🇨🇭 Weather in Davos in September
This is what the weather in Davos (Grisons, Switzerland) was like in September in 2017–2026.
Key facts at a glance
Avg. daytime high
13.8 °C
10.0 °C – 17.8 °C
Avg. night-time low
4.0 °C
1.3 °C – 6.9 °C
Avg. rain days in period
16.1
54 % of days · ≥ 1.0 mm
Avg. precipitation in period
129 mm
56.5 mm – 201 mm
Avg. sunshine per day
n/a
Sunshine duration is not available from this data source.
Avg. sea temperature
–
No sea nearby – no sea temperature.
Extremes: Highest temperature 27.6 °C (19 Sep 2025) · Lowest temperature -10.0 °C (27 Sep 2020) · Avg. daily peak wind 9 km/h
Weather mix of all days
- 44Sunny
- 53Partly cloudy
- 21Cloudy
- 78Light rain
- 83Rain
Summary
- On average 13.8 °C during the day and 4.0 °C at night.
- On average 16.1 rain days (Rain day = at least 1.0 mm of precipitation) with 129 mm of precipitation in total.
- Prevailing: Rain.
- Warmest year: 2023 (avg. 17.8 °C), coolest: 2017 (avg. 10.0 °C).
- Wettest year: 2017 (201 mm), driest: 2026 (56.5 mm).
- Extremes: 27.6 °C on 19 Sep 2025 and -10.0 °C on 27 Sep 2020.
Overall values from all 10 years. How is this calculated?
Charts
Temperatures per year
Average over your travel period
Precipitation & rain days
Year by year
2026
Avg. max16.1°Avg. min5.0°- Rain days
- 9 Rain days
- Precipitation
- 56.5 mm
- Avg. sunshine per day
- n/a
- Sea temperature
- –
Max 23.0 °C · Min 0.3 °C
2025
Avg. max14.0°Avg. min4.0°- Rain days
- 19 Rain days
- Precipitation
- 137 mm
- Avg. cloud cover
- 67 % cloudy
- Sea temperature
- –
Max 27.6 °C · Min -1.4 °C
2024
Avg. max11.7°Avg. min2.4°- Rain days
- 21 Rain days
- Precipitation
- 200 mm
- Avg. cloud cover
- 77 % cloudy
- Sea temperature
- –
Max 20.5 °C · Min -4.0 °C
2023
Avg. max17.8°Avg. min6.9°- Rain days
- 8 Rain days
- Precipitation
- 82.9 mm
- Avg. cloud cover
- 48 % cloudy
- Sea temperature
- –
Max 22.7 °C · Min 0.9 °C
2022
Avg. max11.3°Avg. min2.6°- Rain days
- 21 Rain days
- Precipitation
- 163 mm
- Avg. cloud cover
- 69 % cloudy
- Sea temperature
- –
Max 21.6 °C · Min -3.5 °C
2021
Avg. max15.0°Avg. min4.5°- Rain days
- 13 Rain days
- Precipitation
- 90.9 mm
- Avg. cloud cover
- 61 % cloudy
- Sea temperature
- –
Max 18.1 °C · Min -0.1 °C
2020
Avg. max14.1°Avg. min4.7°- Rain days
- 17 Rain days
- Precipitation
- 135 mm
- Avg. cloud cover
- 57 % cloudy
- Sea temperature
- –
Max 21.3 °C · Min -10.0 °C
2019
Avg. max13.3°Avg. min3.5°- Rain days
- 12 Rain days
- Precipitation
- 128 mm
- Avg. cloud cover
- 61 % cloudy
- Sea temperature
- –
Max 19.6 °C · Min -1.2 °C
2018
Avg. max15.0°Avg. min4.7°- Rain days
- 16 Rain days
- Precipitation
- 100 mm
- Avg. cloud cover
- 53 % cloudy
- Sea temperature
- –
Max 20.0 °C · Min -4.7 °C
2017
Avg. max10.0°Avg. min1.3°- Rain days
- 25 Rain days
- Precipitation
- 201 mm
- Avg. cloud cover
- 76 % cloudy
- Sea temperature
- –
Max 15.5 °C · Min -3.6 °C
Frequently asked questions
- How warm is it in Davos in September?
- Daytime highs averaged 13.8 °C, night-time lows 4.0 °C. The highest value of the past 10 years was 27.6 °C (19 Sep 2025), the lowest -10.0 °C (27 Sep 2020).
- How often does it rain in Davos in September?
- On average there were 16.1 rain days (at least 1 mm) with 129 mm of precipitation in total.
Check your exact travel dates
Choose your travel period – we show the weather for exactly those days.
Other destinations in September
Data sources
- Weather data
- Data obtained from the NASA Langley Research Center (LaRC) POWER Project funded through the NASA Earth Science/Applied Science Program
Reanalysis (weather model constrained by observations) on a coarse grid of about 50 km. Values represent a large area and can differ from local conditions, especially on islands, coasts and in mountains. No sunshine duration.
Reanalysis (weather model constrained by observations)
Reanalysis values represent a grid cell (approx. 25–50 km) and may differ from local measurements on coasts, islands and in mountains. - Sea temperature
- MUR SST data were provided by JPL under support by NASA MEaSUREs program; accessed via NOAA CoastWatch ERDDAP
Daily multi-scale ultra-high resolution (≈ 1 km) analysis of satellite measurements (infrared, microwave) and in-situ data. Represents the foundation temperature below the daily warm surface layer. (Satellite and in-situ analysis) - Place search
- Natural Earth (public domain) · GeoNames (CC BY 4.0) / OpenStreetMap (ODbL)