Sioux Lookout – Weather – A crisp, calm morning in Sioux Lookout is giving way to a sunny and summer-like Wednesday, with rising temperatures and humidity marking the beginning of a hot stretch. While today will be beautiful, showers and potential storms return by Thursday and Friday, along with tropical-like humidity.

Today’s Weather Overview

Current Conditions

As observed at 6:00 AM CDT at Sioux Lookout Airport:

• Temperature: 10.6°C

• Condition: Mainly Sunny

• Wind: South-southeast at 5 km/h

• Pressure: 102.1 kPa (steady)

• Dew Point: 10.6°C

• Humidity: 100% (early morning saturation)

• Visibility: 24 km

Skies are sunny today, and winds will increase from the south to 20 km/h this afternoon. The daytime high will hit 27°C, with a humidex of 30, bringing a moderately muggy feel. The UV index of 8 is very high, so sun protection is essential during peak hours.

Tomorrow’s Forecast

Expected Conditions

Thursday, July 10

• Daytime: Skies will turn mainly cloudy, with a 30% chance of morning showers.

  • Wind: South 20 km/h gusting to 40 km/h

  • High: 28°C

  • Humidex: 36 – oppressive humidity

  • UV Index: 8 (Very High)

• Night: Cloudy periods with a 40% chance of showers.

  • Low: 19°C

Friday, July 11

• Daytime: Expect cloudy skies with a 60% chance of showers.

  • High: 23°C

• Night: Showers expected, with a low of 15°C.

Wardrobe Recommendations

• Today: Perfect weather for light, breathable clothing. A wide-brimmed hat and sunscreen are strongly recommended. Sunglasses and water bottles should be your outdoor essentials.

• Thursday: Plan for muggy, potentially wet weather. Wear quick-dry clothing and bring a light rain shell or umbrella, especially in the morning.

• Friday: Waterproof layers and rain-friendly footwear will come in handy.

Weather Trivia

Did you know?
The highest humidex ever recorded in Sioux Lookout was 43, logged in July 1988 during a widespread Ontario heat wave. While Thursday’s expected humidex of 36 isn’t a record-breaker, it’s a strong reminder of how summer heat can feel more intense with high humidity.