Travel guide

Dolomites weather and seasons

In the mountains the weather is part of the planning. Knowing how forecasts work, what each season offers and which sources to trust turns a hike or a ski day into a safe, well-timed outing. For a detailed month-by-month overview, see our guide on when to visit the Dolomites.

Mountain weather changes fast

In the Dolomites conditions can shift in a matter of hours. The temperature drops by roughly 6 °C every 1000 metres of ascent, so a mild morning in the valley can mean a cold, windy summit. In summer the clear morning sky often turns to heat thunderstorms in the afternoon: the ground warms, humid air rises and builds towering clouds that release sudden, sometimes violent storms with lightning, hail and a fast drop in temperature.

The practical answer is layering and timing. Dress in layers you can add or shed, and always pack a warm mid-layer, a windproof and waterproof shell and a rain cover even on a sunny day. Start high-altitude hikes early so you can be back down, or at a hut, before the typical afternoon build-up. Check the forecast the evening before and again in the morning, and be ready to turn back if the sky changes.

The official forecast services to trust

The Dolomites span three provinces, each with its own official weather service, and these are the references to rely on rather than generic apps. Meteotrentino, run by the Civil Protection of the Autonomous Province of Trento, covers Trentino with daily bulletins, hourly precipitation, föhn and wind forecasts and the avalanche bulletin. The weather service of the Autonomous Province of Bolzano/Südtirol covers South Tyrol with mountain forecasts, station data and avalanche reports, published in Italian, German, Ladin and English. ARPAV, the Veneto environmental agency, runs the "Dolomiti Meteo" forecasts from its weather centre in Arabba, with the bulletin issued in the early afternoon and updated later in the day and the following morning.

Webcams: the honest reality check

A forecast tells you what should happen; a live webcam tells you what is happening right now. Almost every valley, pass and ski area in the Dolomites publishes live cameras, and they are the quickest way to see real cloud cover, fresh snow and visibility before you set off. Look at both a valley webcam and a summit or mid-station one: the valley may be clear while the peaks are wrapped in cloud, or the reverse. Good places to start are the Dolomiti Superski webcam portal (hundreds of cameras across the linked ski areas), the South Tyrol and provincial tourism sites, and high-resolution platforms such as foto-webcam.eu and Roundshot. Cross-check the camera time stamp so you are not reading an old image.

The seasons in depth

Summer (mid-June to September) is the season of trails, via ferratas and open huts, with long days but also the most reliable afternoon thunderstorms. Autumn (late September to October) is the foliage season: the larches turn from green to intense gold, the air is often clearer and the enrosadira — the pink-orange glow on the rock walls at sunset — is at its most striking. Winter (roughly December to April) is for skiing, snowshoeing and the Dolomiti Superski circuit, with consistent snow usually from November in the high terrain. Spring is the quietest shoulder season: the snow melts in the valleys but high routes are still snow-bound and many huts are shut. See the month-by-month guide →

Season	Indicative period	What to expect
Summer	Mid-June – September	Open huts, trails and ferratas; afternoon storms
Autumn	Late September – October	Golden larches, clear air, enrosadira; first snow up high
Winter	December – April	Skiing and snowshoeing; check the avalanche bulletin
Spring	May – early June	Quiet shoulder season; high routes still snowy

Reading the weather signs in the mountains

Forecasts are essential, but the sky around you gives real-time clues. Towering cumulus clouds growing tall and dark on a summer afternoon are the classic sign of an approaching thunderstorm — a cue to head down. A sudden warm, dry, gusty wind with an unusually clear, deep-blue sky is often the föhn, which descends the leeward slopes of the Alps, sweeps away cloud and can lift the temperature by several degrees in minutes; it brings fine but very windy days and accelerates snowmelt. Fog and low cloud can form fast in valleys and on cols, cutting visibility — if you cannot see your route, it is rarely worth pushing on. And remember the lapse rate: it is normal for it to feel much colder, and to blow much harder, at the top than at the trailhead.

Winter: snow and the avalanche bulletin

In winter the forecast is only half the picture: you must also read the avalanche bulletin. AINEVA, the inter-regional snow and avalanche association, and the provincial services issue daily bulletins using the European avalanche danger scale, which has five levels — 1 low, 2 moderate, 3 considerable, 4 high, 5 very high. The scale is not linear: level 3 considerable already indicates a serious situation in which many accidents happen, not a "medium" risk. Before any off-piste or ski-touring outing, read the bulletin, understand which slopes and aspects are dangerous, and carry — and know how to use — transceiver, probe and shovel. Read our mountain safety guide →

Level	European scale
1	Low
2	Moderate
3	Considerable
4	High
5	Very high

Practical checklist before you set off

A quick routine keeps you safe and saves a ruined day. Check the official provincial forecast the evening before and again in the morning; glance at a valley and a summit webcam to see the real conditions; in winter, read the avalanche bulletin and the snow report. Plan to start early and have a turn-back time, especially in summer. Pack layers — a warm mid-layer and a windproof, waterproof shell — plus sun protection, water and a head torch, even on a clear day. Tell someone your route and expected return. If the sky builds into towering storm clouds, or fog closes in, change the plan: the mountain will still be there tomorrow.

Frequently asked questions about Dolomites weather

What is the best website for Dolomites weather?

It is best to rely on the official weather services of the three provinces: Meteotrentino for Trentino, the weather service of the Autonomous Province of Bolzano for South Tyrol and ARPAV (with its weather centre in Arabba) for the Veneto. For snow and avalanches, the reference is AINEVA and the provincial avalanche bulletins.

Is it true there are thunderstorms in the afternoon in summer?

Yes, in summer a fine morning often gives way to heat thunderstorms in the afternoon. That is why high-altitude hikes should start early, so you can return or reach a hut before the showers arrive. On exposed ridges and summits a thunderstorm with lightning is a serious danger.

How much does the temperature drop with altitude?

On average the temperature falls by about 6 °C for every 1000 metres of elevation gain. At 2500 m it can feel cold even in midsummer, especially with wind or in the shade: always carry a warm layer and a windproof shell. In winter, in the coldest months, valley-bottom lows can drop well below zero.

When does it snow in the Dolomites?

It varies from year to year and depends greatly on altitude. The first flakes at high elevations can appear as early as September or October, but consistent snowfall usually begins in November and snow can last into April. For up-to-date figures check the snow bulletins of the provincial services and the ski-area webcams.

Where and when can I see the golden larches (foliage)?

The larch foliage turns the Dolomites golden-yellow between late September and October, with the peak roughly in mid-autumn. Classic spots are the Alpe di Siusi, the Val di Funes and the woods around the passes. In autumn the air is often clearer and the enrosadira, the pink-orange sunset glow on the walls, is especially intense.

What is the föhn?

The föhn is a warm, dry wind that descends the leeward slopes of the Alps: it sweeps away cloud and humidity, leaves the sky crystal-clear and can raise the temperature by several degrees in a short time. It often brings glorious but very windy days, and it speeds up snowmelt.