Current Conditions

St. Thomas, Ontario

79°F26°C

Rain

Wind

SW 7 mph11 km/h

Humidity

86%

Cloud Cover

85%

As of Wednesday, September 2, 2026 at 11:31 AM EDT

Today's Outlook

Day

Overcast and warm, with a high of 82°F28°C and morning low of 74°F23°C — feels like 90°F32°C. Breezy from the SW at 9 to 11 mph14 to 17 km/h. 53% chance of light rain throughout the day. Heavy, humid air.

Night

Mostly cloudy, with a low around 72°F22°C. Light wind from the WSW around 5 mph9 km/h. 87% chance of rain throughout the night.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Rain	High 82°F28°CFeels 89°F32°C	Low 72°F22°C	Precip 0.39 in10 mm87%	Cloud 84%	Wind SW 8 mph12 km/h	Wednesday: Overcast and warm, with a high of 82°F28°C and morning low of 74°F23°C — feels like 90°F32°C. Breezy from the SW at 9 to 11 mph14 to 17 km/h. 53% chance of light rain throughout the day. Heavy, humid air. Wednesday Night: Mostly cloudy, with a low around 72°F22°C. Light wind from the WSW around 5 mph9 km/h. 87% chance of rain throughout the night.
Light Rain	High 79°F26°C	Low 70°F21°C	Precip 0.26 in6.7 mm66%	Cloud 74%	Wind W 5 mph8 km/h	Thursday: Overcast and warm, with a high of 79°F26°C and morning low of 71°F21°C. Breezy from the W at 6 to 7 mph9 to 11 km/h. 60% chance of light rain throughout the day. Heavy, humid air. Thursday Night: Mostly cloudy, with a low around 70°F21°C. Light wind from the W around 5 mph8 km/h. 66% chance of showers throughout the night.
Showers	High 77°F25°C	Low 67°F20°C	Precip 0.17 in4.3 mm46%	Cloud 68%	Wind NNW 6 mph9 km/h	Friday: Overcast and warm, with a high of 77°F25°C and morning low of 67°F20°C. Light wind from the NNW around 5 mph8 km/h. 29% chance of light rain throughout the day. Friday Night: Mostly cloudy, with a low around 68°F20°C. Breezy from the NNW at 6 to 8 mph10 to 12 km/h. 46% chance of showers throughout the night.
Clear	High 77°F25°C	Low 62°F17°C	Precip 0 in0 mm—	Cloud 26%	Wind NNE 6 mph10 km/h	Saturday: Partly cloudy and warm, with a high of 77°F25°C and morning low of 63°F17°C. Breezy from the NNE at 6 to 8 mph10 to 12 km/h. Saturday Night: Mostly clear, with a low around 62°F17°C. Breezy from the NE at 7 to 8 mph11 to 13 km/h.
Clear	High 74°F24°C	Low 61°F16°C	Precip 0 in0.1 mm7%	Cloud 38%	Wind E 7 mph11 km/h	Sunday: Mostly cloudy and warm, with a high of 74°F24°C and morning low of 62°F17°C. Breezy from the E at 7 to 8 mph11 to 12 km/h. Sunday Night: Partly cloudy, with a low around 61°F16°C. Breezy from the ENE at 6 to 7 mph10 to 11 km/h.
Partly Cloudy	High 76°F24°C	Low 60°F16°C	Precip 0 in0 mm—	Cloud 48%	Wind E 6 mph9 km/h	Monday: Partly cloudy and warm, with a high of 76°F24°C and morning low of 61°F16°C. Light wind from the E around 6 mph10 km/h. Monday Night: Partly cloudy, with a low around 60°F16°C. Light wind from the E around 6 mph9 km/h.
