Deep Freeze at Dawn with a Side of Sunshine in Sioux Lookout
Sioux Lookout, ON – Monday, March 31, 2025 – The end of March in Sioux Lookout is reading more like mid-February, as residents woke up to a crisp -14.3°C at 5:00 AM CDT. With a light north-northeast breeze at 5 km/h, the wind chill is making it feel more like -18°C. Humidity sits at 74%, and the air is dry enough to make your lips regret skipping chapstick. Visibility is strong at 24 km, and barometric pressure is on the rise at 101.8 kPa, suggesting a short-lived calm before the next round of spring snow taps in.
Today’s Forecast – Cloud Tag with Flurries and Chill
It’s a mixed bag in the skies today, with a blend of sun and cloud, and a 40% chance of flurries sneaking in this afternoon. Winds will swing to the northwest at 20 km/h, giving the morning a wind chill of -23 before it “warms” slightly to a more manageable -7 this afternoon. The temperature will climb to a daytime high of -1°C, so if you’re feeling brave, today might just be picnic weather… if your idea of a picnic includes a snowbank and thermos.
The UV index hits 4 today—moderate enough to warrant some SPF if you’re outside for long. Remember: the sun reflects off snow like it’s auditioning for a disco ball.
Tonight and the Week Ahead – Bitter Nights, Sunny Breaks, and Snowy Signals
Tonight brings partly cloudy skies with a lingering 30% chance of evening flurries before clearing out. Winds from the west at 20 km/h will taper off to light by late evening. Temperatures will tumble to -19°C overnight, and with the breeze, expect a wind chill near -24—definitely a night to park close to your door and plug in the block heater.
Tuesday brings a full day of sunshine, but don’t let that fool you. The morning wind chill will hit a biting -29°C, enough to warrant a risk of frostbite. Winds will pick up from the east at 20 km/h, and the temperature will eventually reach a high of +2°C. Clear skies persist into Tuesday night, with a low of -8°C.
Wednesday takes a cloudy turn, with a 60% chance of snow and a daytime high of +1°C. Snow becomes more certain by nightfall, with a low of -8°C. Thursday offers more cloud cover and a 30% chance of flurries, with a high near +2°C before dipping to -9°C overnight.
Wardrobe Suggestion
Today is a classic “layer it like an onion” day: base layers for warmth, a mid-layer for insulation, and a windproof outer shell to lock in the heat. Hats, gloves, and proper winter boots are still non-negotiables—especially with that morning chill. If you’re out early, even a brief exposure can make cheeks sting!
This Day in Sioux Lookout Weather History
On March 31, Sioux Lookout has seen its share of spring fakery. The warmest temperature recorded on this date was a balmy 11.5°C in 1981, while the chilliest dropped to -32.0°C in 1965. So today’s chilly conditions are actually a bit of a moderate middle ground for this northern community.
Did You Know?
Sioux Lookout earns its frosty reputation from its location in the heart of Northwestern Ontario’s boreal forest, where Arctic air masses settle in like they’ve paid rent. Its long, cold winters and late springs make it one of Ontario’s best spots for seeing the Northern Lights—if you can stand the cold long enough to look up!
