Current Conditions

Alliston, Ontario

55°F13°C

Drizzle

Wind

WSW 6 mph10 km/h

Humidity

98%

Cloud Cover

79%

As of Monday, October 12, 2026 at 8:16 AM EDT

Today's Outlook

Day

Overcast and warm, with a high of 70°F21°C and morning low of 54°F12°C. Breezy from the WSW at 7 mph11 km/h.

Night

Mostly cloudy, with a low around 53°F12°C. Light wind from the SW around 5 mph8 km/h. 34% chance of drizzle overnight.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Drizzle	High 70°F21°C	Low 53°F12°C	Precip 0.02 in0.5 mm34%	Cloud 69%	Wind WSW 6 mph10 km/h	Monday: Overcast and warm, with a high of 70°F21°C and morning low of 54°F12°C. Breezy from the WSW at 7 mph11 km/h. Monday Night: Mostly cloudy, with a low around 53°F12°C. Light wind from the SW around 5 mph8 km/h. 34% chance of drizzle overnight.
Rain	High 75°F24°C	Low 60°F15°C	Precip 0.3 in7.5 mm86%	Cloud 73%	Wind WSW 9 mph14 km/h	Tuesday: Mostly cloudy and warm, with a high of 75°F24°C and morning low of 61°F16°C. Breezy from the WSW at 10 to 12 mph15 to 19 km/h. 86% chance of rain in the morning. Tuesday Night: Overcast, with a low around 60°F15°C. Breezy from the W at 8 to 10 mph12 to 16 km/h. 68% chance of light rain overnight.
Cloudy	High 59°F15°C	Low 50°F10°CFeels 46°F8°C	Precip 0.01 in0.3 mm7%	Cloud 98%	Wind NW 9 mph15 km/h	Wednesday: Overcast and mild, with a high of 57°F14°C. Breezy from the WNW at 9 to 11 mph15 to 18 km/h. Wednesday Night: Overcast, with a low around 50°F10°C. Breezy from the NW at 9 to 10 mph15 to 16 km/h.
Light Rain	High 51°F10°C	Low 42°F5°CFeels 37°F3°C	Precip 0.04 in1.1 mm37%	Cloud 92%	Wind E 8 mph12 km/h	Thursday: Overcast and mild, with a high of 51°F10°C and morning low of 42°F5°C. Breezy from the E at 7 mph11 km/h. Dry air. Thursday Night: Overcast, with a low around 44°F7°C. Breezy from the ENE at 8 to 9 mph13 to 14 km/h. 37% chance of light rain in the evening.
Light Rain	High 49°F9°CFeels 44°F7°C	Low 39°F4°CFeels 30°F-1°C	Precip 0.38 in9.6 mm88%	Cloud 83%	Wind NW 11 mph18 km/h	Friday: Overcast and cool, with a high of 49°F9°C. Breezy from the WNW at 11 to 14 mph18 to 23 km/h. 84% chance of light rain in the morning. Dry air. Friday Night: Mostly cloudy, with a low around 39°F4°C. Breezy from the NNW at 11 to 15 mph18 to 24 km/h. 88% chance of light rain overnight.
Freezing Drizzle	High 45°F7°CFeels 39°F4°C	Low 32°F0°CFeels 24°F-4°C	Precip 0.02 in0.6 mm19%	Cloud 50%	Wind WNW 12 mph19 km/h	Saturday: Mostly cloudy and cool, with a high of 45°F7°C and morning low of 32°F0°C — feels like 39°F4°C. Breezy from the WNW at 12 to 14 mph19 to 23 km/h. Very dry. Saturday Night: Partly cloudy, with a low around 33°F1°C. Frost likely. Breezy from the WNW at 11 to 14 mph18 to 22 km/h. 19% chance of freezing drizzle overnight.
Clear	High 53°F12°C	Low 33°F1°CFeels 26°F-3°C	Precip 0.01 in0.2 mm2%	Cloud 25%	Wind SSW 9 mph14 km/h	Sunday: Partly cloudy and mild, with a high of 53°F12°C and morning low of 33°F1°C. Breezy from the SSW at 8 to 9 mph13 to 15 km/h. Very dry. Sunday Night: Partly cloudy, with a low around 33°F1°C. Frost likely. Breezy from the SSW at 9 to 10 mph15 to 15 km/h.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	MondayOct 12	70°F21°C	53°F12°C	0.02 in0.5 mm· 34%	69%	Drizzle	WSW 6 mph10 km/h
