Thredbo weather in September

September in Thredbo: cold, soaked, with clean air — a gamble, with 14 rainy days.

Updated September 2026 · climate normals from ERA5 reanalysis

Thredbo🇦🇺 Australia · Southeast Australia & Tasmania · Ski64
  1. 12Jan
  2. 15Feb
  3. 23Mar
  4. 36Apr
  5. 56May
  6. 71Jun
  7. 78Jul
  8. 81Aug
  9. 64Sep
  10. 43Oct
  11. 31Nov
  12. 18Dec

#4 of 12 months in Thredbo · #1071 of 1413 destinations to visit in September · comfort 64/100 (tier C)

Days
7°C
Nights
-3°C
Wet days
14
Sun
9.4 h
Humidity
78%
Daylight
12 h
Thredbo, Australia
Photo: Kate Trifo · Pexels

Traveller notes on Thredbo in September

Thredbo-forum threads on late-season snow describe September as genuinely still skiable, posters calling the village noticeably slushy underfoot as afternoon temperatures climb, ordinary shoes soaking through fast off a cleared path. Regulars call July through early September the more reliable stretch for firmer cover, September itself increasingly variable. Posters describe waterproof boots as standard by this point, packed snow turning to slush by midday even on a cold morning. Regulars call the lifts still running and trails open right through the month, base depth simply thinner than peak winter. Posters recommend checking the snow report the morning of rather than a week-old post. Regulars call the scenery worth a visit even for a non-skier, boardwalk trails open regardless of snow cover. The record: 6.6C days feeling like 4C, -2.6C nights, an extraordinarily high 181mm across nearly 14 days and 78 percent humidity.
ThredboSeptemberRegular · September · 1 month ago · Read more on Tripadvisor ↗

Other months in Thredbo

Thredbo-forum reviews on a February visit describe the summit as genuinely cooler than town, one late-February climber naming roughly twelve degrees at the top against seventeen back in Jindabyne. Regulars call the chairlift a real standard way up, several posters naming about an hour and forty-five minutes to reach the summit from there. Posters call forecasts genuinely unreliable this time of year, one visitor recalling predicted showers that turned into a sunny day instead. Regulars call summer conditions here genuinely bare of any real cover, several threads naming only the odd off-track patch as anything resembling winter terrain. Posters recommend checking the Bureau of Meteorology forecast for Thredbo specifically and packing a rain jacket regardless, several regulars calling this standard given how fast mountain weather changes. The record: 17.3C days, 6.4C nights, 94.9mm across over 8 days and 69 percent humidity.
ThredboFebruaryRegular · February · 1 month ago · Read more on Tripadvisor ↗
Thredbo-forum reviews on a March visit call the walk to Kosciuszko a genuine must-do, posters describing the raised walkway from the top of the chairlift as a relatively easy route to Australia's highest point this time of year. Regulars call the chairlift a real time-saver, the alternative full walk from the village considerably longer than most visitors expect. Posters recommend the bobsled and leisure centre as solid additions beyond the main hike, an all-mountain pass covering both alongside tennis and golf. Regulars call March genuinely pleasant for hiking, conditions here still comfortable before the weather turns firmly toward autumn. Posters recommend a park pass regardless of exact plans, required simply to stop within the wider national park. The record: 15C days feeling like 15C, 5.1C nights, an extraordinarily high 113.9mm across nearly 10 days and 68 percent humidity.
ThredboMarchRegular · March · 1 month ago · Read more on Tripadvisor ↗
Thredbo-forum threads asking whether real snow is likely in June describe the season as officially starting around the June long weekend, though posters call an early opening never guaranteed. Regulars describe one recent year where a cold front rolled through just before the long weekend, the mountain turning white by Friday night after days of bare ground. Posters call natural cover this early often thin and patchy, man-made cover from the resort's guns doing real work on the main runs regardless of what's fallen naturally. Regulars recommend checking the resort's own snow report rather than a seasonal average, conditions here capable of shifting within days. Posters call real layers essential regardless of cover, the alpine cold genuinely biting even on a clear day. Regulars call the village worth visiting even on a thin-cover week, the mountain scenery striking regardless. The record: 2.4C days feeling like -1C, -3.5C nights, 152.3mm across nearly 11 days and 86 percent humidity.
ThredboJuneRegular · June · 1 month ago · Read more on Tripadvisor ↗
Thredbo-forum threads on summer visits confirm January as the warmest month of the year here, alpine-region weather that regulars call genuinely changeable day to day despite the summer label - warm, occasionally intense stretches punctuated by cooler, breezier days without much warning. Posters describe flies as a real nuisance on the warmer days, worth factoring into any picnic or trail lunch plans. The village runs a full summer activity program well beyond the winter sport it is known for, and mid-January specifically overlaps with the Thredbo Blues Festival, drawing real crowds for those dates. Regulars planning the chairlift walk up to Mount Kosciuszko itself recommend carrying layers and a waterproof regardless of how clear the morning looks, since mountain weather here is called capable of shifting fast even in peak summer. The record: 18.7C days feeling like 19C, 7.9C nights, a notably high 162mm across 10 days, 69 percent humidity and 11.8 hours of sun.
KosciuszkoJanuaryRegular · January · 1 month ago · Read more on tripadvisor.com.au ↗

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Thredbo climate normals — September

Daytime high7°C / 44°F🧥 cold
Nighttime low-3°C / 27°F
Feels like (high)4°C / 39°F
Rainfall181 mm / 7.1 in⛈ soaked
Rainy days14 days
Humidity78%💦 very humid
Dew point0°C / 32°F
Sunshine9.4 h/day
Daylight11.9 h
Wind13 km/h / 8 mph
Snowfall11.5 cm / 4.5 in
Air quality (US AQI)26🍃 good

Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.

Crowds in Thredbo 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 crowdsWinter season, Spring break in Australia, school holidays in 2 of the markets that fill it(estimated)

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Peak crowdsBusyShoulder seasonQuiet

Best months for Thredbo'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 weatherThredbo's weather peaks June–August.

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Best weatherFair weatherToughest weather

What's on in Thredbo in September

Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.

  • Season

    Winter season

    5 Jun – 5 Oct · usuallySki seasonCrowded

    Lifts run from the June long weekend to the October long weekend, held up by snowmaking on the lower runs. Thredbo has the longest vertical in Australia, which is not the same as the most reliable snow. Source ↗

What's on around the world in September →

Nearby, and something's on

Within 300 km of Thredbo — a day trip or a short hop — with something on this month. Never part of the comfort score.

Where is Thredbo?

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Thredbo in September — FAQ

Is September a good time to visit Thredbo?
September in Thredbo: cold, soaked, with clean air — a gamble, with 14 rainy days. It ranks #4 of 12 months for Thredbo on SeasonMap's comfort score (64/100).
What is the weather like in Thredbo in September?
In September, Thredbo averages a daily high of 6.6°C and a low of -2.6°C, with about 181 mm of rain over roughly 13.7 rainy days.
What is the air quality in Thredbo in September?
Thredbo has a mean US Air Quality Index of about 26 in September.
Does it snow in Thredbo in September?
Thredbo sees roughly 11.5 cm of snowfall in September.

Within 300 km: Canberra's Floriade on 12 Sep – 11 Oct.