Current Conditions

Alliston, Ontario

76°F24°C

Clear

Wind

NW 6 mph10 km/h

Humidity

36%

Cloud Cover

19%

As of Thursday, July 23, 2026 at 3:55 PM EDT

Today's Outlook

Day

Mostly clear and warm, with a high of 76°F24°C. Light wind from the WNW around 6 mph10 km/h. Dry air.

Night

Mostly clear, with a low around 59°F15°C. Light wind from the NNW around 4 mph6 km/h.

7-Day Forecast

Day	Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
ThursdayJul 23	Clear	High 76°F24°C	Low 59°F15°C	Precip 0 in0 mm—	Cloud 11%	Wind NW 5 mph8 km/h	Thursday: Mostly clear and warm, with a high of 76°F24°C. Light wind from the WNW around 6 mph10 km/h. Dry air. Thursday Night: Mostly clear, with a low around 59°F15°C. Light wind from the NNW around 4 mph6 km/h.
FridayJul 24	Clear	High 81°F27°C	Low 50°F10°C	Precip 0 in0 mm—	Cloud 7%	Wind S 5 mph8 km/h	Friday: Mostly clear and warm, with a high of 81°F27°C and morning low of 60°F16°C. Light wind from the SSE around 5 mph7 km/h. Dry air. Friday Night: Mostly clear, with a low around 50°F10°C. Breezy from the S at 5 to 7 mph9 to 11 km/h.
SaturdayJul 25	Drizzle	High 82°F28°C	Low 55°F13°C	Precip 0.01 in0.3 mm11%	Cloud 55%	Wind SSW 5 mph8 km/h	Saturday: Mostly cloudy and warm, with a high of 82°F28°C and morning low of 64°F18°C. Breezy from the SSW at 5 to 7 mph9 to 12 km/h. Saturday Night: Partly cloudy, with a low around 55°F13°C. Light wind from the SSW around 4 mph7 km/h. 11% chance of drizzle in the evening.
SundayJul 26	Showers	High 81°F27°C	Low 62°F17°C	Precip 0.13 in3.2 mm58%	Cloud 38%	Wind W 5 mph8 km/h	Sunday: Partly cloudy and warm, with a high of 81°F27°C and morning low of 68°F20°C. Light wind from the WNW around 5 mph8 km/h. 58% chance of showers throughout the day. Sunday Night: Partly cloudy, with a low around 62°F17°C. Light wind from the W around 4 mph7 km/h. 30% chance of showers in the evening.
MondayJul 27	Showers	High 81°F27°C	Low 61°F16°C	Precip 0.16 in4.1 mm50%	Cloud 60%	Wind SW 4 mph7 km/h	Monday: Mostly cloudy and warm, with a high of 81°F27°C and morning low of 66°F19°C. Light wind from the WSW around 4 mph7 km/h. 50% chance of showers throughout the day. Monday Night: Mostly cloudy, with a low around 61°F16°C. Light wind from the SW around 5 mph7 km/h. 32% chance of showers throughout the night.
TuesdayJul 28	Showers	High 74°F24°C	Low 65°F18°C	Precip 0.43 in10.9 mm58%	Cloud 65%	Wind NNW 7 mph12 km/h	Tuesday: Mostly cloudy and warm, with a high of 74°F24°C and morning low of 67°F20°C. Breezy from the NNW at 7 to 10 mph12 to 16 km/h. 58% chance of light rain throughout the day. Tuesday Night: Mostly cloudy, with a low around 65°F18°C. Breezy from the NW at 7 to 9 mph12 to 14 km/h. 51% chance of showers throughout the night.
WednesdayJul 29	Drizzle	High 74°F23°C	Low 60°F15°C	Precip 0.07 in1.8 mm13%	Cloud 31%	Wind NNW 9 mph14 km/h	Wednesday: Partly cloudy and warm, with a high of 74°F23°C and morning low of 63°F17°C. Breezy from the NNW at 10 to 11 mph16 to 17 km/h. 13% chance of drizzle throughout the day. Wednesday Night: Partly cloudy, with a low around 60°F15°C. Breezy from the NNW at 8 mph13 km/h.

