Mountain·Switzerland

Weissmies

4,013m

Pennine Alps

Tiia Monto · CC BY 4.0 · Wikimedia Commons

Elevation: 4,013m
Prominence: 1,183m
Isolation: 11km
Relief: 2,484mabove the lowest point within 5 km
Steepest slope: 62°within 1 km of the summit
Snow at the summit: All yearSee month by month ↓
Summit: 46.1278°N, 8.0122°E

Mountain in the Pennine Alps

Weissmies is a mountain in the Pennine Alps (Switzerland). Its summit stands 4,013 m above sea level. Its prominence — how far it rises above the highest saddle linking it to a taller summit — is 1,183 m, and the nearest higher ground is 11 km away.

From the lowest point within 5 km (1,529 m), it rises 2,484 m. The steepest side is the north-east face: 44° on average over the first kilometre. In places the ground near the top reaches 62° — terrain for climbers, not walkers.

The nearest town is Saas-Grund, 6 km away at 1,564 m: 2,449 m below the summit.

Weissmies for skiers and climbers

Two scores out of 10, built only from open data — every part is shown. They describe what the mountain offers, not how safe it is.

Hiking & mountaineering

9.6/10

Difficulty to the top

Alpine climb

Most path sections around the top are T5 on the SAC hiking scale. Glaciers around the top.

Indicative only — never a safety assessment. Conditions change: ask local guides and check the forecast.

2.5/2.590 waymarked routes and 192 path sections nearby
1.5/1.59 huts and shelters
2.0/22,449 m of ascent from the valley
1.3/1.51,183 m of prominence
1.2/1.55 months with summit afternoons above −5 °C
1.0/1via ferratas, climbing and glaciers

Ski score

9.3/10

3.3/4110 km of downhill runs
1.5/1.561 ski lifts
1.5/1.51,545 m between the lowest and highest lift station
3.0/38 months of snow at about 2,332 m

Runs by difficulty

Easy 37 km
Intermediate 60 km
Difficult 4 km
Freeride 8 km

Snow season on the slopes (estimate)

Around 2,332 m, in the middle of the ski area: snow from November to June (some years from October to June).

Snow on the ground all month
Snow some of the time
No snow
This month

61 lifts · lift stations from 1,560 to 3,105 m · 13 km cross-country

How these scores are made

Ski (where OpenStreetMap has skiing within 12 km): up to 4 points for the length of downhill runs (300 km or more = 4), 1.5 for the number of lifts (40+), 1.5 for the vertical between lift stations (1,500 m) and 3 for the snow season — a month counts when the estimated mean temperature at the height of the ski area is −1 °C or lower and snow falls or lies there (NASA POWER, 2001–2020). Hiking & mountaineering: up to 2.5 for waymarked routes and paths, 1.5 for huts, 2 for the ascent from the valley (2,000 m), 1.5 for prominence (3,000 m), 1.5 for the season (months with summit afternoons above −5 °C) and 1 for via ferratas, climbing and glaciers. OpenStreetMap is built by volunteers: where few things are mapped, a score can be lower than reality.

Plan your visit

Stay, climb and get there

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Snow

When there is snow on Weissmies

At the summit, snow all year round. Month by month below, at different heights on the way up.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Summit4,013 msnow all year round	Snow on the ground all month	Snow on the ground all month	Snow on the ground all month	Snow on the ground all month	Snow on the ground all month	Snow on the ground all month	Snow on the ground all month	Snow on the ground all month	Snow on the ground all month	Snow on the ground all month	Snow on the ground all month	Snow on the ground all month
Halfway up2,788 msnow from October to July	Snow on the ground all month	Snow on the ground all month	Snow on the ground all month	Snow on the ground all month	Snow on the ground all month	Snow on the ground all month	Snow on the ground all month	No snow	No snow	Snow on the ground all month	Snow on the ground all month	Snow on the ground all month
Saas-Grund1,564 msnow from November to April	Snow on the ground all month	Snow on the ground all month	Snow on the ground all month	Snow on the ground all month	No snow	No snow	No snow	No snow	No snow	No snow	Snow on the ground all month	Snow on the ground all month

Snow on the ground all month
Snow some of the time
No snow
This month

Estimate for a normal year: average temperature and precipitation from NASA POWER, carried to each height, in a simple model of snow building up and melting. In a given year snow can come earlier or stay longer. It does not replace the local snow and avalanche bulletin.

Summit weather

Weissmies, month by month

Not a forecast: long-term averages (1991–2020), carried up to the summit. The orange line is where an average afternoon reaches 0 °C; above the dashed blue line it freezes even at dawn.

On an average July afternoon the summit reaches about 3 °C; on January nights it falls to about -27 °C. In 9 months of the year it stays below freezing at the top even in the afternoon. In July the 0 °C line climbs to about 4,510 m, above the summit: the top thaws on an average afternoon. Across the region, January is the driest month (55 mm) and May the wettest (143 mm).

0 °C on an average afternoon 0 °C at dawn the summit

Month	Summit high °C	Summit low °C	Saas-Grund high °C	0 °C line (m)	Rain & snow (mm)	Wet days	Sun h/day
January	-18	-27	-2	1,290	55	11	4.2
February	-17	-26	-1	1,430	56	10	5.5
March	-14	-22	2	1,940	72	12	6.4
April	-9	-16	7	2,680	101	15	5.9
May	-4	-12	12	3,430	143	19	5.7
June	1	-8	17	4,190	124	18	7.4
July	3	-6	19	4,510	113	17	7.9
August	3	-7	18	4,420	125	16	7.1
September	-1	-10	15	3,820	90	14	6.1
October	-6	-14	10	3,060	101	14	4.7
November	-12	-19	4	2,120	131	14	3.4
December	-17	-25	-1	1,450	71	12	3.5

Estimate: the NASA POWER climate of a ~55 km cell (average height 1,771 m), adjusted to the summit by −6.5 °C per 1,000 m. Rain, wet days and sunshine are those of the region. Mountain weather changes fast — always check a local forecast. ★ = mildest months at the top.

