Current Conditions

Sarnia, Ontario

53°F12°C

Partly Cloudy

Wind

ENE 12 mph19 km/h

Humidity

80%

Cloud Cover

61%

As of Wednesday, September 23, 2026 at 4:33 AM EDT

Today's Outlook

Day

Mostly cloudy and mild, with a high of 67°F20°C and morning low of 54°F12°C. Breezy from the E at 12 to 13 mph19 to 20 km/h. Dry air.

Night

Partly cloudy, with a low around 53°F12°C. Breezy from the ENE at 11 to 12 mph18 to 19 km/h.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Partly Cloudy	High 67°F20°C	Low 53°F12°C	Precip 0 in0 mm—	Cloud 48%	Wind E 12 mph19 km/h	Wednesday: Mostly cloudy and mild, with a high of 67°F20°C and morning low of 54°F12°C. Breezy from the E at 12 to 13 mph19 to 20 km/h. Dry air. Wednesday Night: Partly cloudy, with a low around 53°F12°C. Breezy from the ENE at 11 to 12 mph18 to 19 km/h.
Clear	High 68°F20°C	Low 52°F11°C	Precip 0 in0 mm—	Cloud 3%	Wind E 8 mph13 km/h	Thursday: Mostly clear and mild, with a high of 68°F20°C and morning low of 52°F11°C. Breezy from the E at 8 to 9 mph13 to 14 km/h. Dry air. Thursday Night: Mostly clear, with a low around 52°F11°C. Breezy from the E at 7 to 10 mph12 to 16 km/h.
Partly Cloudy	High 65°F18°C	Low 48°F9°C	Precip 0 in0 mm—	Cloud 57%	Wind NNE 7 mph11 km/h	Friday: Mostly cloudy and mild, with a high of 65°F18°C and morning low of 49°F10°C. Breezy from the NNE at 7 to 10 mph11 to 15 km/h. Dry air. Friday Night: Partly cloudy, with a low around 48°F9°C. Breezy from the NE at 7 to 9 mph12 to 15 km/h.
Clear	High 67°F19°C	Low 52°F11°C	Precip 0 in0 mm—	Cloud 13%	Wind NNE 8 mph14 km/h	Saturday: Mostly clear and mild, with a high of 67°F19°C and morning low of 52°F11°C. Breezy from the NNE at 8 to 11 mph13 to 17 km/h. Dry air. Saturday Night: Mostly clear, with a low around 53°F11°C. Breezy from the NNE at 8 to 10 mph14 to 16 km/h.
Clear	High 68°F20°C	Low 54°F12°C	Precip 0 in0.1 mm2%	Cloud 29%	Wind N 9 mph14 km/h	Sunday: Partly cloudy and mild, with a high of 68°F20°C and morning low of 54°F12°C. Breezy from the N at 10 to 12 mph16 to 20 km/h. Sunday Night: Partly cloudy, with a low around 54°F12°C. Breezy from the N at 8 to 10 mph13 to 17 km/h.
Clear	High 68°F20°C	Low 55°F13°C	Precip 0 in0.1 mm2%	Cloud 23%	Wind N 7 mph12 km/h	Monday: Mostly clear and warm, with a high of 68°F20°C and morning low of 55°F13°C. Breezy from the N at 8 mph13 km/h. Monday Night: Mostly clear, with a low around 55°F13°C. Breezy from the N at 6 to 8 mph10 to 12 km/h.
Partly Cloudy	High 70°F21°C	Low 53°F12°C	Precip 0.01 in0.2 mm4%	Cloud 44%	Wind S 5 mph8 km/h	Tuesday: Partly cloudy and warm, with a high of 70°F21°C and morning low of 53°F12°C. Light wind from the S around 5 mph8 km/h. Tuesday Night: Partly cloudy, with a low around 54°F12°C. Breezy from the S at 5 to 7 mph9 to 11 km/h.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	WednesdaySep 23	67°F20°C	53°F12°C	0 in0 mm· —	48%	Partly Cloudy	E 12 mph19 km/h
DayMostly cloudy and mild, with a high of 67°F20°C and morning low of 54°F12°C. Breezy from the E at 12 to 13 mph19 to 20 km/h. Dry air. NightPartly cloudy, with a low around 53°F12°C. Breezy from the ENE at 11 to 12 mph18 to 19 km/h.
	ThursdaySep 24	68°F20°C	52°F11°C	0 in0 mm· —	3%	Clear	E 8 mph13 km/h
DayMostly clear and mild, with a high of 68°F20°C and morning low of 52°F11°C. Breezy from the E at 8 to 9 mph13 to 14 km/h. Dry air. NightMostly clear, with a low around 52°F11°C. Breezy from the E at 7 to 10 mph12 to 16 km/h.
	FridaySep 25	65°F18°C	48°F9°C	0 in0 mm· —	57%	Partly Cloudy	NNE 7 mph11 km/h
DayMostly cloudy and mild, with a high of 65°F18°C and morning low of 49°F10°C. Breezy from the NNE at 7 to 10 mph11 to 15 km/h. Dry air. NightPartly cloudy, with a low around 48°F9°C. Breezy from the NE at 7 to 9 mph12 to 15 km/h.
	SaturdaySep 26	67°F19°C	52°F11°C	0 in0 mm· —	13%	Clear	NNE 8 mph14 km/h
DayMostly clear and mild, with a high of 67°F19°C and morning low of 52°F11°C. Breezy from the NNE at 8 to 11 mph13 to 17 km/h. Dry air. NightMostly clear, with a low around 53°F11°C. Breezy from the NNE at 8 to 10 mph14 to 16 km/h.
	SundaySep 27	68°F20°C	54°F12°C	0 in0.1 mm· 2%	29%	Clear	N 9 mph14 km/h
