July 22, 2025: Sioux Lookout Detailed Weather Forecast

SIOUX LOOKOUT – Weather – The weather in Sioux Lookout is turning increasingly unsettled today, as a warm and humid air mass settles over the region. With the potential for showers and thunderstorms this afternoon, residents should prepare for a muggy day with periods of gusty wind and limited sun. Keep umbrellas and storm plans close — the atmosphere is primed for active weather.

Today’s Weather Overview

Current Conditions

As of 6:00 AM CDT at Sioux Lookout Airport, skies are cloudy, and the temperature sits at 18.8°C. The dew point is 16.5°C, with humidity at 87%, creating a noticeably humid feel. Winds are currently from the south-southwest at 10 km/h, expected to strengthen to south 20 km/h, with gusts up to 40 km/h later this morning. Visibility remains excellent at 19 km, and pressure is rising at 101.3 kPa, indicating a temporary period of stability before storms move in.

There’s a 30% chance of early morning showers, increasing to 70% this afternoon, accompanied by a risk of thunderstorms. Temperatures will climb to 26°C, with a humidex of 31, making it feel even warmer. The UV index is 6, considered high, so take precautions during any outdoor activity.

Tomorrow’s Forecast

Expected Conditions

Wednesday, July 23

• Day: Continued cloudy skies, with local smoke possibly moving into the area. Temperatures will be a bit cooler but still warm, with a high of 25°C and humidex of 29.

• Night: Cloudy periods with a 30% chance of showers. Overnight low of 14°C.

Thursday, July 24

• Day: Expect a mix of sun and cloud, with a 30% chance of passing showers. High remains steady at 25°C.

• Night: Partly cloudy, with a low of 14°C.

Friday, July 25

• Day: A mix of sun and cloud continues, again with a 30% chance of showers. High near 27°C.

• Night: Partly cloudy with a 30% chance of overnight showers. Low of 16°C.

Wardrobe Recommendations

• Today: Dress in lightweight, breathable clothing suitable for humid conditions. Bring a rain jacket or umbrella for the afternoon showers and potential thunderstorms. A hat and sunglasses will still be useful due to high UV levels.

• Wednesday to Friday: Air quality may become a concern with local smoke forecasted — limit outdoor exertion if smoke is present. Continue with comfortable summer wear, and consider a light jacket for the evenings, as overnight lows drop into the mid-teens.

Weather Trivia

Did You Know?
The Sioux Lookout area often experiences enhanced convective activity in summer due to its inland geography and relatively high elevation. This means hot, humid days like today — with temperature and dew point in the high teens — can easily trigger thunderstorms, especially when accompanied by gusty winds and frontal movement.