15-Day Forecast

	Day	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Condition	Wind (mph)
	ThursdayJul 23	76°F24°C	59°F15°C	0 in0 mm· —	11%	Clear	NW 5 mph8 km/h
DayMostly clear and warm, with a high of 76°F24°C. Light wind from the WNW around 6 mph10 km/h. Dry air. NightMostly clear, with a low around 59°F15°C. Light wind from the NNW around 4 mph6 km/h.
	FridayJul 24	81°F27°C	50°F10°C	0 in0 mm· —	7%	Clear	S 5 mph8 km/h
DayMostly clear and warm, with a high of 81°F27°C and morning low of 60°F16°C. Light wind from the SSE around 5 mph7 km/h. Dry air. NightMostly clear, with a low around 50°F10°C. Breezy from the S at 5 to 7 mph9 to 11 km/h.
	SaturdayJul 25	82°F28°C	55°F13°C	0.01 in0.3 mm· 11%	55%	Drizzle	SSW 5 mph8 km/h
DayMostly cloudy and warm, with a high of 82°F28°C and morning low of 64°F18°C. Breezy from the SSW at 5 to 7 mph9 to 12 km/h. NightPartly cloudy, with a low around 55°F13°C. Light wind from the SSW around 4 mph7 km/h. 11% chance of drizzle in the evening.
	SundayJul 26	81°F27°C	62°F17°C	0.13 in3.2 mm· 58%	38%	Showers	W 5 mph8 km/h
DayPartly cloudy and warm, with a high of 81°F27°C and morning low of 68°F20°C. Light wind from the WNW around 5 mph8 km/h. 58% chance of showers throughout the day. NightPartly cloudy, with a low around 62°F17°C. Light wind from the W around 4 mph7 km/h. 30% chance of showers in the evening.
	MondayJul 27	81°F27°C	61°F16°C	0.16 in4.1 mm· 50%	60%	Showers	SW 4 mph7 km/h
DayMostly cloudy and warm, with a high of 81°F27°C and morning low of 66°F19°C. Light wind from the WSW around 4 mph7 km/h. 50% chance of showers throughout the day. NightMostly cloudy, with a low around 61°F16°C. Light wind from the SW around 5 mph7 km/h. 32% chance of showers throughout the night.
	TuesdayJul 28	74°F24°C	65°F18°C	0.43 in10.9 mm· 58%	65%	Showers	NNW 7 mph12 km/h
DayMostly cloudy and warm, with a high of 74°F24°C and morning low of 67°F20°C. Breezy from the NNW at 7 to 10 mph12 to 16 km/h. 58% chance of light rain throughout the day. NightMostly cloudy, with a low around 65°F18°C. Breezy from the NW at 7 to 9 mph12 to 14 km/h. 51% chance of showers throughout the night.
	WednesdayJul 29	74°F23°C	60°F15°C	0.07 in1.8 mm· 13%	31%	Drizzle	NNW 9 mph14 km/h
DayPartly cloudy and warm, with a high of 74°F23°C and morning low of 63°F17°C. Breezy from the NNW at 10 to 11 mph16 to 17 km/h. 13% chance of drizzle throughout the day. NightPartly cloudy, with a low around 60°F15°C. Breezy from the NNW at 8 mph13 km/h.
	ThursdayJul 30	78°F26°C	56°F13°C	0.04 in1.1 mm· 16%	27%	Drizzle	NW 7 mph11 km/h
DayPartly cloudy and warm, with a high of 78°F26°C and morning low of 62°F17°C. Breezy from the NW at 7 to 8 mph12 to 13 km/h. 16% chance of drizzle throughout the day. NightMostly clear, with a low around 56°F13°C. Light wind from the NW around 6 mph10 km/h. 13% chance of drizzle in the evening.
	FridayJul 31	80°F27°C	60°F15°C	0.11 in2.8 mm· 28%	43%	Showers	W 6 mph10 km/h
DayPartly cloudy and warm, with a high of 80°F27°C and morning low of 65°F18°C. Breezy from the W at 7 mph11 km/h. 28% chance of showers throughout the day. NightPartly cloudy, with a low around 60°F15°C. Light wind from the W around 6 mph10 km/h. 24% chance of showers throughout the night.
