Thunder Bay weather
At 6:15 PM local time it was clear and 8°C (47°F). Light rain for 1 of the next 24 hours (under 1 mm/h, 0.1 mm total) — cloudy, but fine to be out. Best months for weather: Jun–Sep. Thunder Bay sits 188 m (617 ft) above sea level, which keeps it cooler than the coast. Below: today's sky, the hour-by-hour rain chance and the 16-day forecast for Thunder Bay, Ontario, Canada.
Current conditions
- Clouds
- 0%
- Chance of rain
- 0%
- Rain
- 0.0 mm/h
Hourly Forecast
Light rain for 1 of the next 24 hours (under 1 mm/h, 0.1 mm total) — cloudy, but fine to be out
Daily Forecast
Best Time to Visit
Peak season Jun–SepOff season Oct–Apr
About Thunder Bay weather
Is it raining in Thunder Bay right now?
No. It’s clear and 8° right now. Light rain for 1 of the next 24 hours (under 1 mm/h, 0.1 mm total) — cloudy, but fine to be out.
What’s the weather like in Thunder Bay this week?
Over the next 7 days, expect highs of 7–14° and lows of -1–9°. Rain is likely on 3 of 7 days (Monday, Tuesday, Wednesday). The driest day looks like Saturday.
Has it been raining in Thunder Bay lately?
In the past 7 days, Thunder Bay had 2 rainy days and 11.3 mm of rain in total.
What should I pack for Thunder Bay?
For the coming week, bring an umbrella or rain jacket and a warm winter coat.
Thunder Bay weather by month
When is the best time to visit Thunder Bay?
Based on weather alone, the best time to visit Thunder Bay is Jun–Sep, according to NASA's 2001–2025 climate averages. Oct–Apr tends to be the least pleasant. Average highs run from -9°C (15°F) in January to 24°C (74°F) in July.
What is the rainiest month in Thunder Bay?
June is the wettest month, with about 86 mm (3.4 in) of rain on average. February is the driest, with about 20 mm (0.8 in).
What is the hottest month in Thunder Bay?
July is the warmest, with average highs of 24°C (74°F) and lows of 12°C (54°F). January is the coolest, with highs of -9°C (15°F) and lows of -18°C (-1°F).
Does Thunder Bay have a rainy season?
Not a strong one. No month averages more than 150 mm of rain; the wettest is June at about 86 mm (3.4 in).
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis), forecast and current conditions from Open-Meteo. Page updated . How we rate months