Graz Weather in September
With daytime temperatures of 21°C (70°F) and nighttime lows of 10°C (50°F), September in Graz brings pleasant temperatures during the day. Do keep in mind that quite a bit of rainfall is typical. Around 93 mm (3.7 in) falls on average.
Rainfall in Graz in September
Expect around 11 days of rain based on historical data, with 93 mm (3.7 in) average. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.
Temperature in Graz in September
Graz in September is worth a visit. The temperature is perfect, with 21°C (70°F) during the day and 10°C (50°F) at night. Conditions are often most pleasant around the middle of the day. With overnight lows of 10°C (50°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.
Sunshine in Graz in September
The city usually sees around 174 hours of sunlight, indicating a moderately sunny period.
Wind Speed in Graz in September
Average wind conditions reach 1 m/s (2 knots) in September. This creates generally peaceful weather with subtle air movement. Remember this is an average: some days are windless while others have noticeable or very gentle breezes.So this is a great month to visit if you prefer dry days with pleasant temperatures.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Austria, check out our Graz's climate page.
Graz Temperature in September
Min Temperature
10°C (50°F)
Max Temperature
21°C (70°F)
Chance of Rain
36%
Precipitation
93 mm (3.7 in)
Rainy days
11 days
Humidity
73%
Windspeed
1 m/s (2 knots)
Sunshine
174 hours
Percentage Sunshine
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Graz typically drop from around 22°C (72°F) at the start of September to approximately 19°C (66°F) by the end. Nights are cool, with lows typically ranging from 8°C (46°F) to 12°C (54°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Graz in September
Browse day-by-day weather records for Graz spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Graz historical weather extremes in September
Based on 49 years of weather observations (1976-2025), these are the most extreme conditions recorded in Graz.
- The hottest September day on record in Graz reached 33°C (91°F) (September 4, 2006).
- The coldest September day was on September 18, 1977, with a maximum of 8°C (46°F).
- The lowest overnight temperature recorded in September was -1°C (30°F) (September 29, 1977).
Best Places in Austria in September
Find out more about the weather in Austria and which places have the best travel conditions in this month. See all of Austria in September →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Graz in September
Comfortable temperatures call for an easy wardrobe in September. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Expect heavy rainfall, so bring good rain protection and waterproof bags. Sunglasses could come in handy during the sunnier parts of your trip.What To Do in Graz in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Austria, check out our Graz's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed
See the full Graz climate overview or explore weather in Austria.
