Shallow fog early, then sunshine and a high near 23°C — a warm and bright start to the week!

Sault Ste. Marie – Weather – Sault Ste. Marie starts the day under a light blanket of shallow fog, thanks to calm winds and saturated morning air. But this will quickly lift, giving way to sunshine and warmth, with highs well above seasonal norms.

The next several days offer a stable weather pattern — mostly clear skies, mild nights, and daytime highs around 20–23°C — making it a great stretch for outdoor activities or fall travel.

Current Conditions

• Observed at: Sault Ste. Marie Airport

• Time: 7:00 AM EDT

• Temperature: 5.5°C

• Dew Point: 5.5°C

• Humidity: 100%

• Wind: Northeast at 3 km/h

• Visibility: 19 km (reduced due to shallow fog)

• Pressure: 102.4 kPa (rising)

• Sky: Shallow fog — expected to clear quickly this morning.

Forecast Overview

Monday, September 29:

• Shallow fog patches dissipating this morning.

• Sunny skies through the afternoon.

• High: 23°C, with a humidex of 26°C — feels warm and mild.

• UV Index: 5 (moderate) — wear sun protection if outside midday.

Tonight:

• Clear skies.

• Winds becoming east at 20 km/h after midnight.

• Low: 10°C.

Tuesday, September 30:

• Mainly sunny, with some afternoon cloud possible.

• Winds east at 20 km/h, gusting to 40 km/h.

• High: 21°C

• UV Index: 5 (moderate)

• Night: Clear skies, with a low of 8°C.

Wednesday, October 1:

• A mix of sun and cloud.

• High: 20°C

• Night: Becoming cloudy, with a low of 11°C.

Thursday, October 2:

• Partly sunny skies expected.

• High of 21°C

• Night: Cloudy periods, with a low near 10°C.

Wardrobe Recommendations

Expect cool mornings and warm, sunny afternoons for most of the week:

• Morning Fog & Chill:

  • Wear a light jacket or sweater early in the day.

  • Visibility may be reduced slightly this morning — use caution while driving.

• Afternoons (Mon–Thu):

  • Switch to light long sleeves or breathable layers — temperatures will feel like summer at times.

• Evenings:

  • A sweater or hoodie will be comfortable as temperatures dip into the single digits.

Weather Trivia

Did you know?
Sault Ste. Marie is known for frequent early fall fog, particularly along the St. Marys River and Great Lakes shoreline. Today’s shallow fog is a product of clear skies, light winds, and high overnight humidity — a perfect setup for radiation fog, which tends to burn off quickly after sunrise, just as we’re seeing this morning.

Enjoy the warm sunshine after this morning’s fog clears — and stay with the NetNewsLedger Weather Desk for your daily updates!