12 10 2.94 0.00 0.89 22 10 6 0 12 11 1.06 0.00 0.83 11 3 2 0 12 12 2.43 0.00 1.35 20 7 3 1 --------------------------------------------- 21.25 0.00 1.39 APR 87 47 3 WIND SPEED (mph) DOM YR MO AVG. HI DATE DIR --------------------------------- 12 1 5.7 39.0 1 W 12 2 5.7 34.0 10 W 12 3 5.8 40.0 7 SSW 12 4 6.0 38.0 16 ENE 12 5 4.9 40.0 24 ENE 12 6 3.9 34.0 20 SSW 12 7 2.7 58.0 18 SSW 12 8 2.4 27.0 10 SSW 12 9 3.5 46.0 17 NW 12 10 5.2 32.0 8 SSW 12 11 4.0 41.0 22 SSW 12 12 5.5 39.0 20 SSW --------------------------------- 4.6 58.0 JUL SSW