Bern in September
In September, Bern averages 19°C (67°F) during the day and 10°C (50°F) at night, with around 11 days of rain (80 mm total).
High seasonConditions are comfortable for sightseeing without being sweltering. Plan for unsettled weather and bring rain gear.
September offers comfortable temperatures in Bern, with some rain to plan around.
How September compares to the rest of the year in Bern
September is in the middle of the year for warmth in Bern (4th of 12) and one of the driest months (12th of 12). Daytime temperature runs 5°C above the annual average (14°C). September runs 4°C cooler than August (23°C) and cools 4°C in October (15°C).
September sunrise & sunset in Bern
Times shown for Bern local time (Europe/Zurich), calculated for the 15th of September. They shift by a few minutes day to day across the month.
Photography light in Bern — September
Golden-hour and blue-hour windows for the 15th of September, in Bern's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Bern in September
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on September's tier (High season) and Bern's popularity.
Crowds & pricing — September in Bern
This is a busy month in Bern — not the absolute peak, but tourist numbers are clearly elevated. You'll feel it at headline attractions on weekends and in the historic centre, though side streets and lesser-known sights stay manageable. Prices are above off-season but not at their summit. A good week for first-time visitors who want everything open without the worst of the crush.
Why this tier: excellent tourism weather
Sun & mosquito risk — September in Bern
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
Bern in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 4°C / 39°F | -3°C / 27°F | 94 mm | 14 | — |
| February | 6°C / 44°F | -2°C / 29°F | 73 mm | 12 | — |
| March | 10°C / 50°F | 0°C / 32°F | 73 mm | 13 | — |
| April | 14°C / 56°F | 3°C / 38°F | 91 mm | 12 | — |
| May | 17°C / 62°F | 7°C / 45°F | 138 mm | 17 | — |
| June | 22°C / 71°F | 12°C / 54°F | 126 mm | 15 | — |
| July | 24°C / 75°F | 14°C / 57°F | 129 mm | 15 | — |
| August | 23°C / 74°F | 14°C / 56°F | 115 mm | 14 | — |
| September | 19°C / 67°F | 10°C / 50°F | 80 mm | 11 | — |
| October | 15°C / 59°F | 6°C / 43°F | 91 mm | 12 | — |
| November | 9°C / 47°F | 1°C / 34°F | 101 mm | 13 | — |
| December | 5°C / 42°F | -1°C / 30°F | 104 mm | 14 | — |
Other cities with similar September weather
🌍 See the full ranked list of climate twins for Bern in September →
Frequently asked questions
How hot is Bern in September?
In September, Bern averages a high of 19°C (67°F) and a low of 10°C (50°F) — generally mild and pleasant.
Does it rain a lot in Bern in September?
September can be fairly wet in Bern, with about 11 rainy days on average.
Is September a good time to visit Bern?
September is mild and pleasant. It suits travelers who are comfortable with mild and pleasant weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for Bern in September?
Pack light layers for warm days and cooler evenings, plus a compact umbrella or rain jacket. See the full September packing list for Bern for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.