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City of St. Thomas, ONSt. Thomas, ON 7-Day Weather Forecast
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St. Thomas, ON Weather Forecast
St. Thomas, ON Weather Forecast Date: 1055 PM Wed Sep 30 2026 (St. Thomas Time)
Today Lo: 15°C58°F Hi: 23°C74°F |
Overcast Wednesday, temperatures as high as 23°C74°F, low temperature around 15°C58°F, chance of rain 12%, wind out of the SSW 22 km/h13 mph. Barometric pressure 101.6 kPa30 in, visibility 10 km6 mi, humidity 50%. |
| Thursday Lo: 15°C60°F Hi: 20°C69°F |
Overcast Thursday, temperatures as high as 20°C69°F, low temperature around 15°C60°F, chance of rain 26%, wind out of the S 15 km/h9 mph. Barometric pressure 101.2 kPa29.88 in, visibility 10 km6 mi, humidity 85%. |
| Friday Lo: 9°C49°F Hi: 17°C63°F |
Overcast Friday, temperatures as high as 17°C63°F, low temperature around 9°C49°F, chance of rain 13%, wind out of the NW 25 km/h15 mph. Barometric pressure 101.7 kPa30.03 in, visibility 10 km6 mi, humidity 53%. |
Saturday Lo: 8°C46°F Hi: 17°C62°F |
Sunny Saturday, temperatures as high as 17°C62°F, low temperature around 8°C46°F, chance of rain 1%, wind out of the E 13 km/h8 mph. Barometric pressure 102.7 kPa30.33 in, visibility 10 km6 mi, humidity 42%. |
| Sunday Lo: 9°C47°F Hi: 20°C68°F |
Overcast Sunday, temperatures as high as 20°C68°F, low temperature around 9°C47°F, chance of rain 11%, wind out of the SSW 9 km/h6 mph. Barometric pressure 101.9 kPa30.09 in, visibility 10 km6 mi, humidity 45%. |
| Monday Lo: 7°C44°F Hi: 12°C54°F |
Sunny Monday, temperatures as high as 12°C54°F, low temperature around 7°C44°F, chance of rain 1%, wind out of the NNW 31 km/h19 mph. Barometric pressure 102.1 kPa30.15 in, visibility 10 km6 mi, humidity 39%. |
| Tuesday Lo: 3°C37°F Hi: 12°C53°F |
Sunny Tuesday, temperatures as high as 12°C53°F, low temperature around 3°C37°F, chance of rain 1%, wind out of the ESE 7 km/h4 mph. Barometric pressure 102.7 kPa30.33 in, visibility 10 km6 mi, humidity 40%. |
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