Weather World
McLean County, IL Official Site
McLean County Monthly Climate Averages
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 32°F Lo 19°F | Hi 37°F Lo 23°F | Hi 50°F Lo 34°F | Hi 60°F Lo 43°F | Hi 71°F Lo 55°F | Hi 80°F Lo 63°F | Hi 82°F Lo 66°F | Hi 81°F Lo 64°F | Hi 77°F Lo 58°F | Hi 64°F Lo 47°F | Hi 50°F Lo 36°F | Hi 39°F Lo 27°F |
| 11 mph | 11 mph | 11 mph | 11 mph | 9 mph | 8 mph | 7 mph | 7 mph | 8 mph | 10 mph | 11 mph | 10 mph |
| 2.4 in | 2.6 in | 4.4 in | 6.3 in | 6.5 in | 5.7 in | 5.7 in | 3.9 in | 3.3 in | 4.1 in | 3.2 in | 2.9 in |
| 80% | 79% | 74% | 74% | 76% | 79% | 84% | 81% | 73% | 69% | 72% | 78% |
| 60% | 56% | 52% | 50% | 46% | 36% | 37% | 34% | 32% | 39% | 42% | 56% |
| 30.1 in | 30.1 in | 30.0 in | 30.0 in | 30.0 in | 29.9 in | 30.0 in | 30.0 in | 30.0 in | 30.0 in | 30.1 in | 30.1 in |
| 19 | 18 | 21 | 21 | 20 | 20 | 22 | 24 | 24 | 24 | 23 | 22 |
| 7 | 6 | 8 | 8 | 11 | 10 | 9 | 7 | 6 | 7 | 6 | 7 |
| 5 | 4 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 |
| 1 | 1 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 0 | 1 | 1 |
| 1 | 2 | 2 | 4 | 5 | 5 | 5 | 5 | 4 | 2 | 1 | 1 |
| 117 | 124 | 149 | 146 | 169 | 208 | 207 | 224 | 231 | 191 | 181 | 133 |
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi -0°C Lo -7°C | Hi 3°C Lo -5°C | Hi 10°C Lo 1°C | Hi 16°C Lo 6°C | Hi 22°C Lo 13°C | Hi 27°C Lo 17°C | Hi 28°C Lo 19°C | Hi 27°C Lo 18°C | Hi 25°C Lo 14°C | Hi 18°C Lo 9°C | Hi 10°C Lo 2°C | Hi 4°C Lo -3°C |
| 17 km/h | 17 km/h | 18 km/h | 18 km/h | 15 km/h | 13 km/h | 11 km/h | 11 km/h | 13 km/h | 16 km/h | 17 km/h | 17 km/h |
| 62 mm | 65 mm | 111 mm | 160 mm | 166 mm | 146 mm | 146 mm | 99 mm | 83 mm | 105 mm | 82 mm | 74 mm |
| 80% | 79% | 74% | 74% | 76% | 79% | 84% | 81% | 73% | 69% | 72% | 78% |
| 60% | 56% | 52% | 50% | 46% | 36% | 37% | 34% | 32% | 39% | 42% | 56% |
| 1020 mb | 1020 mb | 1018 mb | 1014 mb | 1015 mb | 1013 mb | 1015 mb | 1015 mb | 1017 mb | 1017 mb | 1020 mb | 1019 mb |
| 19 | 18 | 21 | 21 | 20 | 20 | 22 | 24 | 24 | 24 | 23 | 22 |
| 7 | 6 | 8 | 8 | 11 | 10 | 9 | 7 | 6 | 7 | 6 | 7 |
| 5 | 4 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 |
| 1 | 1 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 0 | 1 | 1 |
| 1 | 2 | 2 | 4 | 5 | 5 | 5 | 5 | 4 | 2 | 1 | 1 |
| 117 | 124 | 149 | 146 | 169 | 208 | 207 | 224 | 231 | 191 | 181 | 133 |
| 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.