Somerville weather by month
Average highs run from 37°F in January to 82°F in July, and January nights average 23°F. It gets 44 inches of rain and melted snow a year and 49 inches of snow. Nights drop below freezing about 92 times a year. The most comfortable months are May to October.
Best time to visit Somerville
For comfortable weather, go in May to October. In those months the average high stays between 62°F and 86°F, nights average 42°F or warmer, and rain stays under 4.5 inches for the month.
Month by month
| Month | High | Low | Precip. | Snow | Wet days | Days 90°F+ | Nights below 32°F | Feels |
|---|---|---|---|---|---|---|---|---|
| January | 37°F | 23°F | 3.4 in | 14.3 in | 7 | 0 | 25 | cold |
| February | 39°F | 25°F | 3.2 in | 14.4 in | 6 | 0 | 22 | cold |
| March | 46°F | 31°F | 4.2 in | 9.0 in | 7 | 0 | 16 | cold |
| April | 56°F | 41°F | 3.6 in | 1.6 in | 7 | 0 | 2 | cool |
| May | 67°F | 50°F | 3.3 in | 0.0 in | 7 | 1 | 0 | mild |
| June | 76°F | 60°F | 3.9 in | 0.0 in | 7 | 3 | 0 | warm |
| July | 82°F | 66°F | 3.3 in | 0.0 in | 6 | 6 | 0 | warm |
| August | 80°F | 65°F | 3.2 in | 0.0 in | 5 | 4 | 0 | warm |
| September | 73°F | 58°F | 3.6 in | 0.0 in | 6 | 1 | 0 | mild |
| October | 62°F | 48°F | 4.0 in | 0.2 in | 6 | 0 | 0 | mild |
| November | 52°F | 38°F | 3.7 in | 0.7 in | 6 | 0 | 7 | cool |
| December | 42°F | 29°F | 4.3 in | 9.0 in | 7 | 0 | 20 | cold |
| Year | 59°F avg | 44°F avg | 43.6 in | 49.2 in | 77 | 14 | 92 |
"Wet days" are days with at least 0.1 inch of precipitation. "Feels" is a plain-language label for the average high. Normals for 1991-2020 from NOAA NCEI, station Boston Logan Intl. Airport, MA (USW00014739), 5.1 miles from the city center. Averages describe typical conditions, not a forecast.
Sunrise, sunset and daylight in Somerville
The shortest day is December 21, with 9h 04m of daylight; the longest is June 21, with 15h 17m. The earliest sunset comes around December 3 (4:11 pm) and the latest around June 23 (8:25 pm). The sun sets after 8 pm on 81 days a year.
| On the 15th of | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 7:11 am | 4:36 pm | 9h 26m |
| February | 6:41 am | 5:16 pm | 10h 35m |
| March | 6:56 am | 6:50 pm | 11h 54m |
| April | 6:03 am | 7:25 pm | 13h 22m |
| May | 5:23 am | 7:59 pm | 14h 36m |
| June | 5:07 am | 8:22 pm | 15h 16m |
| July | 5:21 am | 8:19 pm | 14h 58m |
| August | 5:51 am | 7:45 pm | 13h 53m |
| September | 6:24 am | 6:53 pm | 12h 29m |
| October | 6:57 am | 6:02 pm | 11h 04m |
| November | 6:35 am | 4:21 pm | 9h 46m |
| December | 7:07 am | 4:12 pm | 9h 05m |
Calculated for 2026 at the center of Somerville with NOAA's solar equations, in local clock time (Eastern Time, including daylight saving time where it applies). Times shift by a minute or two from year to year.
Is Somerville getting warmer?
The last 10 years averaged 3.3°F warmer than the 20th century. See the climate stripes for Somerville.Frequently asked questions
What is the warmest month in Somerville?
July is the warmest month, with an average high of 82°F and an average low of 66°F (NOAA 1991-2020 normals).
What is the coldest month in Somerville?
January is the coldest, with average lows of 23°F and highs of 37°F.
What is the rainiest month in Somerville?
December gets the most precipitation, 4.3 inches on average. February is the driest at 3.2 inches.
Does it snow in Somerville?
Yes. Somerville averages 49 inches of snow a year.
When is the best time to visit Somerville?
For comfortable weather, May to October. Those months average highs between 62 and 86°F with lows of 42°F or more and modest rain.
Thinking of moving to Somerville?
See what homes, rent and everyday prices cost, who lives there and how it compares with nearby cities on the full Somerville profile.
Compare the weather: Somerville vs Cambridge, Somerville vs Boston, Somerville vs Newton, Somerville vs Lynn.