Thunder Bay – Weather – What a great day to consider for Thunder Bay. The Border Cats came totally alive last night belting out enough runs to thrill the fans at Port Arthur Stadium. Red River Road has re-opened after a long closure and it looks amazing.
The city starts the day with overcast skies and cool, damp conditions, but improvements are on the horizon. Morning clouds and the slim chance of showers will give way to clearing skies as northwest winds pick up. Expect a hazy afternoon as smoke from regional wildfires lingers, along with a seasonally warm high near 22°C.
Today’s Weather Overview
Current Conditions – 6:00 AM EDT
-
Location: Thunder Bay Airport
-
Temperature: 10.2°C
-
Condition: Mostly Cloudy
-
Dew Point: 10.2°C
-
Humidity: 100%
-
Wind: WSW at 6 km/h
-
Pressure: 101.1 kPa (Rising)
-
Visibility: 24 km
Thunder Bay Forecast – Wednesday, June 11
Daytime
-
Conditions: Mainly cloudy early with a 30% chance of light showers, then clearing by late morning. Hazy conditions expected into the afternoon.
-
Wind: Northwest 20 km/h gusting to 40 km/h, beginning this morning.
-
High Temperature: 22°C
-
UV Index: 7 (High – Sun protection recommended)
Tonight
-
Conditions: Mostly clear with a few clouds.
-
Wind: Northwest 20 km/h gusting to 40, becoming light later this evening.
-
Low Temperature: 6°C
Extended Weather Forecast
Thursday, June 12
-
Conditions: A mix of sun and cloud.
-
High: 17°C
-
UV Index: 8 (Very High – Sunscreen, hats, and sunglasses strongly advised)
-
Night: Cloudy periods with a low of +4°C
Friday, June 13
-
Conditions: A mix of sun and cloud.
-
High: 17°C
-
Night: Cloudy periods with a low of +5°C
Saturday, June 14
-
Conditions: A blend of sun and cloud through the day.
-
High: 20°C
-
Night: Cloudy periods, low around 7°C
Wardrobe Recommendations
-
Today: Start with a light jacket or sweater for the cool morning. As it clears and temperatures rise into the low 20s, lighter clothing and sunglasses will be more appropriate. If you’re sensitive to air quality, consider limiting outdoor exposure during the hazy afternoon.
-
Tonight: The air will cool quickly—keep a jacket or heavier sweater handy for evening walks or stargazing.
Weather Trivia
Did You Know?
Thunder Bay often sees early morning fog or mist when dew points and temperatures match—like today’s 100% humidity. This is common near large bodies of water like Lake Superior, especially after a cool, calm night.
