Monthly climate guide
Bratislava weather in September
Expect warm weather in Bratislava in September: afternoons reach about 23°C (74°F), while nights drop to around 12°C (53°F). Around 70 mm of rain falls over the month (some rain), and skies are often cloudy. Daytime highs are 6°C cooler than August and 7°C warmer than October.
What stands out in September
- Temperatures are falling — expect highs around 7°C lower by October.
- Bratislava is usually about 7°C warmer than Poprad, 260 km away, in September.
- Seasonally, September counts as early autumn in Bratislava.
- Evenings cool off sharply: the daily range is around 11°C, so pack a layer.
Avg high
23°C
74°F
Avg low
12°C
53°F
Rainfall
70 mm
some rain
Humidity
66%
relative
Sky
60%
cloud · often cloudy
Bratislava weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 3°C / 37°F | -3°C / 26°F | 40 mm | 89% | 81% |
| February | 5°C / 42°F | -2°C / 28°F | 38 mm | 85% | 75% |
| March | 11°C / 52°F | 1°C / 34°F | 33 mm | 77% | 63% |
| April | 17°C / 63°F | 6°C / 42°F | 34 mm | 70% | 59% |
| May | 21°C / 70°F | 10°C / 50°F | 79 mm | 68% | 64% |
| June | 26°C / 79°F | 15°C / 59°F | 67 mm | 62% | 62% |
| July | 29°C / 84°F | 17°C / 62°F | 69 mm | 57% | 60% |
| August | 29°C / 84°F | 17°C / 62°F | 59 mm | 58% | 53% |
| September | 23°C / 74°F | 12°C / 53°F | 70 mm | 66% | 60% |
| October | 17°C / 62°F | 7°C / 44°F | 56 mm | 78% | 68% |
| November | 10°C / 49°F | 3°C / 37°F | 41 mm | 87% | 75% |
| December | 5°C / 40°F | -1°C / 30°F | 39 mm | 90% | 80% |
What to pack for September
- T-shirts plus a light layer for the evening
- Comfortable trainers or sandals for long walks
- An extra layer — evenings are noticeably cooler than afternoons
- A compact umbrella or packable rain jacket
- Water-resistant shoes
Is September a good time to visit Bratislava?
Compare the months in the chart above to find your ideal window.
Best time to visit Bratislava →Other Slovakia cities in September
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Bratislava weather in September. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/slovakia/bratislava/september
<a href="https://weathercompare.eu/weather/slovakia/bratislava/september">Bratislava weather in September</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/slovakia/bratislava" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Bratislava weather in September"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/slovakia/bratislava/september">Bratislava weather in September</a> – WeatherCompare</p>
Bratislava in September: quick answers
Is September a good time to visit Bratislava?
September is a reasonable time for Bratislava: highs around 23°C and about 70 mm of rain, though not one of the three best months.
How warm is Bratislava in September?
Average highs are about 23°C (74°F) and average lows about 12°C (53°F), based on 10 years of daily data.
Does it rain a lot in Bratislava in September?
Bratislava typically gets around 70 mm of rain in September — some rain.
Figures are long-term averages for the area around Bratislava (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.