Current Conditions

Thunder Bay, Ontario

63°F17°C

Partly Cloudy

Wind

N 4 mph6 km/h

Humidity

83%

Cloud Cover

27%

As of Wednesday, September 2, 2026 at 10:34 PM EDT

Today's Outlook

Night

Partly cloudy, with a low around 58°F14°C. Light wind from the NE around 4 mph7 km/h.

7-Day Forecast

Condition	High (°F)	Low (°F)	Precip (mm)	Cloud Cover (%)	Wind (mph)
Partly Cloudy	High 68°F20°C	Low 57°F14°C	Precip 0 in0.1 mm2%	Cloud 45%	Wind ENE 5 mph8 km/h	Thursday: Mostly cloudy and warm, with a high of 68°F20°C and morning low of 57°F14°C. Light wind from the E around 6 mph9 km/h. Thursday Night: Partly cloudy, with a low around 58°F14°C. Light wind from the NE around 4 mph7 km/h.
Showers	High 67°F19°C	Low 59°F15°C	Precip 0.06 in1.4 mm28%	Cloud 54%	Wind E 7 mph12 km/h	Friday: Mostly cloudy and mild, with a high of 67°F19°C and morning low of 60°F15°C. Breezy from the E at 9 to 10 mph15 to 16 km/h. 28% chance of showers throughout the day. Friday Night: Mostly cloudy, with a low around 59°F15°C. Breezy from the E at 6 to 8 mph9 to 12 km/h. 10% chance of drizzle before dawn.
Partly Cloudy	High 69°F20°C	Low 59°F15°C	Precip 0.01 in0.2 mm3%	Cloud 42%	Wind E 5 mph8 km/h	Saturday: Partly cloudy and warm, with a high of 69°F20°C and morning low of 59°F15°C. Light wind from the E around 6 mph9 km/h. Saturday Night: Partly cloudy, with a low around 59°F15°C. Light wind from the E around 4 mph7 km/h.
Drizzle	High 69°F21°C	Low 59°F15°C	Precip 0.04 in1 mm12%	Cloud 72%	Wind ESE 5 mph7 km/h	Sunday: Overcast and warm, with a high of 69°F21°C and morning low of 59°F15°C. Light wind from the SE around 5 mph8 km/h. 11% chance of drizzle in the afternoon. Sunday Night: Mostly cloudy, with a low around 59°F15°C. Light wind from the E around 4 mph7 km/h. 12% chance of drizzle in the evening.
Light Rain	High 63°F17°C	Low 60°F15°C	Precip 0.13 in3.4 mm31%	Cloud 92%	Wind ENE 9 mph15 km/h	Monday: Overcast and mild, with a high of 63°F17°C. Breezy from the ENE at 10 to 12 mph16 to 19 km/h. 26% chance of drizzle throughout the day. Monday Night: Overcast, with a low around 60°F15°C. Breezy from the ENE at 9 to 12 mph14 to 20 km/h. 31% chance of light rain throughout the night.
Rain	High 66°F19°C	Low 60°F15°C	Precip 0.56 in14.3 mm69%	Cloud 90%	Wind SSE 12 mph19 km/h	Tuesday: Overcast and mild, with a high of 66°F19°C and morning low of 61°F16°C. Breezy from the SSE at 12 to 13 mph20 to 21 km/h. 69% chance of rain throughout the day. Tuesday Night: Overcast, with a low around 60°F15°C. Breezy from the SSE at 11 to 13 mph18 to 21 km/h. 61% chance of rain throughout the night.
Showers	High 72°F22°C	Low 63°F17°C	Precip 0.11 in2.7 mm27%	Cloud 57%	Wind WSW 10 mph16 km/h	Wednesday: Mostly cloudy and warm, with a high of 72°F22°C and morning low of 63°F17°C. Breezy from the WSW at 11 to 12 mph17 to 20 km/h. 16% chance of drizzle throughout the day. Wednesday Night: Mostly cloudy, with a low around 63°F17°C. Breezy from the WSW at 9 to 10 mph15 to 17 km/h. 27% chance of showers throughout the night.

