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Grimentz Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Grimentz.
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Climate overview of Grimentz
Temperatures in Grimentz, Canton of Valais, Switzerland, vary greatly throughout the year. July is the hottest month at 17°C (63°F), while January is the coldest at -5°C (23°F).
Rain/snowfall is high, totalling around 1464 mm (58 in) per year. May is the wettest month and March the driest. The city also experiences mild summers and very cold winters. Sunshine peaks in July, when the city sees around 9.0 hours of sunshine per day.
Grimentz Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Grimentz - and find the best time to visit.
Monthly Temperature in Grimentz
The climate in Grimentz is known for significant temperature differences throughout the year, making the weather dynamic. Average maximum daytime temperatures range from a moderate 17°C (63°F) in July, the warmest time of the year, to a very cold -5°C (23°F) during cooler months like January.
At night, you can expect temperatures ranging from 7°C (45°F) in July to around -14°C (7°F) during January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Grimentz
Grimentz has a notably wet climate with abundant precipitation, recording 1464 mm (58 in) of rain/snowfall per year. Year-round, Grimentz has a balanced climate with minimal variation in precipitation. The difference between the wettest month, May, with 145 mm (5.7 in), and the driest month, March, with 103 mm (4.1 in), is minimal. For more details, please visit our Grimentz Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Grimentz
Seasonal changes in sunshine hours are quite dramatic in Grimentz. While July receives considerable daily sunshine with up to 9.0 hours, December marks the darkest time of the year, where sunshine is scarce with only 2.3 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Data from: Sion, Switzerland (19 KM, 11 Miles).
Daily hours of sunshine
Data from: Sion, Switzerland (19 KM, 11 Miles).
Daily percentage of sunshine
Data from: Sion, Switzerland (19 KM, 11 Miles).
Humidity in Grimentz by Month
The relative humidity is high throughout the year in Grimentz.
The city experiences its highest humidity in December, reaching 83%. In April, the humidity drops to its lowest level at 59%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Data from: Sion, Switzerland (19 KM, 11 Miles).
Wind Speed in Grimentz
The average wind speed over the year ranges from 1 m/s (2 knots) to 2 m/s (4 knots). It is lower in January, October, November and December and higher in February, March, April, May, June, July, August and September. What does this mean?
The mean monthly wind speed over the year (meters per second)
Data from: Sion, Switzerland (19 KM, 11 Miles).
Best Time to Visit Grimentz
The most favourable weather available in Grimentz usually occurs in June, July and August. Conditions are generally most challenging in January, February, March, April, May, September, October, November and December.
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
Jan
very cold
Feb
very cold
Mar
cold
Apr
wet
May
wet
Jun
mixed
Jul
mixed
Aug
mixed
Sep
wet
Oct
wet
Nov
cold
Dec
very cold
- Best overall: June, July and August
- Warmest weather: July and August
- Most sunshine: July
- Seasonal pattern: Mild summers and very cold winters
- Coldest conditions: January, with freezing nights around -14°C (7°F).
Frequently asked questions about the climate in Grimentz
What is the best time to visit Grimentz?
June, July and August typically offer the most optimal weather in Grimentz. In contrast, January, February, March, April, May, September, October, November and December tend to have less optimal conditions. Grimentz has mild summers and very cold winters.
What temperatures can I expect in Grimentz?
Daytime highs range from -5°C (23°F) in January to 17°C (63°F) in July. Nighttime lows range from -14°C (7°F) to 7°C (45°F). Temperatures vary considerably through the year.
How much rain does Grimentz get?
Annual rainfall is around 1464 mm (58 in). May is the wettest month with 145 mm (5.7 in), while March is the driest with 103 mm (4.1 in).
How sunny is Grimentz?
Grimentz receives around 2,171 hours of sunshine per year. July is the sunniest month with 270 hours, while December is the cloudiest with just 70 hours. Overall, Grimentz enjoys abundant sunshine.
Grimentz 3-Day Forecast
Grimentz on the map
Grimentz is highlighted - select any city to see its climate.
Popular in October
Where to go in October - average daytime high across popular destinations.
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