Monthly climate guide
Prague weather in September
With highs near 21°C (70°F) and lows around 10°C (49°F), September feels mild in Prague. Rainfall averages about 50 mm (some rain) and the sky is often cloudy. Daytime highs are 5°C cooler than August and 6°C warmer than October.
What stands out in September
- Skies are at their clearest this time of year.
- September brings early autumn to Prague.
- It cools down fast from here: October is about 6°C cooler.
- Evenings cool off sharply: the daily range is around 11°C, so pack a layer.
Avg high
21°C
70°F
Avg low
10°C
49°F
Rainfall
50 mm
some rain
Humidity
71%
relative
Sky
64%
cloud · often cloudy
Prague weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 2°C / 35°F | -4°C / 25°F | 43 mm | 92% | 86% |
| February | 4°C / 39°F | -4°C / 25°F | 30 mm | 88% | 78% |
| March | 9°C / 48°F | -1°C / 31°F | 35 mm | 82% | 69% |
| April | 15°C / 59°F | 4°C / 38°F | 36 mm | 75% | 65% |
| May | 19°C / 66°F | 8°C / 46°F | 69 mm | 72% | 68% |
| June | 24°C / 74°F | 12°C / 54°F | 84 mm | 68% | 68% |
| July | 26°C / 78°F | 14°C / 58°F | 75 mm | 63% | 68% |
| August | 26°C / 79°F | 14°C / 57°F | 74 mm | 64% | 62% |
| September | 21°C / 70°F | 10°C / 49°F | 50 mm | 71% | 64% |
| October | 15°C / 58°F | 5°C / 41°F | 55 mm | 82% | 72% |
| November | 8°C / 46°F | 1°C / 34°F | 37 mm | 90% | 79% |
| December | 4°C / 39°F | -2°C / 29°F | 39 mm | 92% | 83% |
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 small travel umbrella, just in case
Is September a good time to visit Prague?
Compare the months in the chart above to find your ideal window.
Best time to visit Prague →Other Czech Republic cities in September
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Prague weather in September. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/czech-republic/prague/september
<a href="https://weathercompare.eu/weather/czech-republic/prague/september">Prague weather in September</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/czech-republic/prague" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Prague weather in September"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/czech-republic/prague/september">Prague weather in September</a> – WeatherCompare</p>
Prague in September: quick answers
Is September a good time to visit Prague?
Yes. September is one of the best months for Prague, with highs around 21°C and about 50 mm of rain.
How warm is Prague in September?
Average highs are about 21°C (70°F) and average lows about 10°C (49°F), based on 10 years of daily data.
Does it rain a lot in Prague in September?
Prague typically gets around 50 mm of rain in September — some rain.
Figures are long-term averages for the area around Prague (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.