Partly Cloudy	High 76°F25°C	Low 63°F17°C	Precip 0.01 in0.3 mm9%	Cloud 76%	Wind ESE 7 mph12 km/h	Tuesday: Overcast and warm, with a high of 76°F25°C and morning low of 64°F18°C. Breezy from the SE at 7 to 8 mph12 to 13 km/h. Tuesday Night: Mostly cloudy, with a low around 63°F17°C. Breezy from the ESE at 7 to 9 mph12 to 14 km/h.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	WednesdaySep 2	82°F28°C Feels 89°F32°C	72°F22°C	0.39 in10 mm· 87%	84%	Rain	SW 8 mph12 km/h
DayOvercast and warm, with a high of 82°F28°C and morning low of 74°F23°C — feels like 90°F32°C. Breezy from the SW at 9 to 11 mph14 to 17 km/h. 53% chance of light rain throughout the day. Heavy, humid air. NightMostly cloudy, with a low around 72°F22°C. Light wind from the WSW around 5 mph9 km/h. 87% chance of rain throughout the night.
	ThursdaySep 3	79°F26°C	70°F21°C	0.26 in6.7 mm· 66%	74%	Light Rain	W 5 mph8 km/h
DayOvercast and warm, with a high of 79°F26°C and morning low of 71°F21°C. Breezy from the W at 6 to 7 mph9 to 11 km/h. 60% chance of light rain throughout the day. Heavy, humid air. NightMostly cloudy, with a low around 70°F21°C. Light wind from the W around 5 mph8 km/h. 66% chance of showers throughout the night.
	FridaySep 4	77°F25°C	67°F20°C	0.17 in4.3 mm· 46%	68%	Showers	NNW 6 mph9 km/h
DayOvercast and warm, with a high of 77°F25°C and morning low of 67°F20°C. Light wind from the NNW around 5 mph8 km/h. 29% chance of light rain throughout the day. NightMostly cloudy, with a low around 68°F20°C. Breezy from the NNW at 6 to 8 mph10 to 12 km/h. 46% chance of showers throughout the night.
	SaturdaySep 5	77°F25°C	62°F17°C	0 in0 mm· —	26%	Clear	NNE 6 mph10 km/h
DayPartly cloudy and warm, with a high of 77°F25°C and morning low of 63°F17°C. Breezy from the NNE at 6 to 8 mph10 to 12 km/h. NightMostly clear, with a low around 62°F17°C. Breezy from the NE at 7 to 8 mph11 to 13 km/h.
	SundaySep 6	74°F24°C	61°F16°C	0 in0.1 mm· 7%	38%	Clear	E 7 mph11 km/h
DayMostly cloudy and warm, with a high of 74°F24°C and morning low of 62°F17°C. Breezy from the E at 7 to 8 mph11 to 12 km/h. NightPartly cloudy, with a low around 61°F16°C. Breezy from the ENE at 6 to 7 mph10 to 11 km/h.
	MondaySep 7	76°F24°C	60°F16°C	0 in0 mm· —	48%	Partly Cloudy	E 6 mph9 km/h
DayPartly cloudy and warm, with a high of 76°F24°C and morning low of 61°F16°C. Light wind from the E around 6 mph10 km/h. NightPartly cloudy, with a low around 60°F16°C. Light wind from the E around 6 mph9 km/h.
	TuesdaySep 8	76°F25°C	63°F17°C	0.01 in0.3 mm· 9%	76%	Partly Cloudy	ESE 7 mph12 km/h
DayOvercast and warm, with a high of 76°F25°C and morning low of 64°F18°C. Breezy from the SE at 7 to 8 mph12 to 13 km/h. NightMostly cloudy, with a low around 63°F17°C. Breezy from the ESE at 7 to 9 mph12 to 14 km/h.
	WednesdaySep 9	81°F27°C Feels 85°F30°C	70°F21°C	0.1 in2.6 mm· 19%	56%	Showers	SW 10 mph17 km/h
DayMostly cloudy and warm, with a high of 81°F27°C and morning low of 71°F22°C. Breezy from the SW at 11 to 12 mph18 to 19 km/h. 17% chance of drizzle throughout the day. Humid. NightMostly cloudy, with a low around 70°F21°C. Breezy from the SW at 10 to 11 mph16 to 17 km/h. 19% chance of showers throughout the night.
