Live Weather & Forecast
Weather in Chelmsford
Massachusetts, United States · Real-time conditions & 3-day outlook
9°C
Feels like 8°C
49°F / Feels 46°F
Sunny
Chelmsford, Massachusetts
🌞 Daytime
Updated: 2026-04-12 17:30
Humidity
31%
Wind
11.9 km/h SE
Wind Gust
14.4 km/h
Pressure
1028 mb
Visibility
16 km
UV Index
1.1
(Low)
Precipitation
0 mm
Cloud Cover
25%
Dew Point
-4.9°C
Wind Degree
143°
Air Quality Index
US EPA: Good
UK DEFRA: Low (1)
CO
227.9 μg/m³
NO₂
17.2 μg/m³
O₃
83 μg/m³
SO₂
3.9 μg/m³
PM 2.5
9.3 μg/m³
PM 10
9.7 μg/m³
Today's Hourly Forecast
24-hour breakdown for Chelmsford, Massachusetts
12 AM
6°
Clear
1 AM
5°
Clear
2 AM
4°
Clear
3 AM
3°
Clear
4 AM
2°
Clear
5 AM
2°
Clear
6 AM
2°
Clear
7 AM
3°
Sunny
8 AM
5°
Sunny
9 AM
7°
Sunny
10 AM
10°
Sunny
11 AM
12°
Sunny
12 PM
14°
Sunny
1 PM
14°
Sunny
2 PM
15°
Sunny
3 PM
15°
Sunny
4 PM
15°
Sunny
5 PM
9°
Sunny
6 PM
12°
Sunny
7 PM
11°
Sunny
8 PM
10°
Clear
9 PM
10°
Clear
10 PM
9°
Clear
11 PM
9°
Clear
3-Day Forecast
Daily overview for Chelmsford, Massachusetts
Today
Sunny
16°
/
1°
🌧️ 0% chance of rain
💧 Avg. humidity: 41%
💨 Max wind: 15.8 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.5
🌅 Sunrise: 06:09 AM
🌇 Sunset: 07:24 PM
🌙 Waning Crescent
🌑 Moon: 33% lit
Mon, Apr 13
Patchy rain nearby
18°
/
7°
🌧️ 89% chance of rain
💧 Avg. humidity: 80%
💨 Max wind: 27 km/h
🌧️ Total precip: 0.89 mm
☀️ UV Index: 0.9
🌅 Sunrise: 06:07 AM
🌇 Sunset: 07:25 PM
🌙 Waning Crescent
🌑 Moon: 23% lit
Tue, Apr 14
Partly Cloudy
25°
/
15°
🌧️ 0% chance of rain
💧 Avg. humidity: 71%
💨 Max wind: 17.3 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.7
🌅 Sunrise: 06:05 AM
🌇 Sunset: 07:27 PM
🌙 Waning Crescent
🌑 Moon: 15% lit
Best Time to Visit Chelmsford
Plan your trip to Chelmsford, United States around the most favorable weather conditions.
Peak Season
June – September
Warm, dry summers — ideal for outdoor activities.
Shoulder Season
April – May, October
Fewer crowds, moderate prices, mild weather.
Off Season
November – March
Cooler temperatures; some regions may experience rain or snow.
Frequently Asked Questions
What is the current weather in Chelmsford?
Current conditions in Chelmsford: Sunny, temperature 9°C, humidity 31%.
What is the best time to visit Chelmsford?
The best time to visit Chelmsford is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Chelmsford?
Chelmsford is located at approximately 42.6° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Chelmsford?
The wettest period in Chelmsford is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Chelmsford?
For visits to Chelmsford during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Chelmsford in?
Chelmsford is located in United States, in the state of Massachusetts.
What are the public holidays in Chelmsford in 2026?
View the 2026 public holidays for Chelmsford on our Holidays page.
What are the GPS coordinates used for the weather forecast in Chelmsford?
The weather forecast for Chelmsford uses coordinates 42.5969, -71.3518.