SeasonMapLake Louise (Lake Louise ski) weather in September
Canada
September in Lake Louise: cool, a little rain, with clean air — not the best time to visit.
#9 of 12 months in Lake Louise · #1315 of 1383 destinations to visit in September · comfort 32/100 (tier F)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Lake Louise in September
Notes from nearby Banff (51 km away)
Lake Louise doesn't have its own notes for September yet — these are about Banff, close enough to share the season.
Banff's forum calls September beautiful but genuinely unpredictable — daily highs sliding from around 19°C early in the month to 13°C by the end, with the mountains capable of snow, rain, and warm sun all in the same day. Regulars flag peak larch season as a September highlight, and note that higher elevations run noticeably colder and wetter than the townsite, sometimes snowing on the peaks while it only rains down in the valley.
Other months in Lake Louise
Lake Louise's forum calls late March some of the best skiing of the year — deep snow still on the ground, milder temperatures than midwinter, and noticeably longer days. Regulars note snow reliably holds well into April, with winter activities like sleigh rides and snowshoeing still running through mid-month.
Add your own note from Lake Louise's card on the map.
Lake Louise climate normals — September
| Daytime high | 15°C / 59°F | 🙂 cool |
|---|---|---|
| Nighttime low | 3°C / 37°F | |
| Feels like (high) | 13°C / 55°F | |
| Rainfall | 57 mm / 2.3 in | 🌦 some rain |
| Rainy days | 12 days | |
| Humidity | 72% | 💧 humid |
| Dew point | 6°C / 42°F | |
| Sunshine | 9.9 h/day | |
| Daylight | 12.6 h | |
| Wind | 11 km/h / 7 mph | |
| Snowfall | 16 cm / 6.3 in | |
| Air quality (US AQI) | 37 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Lake Louise 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.
Peak crowdsLarch season, Summer break in Canada(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Lake Louise'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 weatherLake Louise's best weather comes in February, March and November — separate windows, not one continuous season.
Best weatherFair weatherToughest weather
What's on in Lake Louise in September
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Opening
Moraine Lake road season
1 Jun – 12 Oct · usuallyTrail seasonBook earlyClosuresThe road opens around 1 June and shuts in mid-October, and private cars are banned the whole time it is open. It is the Parks Canada shuttle from the ski-hill park-and-ride, a commercial bus, or a bike — book the moment the window releases. Source ↗
- Season
High trails clear
1 Jul – 30 Sep · usuallyTrail seasonPlain of Six Glaciers, Sentinel Pass and the Devil's Thumb only lose their snow in late June or July, and the two teahouses open with them. Before that the routes need traction and the upper lakes are still ice.
- Hazard
Wildfire smoke risk
15 Jul – 10 Sep · usuallySmoke seasonSmoke from fires in BC or northern Alberta can fill the valley for days at a stretch in high summer, and the famous view up the lake to the glacier is the first thing to disappear. Source ↗
- Nature
Larch season
14 Sep – 5 Oct · usuallyAutumn colourCrowdedLarch Valley above Moraine goes gold for about a fortnight in late September, and it is the busiest trail in the Rockies for exactly those days. Parks Canada often requires groups of four for bears on it.
Nearby, and something's on
Within 300 km of Lake Louise — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Lake Louise?
Lake Louise in September — FAQ
- Is September a good time to visit Lake Louise?
- September in Lake Louise: cool, a little rain, with clean air — not the best time to visit. It ranks #9 of 12 months for Lake Louise on SeasonMap's comfort score (32/100).
- What is the weather like in Lake Louise in September?
- In September, Lake Louise averages a daily high of 15.2°C and a low of 2.8°C, with about 57.2 mm of rain over roughly 11.6 rainy days.
- What is the air quality in Lake Louise in September?
- Lake Louise has a mean US Air Quality Index of about 37 in September.
- Does it snow in Lake Louise in September?
- Lake Louise sees roughly 16 cm of snowfall in September.
Other months in Lake Louise
Compare Lake Louise in September
Warmer or cooler than Lake Louise in September
Similar destinations in North America — September
Within 300 km: Banff's Larch season around 15 Sep – 5 Oct, and Revelstoke's Meadows in the Sky Parkway around 16 May – 20 Oct.