Cold Start with Clearing Skies
Thunder Bay sees clearing skies today before a bitterly cold night. Snow moves in Saturday afternoon, with milder temperatures Sunday before another deep freeze
Thunder Bay is waking up to a cloudy and crisp morning with temperatures sitting at -7.3°C. Humidity is at 84%, and with a light north wind at 2 km/h, the wind chill is only slightly colder at -8°C. The pressure is rising at 101.7 kPa, indicating a clearing trend.
The clouds will start breaking up this morning, giving way to a mix of sun and cloud before clearing completely. Winds will pick up from the northwest at 20 km/h, keeping the air feeling brisk. While the actual high will remain at -7°C, wind chills will make it feel much colder—near -19°C this morning and improving slightly to -14°C this afternoon. The UV index sits at a low 1, meaning sunburn won’t be a concern, but sunglasses might still be useful as the sun peeks through.
Tonight: Bitter Cold with a Risk of Frostbite
As the evening progresses, clear skies will dominate, but the temperature will take a serious dive. Winds will remain from the northwest at 20 km/h before easing off early in the evening. The overnight low will drop to a bitter -24°C, with wind chills making it feel like -18°C in the evening and a dangerous -29°C overnight. With frostbite a risk in just minutes, it’s essential to bundle up in thick layers if heading out.
Weekend Outlook: Snow Returns Saturday Afternoon
Saturday will start off with increasing cloudiness as a weather system approaches. By the afternoon, periods of snow will begin, bringing around 2 cm of accumulation. Winds will shift southeast at 20 km/h late in the afternoon, helping temperatures rise slightly to -5°C. However, the morning wind chill will be a frigid -27°C before improving to -14°C later in the day.
Saturday night will remain snowy, with temperatures dipping to -10°C. By Sunday, the snow continues with a high of -1°C, making it the mildest day of the forecast period. However, the warmth is short-lived—Sunday night brings a return to colder conditions, with a low of -16°C and a 60% chance of flurries.
Looking Ahead: Cold Start to the New Week
Monday will bring a mix of sun and cloud with a 30% chance of flurries and a high of -12°C. By night, expect cloudy periods, lingering flurries, and a sharp temperature drop to -24°C, reinforcing winter’s grip on the region.
What to Wear?
Today and tonight call for full winter gear—a thick parka, gloves, and insulated boots are a must, especially with wind chills making it feel like -29°C overnight. Saturday morning will be dangerously cold, requiring thermal layers and face protection. As snow moves in during the afternoon and continues into Sunday, waterproof outerwear will be useful for staying dry.
Weather Trivia: Thunder Bay’s Coldest January Day on Record
Did you know? Thunder Bay’s coldest recorded January temperature was a staggering -44.3°C on January 10, 1982. While this weekend will be frigid, it’s nowhere near that historic deep freeze!