	SaturdayAug 1	79°F26°C	61°F16°C	0.11 in2.8 mm· 28%	47%	Showers	WNW 6 mph10 km/h
DayMostly cloudy and warm, with a high of 79°F26°C and morning low of 65°F18°C. Breezy from the WNW at 7 to 8 mph11 to 12 km/h. 28% chance of showers throughout the day. NightPartly cloudy, with a low around 61°F16°C. Light wind from the W around 6 mph9 km/h. 23% chance of drizzle throughout the night.
	SundayAug 2	79°F26°C	60°F16°C	0.09 in2.2 mm· 29%	47%	Showers	W 6 mph10 km/h
DayMostly cloudy and warm, with a high of 79°F26°C and morning low of 64°F18°C. Breezy from the W at 7 to 8 mph11 to 13 km/h. 29% chance of showers throughout the day. NightPartly cloudy, with a low around 60°F16°C. Light wind from the W around 6 mph9 km/h. 19% chance of drizzle throughout the night.
	MondayAug 3	80°F27°C	61°F16°C	0.09 in2.4 mm· 27%	51%	Showers	WSW 7 mph11 km/h
DayMostly cloudy and warm, with a high of 80°F27°C and morning low of 65°F18°C. Breezy from the W at 7 to 8 mph11 to 13 km/h. 27% chance of showers throughout the day. NightPartly cloudy, with a low around 61°F16°C. Light wind from the WSW around 6 mph10 km/h. 18% chance of drizzle throughout the night.
	TuesdayAug 4	80°F27°C	62°F17°C	0.1 in2.5 mm· 29%	51%	Showers	WSW 7 mph11 km/h
DayMostly cloudy and warm, with a high of 80°F27°C and morning low of 66°F19°C. Breezy from the WSW at 7 to 8 mph12 to 13 km/h. 29% chance of showers throughout the day. NightPartly cloudy, with a low around 62°F17°C. Light wind from the WSW around 6 mph10 km/h. 15% chance of drizzle throughout the night.
	WednesdayAug 5	78°F26°C	62°F17°C	0.13 in3.4 mm· 27%	54%	Showers	W 7 mph11 km/h
DayMostly cloudy and warm, with a high of 78°F26°C and morning low of 66°F19°C. Breezy from the W at 7 to 8 mph12 to 13 km/h. 27% chance of showers throughout the day. NightMostly cloudy, with a low around 62°F17°C. Light wind from the WSW around 6 mph10 km/h. 22% chance of showers throughout the night.
	ThursdayAug 6	78°F25°C	61°F16°C	0.13 in3.4 mm· 33%	53%	Showers	W 6 mph10 km/h
DayMostly cloudy and warm, with a high of 78°F25°C and morning low of 65°F18°C. Breezy from the W at 7 to 8 mph11 to 12 km/h. 33% chance of showers throughout the day. NightMostly cloudy, with a low around 61°F16°C. Light wind from the W around 6 mph9 km/h. 27% chance of showers throughout the night.

Nearby Cities

Innisfil15 mi24 km Bolton20 mi32 km Orangeville20 mi32 km Barrie20 mi32 km Caledon21 mi33 km Keswick21 mi34 km

About This Forecast

This forecast is powered by WeatherMesh, the world's most advanced and accurate weather model powered by AI. WeatherMesh is built on proprietary data from WindBorne's Global Sounding Balloon constellation — the world's largest fleet of autonomous, long-duration weather balloons — collecting observations across 100% of Earth, including over oceans and remote regions where no other data exists.

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Coordinates: 44.1501°N, 79.8663°W·Elevation: 223m·Timezone: America/Toronto·Population: 18,809