Thunder Bay weather live forecast

Tomorrow's maximum temperature in Thunder Bay is expected to be 16°C.

  • Saturday
    18th May
    Isolated thunderstorms (5-10 mm of rainfall expected)
  • Sunday
    19th May
    Sunshine and showers (0-2 mm of rainfall expected)
  • Monday
    20th May
    Isolated thunderstorms (10-20 mm of rainfall expected)
  • Tuesday
    21st May
    Mostly cloudy with rain (5-10 mm of rainfall expected)
  • Wednesday
    22nd May
    Isolated thunderstorms (20-30 mm of rainfall expected)

5-day weather forecast updated at 04:00 on Saturday 18th May 2024 GMT

More about Thunder Bay

Thunder Bay by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Ontario

Air Canada: Low fares on flights to Canada & USA

  • Check out latest flight deals & promotional offers
  • Find lowest fares on flights to Canada, USA & beyond
  • Select a departure point to see the available routes & prices
Go to Air Canada deal >>

View all Air Canada offers

Air CanadaLow fare finder

The 5-day weather forecast for Ontario (Thunder Bay) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

Thunder Bay weather forecast by day

Below are the detailed weather forecasts for Thunder Bay for the next 5 days.

Thunder Bay weather for Saturday 18th May 2024

Expect isolated thunderstorms in Thunder Bay, Ontario with a maximum temperature of 16°C, maximum UV of 6 (High) and 4 hours of bright sunshine. There are 5-10 mm of rainfall expected with 65% chance of some rain and a gentle breeze of 14 kph from the east.

  • 16°C maximum temperature16
    °C maximum temperature
  • 6°C minimum temperature6
    °C minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 4 hours of bright sunshine4
    hours of sunshine
  • UV (maximum) index 6 (High)6
    UV index (High)
  • 65% chance of some rain65
    % chance of some rain
  • 5-10 mm of rainfall expected<10
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Gentle breeze of 14 kph from the East14
    kph wind from E

Back to top

Thunder Bay weather for Sunday 19th May 2024

Expect sunshine and showers in Thunder Bay, Ontario with a maximum temperature of 21°C, maximum UV of 5 (Moderate) and 9 hours of bright sunshine. There are 0-2 mm of rainfall expected and a gentle breeze of 18 kph from the south-west.

  • 21°C maximum temperature21
    °C maximum temperature
  • 9°C minimum temperature9
    °C minimum temperature
  • Sunshine and showers
    sunshine and showers
  • 9 hours of bright sunshine9
    hours of sunshine
  • UV (maximum) index 5 (Moderate)5
    UV index (Moderate)
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • 21°C wind chill21
    °C wind chill
  • Gentle breeze of 18 kph from the South-West18
    kph wind from SW

Back to top

Thunder Bay weather for Monday 20th May 2024

Expect isolated thunderstorms in Thunder Bay, Ontario with a maximum temperature of 15°C, maximum UV of 4 (Moderate) and 3 hours of bright sunshine. There are 10-20 mm of rainfall expected with 40% chance of some rain and a light breeze of 10 kph from the east.

  • 15°C maximum temperature15
    °C maximum temperature
  • 9°C minimum temperature9
    °C minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 3 hours of bright sunshine3
    hours of sunshine
  • UV (maximum) index 4 (Moderate)4
    UV index (Moderate)
  • 40% chance of some rain40
    % chance of some rain
  • 10-20 mm of rainfall expected<20
    mm of rainfall expected
  • 15°C wind chill15
    °C wind chill
  • Light breeze of 10 kph from the East10
    kph wind from E

Back to top

Thunder Bay weather for Tuesday 21st May 2024

Expect mostly cloudy with rain in Thunder Bay, Ontario with a maximum temperature of 16°C, maximum UV of 6 (High) and 3 hours of bright sunshine. There are 5-10 mm of rainfall expected with 65% chance of some rain and a gentle breeze of 18 kph from the north-east.

  • 16°C maximum temperature16
    °C maximum temperature
  • 9°C minimum temperature9
    °C minimum temperature
  • Mostly cloudy with rain
    mostly cloudy with rain
  • 3 hours of bright sunshine3
    hours of sunshine
  • UV (maximum) index 6 (High)6
    UV index (High)
  • 65% chance of some rain65
    % chance of some rain
  • 5-10 mm of rainfall expected<10
    mm of rainfall expected
  • No heat & humidity0
    no heat & humidity
  • Gentle breeze of 18 kph from the North-East18
    kph wind from NE

Back to top

Thunder Bay weather for Wednesday 22nd May 2024

Expect isolated thunderstorms in Thunder Bay, Ontario with a maximum temperature of 12°C, maximum UV of 3 (Moderate) and 3 hours of bright sunshine. There are 20-30 mm of rainfall expected with 57% chance of some rain and a moderate breeze of 24 kph from the north-west.

  • 12°C maximum temperature12
    °C maximum temperature
  • 7°C minimum temperature7
    °C minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 3 hours of bright sunshine3
    hours of sunshine
  • UV (maximum) index 3 (Moderate)3
    UV index (Moderate)
  • 57% chance of some rain57
    % chance of some rain
  • 20-30 mm of rainfall expected<30
    mm of rainfall expected
  • 12°C wind chill12
    °C wind chill
  • Moderate breeze of 24 kph from the North-West24
    kph wind from NW

Back to top

Air Canada: Low fares on flights to Canada & USA

  • Check out latest flight deals & promotional offers
  • Find lowest fares on flights to Canada, USA & beyond
  • Select a departure point to see the available routes & prices
Go to Air Canada deal >>

View all Air Canada offers

Air CanadaLow fare finder

Metric (°C / mm)  |  Imperial (°F / inches)

Back to top

More about Canada

Related posts

Popular travel offers

Explore holidays in the sun for less

More holidays

Airport parking

More parking

Airport lounges

More lounges

Top ^