SeasonMapJasper (Jasper National Park) weather in September
Canada
September in Jasper: nice, a little rain, with clean air — one of the best months to visit.
#2 of 12 months in Jasper · #220 of 1383 destinations to visit in September · comfort 90/100 (tier S)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Jasper in September
Jasper's forum calls September genuinely changeable — regulars describe days warm enough for shorts followed by others that bring an early snow flurry, so layers and a warm fleece are standard advice. Nights routinely dip into the single digits even when the days stay mild, and it's still one of the park's busier months before the crowds thin out.
Add your own note from Jasper's card on the map.
Jasper climate normals — September
| Daytime high | 18°C / 65°F | 😎 nice |
|---|---|---|
| Nighttime low | 3°C / 37°F | |
| Feels like (high) | 16°C / 61°F | |
| Rainfall | 48 mm / 1.9 in | 🌦 some rain |
| Rainy days | 11 days | |
| Humidity | 77% | 💦 very humid |
| Dew point | 3°C / 38°F | |
| Sunshine | 9.4 h/day | |
| Daylight | 12.6 h | |
| Wind | 9 km/h / 6 mph | |
| Snowfall | 17.7 cm / 7 in | |
| Air quality (US AQI) | 35 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Jasper 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 Jasper'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).
Best weatherJasper's best weather comes in June, August and September — separate windows, not one continuous season.
September includes Elk rut.
Best weatherFair weatherToughest weather
What's on in Jasper in September
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Hazard
Wildfire smoke risk
1 Jul – 10 Sep · usuallySmoke seasonFire reached the townsite itself in 2024 and a third of the buildings went. In an ordinary bad summer the problem is smoke from elsewhere in Alberta or BC settling in the valley for days and taking the mountains with it. Source ↗
- Nature
Elk rut
1 Sep – 10 Oct · usuallyWildlife seasonRiskBulls bugle from the golf course and the verges around the townsite through September, and they are genuinely dangerous at close range. Parks staff spend the month moving people back thirty metres.
- Nature
Aspen and larch turn
10 Sep – 5 Oct · usuallyAutumn colourThe aspen along the Athabasca go gold in the second half of September and the larch above the treeline a week or two later. It is the short gap between the summer coaches and the first settled snow.
Nearby, and something's on
Within 300 km of Jasper — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Jasper?
Jasper in September — FAQ
- Is September a good time to visit Jasper?
- September in Jasper: nice, a little rain, with clean air — one of the best months to visit. It ranks #2 of 12 months for Jasper on SeasonMap's comfort score (90/100).
- What is the weather like in Jasper in September?
- In September, Jasper averages a daily high of 18.1°C and a low of 2.6°C, with about 47.6 mm of rain over roughly 10.6 rainy days.
- What is the air quality in Jasper in September?
- Jasper has a mean US Air Quality Index of about 35 in September.
- Does it snow in Jasper in September?
- Jasper sees roughly 17.7 cm of snowfall in September.
Other months in Jasper
Compare Jasper in September
Warmer or cooler than Jasper in September
Within 300 km: Lake Louise's Larch season around 14 Sep – 5 Oct, and Revelstoke's Meadows in the Sky Parkway around 16 May – 20 Oct.