DayOvercast and warm, with a high of 70°F21°C and morning low of 54°F12°C. Breezy from the WSW at 7 mph11 km/h. NightMostly cloudy, with a low around 53°F12°C. Light wind from the SW around 5 mph8 km/h. 34% chance of drizzle overnight.
	TuesdayOct 13	75°F24°C	60°F15°C	0.3 in7.5 mm· 86%	73%	Rain	WSW 9 mph14 km/h
DayMostly cloudy and warm, with a high of 75°F24°C and morning low of 61°F16°C. Breezy from the WSW at 10 to 12 mph15 to 19 km/h. 86% chance of rain in the morning. NightOvercast, with a low around 60°F15°C. Breezy from the W at 8 to 10 mph12 to 16 km/h. 68% chance of light rain overnight.
	WednesdayOct 14	59°F15°C	50°F10°C Feels 46°F8°C	0.01 in0.3 mm· 7%	98%	Cloudy	NW 9 mph15 km/h
DayOvercast and mild, with a high of 57°F14°C. Breezy from the WNW at 9 to 11 mph15 to 18 km/h. NightOvercast, with a low around 50°F10°C. Breezy from the NW at 9 to 10 mph15 to 16 km/h.
	ThursdayOct 15	51°F10°C	42°F5°C Feels 37°F3°C	0.04 in1.1 mm· 37%	92%	Light Rain	E 8 mph12 km/h
DayOvercast and mild, with a high of 51°F10°C and morning low of 42°F5°C. Breezy from the E at 7 mph11 km/h. Dry air. NightOvercast, with a low around 44°F7°C. Breezy from the ENE at 8 to 9 mph13 to 14 km/h. 37% chance of light rain in the evening.
	FridayOct 16	49°F9°C Feels 44°F7°C	39°F4°C Feels 30°F-1°C	0.38 in9.6 mm· 88%	83%	Light Rain	NW 11 mph18 km/h
DayOvercast and cool, with a high of 49°F9°C. Breezy from the WNW at 11 to 14 mph18 to 23 km/h. 84% chance of light rain in the morning. Dry air. NightMostly cloudy, with a low around 39°F4°C. Breezy from the NNW at 11 to 15 mph18 to 24 km/h. 88% chance of light rain overnight.
	SaturdayOct 17	45°F7°C Feels 39°F4°C	32°F0°C Feels 24°F-4°C	0.02 in0.6 mm· 19%	50%	Freezing Drizzle	WNW 12 mph19 km/h
DayMostly cloudy and cool, with a high of 45°F7°C and morning low of 32°F0°C — feels like 39°F4°C. Breezy from the WNW at 12 to 14 mph19 to 23 km/h. Very dry. NightPartly cloudy, with a low around 33°F1°C. Frost likely. Breezy from the WNW at 11 to 14 mph18 to 22 km/h. 19% chance of freezing drizzle overnight.
	SundayOct 18	53°F12°C	33°F1°C Feels 26°F-3°C	0.01 in0.2 mm· 2%	25%	Clear	SSW 9 mph14 km/h
DayPartly cloudy and mild, with a high of 53°F12°C and morning low of 33°F1°C. Breezy from the SSW at 8 to 9 mph13 to 15 km/h. Very dry. NightPartly cloudy, with a low around 33°F1°C. Frost likely. Breezy from the SSW at 9 to 10 mph15 to 15 km/h.
	MondayOct 19	59°F15°C	38°F4°C Feels 32°F0°C	0.02 in0.5 mm· 10%	61%	Freezing Drizzle	SSW 9 mph15 km/h
DayMostly cloudy and mild, with a high of 59°F15°C and morning low of 39°F4°C. Breezy from the SSW at 9 to 10 mph15 to 16 km/h. Dry air. NightMostly cloudy, with a low around 38°F4°C. Breezy from the SSW at 9 to 10 mph15 to 16 km/h. 10% chance of freezing drizzle overnight.
	TuesdayOct 20	61°F16°C	44°F7°C Feels 40°F5°C	0.02 in0.5 mm· 7%	46%	Partly Cloudy	WSW 7 mph11 km/h
DayPartly cloudy and mild, with a high of 61°F16°C and morning low of 44°F7°C. Light wind from the WSW around 7 mph11 km/h. Dry air. NightPartly cloudy, with a low around 45°F7°C. Breezy from the WSW at 7 to 8 mph11 to 13 km/h.
	WednesdayOct 21	60°F16°C	42°F5°C Feels 38°F3°C	0.02 in0.5 mm· 8%	47%	Partly Cloudy	S 7 mph12 km/h
