Current Conditions

St. Thomas, Ontario

74°F23°C

Cloudy

Wind

SE 7 mph11 km/h

Humidity

64%

Cloud Cover

96%

As of Tuesday, September 8, 2026 at 4:13 PM EDT

Today's Outlook

Day

Overcast and warm, with a high of 74°F23°C. Breezy from the SSE at 7 mph11 km/h.

Night

Overcast, with a low around 69°F20°C. Breezy from the ESE at 7 to 8 mph12 to 13 km/h.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Cloudy	High 74°F23°C	Low 69°F20°C	Precip 0 in0 mm—	Cloud 95%	Wind SE 7 mph11 km/h	Tuesday: Overcast and warm, with a high of 74°F23°C. Breezy from the SSE at 7 mph11 km/h. Tuesday Night: Overcast, with a low around 69°F20°C. Breezy from the ESE at 7 to 8 mph12 to 13 km/h.
Light Rain	High 76°F24°C	Low 70°F21°C	Precip 0.21 in5.3 mm79%	Cloud 84%	Wind SW 10 mph17 km/h	Wednesday: Overcast and warm, with a high of 76°F24°C. Breezy from the SW at 11 to 13 mph18 to 20 km/h. 79% chance of light rain throughout the day. Humid. Wednesday Night: Mostly cloudy, with a low around 70°F21°C. Breezy from the SW at 10 to 11 mph16 to 18 km/h. 45% chance of light rain before dawn.
Partly Cloudy	High 72°F22°C	Low 59°F15°C	Precip 0 in0 mm—	Cloud 64%	Wind NW 8 mph13 km/h	Thursday: Overcast and warm, with a high of 72°F22°C and morning low of 66°F19°C. Breezy from the NW at 8 to 10 mph13 to 16 km/h. Thursday Night: Partly cloudy, with a low around 59°F15°C. Breezy from the NW at 8 to 10 mph13 to 17 km/h.
Clear	High 72°F22°C	Low 54°F12°C	Precip 0 in0 mm—	Cloud 16%	Wind SE 4 mph7 km/h	Friday: Mostly clear and warm, with a high of 72°F22°C and morning low of 55°F13°C. Light wind from the SSW around 4 mph6 km/h. Friday Night: Mostly clear, with a low around 54°F12°C. Light wind from the ESE around 5 mph8 km/h.
Drizzle	High 76°F25°C	Low 60°F15°C	Precip 0.04 in0.9 mm19%	Cloud 48%	Wind S 8 mph12 km/h	Saturday: Partly cloudy and warm, with a high of 76°F25°C and morning low of 62°F17°C. Breezy from the S at 8 to 9 mph13 to 15 km/h. Saturday Night: Mostly cloudy, with a low around 60°F15°C. Breezy from the SSE at 7 mph11 km/h. 19% chance of drizzle in the evening.
Drizzle	High 74°F23°C	Low 61°F16°C	Precip 0.07 in1.7 mm21%	Cloud 42%	Wind NW 8 mph13 km/h	Sunday: Partly cloudy and warm, with a high of 74°F23°C and morning low of 66°F19°C. Breezy from the NW at 9 to 11 mph14 to 18 km/h. 16% chance of drizzle throughout the day. Sunday Night: Partly cloudy, with a low around 61°F16°C. Breezy from the NW at 8 mph13 km/h. 21% chance of drizzle throughout the night.
Partly Cloudy	High 70°F21°C	Low 57°F14°C	Precip 0.02 in0.5 mm5%	Cloud 51%	Wind NE 8 mph13 km/h	Monday: Mostly cloudy and warm, with a high of 70°F21°C and morning low of 57°F14°C. Breezy from the NNE at 8 mph12 km/h. Monday Night: Partly cloudy, with a low around 57°F14°C. Breezy from the NE at 8 to 9 mph13 to 15 km/h.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	TuesdaySep 8	74°F23°C	69°F20°C	0 in0 mm· —	95%	Cloudy	SE 7 mph11 km/h
DayOvercast and warm, with a high of 74°F23°C. Breezy from the SSE at 7 mph11 km/h. NightOvercast, with a low around 69°F20°C. Breezy from the ESE at 7 to 8 mph12 to 13 km/h.
	WednesdaySep 9	76°F24°C	70°F21°C	0.21 in5.3 mm· 79%	84%	Light Rain	SW 10 mph17 km/h
DayOvercast and warm, with a high of 76°F24°C. Breezy from the SW at 11 to 13 mph18 to 20 km/h. 79% chance of light rain throughout the day. Humid. NightMostly cloudy, with a low around 70°F21°C. Breezy from the SW at 10 to 11 mph16 to 18 km/h. 45% chance of light rain before dawn.
	ThursdaySep 10	72°F22°C	59°F15°C	0 in0 mm· —	64%	Partly Cloudy	NW 8 mph13 km/h
DayOvercast and warm, with a high of 72°F22°C and morning low of 66°F19°C. Breezy from the NW at 8 to 10 mph13 to 16 km/h. NightPartly cloudy, with a low around 59°F15°C. Breezy from the NW at 8 to 10 mph13 to 17 km/h.
	FridaySep 11	72°F22°C	54°F12°C	0 in0 mm· —	16%	Clear	SE 4 mph7 km/h
DayMostly clear and warm, with a high of 72°F22°C and morning low of 55°F13°C. Light wind from the SSW around 4 mph6 km/h. NightMostly clear, with a low around 54°F12°C. Light wind from the ESE around 5 mph8 km/h.
