Graz weather by month
The best time to visit Graz is May, June and September — 88/100 in September, 22°C and 9 rainy days. The best season is summer, June to August (84/100 on average).
The worst month is December at 52/100 — cold, a little rain, clean air. See December →
Updated September 2026 · climate normals from ERA5 reanalysis
Planning the wider trip? Best time to visit Austria →
Best season: June to August (84/100 on average) · worst December (52/100)
- Days
- 22°C
- Nights
- 11°C
- Wet days
- 9
- Sun
- 8.8 h
- Humidity
- 78%
- Daylight
- 13 h

Graz, month by month
Comfort score out of 100 for the kind of trip Graz is best for, the average high, rainy days and hours of sun a day from the climate normals, and how busy it tends to be.
What's on in Graz through the year
Festivals, natural spectacles, holidays and the seasons to watch out for — curated and sourced. The month pages carry the detail.
Crowds in Graz 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 crowdsAufsteirern, Summer holidays in Austria, school holidays in 3 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet
Good to know before you go to Graz
Real experiences from travellers' own write-ups, quoted with a link to the original.
Visas & entry
A practical guide to Graz notes it's an easy train trip from elsewhere in Austria, about 2 hours from Vienna and 3 from Linz, and once there the compact "human scale" city center is easily covered on foot or by streetcar without needing a car. Their advice was to give the city at least one full day rather than a rushed half-day stop, and to time a visit for spring or autumn for the mildest weather, or winter specifically for the Christmas market atmosphere if that's the draw.
Traveller notes on Graz
What people who have been say about the place — the year-round notes first, then month by month.
Forum posters describe June as capable of easily reaching 30C on a sunny day, with the honest caveat that the weather is genuinely variable rather than settled - it rarely rains all day, but warm afternoons can give way to an hour or two of torrential evening thunderstorms, especially anywhere near higher ground. The consistent advice is to always carry a waterproof jacket and dress in layers - t-shirts under a jumper - so you can adjust through the day. Overall verdict from posters who've made a June trip: good conditions for sightseeing, just don't expect a guaranteed run of dry days.
Forum posters describe Austrian December temperatures generally ranging between -10C and 10C, with more extreme readings possible but less likely. Posters discussing snow specifically note that while heavy snowfall can happen, the odds of a truly severe snowstorm are fairly low, especially mid-December, and major road closures along well-traveled routes remain rare even when conditions turn wet or snowy. Posters generally describe December as the least snow-reliable month of a typical winter travel window, even though it's often the busiest with holiday markets and events. Posters generally recommend layered winter clothing and treating any snow forecast as a possibility rather than a certainty for a December visit to Graz.
Add your own note from Graz's card on the map.