Upper Austria weather in September
September is one of the best months to visit Upper Austria: highs of 18°C (64°F) and about 80 mm (3.1 in) of rain on average. Nights average 8°C (46°F) and cloud cover 63% (NASA POWER, 2001–2025 averages). It is the 5th wettest month of the year and the 4th warmest. Compared with August, it is cooler and drier; October brings highs of 12°C (54°F) and 60 mm (2.4 in) of rain.
Figures are long-term averages for Linz, the largest city in Upper Austria. See below for other places.
Is September a good time to visit Upper Austria?
best month Weather score 67/100.
Yes. September is one of the best months for weather in Upper Austria.
Does it rain a lot in Upper Austria in September?
Some rain is normal: about 80 mm (3.1 in) falls in an average September. It is the 5th wettest month of the year.
How warm is Upper Austria in September?
Days average 18°C (64°F) and nights 8°C (46°F).
Upper Austria weather by month
| Month | High | Low | Rain | Cloud | Weather |
|---|---|---|---|---|---|
| January | 0°C (31°F) | -6°C (21°F) | 61 mm | 81% | least pleasant |
| February | 2°C (35°F) | -5°C (22°F) | 46 mm | 78% | least pleasant |
| March | 7°C (44°F) | -2°C (28°F) | 59 mm | 71% | least pleasant |
| April | 13°C (56°F) | 2°C (36°F) | 48 mm | 63% | fair |
| May | 17°C (63°F) | 7°C (45°F) | 97 mm | 69% | best |
| June | 21°C (70°F) | 11°C (52°F) | 112 mm | 68% | best |
| July | 23°C (74°F) | 13°C (55°F) | 109 mm | 64% | best |
| August | 23°C (73°F) | 13°C (55°F) | 109 mm | 59% | best |
| September | 18°C (64°F) | 8°C (46°F) | 80 mm | 63% | best |
| October | 12°C (54°F) | 3°C (38°F) | 60 mm | 70% | fair |
| November | 6°C (43°F) | 0°C (31°F) | 49 mm | 79% | least pleasant |
| December | 1°C (34°F) | -4°C (24°F) | 51 mm | 82% | least pleasant |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis). Page updated . How we rate months
Weather across Upper Austria in September
Weather can differ a lot within Upper Austria: coasts, hills and mountains each have their own climate.