Weather World
Williamson Mound State Memorial Monthly Climate Averages
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 34°F Lo 22°F | Hi 39°F Lo 25°F | Hi 51°F Lo 34°F | Hi 61°F Lo 44°F | Hi 71°F Lo 54°F | Hi 79°F Lo 62°F | Hi 82°F Lo 65°F | Hi 81°F Lo 63°F | Hi 76°F Lo 58°F | Hi 64°F Lo 47°F | Hi 51°F Lo 36°F | Hi 41°F Lo 29°F |
| 10 mph | 10 mph | 10 mph | 10 mph | 8 mph | 7 mph | 6 mph | 6 mph | 7 mph | 9 mph | 9 mph | 10 mph |
| 3.3 in | 3.9 in | 5.7 in | 6.1 in | 6.1 in | 6 in | 5.4 in | 3.1 in | 4.2 in | 3.6 in | 4 in | 5 in |
| 82% | 81% | 76% | 76% | 79% | 79% | 81% | 79% | 75% | 73% | 74% | 81% |
| 62% | 59% | 52% | 49% | 45% | 36% | 35% | 33% | 33% | 38% | 43% | 59% |
| 30.1 in | 30.1 in | 30.1 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 |
| 18 | 17 | 21 | 20 | 21 | 20 | 22 | 23 | 24 | 25 | 23 | 20 |
| 9 | 8 | 8 | 9 | 10 | 10 | 9 | 8 | 6 | 6 | 6 | 8 |
| 5 | 4 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 3 |
| 1 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 1 | 2 | 2 | 4 | 5 | 5 | 5 | 5 | 4 | 3 | 2 | 1 |
| 99 | 103 | 141 | 147 | 161 | 193 | 200 | 224 | 219 | 191 | 181 | 115 |
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 1°C Lo -6°C | Hi 4°C Lo -4°C | Hi 11°C Lo 1°C | Hi 16°C Lo 6°C | Hi 22°C Lo 12°C | Hi 26°C Lo 17°C | Hi 28°C Lo 19°C | Hi 27°C Lo 17°C | Hi 25°C Lo 14°C | Hi 18°C Lo 8°C | Hi 10°C Lo 2°C | Hi 5°C Lo -2°C |
| 17 km/h | 16 km/h | 17 km/h | 16 km/h | 13 km/h | 12 km/h | 10 km/h | 10 km/h | 11 km/h | 14 km/h | 15 km/h | 15 km/h |
| 85 mm | 99 mm | 144 mm | 155 mm | 155 mm | 153 mm | 137 mm | 79 mm | 107 mm | 91 mm | 103 mm | 128 mm |
| 82% | 81% | 76% | 76% | 79% | 79% | 81% | 79% | 75% | 73% | 74% | 81% |
| 62% | 59% | 52% | 49% | 45% | 36% | 35% | 33% | 33% | 38% | 43% | 59% |
| 1020 mb | 1020 mb | 1018 mb | 1015 mb | 1015 mb | 1014 mb | 1015 mb | 1016 mb | 1017 mb | 1017 mb | 1020 mb | 1020 mb |
| 18 | 17 | 21 | 20 | 21 | 20 | 22 | 23 | 24 | 25 | 23 | 20 |
| 9 | 8 | 8 | 9 | 10 | 10 | 9 | 8 | 6 | 6 | 6 | 8 |
| 5 | 4 | 2 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 3 |
| 1 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 1 | 2 | 2 | 4 | 5 | 5 | 5 | 5 | 4 | 3 | 2 | 1 |
| 99 | 103 | 141 | 147 | 161 | 193 | 200 | 224 | 219 | 191 | 181 | 115 |
| 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.