Thunder Bay – Weather Desk – As summer enters its final weeks, Northwestern Ontario is enjoying a warm and dynamic weather pattern, with a blend of sunshine, clouds, and light chances of showers.

Here’s your comprehensive weekend outlook for Thunder Bay, Kenora, Dryden, and surrounding areas to help you plan your outdoor adventures, travel, or relaxation by the lake.

Remember, if you are boating, on your ATV, or driving that alcohol and cannabis do not mix well with those activities. Drive to arrive alive!

🔆 Friday, August 15, 2025

Thunder Bay

• Morning: Mostly cloudy with fog patches dissipating early.

• Afternoon: Mix of sun and cloud. 40% chance of showers and risk of a thunderstorm.

• Winds: Southeast 20 km/h, gusting to 40.

• High: 19°C

• UV Index: 7 (High)

• Tonight: Mainly cloudy, 40% chance of showers. Low: 14°C.

Kenora & Lake of the Woods

• Morning: Sunny, becoming mixed later.

• Afternoon: 30% chance of showers.

• Winds: West 20 km/h, gusting to 40.

• High: 23°C (Humidex 28)

• UV Index: 7 (High)

• Tonight: Partly cloudy, 30% chance of early evening showers. Low: 10°C.

Dryden & Vermilion Bay

• Morning: Clear skies transitioning to mixed skies.

• Afternoon: 30% chance of showers.

• Winds: West 20 km/h, gusting to 40.

• High: 23°C (Humidex 30)

• UV Index: 7 (High)

• Tonight: Partly cloudy, early chance of showers. Low: 9°C.

🌥️ Saturday, August 16, 2025

• Thunder Bay: Sunny. High: 25°C. Low: 8°C (Clear at night).

• Kenora: Mainly cloudy. High: 21°C. Low: 12°C (Clear at night).

• Dryden: Mainly cloudy. High: 20°C. Low: 10°C (Clear at night).

Sun protection is still important with UV indices around 6 or higher across the region.

☀️ Sunday, August 17, 2025

• Thunder Bay: Sunny and cooler. High: 19°C. Low: 7°C (Cloudy periods overnight with 30% chance of showers).

• Kenora: Sunny. High: 24°C. Low: 16°C (Cloudy periods at night).

• Dryden: Sunny. High: 22°C. Low: 12°C (Cloudy periods overnight).

A perfect day across the board for hiking, boating, fishing, or a relaxing BBQ.

🌤️ Monday, August 18, 2025

• Thunder Bay: Forecast not yet released.

• Kenora: Mix of sun and cloud. High: 24°C. Low: 16°C.

• Dryden: Cloudy. High: 22°C. Low: 15°C.

Wardrobe Recommendations

• Today (Friday): Light layers and a waterproof option are advised with warm temperatures and chance of rain.

• Saturday: A bit cooler—long sleeves or a hoodie might be needed in the morning or evening.

• Sunday: Perfect summer weather! T-shirts, sunglasses, and sunscreen.

• Evenings: Expect cool overnights—light jackets or sweaters will be comfortable.

Regional Weather Trivia

Fun Fact: Despite their proximity, Thunder Bay tends to run several degrees cooler than Dryden and Kenora during summer due to lake-effect moderation from Lake Superior. Kenora and Dryden often feel hotter, especially when humidex values climb!