Live Weather & Forecast
Weather in Harrow
Ontario, Canada · Real-time conditions & 3-day outlook
12°C
Feels like 11°C
54°F / Feels 52°F
Light rain
Harrow, Ontario
🌙 Nighttime
Updated: 2026-04-25 02:30
Humidity
100%
Wind
8.6 km/h SE
Wind Gust
14.5 km/h
Pressure
1008 mb
Visibility
4 km
UV Index
0
(Low)
Precipitation
0 mm
Cloud Cover
100%
Dew Point
10.5°C
Wind Degree
140°
Air Quality Index
US EPA: Moderate
UK DEFRA: Low (2)
CO
210.9 μg/m³
NO₂
26.7 μg/m³
O₃
49 μg/m³
SO₂
4 μg/m³
PM 2.5
18.4 μg/m³
PM 10
18.8 μg/m³
Today's Hourly Forecast
24-hour breakdown for Harrow, Ontario
12 AM
11°
Light rain
1 AM
11°
Light rain
2 AM
12°
Light rain
3 AM
12°
Mist
4 AM
12°
Overcast
5 AM
12°
Overcast
6 AM
12°
Mist
7 AM
11°
Fog
8 AM
12°
Mist
9 AM
12°
Mist
10 AM
12°
Overcast
11 AM
13°
Overcast
12 PM
12°
Overcast
1 PM
12°
Patchy rain nearby
2 PM
12°
Overcast
3 PM
13°
Cloudy
4 PM
13°
Partly Cloudy
5 PM
13°
Partly Cloudy
6 PM
12°
Partly Cloudy
7 PM
12°
Partly Cloudy
8 PM
11°
Cloudy
9 PM
10°
Cloudy
10 PM
10°
Overcast
11 PM
9°
Partly Cloudy
3-Day Forecast
Daily overview for Harrow, Ontario
Today
Patchy rain nearby
13°
/
9°
🌧️ 84% chance of rain
💧 Avg. humidity: 85%
💨 Max wind: 23.8 km/h
🌧️ Total precip: 3.48 mm
☀️ UV Index: 4.5
🌅 Sunrise: 06:36 AM
🌇 Sunset: 08:25 PM
🌙 Waxing Gibbous
🌑 Moon: 60% lit
Sun, Apr 26
Partly Cloudy
14°
/
6°
🌧️ 0% chance of rain
💧 Avg. humidity: 75%
💨 Max wind: 21.2 km/h
🌧️ Total precip: 0.01 mm
☀️ UV Index: 5.9
🌅 Sunrise: 06:35 AM
🌇 Sunset: 08:26 PM
🌙 Waxing Gibbous
🌑 Moon: 70% lit
Mon, Apr 27
Partly Cloudy
17°
/
9°
🌧️ 0% chance of rain
💧 Avg. humidity: 72%
💨 Max wind: 33.5 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 7
🌅 Sunrise: 06:34 AM
🌇 Sunset: 08:27 PM
🌙 Waxing Gibbous
🌑 Moon: 79% lit
Best Time to Visit Harrow
Plan your trip to Harrow, 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 Harrow?
Current conditions in Harrow: Light rain, temperature 12°C, humidity 100%.
What is the best time to visit Harrow?
The best time to visit Harrow is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Harrow?
Harrow is located at approximately 42° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Harrow?
The wettest period in Harrow is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Harrow?
For visits to Harrow during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What are the public holidays in Harrow in 2026?
View the 2026 public holidays for Harrow on our Holidays page.
What are the GPS coordinates used for the weather forecast in Harrow?
The weather forecast for Harrow uses coordinates 42.0356, -82.9184.
What is the current temperature outside in Harrow?
The current outdoor temperature in Harrow is 12°C (54°F) with light rain.
What is the hourly weather forecast for Harrow today?
Today's hour-by-hour weather breakdown for Harrow 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 Harrow tomorrow hour by hour?
Tomorrow's forecast for Harrow shows a high of 14°C and a low of 6°C. See the 3-Day Forecast section above for a full hourly breakdown.
What is the chance of rain today in Harrow?
There is a 84% chance of rain in Harrow 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 Harrow?
Yes, there is a 84% chance of rain in Harrow today — consider carrying an umbrella. Check the hourly forecast above for the most likely rain windows.