DayMostly cloudy and mild, with a high of 60°F16°C and morning low of 42°F5°C. Breezy from the S at 7 to 8 mph12 to 13 km/h. Dry air. NightPartly cloudy, with a low around 42°F6°C. Breezy from the S at 7 to 8 mph12 to 13 km/h.
	ThursdayOct 22	59°F15°C	46°F8°C Feels 41°F5°C	0.11 in2.7 mm· 22%	73%	Drizzle	SSW 9 mph15 km/h
DayMostly cloudy and mild, with a high of 59°F15°C and morning low of 46°F8°C. Breezy from the SW at 9 to 10 mph15 to 16 km/h. 22% chance of drizzle in the morning. Dry air. NightMostly cloudy, with a low around 46°F8°C. Breezy from the SSW at 9 mph14 km/h. 18% chance of drizzle overnight.
	FridayOct 23	57°F14°C	46°F8°C Feels 42°F5°C	0.1 in2.6 mm· 21%	69%	Drizzle	SW 9 mph15 km/h
DayMostly cloudy and mild, with a high of 57°F14°C and morning low of 46°F8°C. Breezy from the SW at 9 to 10 mph15 to 16 km/h. 21% chance of drizzle in the morning. Dry air. NightMostly cloudy, with a low around 46°F8°C. Breezy from the SW at 9 mph14 km/h. 18% chance of drizzle overnight.
	SaturdayOct 24	55°F13°C	42°F6°C Feels 37°F3°C	0.09 in2.3 mm· 18%	65%	Drizzle	WSW 9 mph14 km/h
DayMostly cloudy and mild, with a high of 55°F13°C and morning low of 42°F6°C. Breezy from the WSW at 9 mph14 km/h. 18% chance of drizzle in the morning. Dry air. NightMostly cloudy, with a low around 43°F6°C. Breezy from the WSW at 9 mph14 km/h. 17% chance of drizzle overnight.
	SundayOct 25	54°F12°C	42°F5°C Feels 37°F3°C	0.09 in2.4 mm· 25%	64%	Drizzle	W 9 mph14 km/h
DayMostly cloudy and mild, with a high of 54°F12°C and morning low of 42°F5°C. Breezy from the W at 9 to 10 mph14 to 16 km/h. 25% chance of drizzle in the morning. Dry air. NightMostly cloudy, with a low around 42°F5°C. Breezy from the W at 8 to 9 mph13 to 14 km/h. 17% chance of drizzle overnight.
	MondayOct 26	51°F11°C	40°F5°C Feels 35°F2°C	0.07 in1.8 mm· 19%	67%	Flurries	W 8 mph13 km/h
DayMostly cloudy and mild, with a high of 51°F11°C and morning low of 40°F5°C. Breezy from the W at 8 to 9 mph13 to 14 km/h. 18% chance of drizzle in the morning. Dry air. NightMostly cloudy, with a low around 40°F5°C. Breezy from the W at 8 mph13 km/h. 19% chance of flurries overnight.

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.

WeatherMesh consistently outperforms legacy models in independent benchmarks. View Benchmarks →

Access WeatherMesh forecasts programmatically via our API. API Documentation →

How to Access Weather Forecasts

Pattern	Example	Description
/weather/{country}/{city}/	/weather/united-states/san-francisco/	City forecast (canonical URL)
/weather/{city}/	/weather/tokyo/	Shorthand — redirects to most populous match
/weather/{country}/{region}/{city}/	/weather/united-states/california/san-francisco/	With region — redirects to canonical
/weather/nearby?lat={lat}&lon={lon}	/weather/nearby?lat=48.1&lon=11.5	Find nearest city by coordinates
/weather/{country}/	/weather/germany/	Country index — all cities by region

Country and city names use lowercase slugs with hyphens (e.g. united-states, san-francisco). Arbitrary city names are supported — if not in our database, we geocode the name and serve the forecast for that location.

For programmatic access, use theWindBorne Forecast APIwhich returns structured JSON for any coordinates worldwide.

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