Monthly climate guide
Bern weather in September
With highs near 19°C (67°F) and lows around 10°C (49°F), September feels mild in Bern. Rainfall averages about 79 mm (some rain) and the sky is often cloudy. Daytime highs are 4°C cooler than August and 5°C warmer than October.
What stands out in September
- Just 50 km apart, but Bern runs about 6°C warmer than Lauterbrunnen this month.
- It cools down fast from here: October is about 4°C cooler.
- September brings early autumn to Bern.
- Skies are at their clearest this time of year.
Avg high
19°C
67°F
Avg low
10°C
49°F
Rainfall
79 mm
some rain
Humidity
78%
relative
Sky
58%
cloud · often cloudy
Bern weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 3°C / 38°F | -3°C / 27°F | 84 mm | 85% | 77% |
| February | 4°C / 39°F | -3°C / 26°F | 64 mm | 83% | 73% |
| March | 9°C / 48°F | 0°C / 32°F | 61 mm | 80% | 66% |
| April | 14°C / 56°F | 4°C / 39°F | 83 mm | 78% | 67% |
| May | 16°C / 61°F | 7°C / 45°F | 137 mm | 79% | 71% |
| June | 21°C / 69°F | 12°C / 53°F | 129 mm | 79% | 66% |
| July | 23°C / 73°F | 14°C / 56°F | 123 mm | 76% | 58% |
| August | 23°C / 73°F | 13°C / 56°F | 109 mm | 74% | 56% |
| September | 19°C / 67°F | 10°C / 49°F | 79 mm | 78% | 58% |
| October | 15°C / 58°F | 6°C / 42°F | 96 mm | 81% | 66% |
| November | 9°C / 48°F | 2°C / 35°F | 80 mm | 84% | 73% |
| December | 5°C / 40°F | -1°C / 29°F | 93 mm | 83% | 74% |
What to pack for September
- T-shirts plus a light layer for the evening
- Comfortable trainers or sandals for long walks
- A compact umbrella or packable rain jacket
- Water-resistant shoes
Is September a good time to visit Bern?
Compare the months in the chart above to find your ideal window.
Best time to visit Bern →Other Switzerland cities in September
Cite or embed this data
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Bern weather in September. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/switzerland/bern/september
<a href="https://weathercompare.eu/weather/switzerland/bern/september">Bern weather in September</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/switzerland/bern" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Bern weather in September"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/switzerland/bern/september">Bern weather in September</a> – WeatherCompare</p>
Bern in September: quick answers
Is September a good time to visit Bern?
Yes. September is one of the best months for Bern, with highs around 19°C and about 79 mm of rain.
How warm is Bern in September?
Average highs are about 19°C (67°F) and average lows about 10°C (49°F), based on 10 years of daily data.
Does it rain a lot in Bern in September?
Bern typically gets around 79 mm of rain in September — some rain.
Figures are long-term averages for the area around Bern (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.