Thunder Bay Weather Outlook – Thursday, October 16, 2025

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CN Rail grain cars in Thunder Bay
CN Rail grain cars in Thunder Bay

🌤️ A frosty start gives way to cloud and rain — mild and unsettled heading into the weekend

Thunder Bay – WEATHER – Thunder Bay is waking to clear and chilly conditions this morning, with the temperature sitting near -1°C and light winds producing a brief wind chill near -2°C. Early fog patches are dissipating, but skies will cloud over by late morning, and showers are expected to begin this afternoon as a low-pressure system tracks across the region.

Temperatures will rebound sharply through the day, reaching the low teens. A period of showers tonight and early Friday will give way to mostly cloudy skies, before a drier, sunnier weekend returns.

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

  • Temperature: -1.0°C

  • Dew Point: -1.1°C

  • Humidity: 99%

  • Wind: WSW 4 km/h

  • Wind Chill: -2°C

  • Pressure: 102.6 kPa (falling)

  • Condition: Clear

  • Visibility: 24 km

Thursday, October 16 Forecast

  • Weather: Increasing cloudiness with showers beginning this afternoon.

  • Fog patches dissipating this morning.

  • Wind: Becoming southeast 20 km/h late this morning.

  • High: 13°C

  • UV Index: 3 (moderate)

🌙 Tonight

  • Weather: Showers continuing.

  • Low: +10°C

🌧️ Friday, October 17

  • Weather: Showers ending in the morning, then cloudy with a 40% chance of scattered showers.

  • Wind: Becoming south 20 km/h gusting to 40 late in the morning.

  • High: 18°C

  • UV Index: 2 (low)

Friday Night:

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

  • Low: +10°C

🌦 Saturday, October 18

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

  • High: 16°C

Saturday Night:

  • Weather: Clear.

  • Low: +2°C

🌞 Sunday, October 19

  • Weather: Sunny and pleasant.

  • High: 13°C

Sunday Night:

  • Weather: Cloudy periods with a 30% chance of showers.

  • Low: +3°C


🌬️ Weather Highlights

  • This morning: Frosty but calm under clear skies — expect slick spots on untreated surfaces.

  • Today: Cloud cover increases with rain developing by mid-afternoon.

  • Friday: Mild and breezy with showers lingering into early morning.

  • Weekend: Sunshine returns, offering a comfortable and dry finish to the week.


🌦 4-Day Summary

Day Conditions High / Low Rain Chance Wind
Thu 16 Cloudy, showers developing 13°C / 10°C 80% PM SE 20 km/h
Fri 17 Showers early, mild & windy 18°C / 10°C 60% S 20–40 km/h
Sat 18 Mix of sun & cloud, mild 16°C / 2°C 30% Light
Sun 19 Sunny and calm 13°C / 3°C 30% Night Light W

🧥 Wardrobe & Travel Tips

  • Morning: Dress warmly — below-freezing start before temperatures rebound.

  • Afternoon: Carry rain gear as showers develop.

  • Weekend: Lighter layers will do — sunny and seasonable temperatures expected.

A frosty, calm morning gives way to cloud and rain this afternoon — mild, breezy weather follows before a sunny weekend returns to Thunder Bay. – NetNewsLedger Weather Desk

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