Grimsel Pass
The Grimsel Pass is a mountain pass at 2164 m (Bern, Valais). Access: road; usually open juin–octobre. The weather above is computed at the exact pass altitude; the “Snow, wind and freezing level” section gives 7-day snowfall, gusts and the snow line — check it before crossing by car, motorbike or bike.
Climate of Grimsel Pass: 1991–2020 normals
In Grimsel Pass (2164 m), the mean annual temperature is 1.3 °C. The warmest month is August (9.5 °C on average) and the coldest February (−6.2 °C). About 1952 mm of precipitation falls per year, peaking in January (195 mm) with a minimum in July (135 mm). The sun shines for about 1435 hours a year, mostly in July (178 h). On average there are 189 frost days per year. The mean monthly maximum reaches 20.0 °C and the absolute minimum −17.3 °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 | −5.8 °C | 3.6 °C | −16.9 °C | 195 | 72 | 30 | 0 |
| Feb | −6.2 °C | 4.3 °C | −17.3 °C | 171 | 95 | 28 | 0 |
| Mar | −3.7 °C | 6.4 °C | −14.7 °C | 181 | 129 | 29 | 0 |
| Apr | −0.8 °C | 8.9 °C | −11.1 °C | 162 | 123 | 22 | 0 |
| May | 3.4 °C | 14.3 °C | −5.9 °C | 170 | 135 | 10 | 0 |
| Jun | 7.3 °C | 19.0 °C | −2.1 °C | 136 | 158 | 3 | 0 |
| Jul | 9.3 °C | 20.0 °C | 0.5 °C | 135 | 178 | 1 | 0 |
| Aug | 9.5 °C | 20.0 °C | −0.1 °C | 150 | 169 | 1 | 0 |
| Sep | 6.0 °C | 16.0 °C | −2.9 °C | 142 | 140 | 5 | 0 |
| Oct | 3.0 °C | 13.7 °C | −6.7 °C | 141 | 115 | 10 | 0 |
| Nov | −1.8 °C | 8.6 °C | −11.8 °C | 178 | 64 | 21 | 0 |
| Dec | −4.8 °C | 4.7 °C | −15.6 °C | 190 | 57 | 29 | 0 |
| Year | 1.3 °C | 20.0 °C | −17.3 °C | 1952 | 1435 | 189 | 0 |
Source: MeteoSwiss open data (1991–2020 normals) — stations Grimsel Hospiz (1 km, 1980 m), Ulrichen (7 km, 1346 m), Robièi (19 km, 1898 m), adjusted to the elevation of Grimsel Pass (2164 m) using a 0.55 °C/100 m lapse rate. Indicative, rounded values.
Passes & summits
- Weather Rhone Glacier (4 km · 2300 m)
- Weather Furka Pass (6 km · 2429 m)
- Weather Nufenen Pass (10 km · 2478 m)
- Weather Gotthard Pass (17 km · 2106 m)
- Weather Susten Pass (20 km · 2224 m)
- Weather Grosse Scheidegg (21 km · 1962 m)
Nearby municipalities
- Weather Guttannen (6 km)
- Weather Goms (10 km)
- Weather Realp (10 km)
- Weather Obergoms (13 km)
- Weather Bedretto (14 km)
- Weather Innertkirchen (16 km)
- Weather Hospental (18 km)
- Weather Göschenen (18 km)
Passes & summits Weather Guttannen
Frequently asked questions about the weather: Grimsel Pass
Is the Grimsel Pass open?
The Grimsel Pass is usually accessible juin–octobre. The official status depends on snow and roadworks (check TCS or the canton); the snow forecast above helps anticipate closures.
How cold is it at the Grimsel Pass?
Expect about 10 °C less than in the lowlands (mean lapse rate 0.6 °C per 100 m). The mean annual temperature at 2164 m is about 1.3 °C; the coldest month is February (−6.2 °C).
Can it snow at the Grimsel Pass in summer?
Yes: above 2000 m, snow can fall in any season during cold spells. Watch the freezing level and the forecast snowfall in the dedicated section.
What is the warmest month in Grimsel Pass?
The warmest month in Grimsel Pass is August, averaging 9.5 °C (1991–2020 normal). The coldest is February at −6.2 °C.
How much does it rain in Grimsel Pass per year?
Grimsel Pass receives about 1952 mm of precipitation a year. The wettest month is January (195 mm), the driest July (135 mm).
When is the best time to visit Grimsel Pass?
For warmth and sunshine: August (9.5 °C on average, 169 h of sun). The coldest month is February (−6.2 °C). Check the 15-day forecast above for your dates.