Live Weather & Forecast
Weather in Saint Thomas
Ontario, Canada · Real-time conditions & 3-day outlook
5°C
Feels like 2°C
41°F / Feels 35°F
Overcast
Saint Thomas, Ontario
🌞 Daytime
Updated: 2026-04-25 07:15
Humidity
100%
Wind
18.4 km/h ENE
Wind Gust
24.8 km/h
Pressure
1009 mb
Visibility
16 km
UV Index
0
(Low)
Precipitation
0.95 mm
Cloud Cover
100%
Dew Point
4.5°C
Wind Degree
65°
Air Quality Index
US EPA: Good
UK DEFRA: Low (1)
CO
200.9 μg/m³
NO₂
8.4 μg/m³
O₃
66 μg/m³
SO₂
4.1 μg/m³
PM 2.5
8.7 μg/m³
PM 10
9.1 μg/m³
Today's Hourly Forecast
24-hour breakdown for Saint Thomas, Ontario
12 AM
8°
Patchy rain nearby
1 AM
7°
Patchy rain nearby
2 AM
7°
Patchy rain nearby
3 AM
7°
Patchy rain nearby
4 AM
6°
Patchy rain nearby
5 AM
6°
Light rain
6 AM
6°
Light drizzle
7 AM
5°
Overcast
8 AM
6°
Light drizzle
9 AM
6°
Patchy rain nearby
10 AM
7°
Overcast
11 AM
8°
Overcast
12 PM
8°
Patchy rain nearby
1 PM
8°
Overcast
2 PM
9°
Overcast
3 PM
9°
Overcast
4 PM
9°
Overcast
5 PM
10°
Patchy rain nearby
6 PM
10°
Cloudy
7 PM
9°
Partly Cloudy
8 PM
8°
Sunny
9 PM
7°
Clear
10 PM
6°
Clear
11 PM
5°
Clear
3-Day Forecast
Daily overview for Saint Thomas, Ontario
Today
Moderate rain
11°
/
5°
🌧️ 87% chance of rain
💧 Avg. humidity: 85%
💨 Max wind: 25.2 km/h
🌧️ Total precip: 9.23 mm
☀️ UV Index: 4.1
🌅 Sunrise: 06:27 AM
🌇 Sunset: 08:19 PM
🌙 Waxing Gibbous
🌑 Moon: 60% lit
Sun, Apr 26
Partly Cloudy
15°
/
3°
🌧️ 0% chance of rain
💧 Avg. humidity: 76%
💨 Max wind: 19.1 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 6.4
🌅 Sunrise: 06:26 AM
🌇 Sunset: 08:20 PM
🌙 Waxing Gibbous
🌑 Moon: 70% lit
Mon, Apr 27
Sunny
19°
/
6°
🌧️ 0% chance of rain
💧 Avg. humidity: 68%
💨 Max wind: 35.3 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 6.5
🌅 Sunrise: 06:24 AM
🌇 Sunset: 08:21 PM
🌙 Waxing Gibbous
🌑 Moon: 79% lit
Best Time to Visit Saint Thomas
Plan your trip to Saint Thomas, 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 Saint Thomas?
Current conditions in Saint Thomas: Overcast, temperature 5°C, humidity 100%.
What is the best time to visit Saint Thomas?
The best time to visit Saint Thomas is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Saint Thomas?
Saint Thomas is located at approximately 42.8° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Saint Thomas?
The wettest period in Saint Thomas is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Saint Thomas?
For visits to Saint Thomas during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What are the public holidays in Saint Thomas in 2026?
View the 2026 public holidays for Saint Thomas on our Holidays page.
What are the GPS coordinates used for the weather forecast in Saint Thomas?
The weather forecast for Saint Thomas uses coordinates 42.779, -81.193.
What is the current temperature outside in Saint Thomas?
The current outdoor temperature in Saint Thomas is 5°C (41°F) with overcast.
What is the hourly weather forecast for Saint Thomas today?
Today's hour-by-hour weather breakdown for Saint Thomas 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 Saint Thomas tomorrow hour by hour?
Tomorrow's forecast for Saint Thomas shows a high of 15°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 Saint Thomas?
There is a 87% chance of rain in Saint Thomas 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 Saint Thomas?
Yes, there is a 87% chance of rain in Saint Thomas today — consider carrying an umbrella. Check the hourly forecast above for the most likely rain windows.