Weather World
McLean Monthly Climate Averages
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 50°F Lo 31°F | Hi 54°F Lo 34°F | Hi 66°F Lo 44°F | Hi 73°F Lo 50°F | Hi 81°F Lo 59°F | Hi 91°F Lo 70°F | Hi 94°F Lo 73°F | Hi 94°F Lo 73°F | Hi 86°F Lo 66°F | Hi 74°F Lo 53°F | Hi 62°F Lo 42°F | Hi 52°F Lo 34°F |
| 11 mph | 12 mph | 13 mph | 14 mph | 12 mph | 12 mph | 11 mph | 10 mph | 11 mph | 12 mph | 12 mph | 11 mph |
| 0.9 in | 1 in | 1.5 in | 3.3 in | 4.6 in | 3.6 in | 2.6 in | 2.3 in | 2.3 in | 2.6 in | 1.9 in | 1.2 in |
| 53% | 54% | 49% | 50% | 55% | 54% | 49% | 47% | 54% | 52% | 54% | 54% |
| 24% | 27% | 26% | 28% | 29% | 22% | 21% | 19% | 22% | 20% | 22% | 24% |
| 30.1 in | 30.1 in | 30.0 in | 29.9 in | 29.9 in | 29.8 in | 29.9 in | 29.9 in | 29.9 in | 29.9 in | 30.1 in | 30.1 in |
| 28 | 25 | 28 | 25 | 24 | 25 | 26 | 26 | 25 | 27 | 27 | 28 |
| 2 | 2 | 3 | 5 | 7 | 5 | 5 | 5 | 5 | 4 | 2 | 2 |
| 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 |
| 2 | 3 | 4 | 5 | 6 | 7 | 7 | 6 | 5 | 4 | 3 | 2 |
| 269 | 235 | 260 | 248 | 233 | 266 | 281 | 288 | 278 | 274 | 276 | 278 |
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 10°C Lo -0°C | Hi 12°C Lo 1°C | Hi 19°C Lo 6°C | Hi 23°C Lo 10°C | Hi 27°C Lo 15°C | Hi 33°C Lo 21°C | Hi 35°C Lo 23°C | Hi 35°C Lo 23°C | Hi 30°C Lo 19°C | Hi 23°C Lo 12°C | Hi 17°C Lo 6°C | Hi 11°C Lo 1°C |
| 17 km/h | 19 km/h | 21 km/h | 22 km/h | 20 km/h | 20 km/h | 17 km/h | 16 km/h | 17 km/h | 19 km/h | 19 km/h | 18 km/h |
| 23 mm | 25 mm | 39 mm | 83 mm | 117 mm | 92 mm | 65 mm | 59 mm | 59 mm | 67 mm | 47 mm | 30 mm |
| 53% | 54% | 49% | 50% | 55% | 54% | 49% | 47% | 54% | 52% | 54% | 54% |
| 24% | 27% | 26% | 28% | 29% | 22% | 21% | 19% | 22% | 20% | 22% | 24% |
| 1021 mb | 1019 mb | 1015 mb | 1012 mb | 1011 mb | 1011 mb | 1013 mb | 1013 mb | 1014 mb | 1014 mb | 1018 mb | 1019 mb |
| 28 | 25 | 28 | 25 | 24 | 25 | 26 | 26 | 25 | 27 | 27 | 28 |
| 2 | 2 | 3 | 5 | 7 | 5 | 5 | 5 | 5 | 4 | 2 | 2 |
| 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 |
| 2 | 3 | 4 | 5 | 6 | 7 | 7 | 6 | 5 | 4 | 3 | 2 |
| 269 | 235 | 260 | 248 | 233 | 266 | 281 | 288 | 278 | 274 | 276 | 278 |
| 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.