Whitehorse Weather in September
Whitehorse in September sees low temperatures, with highs around 12°C (54°F) and overnight lows of 2°C (36°F). Around 58 mm (2.3 in) of rainfall is typical, so a light rain jacket is a sensible addition to your bag.
Rainfall in Whitehorse in September
Looking at the last 30 years, the data shows about 11 days with rain, averaging 58 mm (2.3 in) for the month. A fairly balanced picture this month, some wet days but nothing too extreme in terms of intensity.
Temperature in Whitehorse in September
In September, Whitehorse gets low temperatures, with highs of 12°C (54°F). Nights cool to around 2°C (36°F). Expect a cold feel throughout the day, not just in the mornings and evenings. Warm layers are essential. With overnight lows of 2°C (36°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets.
Sunshine in Whitehorse in September
You can expect a moderate amount of sunlight, with approximately 133 hours. This means a pleasant mix of sun and overcast.For Whitehorse itself, July generally stands out with the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Whitehorse Temperature in September
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Whitehorse Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Whitehorse - and find the best time to visit.
Daily Historical Temperatures
49-year average (1976-2025)
Based on our historical records, temperatures in Whitehorse typically drop from around 14°C (57°F) at the start of September to approximately 9°C (48°F) by the end. Nights are cold, with lows typically ranging from 0°C (32°F) to 5°C (41°F).
Average temperatures in September
Historical weather records for Whitehorse in September
Browse day-by-day weather records for Whitehorse spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Whitehorse historical weather extremes in September
According to our 19 years of weather records for Whitehorse, the following extremes were recorded between 2006 and 2025.
- Whitehorse recorded its highest September temperature of 26°C (79°F) on September 4, 2025.
- On September 24, 2010, Whitehorse saw its coldest September day with temperatures maxing out at 1°C (34°F).
- Whitehorse registered its coldest September night on September 29, 2009, with temperatures dropping to -7°C (19°F).
- The heaviest September precipitation occurred on September 5, 2014, when 19 mm (0.7 in) of precipitation fell.
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 →
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Whitehorse in September
Pack for changing conditions in Whitehorse 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. Rain gear is recommended, you can expect wet weather on multiple days. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.
What To Do in Whitehorse in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming5/10 -
Cycling6/10 -
Walking6/10 -
Camping4/10 -
Outdoor sports6/10
Whitehorse 3-Day Forecast
Temperature Rainfall Sunshine Humidity
See the full Whitehorse climate overview or explore weather in Canada.
Popular in September
Where to go in September - average daytime high across popular destinations.
Toronto
22°C (72°F) Niagara Falls23°C (73°F) Montréal
22°C (72°F) Ottawa22°C (72°F) Quebec City
20°C (68°F) Vancouver19°C (66°F) Calgary19°C (66°F) Whistler15°C (59°F) 
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