Historical weather data, all-time temperature records, and monthly climate averages for Somerville, MA. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4 in Somerville sits in that classic New England gray zone — a coin-flip on rain (46% chance) and a 7% shot at snow on a day that averages a modest 51° high. The historical range tells the whole story: this date has seen a balmy 77° back in 2010 and a brutal 17° low in 1954, a 60-degree spread that keeps locals perpetually second-guessing the forecast.
Somerville's weather has real teeth at the extremes — 103° in July 2011 and -14° in February 1943 represent a 117-degree all-time swing. A single August day in 1955 dumped 7.06 inches of rain, and a January 2022 storm buried the city under 23.6 inches of snow in one shot.
Summer peaks mid-July with average highs hitting 83°, while January and February bottom out around 35-38° — that's a 48-degree seasonal spread that demands a full wardrobe. Spring is soggy, with the wettest week of the year falling in mid-March at 1.1 inches, so plan outdoor visits for July through September when the weather cooperates most reliably.