Relief

The mountain in profile

Two cuts through the summit, 16 km long, from the 30 m Copernicus elevation model. Heights drawn 2× taller than lengths, so the shape can be seen.

West – east

South – north

Steepness by direction

Average slope of the first kilometre from the summit. The orange petal is the steepest side.

Around the mountain

Huts, lifts and trails around Weissmies

Counted around the summit in OpenStreetMap, the map anyone can edit. The satellite plate shows 14 × 14 km.

A lift reaches Hohsaas at 3,105 m — just 908 m below the summit.

9mountain huts and shelters
Britanniahütte (3,030 m), Almagellerhütte (2,894 m), Berghütte Hohsaas (3,140 m), Weissmieshütte SAC (2,726 m) and 5 more
17cable cars, gondolas, chairlifts and rack railways
Morenia, Alpin Express I, Felskinn, Metro Alpin and 13 more
11ski areas
Saas Fee, Cheggio, Stomping Grounds (summer snowpark), Saas-Almagell and 7 more
90waymarked hiking routes
Simplon Fletschhorn Trekking, Vie Storiche Monte Moro Saas Almagell, Tour Monte Rosa tappa 6, C25 - Alpe Campolamana - Laghi dei Pozzoli - Lanche di Camasco and 86 more
11via ferratas
Via ferrata del Lago, Jägihorn-Klettersteig, Gabi Klettersteig, Zitterpartie Klettersteig and 7 more
11climbing crags and routes
Klettergarten Heimischgarten, Klettergarten Zur Kapelle, Klettergarten Feechi, Mini-Klettersteig Saas-Grund and 7 more
21named glaciers
Hohlaubgletscher, Wysstalgletscher, Laggingletscher, Bodmengletscher and 17 more
14viewpoints
Stromschnelle, panorama sui laghi di Antrona e Campliccioli, Wasserkopf/Bergbach, Wegweiser mit Abzweigung Alpinwanderweg and 10 more
6campsites
Stellplatz Saas-Fee, Schönblick, Bergheimat, Le Betulle and 2 more
93hotels, B&Bs and chalets
Fletschhorn, Hotel Gletschergarten, Monte Rosa, Pirmin Zurbriggen and 89 more
67restaurants and cafés

How hard are the paths?

192 path sections within 5 km, by SAC hiking scale (T1 easy walk … T6 difficult alpine).

T1T2T3T4T5T6

T1 hiking
T2 mountain hiking
T3 demanding mountain hiking
T4 alpine hiking
T5 demanding alpine hiking
T6 difficult alpine hiking

Towns at the foot

Saas-Grund6 km · 1,564 m
Saas-Fee7 km · 1,800 m
Antronapiana11 km · 902 m
Antrona Schieranco11 km · 907 m
Grächen15 km · 1,617 m
Stalden16 km · 777 m
Visperterminen17 km · 1,328 m
Sankt Niklaus17 km · 1,115 m

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OpenStreetMap is built by volunteers: a low number may just mean nobody has mapped it yet. Places © OpenStreetMap contributors (ODbL).

Photos

Seen by climbers and visitors

Fletschhorn summit — Franco Pecchio · CC BY 2.0

Fletschhorn, Lagginhorn and Weissmies (16579114338) — Björn S... · CC BY-SA 2.0

Recent years

How each month compared at the summit

Afternoon high at the summit (estimate). The first row is the reference, the 1991–2020 average in °C; the years show only the difference.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
1991–2020 average	-18	-17	-14	-9	-4	1	3	3	-1	-6	-12	-17
2020	+2.2	+2.1	−0.3	+1.7	+1.9	−1.4	+1.3	+1.0	+0.7	−1.9	+3.1	−0.9
2021	−1.4	+1.6	+0.3	−1.5	−1.9	+0.2	−0.5	+0.2	+1.0	−0.4	−0.1	+1.2
2022	+2.4	+3.1	+2.0	+1.4	+2.8	+2.5	+3.1	+1.7	−0.3	+3.7	+0.9	+0.5
2023	+0.3	+2.6	+3.8	+0.3	±0.0	+0.2	+1.3	+1.5	+2.5	+3.0	−0.4	+2.3
2024	+1.5	+3.4	+0.6	−0.6	−1.0	−0.6	+1.3	+2.4	−2.1	+0.8	+2.0	+2.5
2025	+1.7	+1.8	+1.5	+2.0	+1.0	+3.4	−0.2	+1.3	+0.2	+0.1	−0.2	+2.4

+1 warmer than usual −1 cooler than usual

Nearby

More mountains nearby

4,546 mDom

Switzerland12 km away

4,010 mLagginhorn

Switzerland3 km away

4,634 mDufourspitze

Switzerland24 km away

Switzerland15 km away

About these numbers

Names, elevation, prominence	Wikidata (Q30529) · CC0
Relief, 3D view, profiles	Copernicus DEM GLO-30 · © DLR e.V., © Airbus Defence and Space GmbH, Copernicus/ESA
Climate	NASA POWER, 1991–2020 · CC BY 4.0
Around the mountain	© OpenStreetMap contributors · ODbL
Images	EOX Sentinel-2 cloudless 2016 · CC BY 4.0; Wikimedia Commons

Every figure is an average, an estimate or a count from a public dataset. Licences and methods: data sources.

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