Southampton (ON) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Southampton.
Climate overview of Southampton
Southampton, Ontario, Canada, experiences significant temperature variation throughout the year. Summers bring daytime highs of 24°C (75°F) in August, while winters cool to -1°C (30°F) in February.
The city has a wet climate, receiving around 1144 mm (45 in) of rain/snowfall per year. Despite the high annual total, it has warm summers and very cold winters. October is the wettest month.
Southampton Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Southampton - and find the best time to visit.
Monthly Temperature in Southampton
Depending on the time of the year, temperatures range from comfortable to very cold in Southampton. On average, daytime temperatures range from a comfortable 24°C (75°F) in August to a very cold -1°C (30°F) in February.
Nighttime temperatures range from 18°C (64°F) in August to -9°C (16°F) in February.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Southampton
Southampton has a relatively rain/snowy climate with high precipitation levels, averaging 1144 mm (45 in) of rain/snowfall annually. The amount of precipitation varies moderately throughout the year. The wettest month, October, sees around 118 mm (4.6 in) of rainfall, perfect for those who enjoy a bit of rain now and then. The driest month, March, still receives a respectable 70 mm (2.8 in) of snow/rainfall. For more details, please visit our Southampton Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Best Time to Visit Southampton
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: June, July and August
- Warmest weather: July and August
- Fewest rainy days: July and August
- Seasonal pattern: Warm summers and very cold winters
- Coldest conditions: February, with freezing nights around -9°C (16°F).
Frequently asked questions about the climate in Southampton
What is the best time to visit Southampton?
June, July and August typically offer the most optimal weather in Southampton. In contrast, January, February, March, April, November and December tend to have less optimal conditions. Southampton has warm summers and very cold winters.
What temperatures can I expect in Southampton?
Daytime highs range from -1°C (30°F) in February to 24°C (75°F) in August. Nighttime lows range from -9°C (16°F) to 18°C (64°F). Temperatures vary considerably through the year.
How much rain does Southampton get?
Annual rainfall is around 1144 mm (45 in). October is the wettest month with 118 mm (4.6 in), while March is the driest with 70 mm (2.8 in).
Southampton 3-Day Forecast
Southampton on the map
Southampton is highlighted - select any city to see its climate.
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