Sioux Lookout Weather Forecast – April 7, 2025
If you were hoping spring had finally arrived in Sioux Lookout, today’s temperatures are here to say, “Not so fast!” As of 6:00 AM CDT at the Sioux Lookout Airport, the temperature sits at a nippy -12.9°C under mainly clear skies. The dew point is holding at -17.3°C, with relative humidity at 70%. Winds from the north are steady at 10 km/h, pushing the wind chill down to a brisk -19°C. Visibility is wide open at 24 km, and the barometric pressure is at 102.6 kPa and rising—so at least things are trending calm and dry.
A Tease of Sun with a Side of Flurries
Today’s forecast offers a bit of everything. Expect a mix of sun and cloud, but don’t be surprised if a few rogue flurries float through early this morning—there’s a 40% chance of snowflakes to start the day. Winds will strengthen from the north at 20 km/h, helping to drive morning wind chill values to a biting -25°C. Temperatures will climb to a daytime high of -5°C, but wind chill will still hover around -10°C this afternoon. The UV index hits a moderate 4, so your sunglasses may get more use than your snow shovel.
Tonight, skies will transition from partly cloudy to completely clear. Winds will ease to 15 km/h or less, but don’t be fooled—the mercury drops to -21°C overnight, and wind chills will feel more like -23°C. A classic “crackling snow under your boots” kind of night.
Still Cold, But The Sun Sticks Around
Tuesday, April 8, brings more sunshine, and with it, a slow inching up of temperatures. Still, it starts off really cold, with wind chills reaching a face-freezing -28°C in the morning. The high for the day is only -1°C, and frostbite risk is very real for exposed skin during the early hours. Overnight Tuesday will be clear and cold again, bottoming out at -19°C.
By Wednesday, April 9, temperatures finally edge above freezing with a high of +3°C and sunny skies. Thursday brings even better news—sunny and 7°C, finally a forecast that feels like spring might be loosening winter’s grip. But every night this week still drops well below freezing, so no retiring your winter gear just yet.
What to Wear
It’s still deep-winter attire for Sioux Lookout: think thermal layers, heavy parka, insulated boots, and definitely hats and gloves. The risk of frostbite on Tuesday morning means any exposed skin should be covered—scarves and balaclavas are fashionable and functional right now. Sunglasses are a plus in the sun.
This Day in Weather History
On April 7 in Sioux Lookout’s weather history, the record high hit a mild 15.6°C—hard to believe when you’re staring down a -5°C high today. The coldest recorded temperature on this day was a frosty -26.1°C. So while it’s cold now, it’s not the chilliest the region’s seen for this date.
Northern Ontario Weather Fact
Sioux Lookout is known as the “Hub of the North,” and it’s also home to one of the coldest airport weather stations in Ontario. If it feels colder here than nearby towns—you’re not imagining it!