DayPartly cloudy and mild, with a high of 68°F20°C and morning low of 54°F12°C. Breezy from the N at 10 to 12 mph16 to 20 km/h. NightPartly cloudy, with a low around 54°F12°C. Breezy from the N at 8 to 10 mph13 to 17 km/h.
	MondaySep 28	68°F20°C	55°F13°C	0 in0.1 mm· 2%	23%	Clear	N 7 mph12 km/h
DayMostly clear and warm, with a high of 68°F20°C and morning low of 55°F13°C. Breezy from the N at 8 mph13 km/h. NightMostly clear, with a low around 55°F13°C. Breezy from the N at 6 to 8 mph10 to 12 km/h.
	TuesdaySep 29	70°F21°C	53°F12°C	0.01 in0.2 mm· 4%	44%	Partly Cloudy	S 5 mph8 km/h
DayPartly cloudy and warm, with a high of 70°F21°C and morning low of 53°F12°C. Light wind from the S around 5 mph8 km/h. NightPartly cloudy, with a low around 54°F12°C. Breezy from the S at 5 to 7 mph9 to 11 km/h.
	WednesdaySep 30	68°F20°C	58°F14°C	0.15 in3.7 mm· 26%	77%	Light Rain	SSE 8 mph13 km/h
DayMostly cloudy and warm, with a high of 68°F20°C and morning low of 58°F14°C. Breezy from the SSE at 8 to 9 mph13 to 15 km/h. 25% chance of light rain throughout the day. NightMostly cloudy, with a low around 58°F14°C. Breezy from the SSE at 8 to 9 mph13 to 15 km/h. 26% chance of light rain throughout the night.
	ThursdayOct 1	67°F19°C	59°F15°C	0.18 in4.6 mm· 26%	74%	Light Rain	S 10 mph15 km/h
DayMostly cloudy and mild, with a high of 67°F19°C and morning low of 59°F15°C. Breezy from the SSW at 10 mph16 km/h. 25% chance of light rain throughout the day. NightMostly cloudy, with a low around 60°F15°C. Breezy from the S at 9 mph15 km/h. 26% chance of light rain throughout the night.
	FridayOct 2	65°F18°C	57°F14°C	0.19 in4.7 mm· 29%	70%	Showers	SSW 9 mph15 km/h
DayMostly cloudy and mild, with a high of 65°F18°C and morning low of 57°F14°C. Breezy from the SW at 10 mph15 km/h. 28% chance of light rain throughout the day. NightMostly cloudy, with a low around 58°F14°C. Breezy from the S at 9 mph15 km/h. 29% chance of showers throughout the night.
	SaturdayOct 3	66°F19°C	56°F13°C	0.15 in3.7 mm· 27%	66%	Showers	SSW 9 mph15 km/h
DayMostly cloudy and mild, with a high of 66°F19°C and morning low of 56°F13°C. Breezy from the SSW at 10 mph16 km/h. 23% chance of drizzle throughout the day. NightMostly cloudy, with a low around 56°F13°C. Breezy from the SSW at 9 mph15 km/h. 27% chance of showers throughout the night.
	SundayOct 4	64°F18°C	56°F13°C	0.13 in3.2 mm· 25%	63%	Showers	WSW 10 mph16 km/h
DayMostly cloudy and mild, with a high of 64°F18°C and morning low of 56°F13°C. Breezy from the WSW at 10 to 11 mph17 to 18 km/h. 25% chance of showers throughout the day. NightMostly cloudy, with a low around 57°F14°C. Breezy from the WSW at 10 mph15 km/h. 21% chance of drizzle throughout the night.
	MondayOct 5	62°F17°C	54°F12°C	0.1 in2.6 mm· 22%	60%	Drizzle	WSW 10 mph17 km/h
DayMostly cloudy and mild, with a high of 62°F17°C and morning low of 54°F12°C. Breezy from the WSW at 11 mph17 km/h. 22% chance of drizzle throughout the day. Dry air. NightMostly cloudy, with a low around 54°F12°C. Breezy from the WSW at 10 mph16 km/h. 15% chance of drizzle throughout the night.
	TuesdayOct 6	60°F16°C	51°F11°C	0.14 in3.6 mm· 20%	57%	Showers	WNW 10 mph16 km/h
DayMostly cloudy and mild, with a high of 60°F16°C and morning low of 51°F11°C. Breezy from the WNW at 10 to 11 mph17 to 17 km/h. 20% chance of showers throughout the day. Dry air. NightMostly cloudy, with a low around 52°F11°C. Breezy from the WNW at 10 mph15 km/h. 17% chance of showers throughout the night.
	WednesdayOct 7	60°F15°C	50°F10°C Feels 46°F8°C	0.07 in1.8 mm· 21%	49%	Drizzle	WNW 10 mph15 km/h
DayMostly cloudy and mild, with a high of 60°F15°C and morning low of 50°F10°C. Breezy from the WNW at 10 to 11 mph16 to 17 km/h. 21% chance of drizzle throughout the day. Dry air. NightPartly cloudy, with a low around 50°F10°C. Breezy from the WNW at 9 to 10 mph15 to 16 km/h. 18% chance of drizzle throughout the night.

Nearby Cities

Strathroy40 mi64 km Chatham41 mi65 km Tecumseh52 mi83 km Windsor56 mi91 km London59 mi95 km LaSalle61 mi98 km

About This Forecast

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Coordinates: 42.9787°N, 82.4041°W·Elevation: 185m·Timezone: America/Toronto·Population: 72,125