Chelmsford, MA Weather Forecast
Local 7-day forecast
Sunny then Slight Chance Rain Showers
Track current conditions, temperature changes, wind, and the full daily outlook for Chelmsford, MA in one place.
A slight chance of rain showers after 2pm. Sunny, with a high near 91. West wind around 10 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.
Local Weather Overview
This forecast page for Chelmsford, MA is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Jul 14, 2026 8:24 PM EDT.
The active forecast window currently covers Jul 15 to Jul 21, 2026 for Chelmsford, MA.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 15 to Jul 21, 2026
- Latest sync
- Jul 14, 2026 8:24 PM EDT
- Forecast office
- BOX
- Source
- NOAA / NWS
Daily Outlook
This Week in Chelmsford
Wednesday looks like the warmest upcoming period in Chelmsford at 91 degrees F.
Friday Night is the coolest period ahead with temperatures near 62 degrees F.
The strongest winds are forecast for Thursday at about 3 to 12 mph W.
Precipitation is mentioned in 8 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 14, 2026 8:24 PM EDT
- Coverage
- 7 days
- Time zone
- America/New_York
- Forecast office
- BOX
- Radar station
- KBOX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly clear, with a low around 67. West wind 3 to 8 mph.
Sunny, with a high near 88. West wind 3 to 12 mph, with gusts as high as 24 mph.
Partly cloudy, with a low around 64. Northwest wind 3 to 10 mph, with gusts as high as 22 mph.
Sunny, with a high near 86. Northwest wind 3 to 7 mph.
A slight chance of rain showers after 5am. Partly cloudy, with a low around 62. Northwest wind 2 to 6 mph.
A chance of rain showers before 2pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 80. Southwest wind 2 to 7 mph. Chance of precipitation is 50%.
A chance of showers and thunderstorms before 7pm, then showers and thunderstorms likely. Mostly cloudy, with a low around 64. South wind 3 to 7 mph. Chance of precipitation is 70%.
A chance of rain showers. Partly sunny, with a high near 84. West wind around 7 mph. Chance of precipitation is 50%.
A chance of rain showers before 9pm. Partly cloudy, with a low around 64. Northwest wind around 6 mph. Chance of precipitation is 30%.
Mostly sunny, with a high near 84. West wind around 6 mph.
A chance of showers and thunderstorms. Partly cloudy, with a low around 66. Southwest wind around 6 mph. Chance of precipitation is 30%.
A chance of rain showers before 2pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 84. Southwest wind 5 to 9 mph.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Wednesday
Jul 15
|
Sunny then Slight Chance Rain Showers
|
91°F |
10 mph
W
|
|
Wednesday Night
Jul 15
|
Mostly Clear
|
67°F |
3 to 8 mph
W
|
|
Thursday
Jul 16
|
Sunny
|
88°F |
3 to 12 mph
W
|
|
Thursday Night
Jul 16
|
Partly Cloudy
|
64°F |
3 to 10 mph
NW
|
|
Friday
Jul 17
|
Sunny
|
86°F |
3 to 7 mph
NW
|
|
Friday Night
Jul 17
|
Partly Cloudy then Slight Chance Rain Showers
|
62°F |
2 to 6 mph
NW
|
|
Saturday
Jul 18
|
Chance Rain Showers then Chance Showers And Thunderstorms
|
80°F |
2 to 7 mph
SW
|
|
Saturday Night
Jul 18
|
Chance Showers And Thunderstorms then Showers And Thunderstorms Likely
|
64°F |
3 to 7 mph
S
|
|
Sunday
Jul 19
|
Chance Rain Showers
|
84°F |
7 mph
W
|
|
Sunday Night
Jul 19
|
Chance Rain Showers then Partly Cloudy
|
64°F |
6 mph
NW
|
|
Monday
Jul 20
|
Mostly Sunny
|
84°F |
6 mph
W
|
|
Monday Night
Jul 20
|
Chance Showers And Thunderstorms
|
66°F |
6 mph
SW
|
|
Tuesday
Jul 21
|
Chance Rain Showers
|
84°F |
5 to 9 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Chelmsford.
