Flims Weather in September
September in Flims brings moderate temperatures around 15°C (59°F) during the day, dropping to 4°C (39°F) at night, with quite a bit of rainfall expected, averaging around 161 mm (6.3 in) for the month.
Rainfall in Flims in September
You can expect rain on roughly 15 days based on historical data, averaging 161 mm (6.3 in) for the month. The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.
Temperature in Flims in September
September in Flims brings moderate temperatures, with highs of 15°C (59°F) and nights around 4°C (39°F). A light jacket or extra layer can be useful, especially outside the warmest hours of the day. With lows around 4°C (39°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.
Sunshine in Flims in September
The area enjoys a balanced 156 hours of sunlight, ensuring it's neither too overcast nor too sunny.If you favor pleasant temperatures and minimal rainfall, September is one of the best months to visit Flims.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Switzerland, check out our Flims's climate page.
Flims Temperature in September
Min Temperature
4°C (39°F)
Max Temperature
15°C (59°F)
Chance of Rain
48%
Precipitation
161 mm (6.3 in)
Rainy days
15 days
Humidity
75% *
Sunshine
156 hours *
Percentage Sunshine
50% *
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Flims typically drop from around 19°C (66°F) at the start of September to approximately 15°C (59°F) by the end. Nights are cold, with lows typically ranging from 7°C (45°F) to 9°C (48°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Flims in September
Browse day-by-day weather records for Flims spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Flims historical weather extremes in September
Our historical data for Flims spans 1982 to 2025, revealing these weather extremes.
- The hottest September day on record in Flims reached 30°C (86°F) (September 3, 2011).
- Flims experienced its chilliest September day on September 14, 2024, reaching only 1°C (34°F).
- The coldest night in September in Flims was on September 28, 1989, with a minimum of -5°C (23°F).
- Peak precipitation in September occurred on September 17, 2006, when 61 mm (2.4 in) of precipitation was measured.
Best Places in Switzerland in September
Find out more about the weather in Switzerland and which places have the best travel conditions in this month. See all of Switzerland in September →
perfect weather
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unpleasant
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What to Wear in Flims in September
The weather can swing between comfortable and chilly in September, so flexibility is key. Pack a variety of tops, at least one warm layer, and both shorts and long pants. This gives you options no matter what the day brings. It's going to pour! Pack a good poncho and prepare for very wet conditions. Sunglasses could come in handy during the sunnier parts of your trip.What To Do in Flims in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Switzerland, check out our Flims's climate page.
Temperature Rainfall Sunshine Humidity
See the full Flims climate overview or explore weather in Switzerland.
