From a Bright Start to Soaking Skies: What to Expect in Thunder Bay
Monday, June 16 – Sunshine Early, Thunderstorms Brewing by Nightfall
Good morning, Thunder Bay! Today is starting off with that quintessential early summer glow. The temperature sits at 10.7°C, with a gentle westerly breeze at 4 km/h and a moisture-laden humidity of 87%. Visibility is excellent at 32 km, and barometric pressure sits at 101.6 kPa, though falling – a classic sign that Mother Nature has a mood swing in mind.
Skies will feature a mix of sun and cloud, and the afternoon brings a pleasant high of 21°C. It’s a perfect time to enjoy the outdoors – just don’t forget the UV protection: with a UV index of 9, sunburns can sneak up on even the most seasoned Canadians faster than you can say “sunscreen.”
Tonight – Grab the Umbrella and Maybe a Canoe?
By evening, the mood shifts drastically as showers move in, bringing with them a risk of thunderstorms. The local rainfall amount is expected to reach 20 to 30 mm, so whether you’re camping or commuting, waterproof is the way to go. Winds will pick up from the east at 20 km/h by late evening, ushering in that dramatic weather. Overnight low temperatures will dip to a mild 12°C.
Tuesday, June 17 – Cloudy with Showers and Sticky Conditions
Tuesday keeps the weather pot simmering with cloudy skies and a 40% chance of showers. The morning may offer some relief, but the unsettled trend continues into the afternoon. Winds will shift, coming from the northwest at 20 km/h, hopefully helping to dry things out a bit. It’ll be warmer too, with a high of 23°C, and with the humidity, it’ll feel like 28°C. The UV index eases slightly to 7, but still warrants sunscreen if the sun peeks through.
Tuesday night offers a calmer atmosphere, with cloudy periods and a low of 11°C.
Wednesday, June 18 – Sun Peeks Back In
By midweek, we’ll see a mix of sun and cloud, with a comfortable high of 22°C. The evening brings a 30% chance of showers, so it might be smart to keep the umbrella on standby. The nighttime low will again hover around 11°C, setting up a stable, seasonal night.
What to Wear
Start the day with layers, and switch to short sleeves if the sun wins out by midday. Tonight calls for rain boots and waterproof outerwear, and if you’re headed out in the evening, a light windbreaker will do the trick.
Weather Trivia – Thunder Bay’s “Booming” Reputation
Did you know? Thunder Bay’s unique location between Lake Superior and the boreal forest makes it a prime spot for localized thunderstorms, especially when humidity rises and frontal systems shift. It’s a favourite hangout for clouds with dramatic flair.
