SeasonMapWhitehorse weather in September
Canada
September in Whitehorse: cool, a little rain, with clean air — a great time to visit.
#5 of 12 months in Whitehorse · #867 of 1383 destinations to visit in September · comfort 75/100 (tier B)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Whitehorse in September
Other months in Whitehorse
July gives Whitehorse close to round-the-clock light — over eighteen hours on the record — and the forum rates July to September as the window for hiking. Near the solstice you can walk safely on a clear night, though cloud makes it too dark. Days average 21°C. Two honest caveats. The first is bugs: mosquitoes are at their worst in June and July, bad enough that regulars pack mosquito-proof clothing, and once they ease it turns into black fly season. The second is the aurora — the Yukon season runs from about 20 August to early April, so a July trip is a summer trip. The forum's own suggestion for wanting both is summer in Whitehorse, winter in Yellowknife.
Add your own note from Whitehorse's card on the map.
Whitehorse climate normals — September
| Daytime high | 13°C / 55°F | 🙂 cool |
|---|---|---|
| Nighttime low | 5°C / 40°F | |
| Rainfall | 41 mm / 1.6 in | 🌦 some rain |
| Rainy days | 11 days | |
| Humidity | 78% | 💦 very humid |
| Dew point | 5°C / 40°F | |
| Sunshine | 8 h/day | |
| Daylight | 12.9 h | |
| Wind | 13 km/h / 8 mph | |
| Snowfall | 3.4 cm / 1.3 in | |
| Air quality (US AQI) | 27 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Whitehorse in September
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
BusySummer break in Canada(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Whitehorse's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Fair weatherWhitehorse's weather peaks June–August, best around July.
Best weatherFair weatherToughest weather
What's on in Whitehorse in September
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Nature
Aurora season
20 Aug – 10 Apr · usuallyDark enough to see the lights from late August until the light comes back in spring, with a break either side of the solstice when it never really gets dark. Get out of the city glow and up the Klondike Highway.
Nearby, and something's on
Within 300 km of Whitehorse — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Whitehorse?
Whitehorse in September — FAQ
- Is September a good time to visit Whitehorse?
- September in Whitehorse: cool, a little rain, with clean air — a great time to visit. It ranks #5 of 12 months for Whitehorse on SeasonMap's comfort score (75/100).
- What is the weather like in Whitehorse in September?
- In September, Whitehorse averages a daily high of 12.9°C and a low of 4.7°C, with about 40.5 mm of rain over roughly 11.2 rainy days.
- What is the air quality in Whitehorse in September?
- Whitehorse has a mean US Air Quality Index of about 27 in September.
- Does it snow in Whitehorse in September?
- Whitehorse sees roughly 3.4 cm of snowfall in September.
Other months in Whitehorse
Compare Whitehorse in September
Warmer or cooler than Whitehorse in September
Similar destinations in North America — September
Within 300 km: Juneau's Humpback whale season around 1 May – 20 Sep.