15-Day Forecast

	Day	High	Low	Precip	Cloud Cover	Condition	Wind
	ThursdaySep 3	68°F20°C	57°F14°C	0 in0.1 mm· 2%	45%	Partly Cloudy	ENE 5 mph8 km/h
DayMostly cloudy and warm, with a high of 68°F20°C and morning low of 57°F14°C. Light wind from the E around 6 mph9 km/h. NightPartly cloudy, with a low around 58°F14°C. Light wind from the NE around 4 mph7 km/h.
	FridaySep 4	67°F19°C	59°F15°C	0.06 in1.4 mm· 28%	54%	Showers	E 7 mph12 km/h
DayMostly cloudy and mild, with a high of 67°F19°C and morning low of 60°F15°C. Breezy from the E at 9 to 10 mph15 to 16 km/h. 28% chance of showers throughout the day. NightMostly cloudy, with a low around 59°F15°C. Breezy from the E at 6 to 8 mph9 to 12 km/h. 10% chance of drizzle before dawn.
	SaturdaySep 5	69°F20°C	59°F15°C	0.01 in0.2 mm· 3%	42%	Partly Cloudy	E 5 mph8 km/h
DayPartly cloudy and warm, with a high of 69°F20°C and morning low of 59°F15°C. Light wind from the E around 6 mph9 km/h. NightPartly cloudy, with a low around 59°F15°C. Light wind from the E around 4 mph7 km/h.
	SundaySep 6	69°F21°C	59°F15°C	0.04 in1 mm· 12%	72%	Drizzle	ESE 5 mph7 km/h
DayOvercast and warm, with a high of 69°F21°C and morning low of 59°F15°C. Light wind from the SE around 5 mph8 km/h. 11% chance of drizzle in the afternoon. NightMostly cloudy, with a low around 59°F15°C. Light wind from the E around 4 mph7 km/h. 12% chance of drizzle in the evening.
	MondaySep 7	63°F17°C	60°F15°C	0.13 in3.4 mm· 31%	92%	Light Rain	ENE 9 mph15 km/h
DayOvercast and mild, with a high of 63°F17°C. Breezy from the ENE at 10 to 12 mph16 to 19 km/h. 26% chance of drizzle throughout the day. NightOvercast, with a low around 60°F15°C. Breezy from the ENE at 9 to 12 mph14 to 20 km/h. 31% chance of light rain throughout the night.
	TuesdaySep 8	66°F19°C	60°F15°C	0.56 in14.3 mm· 69%	90%	Rain	SSE 12 mph19 km/h
DayOvercast and mild, with a high of 66°F19°C and morning low of 61°F16°C. Breezy from the SSE at 12 to 13 mph20 to 21 km/h. 69% chance of rain throughout the day. NightOvercast, with a low around 60°F15°C. Breezy from the SSE at 11 to 13 mph18 to 21 km/h. 61% chance of rain throughout the night.
	WednesdaySep 9	72°F22°C	63°F17°C	0.11 in2.7 mm· 27%	57%	Showers	WSW 10 mph16 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 11 to 12 mph17 to 20 km/h. 16% chance of drizzle throughout the day. NightMostly cloudy, with a low around 63°F17°C. Breezy from the WSW at 9 to 10 mph15 to 17 km/h. 27% chance of showers throughout the night.
	ThursdaySep 10	67°F20°C	60°F15°C	0.13 in3.2 mm· 19%	60%	Showers	WNW 9 mph15 km/h
DayMostly cloudy and mild, with a high of 67°F20°C and morning low of 60°F15°C. Breezy from the WNW at 10 mph16 km/h. 19% chance of showers throughout the day. NightMostly cloudy, with a low around 60°F16°C. Breezy from the WNW at 9 mph14 km/h. 17% chance of drizzle throughout the night.
	FridaySep 11	66°F19°C	57°F14°C	0.14 in3.5 mm· 22%	61%	Showers	WSW 9 mph15 km/h