	ThursdaySep 10	78°F26°C	70°F21°C	0.14 in3.6 mm· 23%	55%	Showers	W 10 mph15 km/h
DayMostly cloudy and warm, with a high of 78°F26°C and morning low of 71°F22°C. Breezy from the W at 10 to 11 mph16 to 18 km/h. 23% chance of drizzle throughout the day. Humid. NightPartly cloudy, with a low around 70°F21°C. Breezy from the W at 9 to 10 mph15 to 16 km/h. 22% chance of showers throughout the night.
	FridaySep 11	76°F24°C	67°F19°C	0.12 in3 mm· 20%	59%	Drizzle	W 8 mph14 km/h
DayMostly cloudy and warm, with a high of 76°F24°C and morning low of 67°F19°C. Breezy from the WSW at 9 to 10 mph15 to 16 km/h. 19% chance of drizzle throughout the day. NightMostly cloudy, with a low around 67°F19°C. Breezy from the W at 8 mph13 km/h. 20% chance of drizzle throughout the night.
	SaturdaySep 12	75°F24°C	65°F19°C	0.24 in6.1 mm· 26%	64%	Showers	SW 9 mph15 km/h
DayMostly cloudy and warm, with a high of 75°F24°C and morning low of 66°F19°C. Breezy from the SW at 9 to 10 mph15 to 16 km/h. 24% chance of showers throughout the day. NightMostly cloudy, with a low around 65°F19°C. Breezy from the WSW at 9 mph14 km/h. 26% chance of showers throughout the night.
	SundaySep 13	73°F23°C	65°F18°C	0.16 in4.1 mm· 26%	64%	Showers	WSW 9 mph15 km/h
DayMostly cloudy and warm, with a high of 73°F23°C and morning low of 65°F18°C. Breezy from the WSW at 10 mph15 km/h. 23% chance of showers throughout the day. NightMostly cloudy, with a low around 65°F18°C. Breezy from the W at 9 to 10 mph15 to 16 km/h. 26% chance of showers throughout the night.
	MondaySep 14	72°F22°C	63°F17°C	0.17 in4.3 mm· 23%	60%	Showers	W 9 mph15 km/h
DayMostly cloudy and warm, with a high of 72°F22°C and morning low of 63°F17°C. Breezy from the WSW at 10 mph15 km/h. 23% chance of showers throughout the day. NightMostly cloudy, with a low around 63°F17°C. Breezy from the W at 9 mph14 km/h. 22% chance of showers throughout the night.
	TuesdaySep 15	71°F22°C	61°F16°C	0.1 in2.6 mm· 17%	54%	Showers	WNW 9 mph14 km/h
DayMostly cloudy and warm, with a high of 71°F22°C and morning low of 61°F16°C. Breezy from the W at 9 to 10 mph15 to 16 km/h. 16% chance of drizzle throughout the day. NightMostly cloudy, with a low around 62°F16°C. Breezy from the WNW at 8 to 9 mph13 to 14 km/h. 17% chance of showers throughout the night.
	WednesdaySep 16	71°F22°C	60°F16°C	0.09 in2.4 mm· 13%	52%	Drizzle	ENE 9 mph14 km/h
DayMostly cloudy and warm, with a high of 71°F22°C and morning low of 60°F16°C. Breezy from the SW at 9 mph14 km/h. 13% chance of drizzle throughout the day. NightPartly cloudy, with a low around 60°F16°C. Breezy from the NE at 8 mph13 km/h. 13% chance of drizzle throughout the night.

Nearby Cities

London15 mi24 km Tillsonburg24 mi38 km Strathroy26 mi41 km Woodstock33 mi53 km Norfolk County41 mi65 km Stratford43 mi69 km

About This Forecast

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Coordinates: 42.7736°N, 81.1804°W·Elevation: 232m·Timezone: America/Toronto·Population: 38,909