THUNDER BAY – WEATHER – Monday morning is starting wet and cool across Thunder Bay, with light rain reported at Thunder Bay Airport and a damp northeast breeze adding to the early-day chill. Environment Canada’s 5:30 AM forecast calls for fog patches to dissipate this morning, followed by mainly cloudy skies and a late-day chance of showers.
Today’s Weather Overview
Current Conditions
At 8:31 AM EDT, Thunder Bay Airport was reporting light rain and a temperature of 12.9°C. The dew point was 10.5°C, with humidity at 85 percent, keeping the morning air moist and cool. Winds were from the east-northeast at 13 km/h, visibility was 32 km, and the barometric pressure was 101.7 kPa and rising.
For the rest of Monday, expect mainly cloudy skies with a 40 percent chance of showers late this afternoon. Morning fog patches are expected to dissipate, and the daytime high should reach 19°C. Despite the cloud cover, the UV index is 8, or very high, so sun protection is still important during brighter breaks.
Tonight turns more unsettled. Skies remain cloudy, with a 40 percent chance of showers this evening, followed by a few showers beginning late this evening. There is also a risk of a thunderstorm late this evening and overnight, with the temperature falling to 10°C.
Tomorrow’s Forecast
Expected Conditions
Tuesday, June 9: Thunder Bay will remain mainly cloudy, with a 60 percent chance of showers early in the morning. The high will reach 23°C, with a humidex of 26 and a UV index of 7, or high. Tuesday night brings cloudy periods and a low of 12°C.
Wednesday, June 10: Expect cloudy skies with a 30 percent chance of showers and a high of 21°C. Wednesday night becomes more unsettled again, with cloudy skies and a 60 percent chance of showers. The low will be 14°C.
Thursday, June 11: The cloudy and showery pattern continues, with a 30 percent chance of showers and a high near 21°C. Thursday night also carries a 30 percent chance of showers, with a low of 13°C.
Looking toward the end of the week, Friday and Saturday both carry a 30 percent chance of showers, with highs near 22°C, before Sunday trends drier with a mix of sun and cloud and a high near 20°C.
Wardrobe Recommendations
Monday is a rain jacket and closed-toe footwear day, especially for the morning and again later this evening. The temperature is not cold, but the light rain, humidity, and east-northeast breeze will make it feel cooler than the thermometer suggests.
Keep an umbrella or waterproof shell handy tonight, and avoid relying on a heavy winter-style layer. A light sweater under a rain jacket should be enough for most of the day. With the UV index rated very high, sunglasses and sunscreen are still worthwhile if the clouds thin out.
Weather Trivia
Fog patches often form when moist air near the ground cools enough for water vapour to condense into tiny droplets. In Thunder Bay, the combination of Lake Superior’s influence, cool overnight air, and light rain can make fog more likely during early June mornings.
