Thunder Bay Weather Outlook A Good Start for Fall Conditions

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Marina Park as the Leaves Change to fall brilliance
Leaves Change to fall brilliance

Thunder Bay is set to experience a typical fall day with mild temperatures and a chance of showers later in the afternoon. Conditions will remain favorable for most outdoor activities, though some light rain and stronger winds may develop by evening. The week ahead will feature a mix of sunshine and rain, with temperatures staying above seasonal averages.


Today’s Weather Overview

Current Conditions

This morning, Thunder Bay is experiencing partly cloudy skies, with temperatures expected to rise to a high of 24°C. Winds are coming from the south at 20 km/h, creating a mild breeze, and the humidex will make it feel closer to 29°C. There’s a 30% chance of showers developing by late afternoon, with a slight risk of thunderstorms later in the day​.

  • Wind: South at 20 km/h
  • Humidity: Moderate
  • Pressure: 1012 mb
  • UV Index: Moderate (4)
  • Sunrise: 7:16 AM CDT
  • Sunset: 7:25 PM CDT

Tonight’s Forecast

As the evening progresses, expect cloudy periods with a 40% chance of showers, dropping temperatures to 12°C. Winds will remain moderate, with some areas possibly experiencing brief thunderstorms​.


Tomorrow’s Forecast: September 24, 2024

Expected Conditions

Tuesday will bring a mix of sun and cloud, with temperatures reaching a high of 23°C. There is a 40% chance of showers throughout the day, although rain is expected to be light and sporadic. Winds will continue to blow from the south but will ease slightly, providing comfortable conditions for most outdoor activities.

Extended Forecast:

  • Wednesday, September 25: Sunny, with temperatures climbing to 26°C.
  • Thursday, September 26: Expect a partly cloudy day, with a high of 23°C.
  • Friday, September 27: Increasing cloudiness and a 40% chance of showers, with a cooler high of 21°C (NetNewsLedger).

Lake Superior West Marine Conditions:

For those navigating Lake Superior’s western waters, a strong wind warning is currently in effect. Winds will reach 20 to 33 knots today, accompanied by waves of 1 to 1.5 meters. Winds will begin to diminish by Saturday, easing to 15 knots​. Boaters should be cautious, as there is also a risk of thunderstorms.

For the rest of the week, conditions are expected to improve, with winds calming and clearer skies ahead.

Wardrobe Recommendations

  • For Today: Light layers, such as a sweater or windbreaker, will be ideal for the daytime. A raincoat or umbrella is recommended for the afternoon and evening due to the possibility of showers. Sunglasses are also useful for the early part of the day.
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