Skip to main content
Every US forecast, compared
checkweather.io
CheckWeather USSomerville
Forecast confidence: High · models disagree by 2°F

Somerville weather

Loading live data…

Partly cloudy,rain likely tomorrow

NWS, the American and the European model agree on a high near 70° in Somerville today. Tomorrow looks drizzle around 68°, with a 100% chance of rain.

70°62°
68°58°
78°55°
79°61°
76°62°
77°67°
Todaymodels agreeTomorrowmodels agreeMondaymodels agreeTuesdaymodels agreeWednesdaysplit ±8°Thursdaysplit ±9°
NWSNational Blend (NBM)
70°
Partly cloudy
Today 70°·Low 63°·Rain 17%
AmericanNOAA GFS
71°
Cloudy
Today 71°·Low 61°·Rain 17%
EuropeanECMWF
70°
Heavy drizzle
Today 70°·Low 63°·Rain 98%

The weather map: all three models at once

NWS, American, European side by side around Somerville and nearby towns.Live rain radar →
Loading the three model maps…

Next 14 hours

consensus of the three models

14-day forecast

where the models agree, and where they split
Today
Partly cloudy
70° 62°
models agree
Tomorrow
Drizzle
68° 58°
models agree
Mon
Clear
78° 55°
models agree
Tue
Partly cloudy
79° 61°
models agree
Wed
Partly cloudy
76° 62°
±8°
Thu
Partly cloudy
77° 67°
±9°
Fri
Cloudy
77° 61°
±12°
Sat
Mostly clear
76° 59°
±11°
Sun
Partly cloudy
79° 62°
±17°
Mon
Light drizzle
82° 65°
±14°
Tue
Drizzle
75° 62°
±11°
Wed
Heavy drizzle
74° 59°
±6°
Thu
Cloudy
70° 57°
models agree
Fri
Cloudy
67° 56°
models agree

Somerville, MA is at its warmest in Jul (average highs near 83°F) and coldest in Feb (lows around 25°F), with roughly 52 in of precipitation across the year. Below, compare what NWS, American, European forecast for Somerville right now, and see exactly where they disagree.

We grade every model against the weather that actually happened, so you can see which forecast model is most accurate in United States before you trust any single number.

Somerville climate by month

average daytime high and overnight low across a typical year
Jan
40°
27°
Feb
42°
25°
Mar
47°
32°
Apr
56°
40°
May
67°
49°
Jun
76°
59°
Jul
83°
67°
Aug
78°
63°
Sep
73°
58°
Oct
64°
48°
Nov
51°
36°
Dec
42°
30°

Which forecast is most accurate in Somerville?

CheckWeather Score — graded against the weather that actually happened
ProviderCheckWeather Score🌡 Temp💨 Wind🌧 RainRun by
European logo
European ★ Best
82
/100rank #1
88±1.2°F97±1.0 mph6581% hitECMWF - European Centre for Medium-Range Weather ForecastsReading, United Kingdom
American logo
American
65
/100rank #2
79±2.1°F93±2.2 mph2961% hitNOAA / NCEP (United States)College Park, Maryland, USA

The CheckWeather Score blends temperature, wind and rain accuracy — each measured against ERA5 (the recorded weather) over the last 30 days across 1999 cities. Lower error means a higher score. See which forecast model is most accurate in United States, how we measure forecast accuracy, or which model each weather app uses.

Where the models disagree

temperature and rain, judged separately
DayTemperatureRain
Today±2°70° to 71°±81%17% to 98% chance
Tomorrow±2°67° to 69°±51%49% to 100% chance
Monmodels agree77° to 78°±1%0% to 1% chance
Tue±1°79° to 80°±21%0% to 21% chance
Wed±8°71° to 80°±2%25% to 27% chance

The models often agree on temperature and still split on rain — and rain is usually what decides whether a plan survives. A wide rain range means the shower is genuinely uncertain, not that the forecast is wrong.

Sunrise and sunset in Somerville

today, local time
Sunrise
06:14
Sunset
19:11
Daylight
12h 57m

Common questions

What's the weather in Somerville today?
On this page we show what NWS, American, European each forecast for Somerville today, side by side and updated live. When all three agree the forecast is reliable; when they split, we flag it so you know the day is genuinely less certain.
Will it rain in Somerville today or tomorrow?
Check the hourly strip and 7-day forecast above. We compare rain from NWS, American, European for Somerville and flag the days where the models disagree on whether showers actually arrive, which is exactly when a single app can catch you out.
Which forecast is most accurate for Somerville?
Over the last 30 days, the European model has been the most accurate for Somerville (CheckWeather Score 82/100), ahead of the American at 65. We grade every model against the recorded weather. See the US accuracy scoreboard for the full method.
What is the warmest month in Somerville?
July is typically the warmest month in Somerville, with average highs around 83°F.
How cold does Somerville get?
The coldest month in Somerville is February, when overnight lows average about 25°F.
How much rain does Somerville get?
Somerville sees roughly 52 in of precipitation a year, with March usually the wettest month.

Nearby

More US weather