Weather World
De Kalb Monthly Climate Averages
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 54°F Lo 38°F | Hi 60°F Lo 42°F | Hi 68°F Lo 49°F | Hi 76°F Lo 55°F | Hi 83°F Lo 63°F | Hi 90°F Lo 70°F | Hi 92°F Lo 73°F | Hi 92°F Lo 72°F | Hi 87°F Lo 68°F | Hi 78°F Lo 57°F | Hi 65°F Lo 47°F | Hi 58°F Lo 43°F |
| 7 mph | 7 mph | 7 mph | 7 mph | 6 mph | 5 mph | 5 mph | 5 mph | 5 mph | 6 mph | 6 mph | 7 mph |
| 5.3 in | 5.7 in | 6.7 in | 6.1 in | 5.5 in | 4.8 in | 4.6 in | 4.6 in | 3.9 in | 3.6 in | 3.6 in | 5.9 in |
| 75% | 78% | 76% | 73% | 74% | 72% | 73% | 72% | 71% | 68% | 73% | 79% |
| 44% | 49% | 46% | 38% | 39% | 36% | 39% | 36% | 33% | 29% | 36% | 48% |
| 30.2 in | 30.1 in | 30.1 in | 30.0 in | 30.0 in | 30.0 in | 30.0 in | 30.0 in | 30.0 in | 30.0 in | 30.1 in | 30.1 in |
| 23 | 21 | 23 | 24 | 22 | 19 | 16 | 18 | 23 | 27 | 25 | 24 |
| 7 | 6 | 8 | 7 | 9 | 11 | 15 | 13 | 8 | 4 | 5 | 7 |
| 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 1 |
| 3 | 4 | 4 | 5 | 6 | 6 | 6 | 6 | 5 | 4 | 3 | 3 |
| 188 | 153 | 168 | 206 | 208 | 207 | 182 | 203 | 216 | 232 | 205 | 164 |
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 12°C Lo 3°C | Hi 16°C Lo 6°C | Hi 20°C Lo 10°C | Hi 24°C Lo 13°C | Hi 29°C Lo 17°C | Hi 32°C Lo 21°C | Hi 33°C Lo 23°C | Hi 33°C Lo 22°C | Hi 31°C Lo 20°C | Hi 25°C Lo 14°C | Hi 19°C Lo 8°C | Hi 15°C Lo 6°C |
| 12 km/h | 12 km/h | 12 km/h | 12 km/h | 9 km/h | 8 km/h | 8 km/h | 8 km/h | 8 km/h | 10 km/h | 10 km/h | 11 km/h |
| 135 mm | 146 mm | 170 mm | 154 mm | 141 mm | 122 mm | 116 mm | 117 mm | 98 mm | 91 mm | 92 mm | 151 mm |
| 75% | 78% | 76% | 73% | 74% | 72% | 73% | 72% | 71% | 68% | 73% | 79% |
| 44% | 49% | 46% | 38% | 39% | 36% | 39% | 36% | 33% | 29% | 36% | 48% |
| 1022 mb | 1020 mb | 1019 mb | 1016 mb | 1016 mb | 1015 mb | 1016 mb | 1015 mb | 1015 mb | 1017 mb | 1021 mb | 1021 mb |
| 23 | 21 | 23 | 24 | 22 | 19 | 16 | 18 | 23 | 27 | 25 | 24 |
| 7 | 6 | 8 | 7 | 9 | 11 | 15 | 13 | 8 | 4 | 5 | 7 |
| 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 1 |
| 3 | 4 | 4 | 5 | 6 | 6 | 6 | 6 | 5 | 4 | 3 | 3 |
| 188 | 153 | 168 | 206 | 208 | 207 | 182 | 203 | 216 | 232 | 205 | 164 |
| Month |
| Avg. Temperatures |
| Avg. Wind Speed |
| Avg. Precipitation |
| Average Humidity |
| Avg. Cloud Cover |
| Pressure Average |
| Average Dry Days |
| Avg. Precip. Days |
| Avg. Snow Days |
| Average Fog Days |
| Average UV Index |
| Avg. Hours of Sun |
Averages are based on historical weather data from the past 10 years.