Somerville, Massachusetts Weather
Cicadas claim the afternoon. Day 15 of summer. Read this microseason across nine climate regions →
Somerville weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Light Drizzle11%0.01″81°67°—
- MondayJul 6Showers55%0.34″72°62°-9°
- TuesdayJul 7Rain71%0.48″63°60°-9°
- WednesdayJul 8Overcast34%—70°59°+7°
- ThursdayJul 9Overcast13%—84°57°+14°
- FridayJul 10Light Drizzle44%0.04″85°63°+1°
- SaturdayJul 11Overcast25%—83°57°-2°
AQI 31 (Good), driven by PM2.5. AQI down 15 over the last 6 hours — air quality is improving sharply. PM2.5 at 9.0 µg/m³, PM10 at 9.1 µg/m³ — typical background levels with no transport signature.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
PM × Wind × Precip
PM2.5 at 9.0 µg/m³, PM10 at 9.1 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.99
- Wind
- light
- Recent rain
- 1h in last 6h
- Pattern
- background
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 11:02 PM
- Moonset
- 10:53 AM
- In sign
- ♓︎ Pisces
Cicadas claim the afternoon
Somerville at a glance
- Today vs. normal: 3°F above the seasonal normal for this latitude
- Last frost: April 30 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP codes: 02143, 02144, 02145
15-Day Forecast — Somerville
- Sun81°67°11%
- Mon72°62°55%
- Tue63°60°71%
- Wed70°59°34%
- Thu84°57°13%
- Fri85°63°44%
- Sat83°57°25%
- Sun82°61°22%
- Mon66°56°19%
- Tue80°54°24%
- Wed85°63°19%
- Thu89°61°26%
- Fri91°68°19%
- Sat89°69°27%
- Sun92°66°29%
Forecast data from Open-Meteo (CC BY 4.0).
Live wind & temperature near Somerville
Right now in the garden
Peak growing season
As of July 5, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.
SPC Convective Outlook
Storm Prediction Center — Somerville
SPC includes Somerville in the general thunderstorm area tomorrow — no severe risk, but storms are possible.
- TODAYNONENo severe risk
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.
Source: NOAA / NWS Storm Prediction Center categorical convective outlook. Outlooks are re-issued multiple times per day; this page reflects the most recent SPC polygons covering the city’s coordinates.
ZIP codes in Somerville
- 02144
- 02145
- 02143