Live Weather & Forecast
Weather in Harriston
Ontario, Canada · Real-time conditions & 3-day outlook
11°C
Feels like 9°C
52°F / Feels 47°F
Sunny
Harriston, Ontario
🌙 Nighttime
Updated: 2026-04-24 20:15
Humidity
37%
Wind
22.7 km/h ESE
Wind Gust
34.6 km/h
Pressure
1008 mb
Visibility
10 km
UV Index
0
(Low)
Precipitation
0 mm
Cloud Cover
0%
Dew Point
0.6°C
Wind Degree
122°
Air Quality Index
US EPA: Good
UK DEFRA: Low (1)
CO
181.7 μg/m³
NO₂
8.2 μg/m³
O₃
87 μg/m³
SO₂
4.5 μg/m³
PM 2.5
3.3 μg/m³
PM 10
3.7 μg/m³
Today's Hourly Forecast
24-hour breakdown for Harriston, Ontario
12 AM
11°
Clear
1 AM
10°
Clear
2 AM
9°
Clear
3 AM
9°
Clear
4 AM
9°
Clear
5 AM
8°
Clear
6 AM
8°
Clear
7 AM
9°
Sunny
8 AM
9°
Sunny
9 AM
10°
Sunny
10 AM
11°
Sunny
11 AM
12°
Sunny
12 PM
13°
Sunny
1 PM
15°
Sunny
2 PM
16°
Sunny
3 PM
15°
Sunny
4 PM
15°
Sunny
5 PM
15°
Sunny
6 PM
13°
Sunny
7 PM
12°
Sunny
8 PM
11°
Sunny
9 PM
9°
Patchy rain nearby
10 PM
7°
Patchy light drizzle
11 PM
6°
Light rain
3-Day Forecast
Daily overview for Harriston, Ontario
Today
Patchy rain nearby
16°
/
6°
🌧️ 84% chance of rain
💧 Avg. humidity: 52%
💨 Max wind: 24.1 km/h
🌧️ Total precip: 1.78 mm
☀️ UV Index: 6.2
🌅 Sunrise: 06:26 AM
🌇 Sunset: 08:19 PM
🌙 First Quarter
🌑 Moon: 49% lit
Sat, Apr 25
Moderate rain
10°
/
3°
🌧️ 89% chance of rain
💧 Avg. humidity: 80%
💨 Max wind: 32.4 km/h
🌧️ Total precip: 8.57 mm
☀️ UV Index: 4.7
🌅 Sunrise: 06:24 AM
🌇 Sunset: 08:20 PM
🌙 Waxing Gibbous
🌑 Moon: 60% lit
Sun, Apr 26
Sunny
14°
/
2°
🌧️ 0% chance of rain
💧 Avg. humidity: 72%
💨 Max wind: 13 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 6.3
🌅 Sunrise: 06:23 AM
🌇 Sunset: 08:21 PM
🌙 Waxing Gibbous
🌑 Moon: 70% lit
Best Time to Visit Harriston
Plan your trip to Harriston, 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 Harriston?
Current conditions in Harriston: Sunny, temperature 11°C, humidity 37%.
What is the best time to visit Harriston?
The best time to visit Harriston is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Harriston?
Harriston is located at approximately 43.9° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Harriston?
The wettest period in Harriston is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Harriston?
For visits to Harriston during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What are the public holidays in Harriston in 2026?
View the 2026 public holidays for Harriston on our Holidays page.
What are the GPS coordinates used for the weather forecast in Harriston?
The weather forecast for Harriston uses coordinates 43.9118, -80.869.
What is the current temperature outside in Harriston?
The current outdoor temperature in Harriston is 11°C (52°F) with sunny.
What is the hourly weather forecast for Harriston today?
Today's hour-by-hour weather breakdown for Harriston 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 Harriston tomorrow hour by hour?
Tomorrow's forecast for Harriston shows a high of 10°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 Harriston?
There is a 84% chance of rain in Harriston today. Check the hourly forecast above for a time-by-time breakdown of when rain is most likely.
Is it going to rain today in Harriston?
Yes, there is a 84% chance of rain in Harriston today — consider carrying an umbrella. Check the hourly forecast above for the most likely rain windows.