Simplon Pass
The Simplon Pass is a mountain pass at 2005 m (Valais). Access: road; usually open toute l'année. 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 Simplon Pass: 1991–2020 normals
In Simplon Pass (2005 m), the mean annual temperature is 3.0 °C. The warmest month is July (12.0 °C on average) and the coldest January (−5.6 °C). About 727 mm of precipitation falls per year, peaking in May (75 mm) with a minimum in February (43 mm). The mean monthly maximum reaches 24.1 °C and the absolute minimum −16.5 °C.
Mean monthly precipitation (mm) — bar height relative to the wettest month.
| Month | Mean T | Abs. max | Abs. min | Precip. (mm) |
|---|---|---|---|---|
| Jan | −5.6 °C | 5.0 °C | −16.5 °C | 61 |
| Feb | −4.8 °C | 7.4 °C | −15.8 °C | 43 |
| Mar | −1.2 °C | 11.1 °C | −12.8 °C | 49 |
| Apr | 2.3 °C | 14.0 °C | −9.3 °C | 52 |
| May | 6.3 °C | 18.6 °C | −5.0 °C | 75 |
| Jun | 10.2 °C | 23.2 °C | −1.0 °C | 61 |
| Jul | 12.0 °C | 24.1 °C | 1.4 °C | 62 |
| Aug | 11.7 °C | 23.8 °C | 0.7 °C | 67 |
| Sep | 7.8 °C | 19.6 °C | −3.0 °C | 48 |
| Oct | 3.8 °C | 15.5 °C | −7.0 °C | 66 |
| Nov | −1.5 °C | 10.5 °C | −12.5 °C | 72 |
| Dec | −4.9 °C | 5.7 °C | −15.6 °C | 71 |
| Year | 3.0 °C | 24.1 °C | −16.5 °C | 727 |
Source: MeteoSwiss open data (1991–2020 normals) — stations Visp (16 km, 639 m), Grächen (16 km, 1605 m), Eggishorn (20 km, 2892 m), adjusted to the elevation of Simplon Pass (2005 m) using a 0.55 °C/100 m lapse rate. Indicative, rounded values.
Passes & summits
- Weather Bettmerhorn (18 km · 2872 m)
- Weather Eggishorn (20 km · 2927 m)
- Weather Aletsch Glacier (22 km · 2300 m)
- Weather Mittelallalin (23 km · 3500 m)
- Weather Jungfraujoch (33 km · 3454 m)
- Weather Gornergrat (35 km · 3089 m)
Nearby municipalities
- Weather Simplon (6 km)
- Weather Zwischbergen (6 km)
- Weather Brig-Glis (8 km)
- Weather Ried-Brig (8 km)
- Weather Termen (8 km)
- Weather Naters (8 km)
- Weather Riederalp (11 km)
- Weather Mörel-Filet (11 km)
Passes & summits Weather Simplon
Frequently asked questions about the weather: Simplon Pass
Is the Simplon Pass open?
The Simplon Pass is usually accessible toute l'année. 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 Simplon Pass?
Expect about 9 °C less than in the lowlands (mean lapse rate 0.6 °C per 100 m). The mean annual temperature at 2005 m is about 3.0 °C; the coldest month is January (−5.6 °C).
Can it snow at the Simplon 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 Simplon Pass?
The warmest month in Simplon Pass is July, averaging 12.0 °C (1991–2020 normal). The coldest is January at −5.6 °C.
How much does it rain in Simplon Pass per year?
Simplon Pass receives about 727 mm of precipitation a year. The wettest month is May (75 mm), the driest February (43 mm).
When is the best time to visit Simplon Pass?
For warmth and sunshine: July (12.0 °C on average, — h of sun). The coldest month is January (−5.6 °C). Check the 15-day forecast above for your dates.