Sioux Lookout – WEATHER – Sioux Lookout is deep in a cold spring setback this Saturday morning, with light snow, gusty west winds, and a harsh wind chill making it feel closer to mid-winter than mid-April. Flurries remain possible through today and tonight before conditions begin to clear on Sunday.
It feels like Old Man Winter has stepped back in the driver’s seat yet again.
Today’s Weather Overview
Current Conditions
As of 8:00 AM CDT Saturday, April 18, 2026, Sioux Lookout was reporting light snow with a temperature of -9.8°C. The wind chill is a sharp -18, making exposed skin feel the cold quickly.
Winds are from the west at 22 km/h, gusting to 42 km/h. Visibility is reduced to 3 km, likely due to falling snow and blowing snow. Humidity is 70%, with a dew point of -14.2°C. Barometric pressure is 100.5 kPa and rising, suggesting the system is slowly moving out, though cold air remains firmly in place.
Today’s Forecast
Sioux Lookout will stay cloudy today with a 40 percent chance of flurries. Winds will strengthen from the west at 40 km/h, keeping the day cold and uncomfortable.
The high will only reach -6°C, with the wind chill staying near -19. The UV index is 3, or moderate.
Tonight’s Forecast
Tonight will be mainly cloudy with a 30 percent chance of flurries. Winds will continue from the west at 40 km/h, then shift to the northwest at 20 km/h, gusting to 40 km/h this evening.
The overnight low will fall to -9°C. Wind chill values will sit near -13 this evening and drop again to -18 overnight.
Sunday Outlook
Sunday brings improvement, but it will still be cold. Expect mainly cloudy skies, with clearing near noon. Winds will come from the northwest at 20 km/h.
The high will reach -2°C, with a morning wind chill near -17 and an afternoon wind chill near -8. Sunday night will be clear with a low of -9°C.
Looking Ahead
A warmer pattern begins to build next week. Monday brings a 40 percent chance of rain showers or flurries with a high of 9°C. By Tuesday, Sioux Lookout warms sharply under sunny skies with a high of 15°C. Wednesday looks even milder, with a mix of sun and cloud and a high near 19°C.
Weather Alerts and Hazards
No specific weather alert text was included with this update. However, Sioux Lookout faces several weather hazards today:
Light snow, reduced visibility, gusty winds, and very cold wind chills.
Drivers should be prepared for changing visibility and slippery sections on roads, especially in open areas where wind may blow snow across the roadway.
Wardrobe Recommendations
This is full winter gear weather. A warm insulated coat, gloves, toque, scarf, and boots with good traction are strongly recommended. With wind chills near -19, exposed skin can become uncomfortable quickly, so layering will be important for anyone spending time outdoors.
Weather Trivia
Sioux Lookout is known for sharp spring weather swings. Its inland Northwestern Ontario location means April can bring snow and wind chills one weekend, followed by sunshine and temperatures in the mid-to-upper teens just a few days later — exactly what this forecast is showing for the week ahead.
Weather Summary: Sioux Lookout weather update for April 18, 2026: light snow, gusty west winds, reduced visibility, and wind chills near -19 today before clearing Sunday and a major warm-up next week.
