St. Thomas Weather in June
What's the weather like in St. Thomas (Ontario) in June 2025?
The climate in St. Thomas during June can be summarized as mild and a little damp.
June is in the summer in St. Thomas and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around 23°C (73°F), whilst at night 12°C (54°F) is normal.
| Daytime temperature | 23°C 73.4°F |
|---|---|
| Nightly temperature | 12°C 53.6°F |
| Average temperature | 17.5°C 63.5°F |
| Daily sunshine | 9.3 hrs |
| Avg rainfall | 88 mm 3.5 ins |
| Rainy days | 11 days |
| Sea temperature | 15.7°C 60.3°F |
| Humidity | 72% |
| Windspeed | 13kph 8 mph |
On average June is the 4th wettest month of the year in St. Thomas with around 88mm 3.5 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 11 days, although this may vary considerably.
On the flip side this corresponds to an average of 9.3 hours of sunshine per day.
June temperatures in St. Thomas
June rainfall
June hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in St. Thomas in June 2025.
Other monthly averages
St. Thomas weather stats
| Hottest month: | July | 25.6°C 78.1°F |
|---|---|---|
| Driest month: | February | 55mm 2.2ins |
| Sunniest month: | July | 9.6hrs |
| Coldest month: | January | -2.3°C 27.9°F |
| Wettest month: | December | 94mm 3.7ins |
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