What is the weather in Grono today?

At the top of the page you will find the current temperature, precipitation and wind in Grono, updated in real time.

What is the 15-day forecast for Grono?

The "15-day forecast" section shows min/max temperatures, precipitation and wind expected for the next 15 days in Grono.

Will it rain tomorrow in Grono?

Check the 48-hour hourly forecast to see exactly when precipitation is expected in Grono.

What is the air quality in Grono?

The air quality section displays the AQI index and PM2.5, PM10 and ozone concentrations measured near Grono.

Are there weather alerts for Grono?

Weather alerts (storms, high winds, extreme temperatures) are shown as a banner at the top of the page when active.

At what altitude is Grono located?

Grono sits at around 1146 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 Grono?

The warmest month in Grono is July, averaging 16.8 °C (1991–2020 normal). The coldest is January at −1.9 °C.

How much does it rain in Grono per year?

Grono receives about 1686 mm of precipitation a year. The wettest month is August (200 mm), the driest February (60 mm).

When is the best time to visit Grono?

For warmth and sunshine: July (16.8 °C on average, — h of sun). The coldest month is January (−1.9 °C). Check the 15-day forecast above for your dates.

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Home › Graubünden › Grono

Weather in Grono

Graubünden, 1146 m · continuously updated

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

Riale di Roggiasca: 10.7 °C at Roveredo, Bacino di compenso river temperature · FOEN gauge 3.6 km away · 27.09. 00h

Temperature · last 4 and next 28 hours

Grono weather: the next 24 hours

Updated hourly.

Grono weather hour by hour (48 h)

Grono 15-day forecast

Two-week trend.

Grono 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 Grono

Neighbouring municipalities, as the crow flies.

Cama3 km Castaneda4 km Roveredo (GR)4 km Santa Maria in Calanca6 km Buseno8 km Arbedo-Castione8 km San Vittore8 km Lostallo9 km

7-day forecast for Grono

Today (Sunday 27 Sep) in Grono: fog, 11 to 17 °C, precipitation 0.0 mm (0 %), wind up to 6 km/h. Tomorrow: fog, 12 to 18 °C.

Day	Weather	Min	Max	Precip.	Wind
Today	fog	11 °C	17 °C	0.0 mm	6 km/h
Tomorrow	fog	12 °C	18 °C	0.0 mm	5 km/h
Tue 29 Sep	overcast	11 °C	17 °C	0.0 mm	8 km/h
Wed 30 Sep	light rain	12 °C	14 °C	0.0 mm	7 km/h
Thu 1 Oct	light rain	11 °C	13 °C	4.2 mm	4 km/h
Fri 2 Oct	showers	12 °C	17 °C	1.2 mm	7 km/h
Sat 3 Oct	fog	11 °C	17 °C	0.0 mm	7 km/h

Forecast updated on 27.09.2026 at 04:37 (Open-Meteo model, elevation 1146 m). The interactive block at the top refreshes hourly and covers 16 days.

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

Hourly weather in Grono

Sunday 27 Sep in Grono, hour by hour: sunny in the morning, mostly sunny in the afternoon, mostly sunny in the evening. Low 11 °C around 07:00, high 17 °C around 15:00. No rainy hour.

Show the 24-hour table

Time	Weather	Temp.	Wind
00:00	sunny	12 °C	4 km/h
01:00	sunny	12 °C	2 km/h
02:00	sunny	12 °C	3 km/h
03:00	sunny	12 °C	3 km/h
04:00	sunny	12 °C	2 km/h
05:00	sunny	11 °C	3 km/h
06:00	sunny	11 °C	4 km/h
07:00	sunny	11 °C	5 km/h
08:00	sunny	11 °C	5 km/h
09:00	sunny	14 °C	1 km/h
10:00	sunny	15 °C	3 km/h
11:00	sunny	15 °C	4 km/h
12:00	mostly sunny	16 °C	5 km/h
13:00	mostly sunny	16 °C	6 km/h
14:00	mostly sunny	17 °C	5 km/h
15:00	mostly sunny	17 °C	5 km/h
16:00	mostly sunny	17 °C	4 km/h
17:00	mostly sunny	17 °C	3 km/h
18:00	mostly sunny	16 °C	2 km/h
19:00	fog	15 °C	1 km/h
20:00	fog	14 °C	4 km/h
21:00	mostly sunny	14 °C	7 km/h
22:00	mostly sunny	14 °C	4 km/h
23:00	mostly sunny	14 °C	4 km/h

