Prince Rupert Weather in August
August in Prince Rupert typically sees daytime highs of 17°C (63°F) and nighttime lows of 12°C (54°F). August falls within the rainy season, so heavy rainfall is to be expected. It falls within the summer season.
Rainfall in Prince Rupert in August
As part of the rainy season, Prince Rupert sees around 18 days of rain in August, with an average of 186 mm (7.3 in). Rainy season showers tend to be fairly substantial. A good rain jacket or umbrella is worth having with you most days.
Temperature in Prince Rupert in August
Prince Rupert in August gets highs of 17°C (63°F) during the day and drops to 12°C (54°F) at night. The summer season is characteristic of August. Even when the weather is stable, mornings and evenings can still feel distinctly cool. With overnight lows of 12°C (54°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep. On average, it is the month with the highest temperature of the year.
Sunshine in Prince Rupert in August
The area experiences a moderate amount of sunshine, with approximately 142 hours of sunlight expected. Even though this month is part of the rainy season, you could still see the sun every now and then.
Wind Speed in Prince Rupert in August
Wind speeds average 2 m/s (4 knots) during August. At this speed, expect light breezes that you can feel on your face and cause leaves to rustle gently. Since this is an average, some days are calmer with barely any wind while others have more noticeable gentle breezes.
Average water temperature in August
At 14°C (57°F), the water is cool but manageable for those who don't mind a bit of a shock getting in. Most people adjust after a few minutes.August in Prince Rupert has its charm. However, if you're seeking pleasant, dry and sunny weather, our weather planner can help you explore other destinations in the world.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Canada, check out our Prince Rupert's climate page.
Prince Rupert Temperature in August
Min Temperature
12°C (54°F)
Max Temperature
17°C (63°F)
Water Temperature
14°C (57°F)
Chance of Rain
58%
Precipitation
186 mm (7.3 in)
Rainy days
18 days
Humidity
80%
Windspeed
2 m/s (4 knots)
Sunshine
142 hours
Percentage Sunshine
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Prince Rupert typically stay consistent throughout August, with daily highs averaging around 17°C (63°F). Nights are cool, with lows around 12°C (54°F).
Average temperatures in August
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in August
Historical weather for Prince Rupert in August
Browse day-by-day weather records for Prince Rupert spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Prince Rupert historical weather extremes in August
Our historical data for Prince Rupert spans 1976 to 2025, revealing these weather extremes.
- The hottest August day on record in Prince Rupert reached 28°C (82°F) (August 19, 2008).
- The coldest August day was on August 31, 2012, with a maximum of 12°C (54°F).
- The coldest night in August in Prince Rupert was on August 19, 1987, with a minimum of 5°C (41°F).
Best Places in Canada in August
Find out more about the weather in Canada and which places have the best travel conditions in this month. See all of Canada in August →
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What to Wear in Prince Rupert in August
Comfortable temperatures call for an easy wardrobe in August. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. It's going to pour! Pack a good poncho and prepare for very wet conditions. With water temperatures around 14°C (57°F), the water is quite cold for swimming. You can skip the swimwear unless you're particularly tough. Bring sunglasses since you'll have some sunny periods throughout the monthWhat To Do in Prince Rupert in August
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Canada, check out our Prince Rupert's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Prince Rupert climate overview or explore weather in Canada.