DayMostly cloudy and mild, with a high of 66°F19°C and morning low of 57°F14°C. Breezy from the SW at 10 to 11 mph16 to 17 km/h. 22% chance of showers throughout the day. NightMostly cloudy, with a low around 57°F14°C. Breezy from the W at 9 mph14 km/h. 15% chance of showers throughout the night.
	SaturdaySep 12	65°F18°C	57°F14°C	0.18 in4.6 mm· 24%	70%	Showers	WSW 10 mph16 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 to 11 mph16 to 17 km/h. 23% chance of light rain throughout the day. NightMostly cloudy, with a low around 57°F14°C. Breezy from the WSW at 9 to 10 mph15 to 16 km/h. 24% chance of showers throughout the night.
	SundaySep 13	65°F18°C	56°F13°C	0.15 in3.7 mm· 22%	64%	Showers	WSW 10 mph16 km/h
DayMostly cloudy and mild, with a high of 65°F18°C and morning low of 56°F13°C. Breezy from the SW at 11 mph17 km/h. 22% chance of drizzle throughout the day. NightMostly cloudy, with a low around 57°F14°C. Breezy from the W at 9 to 10 mph15 to 15 km/h. 21% chance of showers throughout the night.
	MondaySep 14	64°F18°C	55°F13°C	0.13 in3.2 mm· 19%	56%	Showers	W 10 mph16 km/h
DayMostly cloudy and mild, with a high of 64°F18°C and morning low of 55°F13°C. Breezy from the W at 11 mph17 km/h. 19% chance of showers throughout the day. Dry air. NightMostly cloudy, with a low around 56°F13°C. Breezy from the W at 9 to 10 mph15 to 16 km/h. 19% chance of drizzle throughout the night.
	TuesdaySep 15	65°F18°C	54°F12°C	0.07 in1.9 mm· 13%	49%	Drizzle	WSW 9 mph15 km/h
DayMostly cloudy and mild, with a high of 65°F18°C and morning low of 54°F12°C. Breezy from the WSW at 10 to 11 mph16 to 17 km/h. 13% chance of drizzle throughout the day. Dry air. NightPartly cloudy, with a low around 55°F13°C. Breezy from the WSW at 9 mph14 km/h. 13% chance of drizzle throughout the night.
	WednesdaySep 16	64°F18°C	54°F12°C	0.11 in2.8 mm· 21%	55%	Drizzle	WSW 10 mph16 km/h
DayMostly cloudy and mild, with a high of 64°F18°C and morning low of 54°F12°C. Breezy from the WSW at 10 to 11 mph17 to 18 km/h. 21% chance of drizzle throughout the day. Dry air. NightPartly cloudy, with a low around 55°F13°C. Breezy from the WSW at 9 mph15 km/h. 16% chance of drizzle throughout the night.
	ThursdaySep 17	64°F18°C	54°F12°C	0.11 in2.9 mm· 19%	58%	Showers	W 10 mph16 km/h
DayMostly cloudy and mild, with a high of 64°F18°C and morning low of 54°F12°C. Breezy from the W at 11 mph17 km/h. 19% chance of showers throughout the day. Dry air. NightMostly cloudy, with a low around 55°F13°C. Breezy from the WSW at 10 mph16 km/h. 18% chance of showers throughout the night.

Nearby Cities

Kenora256 mi411 km Sault Ste. Marie263 mi424 km Steinbach346 mi557 km Timmins363 mi584 km Fort Garry South371 mi597 km Winnipeg372 mi598 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: 48.3820°N, 89.2502°W·Elevation: 188m·Timezone: America/Toronto·Population: 108,843