Thunder Bay Weather Outlook – Friday, October 17, 2025

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Lake Superior with Sleeping Giant
Lake Superior with Sleeping Giant

🌦️ Showers taper this morning as gusty southwest winds bring a mild Friday — gradual clearing into the weekend

Thunder Bay – WEATHER – It’s a damp and mild start to Friday in Thunder Bay, with light rain falling and visibility reduced to 8 km.

Temperatures are sitting around 11°C — well above seasonal — as a warm front lifts across northwestern Ontario. A few lingering showers are expected to end by late morning, followed by mostly cloudy skies and gusty southwest winds that will push afternoon highs close to 18°C.

Conditions will remain unsettled but mild through the weekend, with a mix of cloud and limited sun before showers return early next week.

🌡️ 4-Day Summary

Day Conditions High / Low Rain Chance Wind
Fri 17 Showers ending, windy 18°C / 7°C 30% SW 30–50 km/h
Sat 18 Mainly cloudy 16°C / 4°C 10% Light
Sun 19 Mix of sun and cloud, showers 15°C / 1°C 30% Light W
Mon 20 Cloudy, showers return 10°C / 3°C 60% Light SW

🌧 Current Conditions (as of 7:00 AM EDT – Thunder Bay Airport)

  • Temperature: 11.3°C

  • Dew Point: 11.3°C

  • Humidity: 100%

  • Wind: NE 8 km/h

  • Pressure: 100.7 kPa (falling)

  • Condition: Light Rain

  • Visibility: 8 km

Friday, October 17 Forecast

  • Weather: A few showers ending this morning, then cloudy with a 30% chance of isolated showers.

  • Wind: Becoming southwest 30 km/h gusting to 50 late this morning.

  • High: 18°C

  • UV Index: 2 (low)

🌙 Tonight

  • Weather: Mainly cloudy with a 30% chance of showers this evening.

  • Wind: Southwest 30 km/h, gusting to 50, becoming light late this evening.

  • Low: +7°C

🌥 Saturday, October 18

  • Weather: Mainly cloudy with periods of sunshine in the afternoon.

  • High: 16°C

  • UV Index: 2 (low)

Saturday Night:

  • Weather: Clearing.

  • Low: +4°C

🌤 Sunday, October 19

  • Weather: A mix of sun and cloud with a 30% chance of scattered showers.

  • High: 15°C

Sunday Night:

  • Weather: Clear.

  • Low: +1°C

🌦 Monday, October 20

  • Weather: Cloudy with a 60% chance of showers.

  • High: 10°C

Monday Night:

  • Weather: Cloudy with a 60% chance of showers.

  • Low: +3°C


🌬 Weather Highlights

  • Today: Morning showers ending; windy and mild this afternoon.

  • Tonight: Breezy early, clearing skies overnight.

  • Weekend: Pleasantly mild with light winds and dry breaks Saturday and Sunday.

  • Next Week: Cooler and wetter pattern returns Monday with increasing rain chances.

🧥 Wardrobe & Travel Tips

  • Today: Keep a light rain jacket handy; gusty winds may make it feel cooler than 18°C.

  • Weekend: Great for outdoor plans — comfortable highs near 15°C and mostly dry skies.

  • Next Week: Have rain gear ready as another front moves in Monday.


Showers fade as winds rise in Thunder Bay today — a mild and mostly dry weekend follows before rain returns Monday. – NetNewsLedger Weather Desk

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