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.

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Home › Graubünden › Arosa

Weather in Arosa

Graubünden, 1741 m · continuously updated

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Wind: –
Humidity: –
Rain ahead: –
Sunset: –

Temperature · last 4 and next 28 hours

Arosa weather: the next 24 hours

Updated hourly.

Arosa weather hour by hour (48 h)

Arosa 15-day forecast

Two-week trend.

Arosa weekend weather Rain radar

Sun and golden hours

Sunrise –, golden light until –

Sunset –, golden light from –

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Air quality

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European index, measured continuously.

UV index

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Daily maximum — protection advised from 3.

Freezing level

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Snow settles about 300 m below it.

Around Arosa

Neighbouring municipalities, as the crow flies.

Churwalden6 km Chur6 km Trimmis6 km Furna8 km Fideris10 km Zizers11 km Untervaz11 km Vaz/Obervaz11 km

7-day forecast for Arosa

Today (Sunday 27 Sep) in Arosa: sunny, 11 to 19 °C, precipitation 0.0 mm (0 %), wind up to 10 km/h. Tomorrow: partly cloudy, 13 to 20 °C.

Day	Weather	Min	Max	Precip.	Wind
Today	sunny	11 °C	19 °C	0.0 mm	10 km/h
Tomorrow	partly cloudy	13 °C	20 °C	0.0 mm	9 km/h
Tue 29 Sep	overcast	10 °C	20 °C	0.0 mm	11 km/h
Wed 30 Sep	overcast	11 °C	18 °C	0.0 mm	11 km/h
Thu 1 Oct	light rain	9 °C	14 °C	8.1 mm	9 km/h
Fri 2 Oct	fog	7 °C	14 °C	0.0 mm	6 km/h
Sat 3 Oct	overcast	7 °C	17 °C	0.0 mm	9 km/h

Forecast updated on 27.09.2026 at 04:37 (Open-Meteo model, elevation 1741 m). The interactive block at the top refreshes hourly and covers 16 days.

No rain expected in Arosa today or tomorrow. The 15-minute detail for the next two hours is shown on demand.

Hourly weather in Arosa

Sunday 27 Sep in Arosa, hour by hour: sunny in the morning, sunny in the afternoon, sunny in the evening. Low 11 °C around 07:00, high 19 °C around 15:00. No rainy hour.

Show the 24-hour table

Time	Weather	Temp.	Wind
00:00	sunny	12 °C	7 km/h
01:00	sunny	12 °C	6 km/h
02:00	sunny	12 °C	7 km/h
03:00	sunny	12 °C	5 km/h
04:00	sunny	12 °C	5 km/h
05:00	sunny	12 °C	5 km/h
06:00	sunny	11 °C	6 km/h
07:00	sunny	11 °C	6 km/h
08:00	sunny	12 °C	6 km/h
09:00	sunny	14 °C	1 km/h
10:00	sunny	14 °C	3 km/h
11:00	sunny	16 °C	3 km/h
12:00	sunny	17 °C	6 km/h
13:00	sunny	18 °C	7 km/h
14:00	sunny	19 °C	8 km/h
15:00	sunny	19 °C	9 km/h
16:00	sunny	19 °C	9 km/h
17:00	sunny	18 °C	7 km/h
18:00	sunny	16 °C	4 km/h
19:00	sunny	15 °C	3 km/h
20:00	sunny	14 °C	9 km/h
21:00	sunny	14 °C	8 km/h
22:00	sunny	14 °C	8 km/h
23:00	sunny	14 °C	6 km/h

Hourly forecast issued 27.09.2026 for Arosa (1741 m), Swiss local time, Open-Meteo model. The interactive block at the top of the page covers 16 days and refreshes every hour.

Arosa weather tomorrow

Tomorrow, Monday 28 Sep, in Arosa: partly cloudy, 13 to 20 °C, wind up to 9 km/h. No precipitation expected.

Arosa weekend weather

This weekend in Arosa: Saturday overcast, 7 to 17 °C; Sunday sunny, 11 to 19 °C.

Will it rain in Arosa this week?

Yes: 1 day with precipitation is expected in Arosa over the next 7 days, 8.1 mm in total. Wettest day: Thursday 1 Oct (8.1 mm).

The best day to go out in Arosa

The best day of the next 7 in Arosa: Sunday 27 Sep, sunny, up to 19 °C.

The last 7 days in Arosa

From 20 Sep to 26 Sep: 11.1 °C on average, 0 mm of precipitation. Warmest day: sunday 20 Sep (17 °C); coolest night: tuesday 22 Sep (6 °C).

Day	Min	Max
Sun 20 Sep	10 °C	17 °C
Mon 21 Sep	7 °C	14 °C
Tue 22 Sep	6 °C	12 °C
Wed 23 Sep	6 °C	15 °C
Thu 24 Sep	7 °C	14 °C
Fri 25 Sep	6 °C	15 °C
Sat 26 Sep	9 °C	17 °C

Open-Meteo analyses of the last 7 days (models and assimilated observations), MeteoSwiss 1991–2020 normals. Updated nightly.

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.

4.1 °CMean annual temperature

1182 mmPrecipitation per year

1684 hSunshine hours per year

158Frost days per year

1Summer days (≥ 25 °C)

JFMAMJJASOND

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.