Live Weather & Forecast
Weather in Grimsby
Ontario, Canada · Real-time conditions & 3-day outlook
2°C
Feels like -0°C
36°F / Feels 32°F
Clear
Grimsby, Ontario
🌙 Nighttime
Updated: 2026-04-27 05:30
Humidity
83%
Wind
8.3 km/h E
Wind Gust
17.4 km/h
Pressure
1023 mb
Visibility
10 km
UV Index
0
(Low)
Precipitation
0 mm
Cloud Cover
0%
Dew Point
-0.6°C
Wind Degree
88°
Air Quality Index
US EPA: Moderate
UK DEFRA: Low (3)
CO
452.9 μg/m³
NO₂
20.4 μg/m³
O₃
51 μg/m³
SO₂
5.3 μg/m³
PM 2.5
31.5 μg/m³
PM 10
33.6 μg/m³
Today's Hourly Forecast
24-hour breakdown for Grimsby, Ontario
12 AM
7°
Clear
1 AM
6°
Clear
2 AM
6°
Clear
3 AM
5°
Clear
4 AM
5°
Clear
5 AM
2°
Clear
6 AM
4°
Clear
7 AM
5°
Sunny
8 AM
7°
Sunny
9 AM
10°
Sunny
10 AM
13°
Sunny
11 AM
14°
Sunny
12 PM
15°
Sunny
1 PM
16°
Sunny
2 PM
16°
Sunny
3 PM
16°
Sunny
4 PM
16°
Sunny
5 PM
15°
Sunny
6 PM
14°
Sunny
7 PM
13°
Sunny
8 PM
12°
Sunny
9 PM
12°
Clear
10 PM
12°
Clear
11 PM
12°
Partly Cloudy
3-Day Forecast
Daily overview for Grimsby, Ontario
Today
Sunny
17°
/
4°
🌧️ 0% chance of rain
💧 Avg. humidity: 71%
💨 Max wind: 20.9 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 6.7
🌅 Sunrise: 06:17 AM
🌇 Sunset: 08:15 PM
🌙 Waxing Gibbous
🌑 Moon: 79% lit
Tue, Apr 28
Patchy rain nearby
14°
/
10°
🌧️ 89% chance of rain
💧 Avg. humidity: 81%
💨 Max wind: 39.6 km/h
🌧️ Total precip: 3.79 mm
☀️ UV Index: 4
🌅 Sunrise: 06:15 AM
🌇 Sunset: 08:16 PM
🌙 Waxing Gibbous
🌑 Moon: 87% lit
Wed, Apr 29
Patchy rain nearby
7°
/
6°
🌧️ 83% chance of rain
💧 Avg. humidity: 90%
💨 Max wind: 18.7 km/h
🌧️ Total precip: 4.01 mm
☀️ UV Index: 2.8
🌅 Sunrise: 06:14 AM
🌇 Sunset: 08:17 PM
🌙 Waxing Gibbous
🌑 Moon: 93% lit
Best Time to Visit Grimsby
Plan your trip to Grimsby, 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 Grimsby?
Current conditions in Grimsby: Clear, temperature 2°C, humidity 83%.
What is the best time to visit Grimsby?
The best time to visit Grimsby is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Grimsby?
Grimsby is located at approximately 43.2° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Grimsby?
The wettest period in Grimsby is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Grimsby?
For visits to Grimsby during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What are the public holidays in Grimsby in 2026?
View the 2026 public holidays for Grimsby on our Holidays page.
What are the GPS coordinates used for the weather forecast in Grimsby?
The weather forecast for Grimsby uses coordinates 43.1932, -79.5607.
What is the current temperature outside in Grimsby?
The current outdoor temperature in Grimsby is 2°C (36°F) with clear.
What is the hourly weather forecast for Grimsby today?
Today's hour-by-hour weather breakdown for Grimsby 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 Grimsby tomorrow hour by hour?
Tomorrow's forecast for Grimsby shows a high of 14°C and a low of 10°C. See the 3-Day Forecast section above for a full hourly breakdown.
What is the chance of rain today in Grimsby?
Rain is not expected in Grimsby today. Current forecast shows no significant rain probability.
Is it going to rain today in Grimsby?
No, rain is not forecast for Grimsby today. Current conditions show clear to partly cloudy skies.