Weather in Bratislava in September 2025
Average weather
Average temperature in Bratislava in September
The temperature in September is +79°F on average, with a range between a maximum of +91°F during the day and a minimum of +54°F at night.
The average maximum temperature goes down 10% by the end of the month, compared with the beginning of the month, from +77°F to +73°F.
Is Bratislava warm or cold in September?
Bratislava is typically mild in September.
Maximum temperatures go down compared to the previous month from +79°F to +70°F. The minimum temperature also goes down from +61°F to +54°F.
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 Bratislava:
Climate in Bratislava in September
| August | September | October | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +79°F | +70°F | +59°F | ||||
| Min. temperature | ||||||
| +43°F | +37°F | +21°F | ||||
| Max. temperature | ||||||
| +102°F | +91°F | +81°F | ||||
| Rainfall | ||||||
| 64 mm | 61 mm | 41 mm | ||||
| Wind | ||||||
| 2 m/s | 2 m/s | 2 m/s | ||||
| Humidity | ||||||
| 65% | 71% | 77% | ||||
| Air pressure | ||||||
| 1013 HPa | 1015 HPa | 1016 HPa | ||||
| Sunny days | ||||||
| 12 | 11 | 9 | ||||
| Cloudy days | ||||||
| 3 | 6 | 10 | ||||
| Rainy days | ||||||
| 11 | 11 | 12 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
September weather is still as good as in August. It’s getting colder in September. From +79°F in the day, the average maximum temperature lowers to +70°F. As September arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 64 mm to 61 mm. Humidity rises from 65% to 71%. The average wind speed doesn’t change much during September, staying around 2 m/s. The days becoming less sunny, going from 12 sunny days in August to 11 in September.
Next month (October) brings a further decline in the weather.
Wind
The average wind speed is 2 m/s getting up to 6 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Bratislava is gradually increasing during September, going from 2 m/s to 3 m/s over the course of the month.
Rain
How was the weather last September in Bratislava?
Climate Change Over the Years
The climate in Bratislava in September has not changed that much over the last 43 years.
The average temperature was the lowest in 1980 (+55°F) and the highest in 2023 (+62°F). The driest year was 2003 with only 321 mm of rainfall, and the wettest year was 2023 with 777 mm.
FAQ
Is September a good time to visit Bratislava?
Can you sunbathe in Bratislava in September?
Is Bratislava rainy in September?
Is it sunny in Bratislava in September?
Monthly weather in Bratislava
Source of the data
For this page, we’ve looked at the typical weather in Bratislava, 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.