Weather World
City of St. Clair, MO
St. Clair Monthly Climate Averages
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 39°F Lo 25°F | Hi 44°F Lo 28°F | Hi 57°F Lo 39°F | Hi 66°F Lo 47°F | Hi 75°F Lo 56°F | Hi 86°F Lo 66°F | Hi 89°F Lo 69°F | Hi 88°F Lo 67°F | Hi 81°F Lo 60°F | Hi 68°F Lo 50°F | Hi 55°F Lo 38°F | Hi 45°F Lo 31°F |
| 8 mph | 8 mph | 9 mph | 8 mph | 7 mph | 6 mph | 5 mph | 6 mph | 6 mph | 8 mph | 8 mph | 8 mph |
| 2.7 in | 3 in | 4.6 in | 6.8 in | 6.9 in | 4.7 in | 5.1 in | 4.5 in | 4.6 in | 4.2 in | 3.6 in | 2.9 in |
| 75% | 75% | 74% | 74% | 78% | 74% | 73% | 72% | 71% | 68% | 71% | 74% |
| 50% | 49% | 48% | 44% | 42% | 31% | 32% | 31% | 30% | 33% | 37% | 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 | 21 | 21 | 21 | 23 | 24 | 25 | 25 | 24 | 25 |
| 6 | 6 | 8 | 9 | 10 | 9 | 8 | 8 | 5 | 6 | 5 | 5 |
| 3 | 3 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 |
| 1 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 1 |
| 2 | 2 | 3 | 4 | 5 | 6 | 6 | 5 | 5 | 3 | 2 | 2 |
| 163 | 148 | 162 | 169 | 177 | 216 | 219 | 221 | 232 | 214 | 206 | 169 |
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 4°C Lo -4°C | Hi 7°C Lo -2°C | Hi 14°C Lo 4°C | Hi 19°C Lo 8°C | Hi 24°C Lo 13°C | Hi 30°C Lo 19°C | Hi 32°C Lo 21°C | Hi 31°C Lo 19°C | Hi 27°C Lo 16°C | Hi 20°C Lo 10°C | Hi 13°C Lo 4°C | Hi 7°C Lo -1°C |
| 13 km/h | 13 km/h | 14 km/h | 13 km/h | 11 km/h | 10 km/h | 9 km/h | 9 km/h | 9 km/h | 12 km/h | 13 km/h | 13 km/h |
| 68 mm | 77 mm | 117 mm | 173 mm | 175 mm | 119 mm | 129 mm | 115 mm | 117 mm | 106 mm | 92 mm | 72 mm |
| 75% | 75% | 74% | 74% | 78% | 74% | 73% | 72% | 71% | 68% | 71% | 74% |
| 50% | 49% | 48% | 44% | 42% | 31% | 32% | 31% | 30% | 33% | 37% | 48% |
| 1021 mb | 1020 mb | 1017 mb | 1014 mb | 1014 mb | 1013 mb | 1015 mb | 1015 mb | 1016 mb | 1017 mb | 1020 mb | 1020 mb |
| 22 | 19 | 23 | 21 | 21 | 21 | 23 | 24 | 25 | 25 | 24 | 25 |
| 6 | 6 | 8 | 9 | 10 | 9 | 8 | 8 | 5 | 6 | 5 | 5 |
| 3 | 3 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 |
| 1 | 1 | 1 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 1 | 1 |
| 2 | 2 | 3 | 4 | 5 | 6 | 6 | 5 | 5 | 3 | 2 | 2 |
| 163 | 148 | 162 | 169 | 177 | 216 | 219 | 221 | 232 | 214 | 206 | 169 |
| 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.