Thunder Bay
July
Weather in Thunder Bay for July 2025
Your guide to Thunder Bay weather in July - trends and predictions
In general, the average temperature in Thunder Bay at the beginning of July is 19.4 °C. As the month progressed, temperatures tended to significantly warm up, reaching an average of 23.7 °C by the end of July.
Expect significant rainfall in Thunder Bay during July, with an average of 19 rainy days.
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12
Dry days
19
Rainy days
0
Snow days
20°/12°
Temperatures
13 km/h
Avg max wind
77 %
Avg humidity
Thunder Bay in July average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  20° | 2  17° | 3 21° | 4 21° | 5 18° | 6 20° | |
| 7 19° | 8  19° | 9  20° | 10 20° | 11  20° | 12 22° | 13 22° |
| 14 24° | 15 19° | 16 20° | 17  18° | 18 21° | 19 20° | 20 21° |
| 21 21° | 22 23° | 23 18° | 24 20° | 25 24° | 26 23° | 27 26° |
| 28 24° | 29 21° | 30 24° | 31 24° |
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Temperatures trend during July in Thunder Bay
See the weather trend as well as the moving average line
July weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Jul. | Patchy rain possible | 20° /11° | 0.5 mm | 5 | |
| 2 Jul. | Overcast | 17° /12° | 6.1 mm | 4 | |
| 3 Jul. | Overcast | 21° /12° | 0.8 mm | 5 | |
| 4 Jul. | Overcast | 21° /12° | 0.8 mm | 5 | |
| 5 Jul. | Patchy rain possible | 18° /12° | 4 mm | 5 | |
| 6 Jul. | Overcast | 20° /11° | 0 mm | 5 | |
| 7 Jul. | Patchy rain possible | 19° /12° | 0.8 mm | 5 | |
| 8 Jul. | Partly cloudy | 19° /11° | 3.7 mm | 5 | |
| 9 Jul. | Moderate rain at times | 20° /11° | 3.3 mm | 5 | |
| 10 Jul. | Moderate or heavy rain shower | 20° /13° | 4.1 mm | 5 | |
| 11 Jul. | Cloudy | 20° /12° | 0.1 mm | 5 | |
| 12 Jul. | Overcast | 22° /11° | 0 mm | 5 | |
| 13 Jul. | Overcast | 22° /12° | 0 mm | 5 | |
| 14 Jul. | Cloudy | 24° /13° | 0.4 mm | 6 | |
| 15 Jul. | Patchy rain possible | 19° /13° | 0.4 mm | 5 | |
| 16 Jul. | Patchy rain possible | 20° /11° | 0.7 mm | 5 | |
| 17 Jul. | Heavy rain at times | 18° /10° | 2.4 mm | 4 | |
| 18 Jul. | Patchy rain possible | 21° /11° | 0.8 mm | 5 | |
| 19 Jul. | Moderate or heavy rain shower | 20° /11° | 1.5 mm | 6 | |
| 20 Jul. | Moderate rain at times | 21° /11° | 5.4 mm | 5 | |
| 21 Jul. | Cloudy | 21° /13° | 0 mm | 6 | |
| 22 Jul. | Overcast | 23° /13° | 7.7 mm | 5 | |
| 23 Jul. | Patchy rain possible | 18° /12° | 0.2 mm | 5 | |
| 24 Jul. | Partly cloudy | 20° /10° | 0 mm | 6 | |
| 25 Jul. | Overcast | 24° /12° | 0 mm | 6 | |
| 26 Jul. | Moderate or heavy rain shower | 23° /15° | 11.1 mm | 6 | |
| 27 Jul. | Patchy rain possible | 26° /15° | 0.6 mm | 6 | |
| 28 Jul. | Overcast | 24° /16° | 3 mm | 6 | |
| 29 Jul. | Overcast | 21° /15° | 5.8 mm | 5 | |
| 30 Jul. | Moderate rain at times | 24° /14° | 1.1 mm | 5 | |
| 31 Jul. | Moderate rain at times | 24° /15° | 1.9 mm | 6 | |
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Important Notice
Our weather forecast for Thunder Bay in July is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Thunder Bay forecast closer to your planned date for the most up-to-date weather information.
Thunder Bay in July - FAQ
What are the expected maximum and minimum temperatures in Thunder Bay during July?
Enjoy moderate daytime temperatures of up to 20° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Thunder Bay during July?
Moderate rainfall is anticipated in Thunder Bay during July, with a total of 67.1 mm spread over approximately 19 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Thunder Bay during July?
The average wind speed in Thunder Bay during July is 13 km/h, suggesting breezy to windy conditions, depending on your activities.
July rainfall patterns in Thunder Bay
Explore the daily rainfall trends and prepare for Thunder Bays July weather 💧
UV exposure in Thunder Bay during July
Stay informed about UV levels for safe outdoor activities throughout the month of July ☀️
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