May is comfortable for sightseeing, with pleasant temperatures and blooming countryside; many hiking trails at lower elevations are open. This is a popular shoulder month for travelers seeking fewer crowds than July/August.
Average daily low and high (°C) and monthly rainfall. The badge shows how it feels, allowing for humidity.
Average temperature across Austria in May.
Tyrol & Vorarlberg
Midsummer keeps the high valleys pleasantly cool - days in the 20s°C in valley bottoms with nights dipping chilly; villages such as St. Anton, Mayrhofen and Kitzbühel host mountain festivals and weekly markets. Afternoon thunderstorms are routine; they can close some via ferrata or exposed ridges by mid-afternoon, so start early. Crowds lift a little from the big Alpine passes as bikers and hikers peak; bring sunblock for the strong high-altitude sun.
Central Alps and lake district
Midsummer brings lake-swimming weather in the Salzkammergut and long, pleasant days in Salzburg - daytime highs commonly reach the low to mid 20s°C. Mountain trails and cable cars are in full service, and the city becomes an easy base for day trips to lakes and alpine hikes. Afternoon thunderstorms can appear over the Dachstein; start hikes early and keep rain protection handy.
Vienna, Lower Austria & Burgenland
Midsummer brings warm to hot weather to the Pannonian east; Vienna, Eisenstadt and Neusiedl can reach the high 20s to low 30s°C, and humidity can feel pronounced during heat waves. Thunderstorms occasionally erupt in the afternoons and evenings; they can be fierce but short-lived, causing temporary cancellations to open-air concerts. Pack light summer clothing, sun protection and a small fan if you’re heat-sensitive.
Carinthia & Southern Styria
Midsummer keeps warm, with Klagenfurt and Graz nearby often reaching the mid-to-high 20s°C and sometimes nudging 30°C on heatwave days. Lake activity peaks at Wörthersee and swimming, sailing and stand-up paddling are busy; evenings cool to comfortable levels. Occasional thunderstorms can form inland, so plan mountain hikes for early morning and bring insect repellent for lakeside evenings.
Upper Austria, Mühlviertel, Waldviertel
Midsummer warms the plateaus into the low to mid 20s°C on average with comfortable nights and plenty of outdoor activity around lakes and rivers. Short, heavy thunderstorms can interrupt afternoon plans, but otherwise it’s a pleasant time for forest walks and visiting castles and open-air events. Insect repellent and a light rain shell are useful items to carry in this region.
There are no major festivals or events in Austria during May to be aware of.
See how May compares with the rest of the year, then read the full guide.