The temperatures in Upper Austria in September are quite cold with temperatures between 5°C and 15°C, warm clothes are a must.
You can expect rain for roughly half of the month of September in Upper Austria. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Please note that Upper Austria can expect a few days of snow in September.
Our weather forecast can give you a great sense of what weather to expect in Upper Austria in September 2025.
If you’re planning to visit Upper Austria in the near future, we highly recommend that you review the 14 day weather forecast for Upper Austria before you arrive.
Temperatures
15° / 5°
Rainy Days
11
Snowy Days
2
Dry Days
17
Rainfall
199
mm
Sun Hours
9.6
Hrs
