Live Weather & Forecast
Weather in Chelmsford
Ontario, Canada · Real-time conditions & 3-day outlook
6°C
Feels like 4°C
43°F / Feels 38°F
Partly cloudy
Chelmsford, Ontario
🌞 Daytime
Updated: 2026-04-25 10:15
Humidity
56%
Wind
12.6 km/h ESE
Wind Gust
14.5 km/h
Pressure
1015 mb
Visibility
32 km
UV Index
1.3
(Low)
Precipitation
0.04 mm
Cloud Cover
75%
Dew Point
3.4°C
Wind Degree
106°
Air Quality Index
US EPA: Good
UK DEFRA: Low (1)
CO
144.9 μg/m³
NO₂
1.7 μg/m³
O₃
90 μg/m³
SO₂
1.8 μg/m³
PM 2.5
3.5 μg/m³
PM 10
4.4 μg/m³
Today's Hourly Forecast
24-hour breakdown for Chelmsford, Ontario
12 AM
6°
Clear
1 AM
6°
Clear
2 AM
5°
Clear
3 AM
5°
Clear
4 AM
5°
Clear
5 AM
5°
Patchy rain nearby
6 AM
5°
Patchy rain nearby
7 AM
5°
Mist
8 AM
6°
Partly Cloudy
9 AM
7°
Sunny
10 AM
6°
Partly cloudy
11 AM
10°
Sunny
12 PM
11°
Sunny
1 PM
13°
Sunny
2 PM
14°
Sunny
3 PM
16°
Sunny
4 PM
15°
Sunny
5 PM
14°
Sunny
6 PM
13°
Sunny
7 PM
11°
Sunny
8 PM
9°
Sunny
9 PM
8°
Clear
10 PM
7°
Clear
11 PM
6°
Clear
3-Day Forecast
Daily overview for Chelmsford, Ontario
Today
Sunny
17°
/
4°
🌧️ 0% chance of rain
💧 Avg. humidity: 66%
💨 Max wind: 15.5 km/h
🌧️ Total precip: 0.06 mm
☀️ UV Index: 5.5
🌅 Sunrise: 06:19 AM
🌇 Sunset: 08:25 PM
🌙 Waxing Gibbous
🌑 Moon: 60% lit
Sun, Apr 26
Sunny
16°
/
3°
🌧️ 0% chance of rain
💧 Avg. humidity: 60%
💨 Max wind: 10.1 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 5.9
🌅 Sunrise: 06:17 AM
🌇 Sunset: 08:26 PM
🌙 Waxing Gibbous
🌑 Moon: 70% lit
Mon, Apr 27
Sunny
19°
/
4°
🌧️ 0% chance of rain
💧 Avg. humidity: 56%
💨 Max wind: 19.8 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 6.2
🌅 Sunrise: 06:16 AM
🌇 Sunset: 08:28 PM
🌙 Waxing Gibbous
🌑 Moon: 79% lit
Best Time to Visit Chelmsford
Plan your trip to Chelmsford, Canada 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: Partly cloudy, temperature 6°C, humidity 56%.
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 46.6° 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 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 46.5692, -81.1979.
What is the current temperature outside in Chelmsford?
The current outdoor temperature in Chelmsford is 6°C (43°F) with partly cloudy.
What is the hourly weather forecast for Chelmsford today?
Today's hour-by-hour weather breakdown for Chelmsford is shown in the Hourly Forecast section above, including temperature, rain chance, and conditions for each hour of the day.
What is the weather in Chelmsford tomorrow hour by hour?
Tomorrow's forecast for Chelmsford shows a high of 16°C and a low of 3°C. See the 3-Day Forecast section above for a full hourly breakdown.
What is the chance of rain today in Chelmsford?
Rain is not expected in Chelmsford today. Current forecast shows no significant rain probability.
Is it going to rain today in Chelmsford?
No, rain is not forecast for Chelmsford today. Current conditions show clear to partly cloudy skies.