Weather World
Charlestown School Monthly Climate Averages
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 37°F Lo 27°F | Hi 39°F Lo 27°F | Hi 44°F Lo 34°F | Hi 53°F Lo 42°F | Hi 62°F Lo 51°F | Hi 71°F Lo 59°F | Hi 78°F Lo 67°F | Hi 77°F Lo 66°F | Hi 71°F Lo 60°F | Hi 62°F Lo 52°F | Hi 51°F Lo 41°F | Hi 43°F Lo 34°F |
| 12 mph | 12 mph | 12 mph | 11 mph | 10 mph | 9 mph | 9 mph | 8 mph | 9 mph | 11 mph | 12 mph | 12 mph |
| 4.7 in | 4.9 in | 6.1 in | 5 in | 4.6 in | 4.5 in | 4.3 in | 4.7 in | 4 in | 5.5 in | 4.7 in | 6.8 in |
| 74% | 76% | 74% | 74% | 79% | 81% | 81% | 78% | 78% | 76% | 73% | 75% |
| 46% | 48% | 49% | 48% | 46% | 40% | 37% | 34% | 37% | 43% | 38% | 47% |
| 30.0 in | 30.0 in | 30.0 in | 30.0 in | 30.0 in | 29.9 in | 30.0 in | 30.0 in | 30.1 in | 30.0 in | 30.1 in | 30.0 in |
| 21 | 17 | 22 | 23 | 24 | 23 | 24 | 24 | 24 | 24 | 24 | 22 |
| 7 | 8 | 7 | 7 | 7 | 7 | 7 | 7 | 6 | 7 | 6 | 7 |
| 3 | 4 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| 1 | 0 | 1 | 0 | 1 | 1 | 1 | 1 | 2 | 1 | 0 | 0 |
| 1 | 1 | 2 | 3 | 4 | 5 | 6 | 5 | 4 | 3 | 2 | 2 |
| 175 | 153 | 161 | 162 | 171 | 187 | 209 | 232 | 207 | 184 | 202 | 174 |
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 3°C Lo -3°C | Hi 4°C Lo -3°C | Hi 7°C Lo 1°C | Hi 12°C Lo 6°C | Hi 17°C Lo 11°C | Hi 22°C Lo 15°C | Hi 26°C Lo 20°C | Hi 25°C Lo 19°C | Hi 22°C Lo 16°C | Hi 17°C Lo 11°C | Hi 11°C Lo 5°C | Hi 6°C Lo 1°C |
| 20 km/h | 19 km/h | 19 km/h | 18 km/h | 16 km/h | 15 km/h | 14 km/h | 14 km/h | 15 km/h | 17 km/h | 19 km/h | 19 km/h |
| 119 mm | 125 mm | 155 mm | 126 mm | 116 mm | 115 mm | 110 mm | 118 mm | 102 mm | 139 mm | 120 mm | 172 mm |
| 74% | 76% | 74% | 74% | 79% | 81% | 81% | 78% | 78% | 76% | 73% | 75% |
| 46% | 48% | 49% | 48% | 46% | 40% | 37% | 34% | 37% | 43% | 38% | 47% |
| 1016 mb | 1016 mb | 1017 mb | 1016 mb | 1016 mb | 1014 mb | 1014 mb | 1016 mb | 1018 mb | 1017 mb | 1018 mb | 1018 mb |
| 21 | 17 | 22 | 23 | 24 | 23 | 24 | 24 | 24 | 24 | 24 | 22 |
| 7 | 8 | 7 | 7 | 7 | 7 | 7 | 7 | 6 | 7 | 6 | 7 |
| 3 | 4 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| 1 | 0 | 1 | 0 | 1 | 1 | 1 | 1 | 2 | 1 | 0 | 0 |
| 1 | 1 | 2 | 3 | 4 | 5 | 6 | 5 | 4 | 3 | 2 | 2 |
| 175 | 153 | 161 | 162 | 171 | 187 | 209 | 232 | 207 | 184 | 202 | 174 |
| 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.