	SaturdaySep 12	76°F25°C	60°F15°C	0.04 in0.9 mm· 19%	48%	Drizzle	S 8 mph12 km/h
DayPartly cloudy and warm, with a high of 76°F25°C and morning low of 62°F17°C. Breezy from the S at 8 to 9 mph13 to 15 km/h. NightMostly cloudy, with a low around 60°F15°C. Breezy from the SSE at 7 mph11 km/h. 19% chance of drizzle in the evening.
	SundaySep 13	74°F23°C	61°F16°C	0.07 in1.7 mm· 21%	42%	Drizzle	NW 8 mph13 km/h
DayPartly cloudy and warm, with a high of 74°F23°C and morning low of 66°F19°C. Breezy from the NW at 9 to 11 mph14 to 18 km/h. 16% chance of drizzle throughout the day. NightPartly cloudy, with a low around 61°F16°C. Breezy from the NW at 8 mph13 km/h. 21% chance of drizzle throughout the night.
	MondaySep 14	70°F21°C	57°F14°C	0.02 in0.5 mm· 5%	51%	Partly Cloudy	NE 8 mph13 km/h
DayMostly cloudy and warm, with a high of 70°F21°C and morning low of 57°F14°C. Breezy from the NNE at 8 mph12 km/h. NightPartly cloudy, with a low around 57°F14°C. Breezy from the NE at 8 to 9 mph13 to 15 km/h.
	TuesdaySep 15	75°F24°C	63°F17°C	0.09 in2.4 mm· 20%	63%	Showers	SSW 11 mph18 km/h
DayMostly cloudy and warm, with a high of 75°F24°C and morning low of 65°F18°C. Breezy from the SSW at 12 to 13 mph19 to 21 km/h. 17% chance of drizzle throughout the day. NightMostly cloudy, with a low around 63°F17°C. Breezy from the S at 10 to 11 mph16 to 17 km/h. 20% chance of showers throughout the night.
	WednesdaySep 16	74°F23°C	64°F18°C	0.13 in3.3 mm· 29%	63%	Showers	WSW 8 mph12 km/h
DayMostly cloudy and warm, with a high of 74°F23°C and morning low of 64°F18°C. Breezy from the WSW at 7 to 8 mph12 to 12 km/h. 24% chance of showers throughout the day. NightMostly cloudy, with a low around 65°F18°C. Breezy from the W at 8 to 9 mph13 to 15 km/h. 29% chance of showers throughout the night.
	ThursdaySep 17	75°F24°C	63°F17°C	0.18 in4.5 mm· 24%	56%	Showers	S 8 mph14 km/h
DayMostly cloudy and warm, with a high of 75°F24°C and morning low of 64°F18°C. Breezy from the S at 9 mph14 km/h. 24% chance of showers throughout the day. NightMostly cloudy, with a low around 63°F17°C. Breezy from the SSE at 8 to 9 mph13 to 14 km/h. 21% chance of showers throughout the night.
	FridaySep 18	73°F23°C	64°F18°C	0.19 in4.9 mm· 25%	59%	Showers	W 10 mph16 km/h
DayMostly cloudy and warm, with a high of 73°F23°C and morning low of 65°F18°C. Breezy from the W at 10 to 11 mph17 to 18 km/h. 24% chance of showers throughout the day. NightMostly cloudy, with a low around 64°F18°C. Breezy from the W at 10 mph15 km/h. 25% chance of showers throughout the night.
	SaturdaySep 19	69°F20°C	60°F16°C	0.13 in3.2 mm· 21%	59%	Showers	W 10 mph15 km/h
DayMostly cloudy and warm, with a high of 69°F20°C and morning low of 60°F16°C. Breezy from the W at 10 mph16 km/h. 21% chance of drizzle throughout the day. NightMostly cloudy, with a low around 61°F16°C. Breezy from the WNW at 9 to 10 mph15 to 16 km/h. 17% chance of showers throughout the night.
	SundaySep 20	66°F19°C	57°F14°C	0.17 in4.3 mm· 22%	61%	Showers	NW 10 mph16 km/h
DayMostly cloudy and mild, with a high of 66°F19°C and morning low of 57°F14°C. Breezy from the WNW at 10 mph16 km/h. 20% chance of showers throughout the day. NightMostly cloudy, with a low around 58°F14°C. Breezy from the NW at 9 to 10 mph15 to 15 km/h. 22% chance of showers throughout the night.
	MondaySep 21	64°F18°C	54°F12°C	0.09 in2.4 mm· 19%	58%	Drizzle	N 9 mph15 km/h
DayMostly cloudy and mild, with a high of 64°F18°C and morning low of 54°F12°C. Breezy from the N at 9 to 10 mph15 to 16 km/h. 17% chance of drizzle throughout the day. Dry air. NightMostly cloudy, with a low around 55°F13°C. Breezy from the N at 9 mph14 km/h. 19% chance of drizzle throughout the night.
	TuesdaySep 22	65°F18°C	53°F12°C	0.11 in2.9 mm· 19%	59%	Drizzle	E 9 mph14 km/h
DayMostly cloudy and mild, with a high of 65°F18°C and morning low of 54°F12°C. Breezy from the SSE at 9 to 10 mph15 to 16 km/h. 19% chance of drizzle throughout the day. Dry air. NightMostly cloudy, with a low around 53°F12°C. Breezy from the ENE at 8 to 9 mph14 to 14 km/h. 17% 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