From Clouds to Clear – A Radiant Turn for Sioux Lookout
SIOUX LOOKOUT – WEATHER REPORT – May 23, 2025 – After a string of cloudy and damp days, Sioux Lookout is stepping into a stretch of golden weather—just in time for the weekend. With skies clearing and sunshine dominating the forecast, it’s safe to say spring is finally showing off. But don’t pack away the warm layers just yet; brisk nights still bring a risk of frost. Consider this weekend nature’s gentle nudge to enjoy the outdoors—thermos in hand.
At Sioux Lookout Airport this morning, it’s 5.8°C under mostly cloudy skies, but change is in the air—literally. Winds are light from the northeast at 6 km/h, and visibility is an impressive 24 km. The humidity sits at 82%, giving the morning a cool, crisp feel. The barometric pressure is 102.4 kPa and rising, a promising sign of the sunny skies ahead.
Weekend Forecast – A Sunshine Sandwich with Chilly Fillings
Today:
Expect a beautiful turn as sunshine takes over the skies. Winds will shift to the north at 20 km/h, helping to keep the air feeling fresh and clean. The high reaches a comfortable 16°C, and the UV index is 6, meaning it’s a day for sunglasses and sunscreen—even if you’re just walking the dog.
Tonight:
A clear and cold night is ahead, with temperatures dipping to just 2°C. There is a risk of frost, so if you’ve planted any enthusiastic flowers or tomatoes, it’s time to tuck them in or cover them up.
Saturday, May 24:
Saturday delivers another sunny day, with temperatures slightly cooler at 15°C. The UV index remains high at 6, so don’t let the mild temps fool you—sunburn season has arrived.
Saturday Night:
Cloudy periods move in overnight, but the temperature holds steady with a low of 4°C—a bit warmer than Friday night, but still nippy.
Sunday, May 25:
Sunday is shaping up to be the weekend’s crown jewel, with a mix of sun and cloud and a spring-sational high of 20°C. It’s a perfect day for backyard barbecues, lake visits, or simply soaking up the long-awaited warmth.
Sunday Night:
The skies clear once again, with an overnight low of 6°C, offering a mild and peaceful finish to a stunning weekend.
What to Wear – Layers for Days and Nights
Daytime sunshine will tempt you into light shirts and breathable fabrics, but don’t be fooled—those evening temperatures dip fast. A jacket or sweater is essential for nighttime, and you’ll want a toque if you’re out stargazing or by the lake. During the day, sunglasses, sunscreen, and a brimmed hat are your go-to accessories.
Weather Time Travel – Sioux Lookout’s May Extremes
Sioux Lookout has seen it all in May. The historical high for May 23 reached 30.2°C in 1980, while the record low dipped to -4.6°C in 1966. This year’s blend of sunny days and near-frost nights falls neatly in the middle—a true northern Ontario spring classic.
Weather Trivia – Why Sioux Lookout Shines
Did you know Sioux Lookout sees more sunshine annually than most northern Ontario towns? Its inland position away from the Great Lakes often grants it clearer skies and more stable springtime weather. Translation? It’s a great spot to catch early summer vibes—just don’t forget your layers.