Hourly forecast issued 27.09.2026 for Grono (1146 m), Swiss local time, Open-Meteo model. The interactive block at the top of the page covers 16 days and refreshes every hour.

Grono weather tomorrow

Tomorrow, Monday 28 Sep, in Grono: fog, 12 to 18 °C, wind up to 5 km/h. No precipitation expected.

Grono weekend weather

This weekend in Grono: Saturday fog, 11 to 17 °C; Sunday fog, 11 to 17 °C.

Will it rain in Grono this week?

Yes: 2 days with precipitation are expected in Grono over the next 7 days, 5.4 mm in total. Wettest day: Thursday 1 Oct (4.2 mm).

The best day to go out in Grono

The best day of the next 7 in Grono: Tuesday 29 Sep, overcast, up to 17 °C.

The last 7 days in Grono

From 20 Sep to 26 Sep: 14.8 °C on average, 0 mm of precipitation. Warmest day: monday 21 Sep (21 °C); coolest night: wednesday 23 Sep (10 °C).

Day	Min	Max
Sun 20 Sep	13 °C	20 °C
Mon 21 Sep	15 °C	21 °C
Tue 22 Sep	12 °C	18 °C
Wed 23 Sep	10 °C	15 °C
Thu 24 Sep	12 °C	19 °C
Fri 25 Sep	10 °C	15 °C
Sat 26 Sep	11 °C	16 °C

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

Climate of Grono: 1991–2020 normals

In Grono (1146 m), the mean annual temperature is 7.5 °C. The warmest month is July (16.8 °C on average) and the coldest January (−1.9 °C). About 1686 mm of precipitation falls per year, peaking in August (200 mm) with a minimum in February (60 mm). The mean monthly maximum reaches 28.0 °C and the absolute minimum −9.0 °C.

7.5 °CMean annual temperature

1686 mmPrecipitation per year

JFMAMJJASOND

Mean monthly precipitation (mm) — bar height relative to the wettest month.

Month	Mean T	Abs. max	Abs. min	Precip. (mm)
Jan	−1.9 °C	10.2 °C	−9.0 °C	72
Feb	−0.1 °C	12.4 °C	−8.5 °C	60
Mar	4.2 °C	17.8 °C	−5.7 °C	77
Apr	7.6 °C	20.5 °C	−2.8 °C	131
May	11.2 °C	24.0 °C	1.5 °C	175
Jun	14.9 °C	27.2 °C	5.1 °C	190
Jul	16.8 °C	28.0 °C	7.0 °C	177
Aug	16.5 °C	27.9 °C	6.9 °C	200
Sep	12.3 °C	23.5 °C	3.2 °C	171
Oct	7.6 °C	19.3 °C	−1.3 °C	166
Nov	2.5 °C	13.6 °C	−5.6 °C	181
Dec	−1.6 °C	9.6 °C	−8.9 °C	87
Year	7.5 °C	28.0 °C	−9.0 °C	1686

Source: MeteoSwiss open data (1991–2020 normals) — stations Grono (3 km, 324 m), Magadino / Cadenazzo (21 km, 203 m), S. Bernardino (26 km, 1639 m), adjusted to the elevation of Grono (1146 m) using a 0.55 °C/100 m lapse rate. Indicative, rounded values.