About Arosa
Arosa is a Swiss municipality located in the canton of Graubünden (GR), at 46.850° latitude and 9.616° longitude. The municipality is part of the eastern Alps, alpine climate with snowy winters and cool summers. Also known as Arosa, Arosa benefits from precise weather monitoring with hourly and 15-day forecasts.
Climate of Arosa
The climate in Arosa is characteristic of the eastern Alps, alpine climate with snowy winters and cool summers. Temperatures, precipitation and wind conditions vary throughout the year with local features linked to altitude and surrounding terrain. Our data comes from official weather stations and real-time Netatmo sensors for Arosa and neighboring municipalities.
On this page you will find the detailed weather forecast for Arosa: current temperature, 48-hour hourly forecast, 15-day forecast, air quality, UV index, wind, precipitation and weather alerts. Updated hourly.
Climate of Arosa: 1991–2020 normals
In Arosa (1741 m), the mean annual temperature is 4.1 °C. The warmest month is July (12.7 °C on average) and the coldest January (−4.1 °C). About 1182 mm of precipitation falls per year, peaking in August (162 mm) with a minimum in February (61 mm). The sun shines for about 1684 hours a year, mostly in July (191 h). On average there are 158 frost days per year. The mean monthly maximum reaches 25.5 °C and the absolute minimum −15.0 °C.
Mean monthly precipitation (mm) — bar height relative to the wettest month.
| Month | Mean T | Abs. max | Abs. min | Precip. (mm) | Sunshine (h) | Frost days | Summer days |
|---|---|---|---|---|---|---|---|
| Jan | −4.1 °C | 7.0 °C | −15.0 °C | 77 | 107 | 29 | 0 |
| Feb | −3.6 °C | 8.8 °C | −14.6 °C | 61 | 111 | 26 | 0 |
| Mar | −0.4 °C | 12.2 °C | −11.3 °C | 74 | 145 | 24 | 0 |
| Apr | 3.1 °C | 15.5 °C | −7.8 °C | 72 | 153 | 17 | 0 |
| May | 7.3 °C | 20.4 °C | −2.7 °C | 97 | 157 | 6 | 0 |
| Jun | 10.9 °C | 24.3 °C | 0.7 °C | 131 | 166 | 1 | 0 |
| Jul | 12.7 °C | 25.5 °C | 3.0 °C | 140 | 191 | 0 | 1 |
| Aug | 12.5 °C | 24.9 °C | 2.6 °C | 162 | 182 | 0 | 0 |
| Sep | 8.6 °C | 20.3 °C | −0.9 °C | 106 | 152 | 3 | 0 |
| Oct | 5.0 °C | 17.5 °C | −5.5 °C | 90 | 136 | 8 | 0 |
| Nov | 0.1 °C | 12.4 °C | −10.0 °C | 92 | 96 | 18 | 0 |
| Dec | −3.2 °C | 7.5 °C | −13.6 °C | 81 | 88 | 27 | 0 |
| Year | 4.1 °C | 25.5 °C | −15.0 °C | 1182 | 1684 | 158 | 1 |
Source: MeteoSwiss open data (1991–2020 normals) — stations Chur (7 km, 556 m), Arosa (8 km, 1878 m), Weissfluhjoch (15 km, 2691 m), adjusted to the elevation of Arosa (1741 m) using a 0.55 °C/100 m lapse rate. Indicative, rounded values.
Nearby cities
Check the weather of cities near Arosa:
- Weather Churwalden
- Weather Chur
- Weather Trimmis
- Weather Furna
- Weather Fideris
- Weather Zizers
- Weather Untervaz
- Weather Vaz/Obervaz
- Weather Felsberg
- Weather Jenaz
- Weather Landquart
- Weather Domat/Ems
→ Nearby cities · Canton Graubünden
⛷️ Ski resorts in this municipality: Arosa
Frequently asked questions about weather in Arosa
What is the weather in Arosa today?
At the top of the page you will find the current temperature, precipitation and wind in Arosa, updated in real time.
What is the 15-day forecast for Arosa?
The "15-day forecast" section shows min/max temperatures, precipitation and wind expected for the next 15 days in Arosa.
Will it rain tomorrow in Arosa?
Check the 48-hour hourly forecast to see exactly when precipitation is expected in Arosa.
What is the air quality in Arosa?
The air quality section displays the AQI index and PM2.5, PM10 and ozone concentrations measured near Arosa.
Are there weather alerts for Arosa?
Weather alerts (storms, high winds, extreme temperatures) are shown as a banner at the top of the page when active.
At what altitude is Arosa located?
Arosa sits at around 1741 m above sea level in the canton of Graubünden. This elevation directly affects the temperatures, rain-snow line and snow cover shown in the forecasts.
What is the warmest month in Arosa?
The warmest month in Arosa is July, averaging 12.7 °C (1991–2020 normal). The coldest is January at −4.1 °C.
How much does it rain in Arosa per year?
Arosa receives about 1182 mm of precipitation a year. The wettest month is August (162 mm), the driest February (61 mm).
When is the best time to visit Arosa?
For warmth and sunshine: July (12.7 °C on average, 191 h of sun). The coldest month is January (−4.1 °C). Check the 15-day forecast above for your dates.