WeatherWorld.comWest Chatham Monthly Climate Averages
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 40°F Lo 32°F | Hi 39°F Lo 31°F | Hi 42°F Lo 36°F | Hi 48°F Lo 43°F | Hi 56°F Lo 51°F | Hi 64°F Lo 60°F | Hi 72°F Lo 68°F | Hi 73°F Lo 68°F | Hi 68°F Lo 63°F | Hi 61°F Lo 55°F | Hi 52°F Lo 45°F | Hi 45°F Lo 38°F |
| 18 mph | 18 mph | 18 mph | 15 mph | 13 mph | 13 mph | 12 mph | 12 mph | 13 mph | 16 mph | 17 mph | 18 mph |
| 5 in | 4.7 in | 4.8 in | 4.2 in | 3.8 in | 3.7 in | 3.4 in | 3.9 in | 4.5 in | 6.1 in | 4.3 in | 5.3 in |
| 75% | 76% | 76% | 79% | 83% | 83% | 84% | 82% | 79% | 77% | 73% | 75% |
| 54% | 55% | 51% | 47% | 44% | 38% | 34% | 31% | 34% | 43% | 43% | 54% |
| 30.0 in | 30.0 in | 30.0 in | 30.0 in | 30.0 in | 29.9 in | 30.0 in | 30.0 in | 30.0 in | 30.0 in | 30.1 in | 30.0 in |
| 19 | 17 | 21 | 23 | 25 | 23 | 25 | 25 | 24 | 23 | 23 | 21 |
| 9 | 8 | 9 | 7 | 6 | 7 | 6 | 6 | 6 | 8 | 7 | 9 |
| 3 | 3 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1 | 2 | 2 | 3 | 4 | 5 | 5 | 5 | 4 | 3 | 2 | 2 |
| 143 | 127 | 156 | 167 | 184 | 208 | 237 | 249 | 219 | 192 | 178 | 139 |
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 4°C Lo -0°C | Hi 4°C Lo -0°C | Hi 6°C Lo 2°C | Hi 9°C Lo 6°C | Hi 13°C Lo 10°C | Hi 18°C Lo 15°C | Hi 22°C Lo 20°C | Hi 23°C Lo 20°C | Hi 20°C Lo 17°C | Hi 16°C Lo 13°C | Hi 11°C Lo 7°C | Hi 7°C Lo 3°C |
| 29 km/h | 28 km/h | 28 km/h | 24 km/h | 22 km/h | 20 km/h | 19 km/h | 19 km/h | 22 km/h | 25 km/h | 28 km/h | 29 km/h |
| 126 mm | 119 mm | 121 mm | 105 mm | 97 mm | 95 mm | 86 mm | 98 mm | 113 mm | 156 mm | 110 mm | 136 mm |
| 75% | 76% | 76% | 79% | 83% | 83% | 84% | 82% | 79% | 77% | 73% | 75% |
| 54% | 55% | 51% | 47% | 44% | 38% | 34% | 31% | 34% | 43% | 43% | 54% |
| 1016 mb | 1016 mb | 1016 mb | 1015 mb | 1017 mb | 1014 mb | 1014 mb | 1015 mb | 1017 mb | 1016 mb | 1018 mb | 1017 mb |
| 19 | 17 | 21 | 23 | 25 | 23 | 25 | 25 | 24 | 23 | 23 | 21 |
| 9 | 8 | 9 | 7 | 6 | 7 | 6 | 6 | 6 | 8 | 7 | 9 |
| 3 | 3 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1 | 2 | 2 | 3 | 4 | 5 | 5 | 5 | 4 | 3 | 2 | 2 |
| 143 | 127 | 156 | 167 | 184 | 208 | 237 | 249 | 219 | 192 | 178 | 139 |
| 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.