Weather World
Fort Chartres State Park Monthly Climate Averages
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 40°F Lo 26°F | Hi 45°F Lo 29°F | Hi 57°F Lo 40°F | Hi 66°F Lo 48°F | Hi 75°F Lo 58°F | Hi 86°F Lo 67°F | Hi 89°F Lo 70°F | Hi 87°F Lo 68°F | Hi 81°F Lo 61°F | Hi 69°F Lo 50°F | Hi 55°F Lo 39°F | Hi 46°F Lo 32°F |
| 9 mph | 9 mph | 9 mph | 9 mph | 7 mph | 7 mph | 6 mph | 6 mph | 6 mph | 8 mph | 8 mph | 9 mph |
| 3.5 in | 3.4 in | 5.1 in | 7.7 in | 7.1 in | 5.2 in | 5.1 in | 4.3 in | 3.7 in | 4.7 in | 3.8 in | 3.7 in |
| 74% | 76% | 75% | 75% | 79% | 75% | 75% | 74% | 71% | 68% | 71% | 74% |
| 49% | 50% | 48% | 44% | 42% | 30% | 31% | 30% | 31% | 33% | 36% | 48% |
| 30.2 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 |
| 22 | 19 | 23 | 22 | 21 | 22 | 22 | 23 | 24 | 25 | 24 | 24 |
| 6 | 6 | 8 | 8 | 10 | 8 | 9 | 8 | 6 | 6 | 6 | 6 |
| 3 | 3 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 |
| 1 | 1 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 2 | 2 | 3 | 4 | 5 | 6 | 6 | 5 | 5 | 3 | 2 | 2 |
| 166 | 145 | 155 | 170 | 175 | 221 | 222 | 246 | 229 | 220 | 211 | 168 |
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 5°C Lo -3°C | Hi 7°C Lo -2°C | Hi 14°C Lo 4°C | Hi 19°C Lo 9°C | Hi 24°C Lo 14°C | Hi 30°C Lo 19°C | Hi 32°C Lo 21°C | Hi 31°C Lo 20°C | Hi 27°C Lo 16°C | Hi 21°C Lo 10°C | Hi 13°C Lo 4°C | Hi 8°C Lo 0°C |
| 14 km/h | 14 km/h | 15 km/h | 15 km/h | 12 km/h | 11 km/h | 9 km/h | 9 km/h | 10 km/h | 13 km/h | 14 km/h | 14 km/h |
| 88 mm | 87 mm | 130 mm | 196 mm | 180 mm | 132 mm | 130 mm | 108 mm | 93 mm | 118 mm | 98 mm | 94 mm |
| 74% | 76% | 75% | 75% | 79% | 75% | 75% | 74% | 71% | 68% | 71% | 74% |
| 49% | 50% | 48% | 44% | 42% | 30% | 31% | 30% | 31% | 33% | 36% | 48% |
| 1021 mb | 1020 mb | 1018 mb | 1015 mb | 1015 mb | 1014 mb | 1015 mb | 1015 mb | 1016 mb | 1017 mb | 1020 mb | 1020 mb |
| 22 | 19 | 23 | 22 | 21 | 22 | 22 | 23 | 24 | 25 | 24 | 24 |
| 6 | 6 | 8 | 8 | 10 | 8 | 9 | 8 | 6 | 6 | 6 | 6 |
| 3 | 3 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 |
| 1 | 1 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| 2 | 2 | 3 | 4 | 5 | 6 | 6 | 5 | 5 | 3 | 2 | 2 |
| 166 | 145 | 155 | 170 | 175 | 221 | 222 | 246 | 229 | 220 | 211 | 168 |
| 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.