If you plan to visit Graz in September, the weather is typically alright, with an average high temperature of +20°C during the day and approximately 6 sunny days. Expect some rainy, though, as there are typically 13 rainy days in the month and around 96 mm of precipitation. The weather is changeable so you may have to pack for every eventuality. Search flightsin one click on Avionero.
Average weather
☀️
+20°C
Avg. max. temperature
0°C
Min.
+31°C
Max.
96 mm
Total precipitation
77%
Avg. humidity
1 m/s
Avg. wind
6 ☀️
Sunny Days
9 ⛅️
Cloudy
13 🌦
Rainy
Our opinion: Graz has OK weather in September.
Average temperature in Graz in September
Here are the expected maximum, average and minimum temperatures in Graz for September based on the historical data.
Last Year
Historical Data
Going from a maximum of +29°C during the day to a minimum of +10°C during the night, the temperature in September averages around +25°C.
The average maximum temperature goes down 5% by the end of the month, compared with the beginning of the month, from +26°C to +25°C.
Is Graz warm or cold in September?
Graz is typically mild in September.
Maximum temperatures go down compared to the previous month from +25°C to +20°C. The minimum temperature also goes down from +14°C to +10°C.
Pack a light jacket as it will be warm in the day and cool in the evenings.
Take a look at how September is compared to other months in Graz:
Climate in Graz in September
Graz weather looks like this, on average, in September and the surrounding months.
August
September
October
Avg. temperature
+25°C
+20°C
+15°C
Min. temperature
+5°C
0°C
-6°C
Max. temperature
+38°C
+31°C
+28°C
Rainfall
127 mm
96 mm
68 mm
Wind
1 m/s
1 m/s
1 m/s
Humidity
73%
77%
81%
Air pressure
1015 HPa
1016 HPa
1018 HPa
Sunny days
6
6
4
Cloudy days
5
9
13
Rainy days
13
13
12
Snowy days
0
0
0
September typically has worse weather conditions compared to August.It’s getting colder in September. From +25°C in the day, the average maximum temperature lowers to +20°C.As September arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 127 mm to 96 mm.Humidity rises from 73% to 77%.The average wind speed doesn’t change much during September, staying around 1 m/s.The amount of sunny days stay about the same, averaging 6 sunny days during the month.
October brings much the same weather, it remains ok.
Wind speed in Graz in September based on historical data.
Last Year
Historical Data
The average wind speed is 1 m/s getting up to 3 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Graz is gradually increasing during September, going from 1 m/s to 1 m/s over the course of the month.
Rain
Amount of rainfall in mm during September in Graz based on historical data.
Last Year
Historical Data
Typically, there is a 20% chance of rain on an average day in September, with total rainfall of approximately 46 mm. The maximum amount of rainfall per day is around 19 mm, which is considered light rain.On average, there are about 6 rainy days during September, so prepare to bring an umbrella.
Here’s how September is compared with other months in the amount of precipitation, total mm:
Graz wettest month is June, where a typical day has a 43% chance of precipitation and 128 mm of rainfall per day. January, on the other hand, is the driest month with a mere 10% chance of precipitation and 14 mm of rainfall per day.
How was the weather last September in Graz?
This is the weather in Graz in September 2023:
1 September
☀️
+26°C
2 September
☀️
+28°C
3 September
☀️
+26°C
4 September
☀️
+24°C
5 September
☀️
+24°C
6 September
☀️
+27°C
7 September
☀️
+27°C
8 September
☀️
+28°C
9 September
☀️
+28°C
10 September
☀️
+29°C
11 September
☀️
+29°C
12 September
☀️
+29°C
13 September
☀️
+29°C
14 September
☁️
+23°C
15 September
☁️
+23°C
16 September
☀️
+24°C
17 September
☀️
+28°C
18 September
☀️
+25°C
19 September
☀️
+24°C
20 September
☀️
+26°C
21 September
☀️
+27°C
22 September
☀️
+25°C
23 September
🌧️
+17°C
24 September
☁️
+15°C
25 September
☁️
+19°C
26 September
☀️
+26°C
27 September
☀️
+26°C
28 September
☀️
+25°C
29 September
☀️
+26°C
30 September
☀️
+25°C
In September 2023 Graz had 25 sunny days, 4 cloudy days, and 1 rainy days. The average maximum temperature was +25°C, with an absolute maximum of +29°C and a minimum of +15°C. The average humidity was 78%, with a maximum of 100% and a minimum of 43%. The average wind speed was 1 m/s, with a maximum of 8 m/s and a minimum of 0 m/s.
Are you planning a trip in September?
Climate Change over Years
This is how Graz climate have been changing during last 43 years period.
The climate in Graz in September has not changed much over the last 43 years.
The average temperature was the lowest in 1980 (+12°C) and the highest in 2022 (+17°C). The driest year was 2003 with only 565 mm of rainfall, and the wettest year was 2014 with 1792 mm.
FAQ
Frequently asked questions about the weather in Graz in September:
Is September a good time to visit Graz?
It’s always a good time to visit Graz, but the weather is changeable in September, so plan a mix of indoor and outdoor activities and exploring, and pack for every eventuality.
Can you sunbathe in Graz in September?
September has mild temperatures in Graz. Not ideal for sunbathing, but still good for daytime outdoor activities, but plan for cool evenings. Pack a light jacket and shorts!
Is Graz rainy in September?
Graz is often rainy in September. You may get a bit damp when outside, so pack an umbrella, and maybe even a raincoat.
Is it sunny in Graz in September?
Usually, it’s not very sunny in Graz in September, often it’s pretty cloudy. Pack for any eventuality; layering can help reduce the number of bulky items needed.
Other cities in Austria
Check out the weather for other cities in Austria.
For this page, we’ve looked at the typical weather in Graz, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.