Chilly Morning Gives Way to Sun — Drone Light Show Set for a Clear Night at Marina Park

THUNDER BAY – WEATHER – It’s a crisp start in Thunder Bay this morning as shallow fog and calm winds settle over the region. Temperatures are hovering just above 5°C, but skies are expected to clear as the sun rises, setting the stage for a pleasant day and a fantastic evening — just in time for the Drone Light Show at Marina Park.

It is a welcome change after Wednesday’s major rainfall – the storm dropped vertical rain and seems to just keep coming.

Looking ahead, the Labour Day weekend brings sunshine, rising temperatures, and near-perfect late summer weather.

Today’s Weather Overview

Current Conditions

Observed at: Thunder Bay Airport
Time: 8:00 AM EDT, Thursday, August 28, 2025

• Temperature: 5.2°C

• Condition: Shallow Fog

• Wind: Calm

• Humidity: 100%

• Dew Point: 5.2°C

• Pressure: 102.4 kPa (Rising)

• Visibility: 32 km

Morning fog patches will lift quickly, revealing mainly sunny skies across the city. A light breeze and low humidity will make for a comfortable afternoon.

Today’s High: 19°C
UV Index: 6 or High — be sure to wear sunscreen if you’ll be out for long.

Tonight: Skies remain clear into the evening, perfect for viewing the drone light show. Fog patches will develop overnight, so early Friday morning may start misty again. Low: 7°C

Extended Weather Forecast

Expected Conditions

Friday, August 29:
A mix of sun and cloud with morning fog patches dissipating. Slightly cooler than average with a high of 16°C, but still pleasant under dry skies.
UV Index: 6 or High

Friday Night: Clear skies continue with a calm and cool low of 8°C.

Saturday, August 30:
A shift in the weather pattern brings a significant warm-up. Expect sunshine and a high of 26°C — ideal weather for outdoor adventures or hitting the trails.

Saturday Night: Clear and mild, with a low of 12°C.

Sunday, August 31:
Even warmer! Sunny with a high of 28°C — the warmest day of the holiday weekend.

Sunday Night: Clear again, dipping to 11°C.

Labour Day Monday, September 1:
A mix of sun and cloud with another warm high of 26°C.

Monday Night: Cloudy periods develop with a comfortable low of 13°C.

Wardrobe Recommendations

• Today: Start with a warm jacket or hoodie for the morning chill. Layers are recommended — by afternoon, a light sweater or long-sleeve shirt will be enough.

• Tonight (Drone Show): Bring a blanket or coat for comfort, as it will cool quickly after sunset.

• Friday: Dress in light layers — still cool for late August, especially in the morning.

• Saturday to Monday: T-shirts, shorts, and sunglasses. A hat and sunscreen are a must during peak afternoon hours.

• Evenings: Keep a light jacket or sweater handy for cooler nighttime temperatures.

Weather Trivia

Did You Know?
Thunder Bay holds the record for the coldest Labour Day morning in Ontario, with temperatures dipping to -0.6°C back in 1976. While this morning doesn’t break that record, the crisp air is a reminder of how quickly fall can arrive in Northwestern Ontario — even when summer weather is still hanging on during the day.