WeatherWX.com
Old Chatham Monthly Climate Averages
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 31°F Lo 18°F | Hi 34°F Lo 18°F | Hi 43°F Lo 26°F | Hi 55°F Lo 36°F | Hi 67°F Lo 48°F | Hi 76°F Lo 55°F | Hi 82°F Lo 62°F | Hi 81°F Lo 61°F | Hi 73°F Lo 54°F | Hi 60°F Lo 44°F | Hi 47°F Lo 32°F | Hi 37°F Lo 25°F |
| 8 mph | 8 mph | 8 mph | 8 mph | 6 mph | 6 mph | 5 mph | 5 mph | 6 mph | 6 mph | 7 mph | 7 mph |
| 0.9 in | 1.1 in | 1.2 in | 1.4 in | 1.3 in | 1.4 in | 1.3 in | 1.5 in | 1.4 in | 1.6 in | 1.1 in | 1.4 in |
| 81% | 83% | 79% | 76% | 77% | 76% | 76% | 77% | 79% | 81% | 79% | 83% |
| 55% | 58% | 53% | 51% | 46% | 41% | 36% | 36% | 37% | 45% | 42% | 54% |
| 30.0 in | 30.0 in | 30.1 in | 30.0 in | 30.0 in | 29.9 in | 29.9 in | 30.0 in | 30.0 in | 30.0 in | 30.1 in | 30.1 in |
| 20 | 15 | 22 | 23 | 24 | 23 | 24 | 25 | 25 | 24 | 23 | 20 |
| 7 | 8 | 6 | 7 | 7 | 7 | 7 | 6 | 5 | 6 | 6 | 8 |
| 4 | 5 | 3 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 4 |
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1 | 1 | 2 | 3 | 4 | 5 | 5 | 5 | 4 | 2 | 2 | 1 |
| 42 | 35 | 43 | 46 | 61 | 65 | 78 | 79 | 72 | 58 | 59 | 44 |
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi -1°C Lo -8°C | Hi 1°C Lo -8°C | Hi 6°C Lo -3°C | Hi 13°C Lo 2°C | Hi 20°C Lo 9°C | Hi 24°C Lo 13°C | Hi 28°C Lo 17°C | Hi 27°C Lo 16°C | Hi 23°C Lo 12°C | Hi 16°C Lo 7°C | Hi 8°C Lo 0°C | Hi 3°C Lo -4°C |
| 12 km/h | 12 km/h | 13 km/h | 12 km/h | 10 km/h | 9 km/h | 8 km/h | 8 km/h | 9 km/h | 10 km/h | 11 km/h | 12 km/h |
| 23 mm | 27 mm | 29 mm | 34 mm | 33 mm | 36 mm | 32 mm | 38 mm | 35 mm | 41 mm | 28 mm | 34 mm |
| 81% | 83% | 79% | 76% | 77% | 76% | 76% | 77% | 79% | 81% | 79% | 83% |
| 55% | 58% | 53% | 51% | 46% | 41% | 36% | 36% | 37% | 45% | 42% | 54% |
| 1017 mb | 1017 mb | 1018 mb | 1015 mb | 1016 mb | 1014 mb | 1014 mb | 1015 mb | 1018 mb | 1017 mb | 1019 mb | 1018 mb |
| 20 | 15 | 22 | 23 | 24 | 23 | 24 | 25 | 25 | 24 | 23 | 20 |
| 7 | 8 | 6 | 7 | 7 | 7 | 7 | 6 | 5 | 6 | 6 | 8 |
| 4 | 5 | 3 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 4 |
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 1 | 1 | 2 | 3 | 4 | 5 | 5 | 5 | 4 | 2 | 2 | 1 |
| 42 | 35 | 43 | 46 | 61 | 65 | 78 | 79 | 72 | 58 | 59 | 44 |
| 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.