WeatherWX.com
Somerville Monthly Climate Averages
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 60°F Lo 43°F | Hi 63°F Lo 46°F | Hi 71°F Lo 52°F | Hi 77°F Lo 59°F | Hi 85°F Lo 66°F | Hi 91°F Lo 73°F | Hi 94°F Lo 75°F | Hi 96°F Lo 75°F | Hi 89°F Lo 71°F | Hi 81°F Lo 61°F | Hi 69°F Lo 52°F | Hi 62°F Lo 47°F |
| 8 mph | 9 mph | 9 mph | 9 mph | 8 mph | 7 mph | 7 mph | 6 mph | 6 mph | 7 mph | 8 mph | 8 mph |
| 1.3 in | 1.1 in | 1.5 in | 1.6 in | 2.5 in | 1.6 in | 1 in | 1.4 in | 1.6 in | 1.7 in | 1.3 in | 1.6 in |
| 72% | 77% | 77% | 77% | 78% | 75% | 71% | 67% | 71% | 69% | 74% | 76% |
| 39% | 48% | 45% | 43% | 43% | 37% | 33% | 30% | 33% | 31% | 39% | 46% |
| 30.2 in | 30.1 in | 30.0 in | 29.9 in | 29.9 in | 29.9 in | 30.0 in | 29.9 in | 30.0 in | 30.0 in | 30.1 in | 30.1 in |
| 27 | 22 | 25 | 24 | 24 | 24 | 25 | 25 | 23 | 26 | 25 | 25 |
| 4 | 6 | 6 | 6 | 7 | 7 | 6 | 6 | 7 | 5 | 5 | 6 |
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 3 | 4 | 5 | 5 | 6 | 6 | 7 | 7 | 6 | 5 | 4 | 3 |
| 67 | 47 | 55 | 56 | 55 | 61 | 71 | 77 | 70 | 75 | 63 | 57 |
January |
February |
March |
April |
May |
June |
July |
August |
September |
October |
November |
December |
| Hi 16°C Lo 6°C | Hi 17°C Lo 8°C | Hi 22°C Lo 11°C | Hi 25°C Lo 15°C | Hi 29°C Lo 19°C | Hi 33°C Lo 23°C | Hi 35°C Lo 24°C | Hi 35°C Lo 24°C | Hi 32°C Lo 22°C | Hi 27°C Lo 16°C | Hi 21°C Lo 11°C | Hi 17°C Lo 8°C |
| 13 km/h | 14 km/h | 14 km/h | 14 km/h | 13 km/h | 11 km/h | 11 km/h | 10 km/h | 10 km/h | 12 km/h | 12 km/h | 13 km/h |
| 32 mm | 28 mm | 38 mm | 42 mm | 63 mm | 41 mm | 25 mm | 34 mm | 41 mm | 43 mm | 32 mm | 40 mm |
| 72% | 77% | 77% | 77% | 78% | 75% | 71% | 67% | 71% | 69% | 74% | 76% |
| 39% | 48% | 45% | 43% | 43% | 37% | 33% | 30% | 33% | 31% | 39% | 46% |
| 1021 mb | 1019 mb | 1017 mb | 1014 mb | 1014 mb | 1013 mb | 1015 mb | 1014 mb | 1015 mb | 1016 mb | 1020 mb | 1020 mb |
| 27 | 22 | 25 | 24 | 24 | 24 | 25 | 25 | 23 | 26 | 25 | 25 |
| 4 | 6 | 6 | 6 | 7 | 7 | 6 | 6 | 7 | 5 | 5 | 6 |
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| 3 | 4 | 5 | 5 | 6 | 6 | 7 | 7 | 6 | 5 | 4 | 3 |
| 67 | 47 | 55 | 56 | 55 | 61 | 71 | 77 | 70 | 75 | 63 | 57 |
| 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.