Cloudy Start Gives Way to Clear Blue Horizons and Rising Temperatures
Prairie-Boreal Blend Delivers a Classic Northwestern Ontario Warm-Up
SIOUX LOOKOUT – WEATHER – Monday, May 26, 2025 – It’s a cloudy and mild start to the day in Sioux Lookout, but don’t let the grey fool you. Sunshine is just around the corner, and with it comes a steady warm-up that will make the next few days feel like a sneak peek of summer.
At 5:00 AM CDT, the temperature at Sioux Lookout Airport was a pleasant 10.4°C, with a dew point of 5.1°C and humidity at 70%—comfortable and refreshing. Winds are light from the southeast at 6 km/h, and visibility is clear at 24 km. Barometric pressure is at 102.7 kPa but falling, signaling a shift in the weather pattern, though all signs point to stable and sunny conditions ahead.
Today’s forecast starts off cloudy, but skies will transition to a mix of sun and cloud by late morning, with the temperature climbing to a warm high of 22°C. The UV index is 7, rated as high, so don’t forget to pack the sunscreen and sunglasses if you’re heading outdoors.
Tonight, expect clearing skies, with an overnight low of 8°C—a perfect night for a backyard fire or some stargazing.
Sunny Streak: Perfect Prairie-Boreal Weather Ahead
Tuesday brings full sunshine and a high of 23°C, making it ideal for everything from yard work to lakeside lounging. Clear skies continue Tuesday night, with a mild low of 9°C.
Wednesday and Thursday deliver peak spring vibes, with sunny skies and highs of 24°C and 26°C, respectively. Nights will remain pleasantly warm, with lows of 10°C Wednesday night and 11°C Thursday night.
With no signs of rain or smoke, it’s a rare gem of a forecast in Northwestern Ontario—prime time to enjoy the outdoors while the weather is at its best.
Wardrobe Suggestion
Start with a light jacket or hoodie in the morning, but prepare for short sleeves and sun hats by mid-day. This is classic layer-shedding weather. And with UV levels high, a little SPF will go a long way!
Weather Trivia: Where the Prairie Ends and the Boreal Begins
Did you know? Sioux Lookout sits right near the ecological transition zone between the boreal forest and the prairies—this means it gets the best (and sometimes the worst!) of both worlds when it comes to weather. This week, it’s all the best.
