Prince Rupert Weather in September
September in Prince Rupert brings moderate temperatures, with daytime highs of 15°C (59°F) and nights around 10°C (50°F). It's part of the rainy season, with 286 mm (11 in) of rainfall on average, so an umbrella or poncho is a good idea.
Rainfall in Prince Rupert in September
Prince Rupert is in the rainy season in September, with rain on around 20 days and an average of 286 mm (11 in). Rain during the rainy season is significant rather than just light drizzle. Expect proper showers on most rainy days.
Temperature in Prince Rupert in September
September in Prince Rupert brings typical temperatures with highs around 15°C (59°F) and lows of 10°C (50°F). September is a notable month of the summer season. The difference between afternoon and evening temperatures is usually noticeable. Nights fall to 10°C (50°F), which is cold enough to feel it indoors too. A good thick duvet makes all the difference for a comfortable night's sleep.
Sunshine in Prince Rupert in September
The area experiences a moderate amount of sunshine, with approximately 106 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 September
Average wind speeds reach 3 m/s (6 knots) in September, creating light breezes that feel pleasant throughout the day. Some days are calmer, while others bring slightly more active breezes.
Average water temperature in September
The water is 13°C (55°F) this month — cool enough to feel refreshing on a warm day, but cold enough that most people won't stay in for long without a wetsuit.September in Prince Rupert has its charm, but if you're looking for destinations with pleasant temperatures and sunny skies, our weather planner can help you explore other options 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 September
Min Temperature
10°C (50°F)
Max Temperature
15°C (59°F)
Water Temperature
13°C (55°F)
Chance of Rain
65%
Precipitation
286 mm (11 in)
Rainy days
20 days
Humidity
81%
Windspeed
3 m/s (6 knots)
Sunshine
106 hours
Percentage Sunshine
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Prince Rupert typically stay consistent throughout September, with daily highs averaging around 15°C (59°F). Nights are cool, with lows typically ranging from 8°C (46°F) to 11°C (52°F).
Average temperatures in September
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 September
Historical weather for Prince Rupert in September
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 September
The extremes listed below come from historical weather data collected in Prince Rupert from 1976 through 2025.
- Prince Rupert recorded its highest September temperature of 27°C (81°F) on September 8, 1989.
- On September 26, 1983, Prince Rupert saw its coldest September day with temperatures maxing out at 9°C (48°F).
Best Places in Canada in September
Find out more about the weather in Canada and which places have the best travel conditions in this month. See all of Canada in September →
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What to Wear in Prince Rupert in September
Pack for changing conditions in Prince Rupert in September. Bring a mix of short and long sleeves, a warm layer like a hoodie or light jacket, and comfortable pants. The key is being able to add or remove layers as the days goes by. Heavy rain is guaranteed, please bring a good poncho and waterproof everything! Expect water temperatures of around 13°C (55°F), which is definitely too cold for comfortable swimming. Your luggage space is better used for other items. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.What To Do in Prince Rupert in September
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.
