Clouds Linger Early, but Summer’s Subtle Warmth Returns
Damp Start with a Dry and Sunny Finish
Thunder Bay is off to a damp but calm start this Wednesday morning, with temperatures sitting at a cool 10.7°C as of 8:00 AM. Skies are mostly cloudy, but don’t let that fool you — today’s forecast promises plenty of sunshine as the morning rolls along. The humidity is maxed out at 100%, giving the air a moist, almost rainforest-like feel (minus the parrots), and there’s not much movement in the air with a light west-southwest wind at 6 km/h.
Visibility is excellent at 32 km, and the barometric pressure is 102.4 kPa and rising, signalling that more settled weather is right around the corner.
Expect the skies to clear steadily throughout the morning, making way for a mix of sun and cloud this afternoon. Temperatures will rise to a comfortable high of 22°C, with a humidex of 25 adding a hint of summer warmth. The UV index will soar to 9, rated very high, so even if clouds hang around, make sure you’re protected — that northern sun doesn’t pull punches.
Tonight Through Saturday: Mostly Mild with a Mix of Skies
Tonight will be partly cloudy, with a mild low of 12°C, offering ideal conditions for sleeping or sitting out late on the deck.
Thursday brings mainly sunny skies and slightly cooler air with a high of 21°C. The evening becomes cloudy, but temperatures remain mild with another overnight low of 12°C.
Friday stays on the cloudier side, with a steady high of 21°C and continued cloud cover into the night, dipping to 11°C. While not exactly beach weather, it’s dry, comfortable, and definitely pleasant for summer outings.
Saturday offers a bit more variety with a mix of sun and cloud and a high of 22°C, followed by cloudy periods Saturday night and a 30% chance of showers, with a low of 14°C.
What to Wear: Morning Layers, Afternoon Sun Gear
This morning, a warm jacket or hoodie is a must — that humidity-laced chill will linger until the sun takes charge. By mid-morning, a light t-shirt or breathable layer will serve you well. Be sure to apply sunscreen, as the UV index is in the “don’t skip it” range. Sunglasses and a brimmed hat are also a wise call, especially if you’re spending time near the water or on the trails.
Climate Snapshot & Local Trivia
June 25th in Thunder Bay history has delivered both sizzle and shiver — with record highs topping 32.8°C and lows dipping to 4.4°C. Today’s forecast of 22°C lands comfortably in the “just right” range — not too hot, not too cold, and definitely not boring.
Did you know? Thunder Bay enjoys more than 2,200 hours of sunshine per year, making it one of the sunniest cities in Ontario — even when it likes to play shy with morning fog and low cloud.
