Morning Showers Give Way to Sunshine and a Warm, Breezy Weekend
Wet Start, Brighter Finish Today in Thunder Bay
Thunder Bay is waking up to light rain and a temperature of 13.1°C, as observed at 7:00 AM from the airport. With a dew point equal to the temperature and 100% humidity, it’s a damp one out there — umbrellas and raincoats are a must if you’re stepping outside early. Visibility is reduced to 8 km, and the breeze is notable with east-northeast winds at 19 km/h, gusting to 32.
The barometric pressure sits at 101.2 kPa and falling, confirming what your soaked socks already know — the rain is here. Fortunately, this is a temporary splash. Rain will taper off this morning, transitioning to mainly cloudy skies with a 40% chance of lingering showers. The day will still warm up nicely to a high of 23°C, with a humidex of 26. And as the clouds begin to part, the UV index will reach 8, classified as very high, so sunscreen becomes a must if the sun peeks out this afternoon.
Winds will shift throughout the day — easing by late morning, then becoming northeast at 20 km/h this afternoon.
Tonight and Saturday: Clear Skies, Rising Temps
After the clouds and puddles, the night will be a welcome contrast — clear skies and a comfortable low of 11°C will make for ideal sleeping weather or a peaceful night under the stars.
Saturday starts sunny, with increasing cloudiness in the afternoon, but no significant rain expected during the day. Temperatures will reach a lovely 24°C, with a humidex of 26. The UV index hits 9 — very high again — so protect yourself even on partly cloudy days. Saturday night brings back some unsettled weather with cloudy skies and a 30% chance of showers, and a low of 12°C.
Sunday Outlook: Warmest Day Yet with a Shower Risk
Sunday ramps up the heat with a mix of sun and cloud, a 30% chance of showers, and a warm high of 28°C — great weather if the showers hold off, a bit muggy if they don’t. Sunday night holds at cloudy periods with a 40% chance of showers, and a mild low of 15°C.
What to Wear: Waterproof Today, Sunscreen Tomorrow
For today, think rain gear and waterproof shoes, at least until midday. Pack a light sweater for gusty breezes and a backup umbrella just in case showers linger into the afternoon. Tomorrow and Sunday are t-shirt and shorts weather, but you’ll still need sun protection and perhaps a light jacket for cooler evenings.
Thunder Bay Weather Trivia
Historically, June 27 in Thunder Bay has delivered extremes. The record high reached 30.6°C in 2002, while the record low dipped to 3.4°C back in 1965. Today’s forecast hits the sweet spot — not too hot, not too cold, and just a little soggy to start.
Did you know? Thunder Bay’s unique position on the northwestern shore of Lake Superior means it often receives localized weather systems — so even if it’s raining downtown, the sun might be shining on Mount McKay.
