From T-Shirts to Toques – Spring in Sioux Lookout Pulls a Fast One
Sioux Lookout, ON – Monday, May 5, 2025 – If you’re looking for a warm spring day to soak up the sun, today is your golden ticket. The skies over Sioux Lookout are clear as daybreak with a current temperature of 8.6°C, climbing toward a gorgeous high of 24°C. Add in a modest humidex of 26, and it’s patio weather perfection!
Winds are starting off gently from the south-southeast at 11 km/h and are expected to pick up to 20 km/h later this morning, giving just enough breeze to keep things feeling fresh. The humidity is sitting at 60%, which gives the air a comfortable softness without any mugginess. Visibility is wide open at 24 km, and the barometric pressure is a steady 101.7 kPa and rising—just like the temperature.
Clear Tonight – Mild Now, But Change Is in the Air
Tonight stays clear and mild with an overnight low of 9°C, perfect for some stargazing or a peaceful evening walk. Winds will ease up as the sun goes down, shifting from a breezy 20 km/h to calm conditions. But this tranquil evening is your cue: enjoy it while it lasts, because Tuesday will turn the weather tables.
A Cloudy Dip and Cooler Air Arrives Tuesday
On Tuesday, May 6, skies will be a mix of sun and cloud, and there’s a 30% chance of showers through the morning into early afternoon—so maybe wait until later in the day for that outdoor lunch. The real shift, though, is the temperature drop: a high of just 15°C. Winds will change course, coming from the north at 20 km/h and gusting to 40. Time to bring the sweater back into rotation.
Tuesday night sees the skies clearing again, but the temperature takes a serious plunge to the freezing mark—0°C. On Wednesday, the sun returns in full, but with a high of only 14°C, it’ll feel a lot more like early April than early May. The chill lingers into the night with a low of +2°C.
May 5 History – Warm Now, But This Day Has Seen Snow Before
Sioux Lookout’s record for the warmest May 5 was set at a toasty 26.2°C in 1993, while the coldest on record dropped to a bone-chilling -6.5°C in 1967. Today’s warm high puts us comfortably toward the warmer end of the historic spectrum, but with tomorrow’s low dipping to zero, spring’s mood swings are clearly in full effect.
Wardrobe Wisdom: Break out the short sleeves today, but don’t let them fool you—by tomorrow night you’ll need your fleece again. And if you’re gardening, bring the plants inside Tuesday night to avoid frostbite!
Sioux Lookout Weather Trivia: Sioux Lookout averages 8 days above 20°C in May. With today’s warm spell, we’re off to a strong start—but those colder nights might keep you guessing.
