Thunder Bay weather in July
Temperature, rain and sunshine in July: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in July
Excellent
Best time to visit: June – September
What is the weather like in Thunder Bay in July?
In July, Thunder Bay is warm: daytime highs average 22 °C, and nights cool down to about 16 °C. The sun shines for around 9 hours a day. Rain is frequent, with about 10 rainy days and 70 mm in total. All in all, July is an excellent month for a holiday in Thunder Bay.
July compared
How the weather changes from June to August. Tap a month to open it.
More details for July
- Daylight
- 15 h 45 min06:10 – 21:55
- UV index
- 8 · very highclear sky, noon (estimate)All months
- Muggy days
- 3 daysdew point 18 °C or moreAll months
- Wind
- 19 km/haverage daily peakAll months
- Cloud cover
- 53 %on averageAll months
- Hot days
- 0 days30 °C or more
- Snow days
- 0 days1 cm or more of fresh snowAll months
- Time zone
- UTC−4America/Toronto
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %98 %
- Few rainy daysweight 30 %56 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in July
- Sunscreen
- Sunglasses & sun hat
- A jumper for the evenings
- Rain jacket or umbrella
Thunder Bay in July: quick answers
Is Thunder Bay hot in July?
Warm rather than hot: in July, daytime highs in Thunder Bay average 22 °C and nights cool to about 16 °C.
Does it rain much in Thunder Bay in July?
Rain is frequent, with about 10 rainy days and 70 mm in total.
Thunder Bay month by month
The whole year in Thunder BayAll destinations: CanadaWhere to go in July
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences