A Chilly Start, but Better Days Are Brewing
Sioux Lookout, ON – Sunday, April 6, 2025 – It’s another crisp morning in Sioux Lookout, with temperatures at -10.7°C under cloudy skies. The wind is barely there from the north at just 2 km/h, but even that slight breeze pushes the wind chill down to -12. With humidity at 82% and a dew point of -13.2°C, it’s cold, it’s dry, and frankly, it feels like winter is clinging to the last of its lease. Visibility is a generous 24 km, and pressure sits at 101.8 kPa but is falling—meaning a few weather changes are likely to blow in soon.
Afternoon Flurries and Gusty Winds Incoming
Today’s forecast calls for mainly cloudy conditions with a 40% chance of light flurries this afternoon. The wind will pick up late this morning, shifting to the north at 20 km/h and gusting to 40. While the high temperature will reach -3°C, wind chills will make it feel closer to -18°C this morning and around -9°C this afternoon. The UV index will rise to 4—moderate enough to warrant some SPF if you plan to be outside when the sun sneaks through the clouds.
Tonight, it remains mainly cloudy with another 40% chance of flurries during the evening. The wind continues from the north at 20 km/h with gusts up to 40. The temperature dives to a low of -16°C, with an overnight wind chill of -23—definitely not ideal for patio season just yet.
Monday: Cold but Clear Skies Ahead
Good news for the sun seekers: Monday will be bright and sunny, though the cold isn’t quite done. The high will be -5°C, with morning wind chills plummeting to -24. Winds will stay light, up to 15 km/h, and by the afternoon, it’ll feel closer to -9°C. The UV index remains at a moderate 4, so the sun is out there working its spring magic.
Monday night will be clear and bitterly cold, with the temperature sinking to -17°C.
Spring Awakens Midweek: A Warming Trend
Tuesday’s sun sticks around, and the temperature finally tips above freezing with a high of +1°C. The clear skies continue Tuesday night, and the low will be a milder (relatively speaking) -10°C.
But here’s the kicker—spring really shows up midweek. Wednesday is shaping up to be absolutely lovely with a high of 10°C and sunny skies. Thursday and Friday continue the trend with highs of 12°C and 13°C respectively. The nights will still flirt with freezing, but we’re looking at a full spring swing by week’s end.
Historic Weather for April 6 in Sioux Lookout
On this date, Sioux Lookout has seen some real temperature drama. The warmest April 6 reached a pleasant 17.8°C back in 1981. The coldest? A teeth-chattering -27.2°C in 1972. So while it’s a chilly start today, it’s far from the coldest the region has endured.
What to Wear Today in Sioux Lookout
Bundle up like it’s still February. Insulated jackets, warm gloves, and a toque are non-negotiable. If you’re heading out during the windier afternoon, a scarf wouldn’t hurt either. Sunglasses are still handy thanks to the UV index and bright skies peeking through the clouds.
Sioux Lookout Weather Trivia
Here’s a fun weather tidbit: Sioux Lookout is one of Ontario’s top contenders for coldest temperature swings in a single week. It’s not uncommon for the mercury to swing over 20 degrees in just a few days this time of year—just like we’ll see by Friday!
