Open Travel Guide
Weather in Geneva

Geneva Weather & Climate Guide 2026

When to visit Geneva: real monthly data on temperature, rain, and crowds — not vibes.

Weather through the year in Geneva

5° JAN 7° FEB 12° MAR 16° APR 20° MAY 24° JUN 27° JUL 26° AUG 21° SEP 15° OCT 9° NOV 5° DEC

Best time Shoulder Worth avoiding

Average daytime temperature in °C. Figures are for Geneva.

Geneva is a cosmopolitan French-speaking city at the southwestern tip of Lake Geneva, framed by the Alps and the Jura. Known for the Jet d'Eau, a compact medieval Old Town, Calvin's Reformation, the Red Cross and the United Nations, it is also a world capital of watchmaking, banking and science with CERN on its doorstep. Despite its high prices, Geneva rewards visitors with lake swimming, museums, fondue and easy day trips to France and the Alps.

Geneva has a temperate, oceanic-continental climate with four distinct seasons. Summers are warm and mostly dry with highs of 25-30 degrees C, winters are cool and often grey with highs of 3-7 degrees C, and rain falls fairly evenly all year (about 1,000 mm). The lake moderates extremes, while the bise, a dry northeast wind, brings cold snaps and clear skies.

Best time to visit

Recommendation

Best: Year-round

Avoid: None

Month-by-month weather

Typical conditions throughout the year.

January

5°C / 41°F high, 0°C / 32°F low

Cold, grey and sometimes foggy; the bise can make it feel colder. Alpine skiing is nearby, hotels are cheap and sights are quiet.

February

7°C / 45°F high, 1°C / 34°F low

Still cold but with increasing sunshine; school holiday weeks bring ski traffic.

March

12°C / 54°F high, 3°C / 37°F low

Early spring with mixed sun and showers; parks begin to bloom.

April

16°C / 61°F high, 6°C / 43°F low

Pleasant and fresh with cherry blossom and increasing lake activity.

May

20°C / 68°F high, 10°C / 50°F low

Warm, green and bright; terraces open and lake boats run fully.

June

24°C / 75°F high, 14°C / 57°F low

Warm, long days and the start of lake swimming.

July

27°C / 81°F high, 16°C / 61°F low

Hot and sunny with occasional thunderstorms; the lake is at its warmest (about 22 degrees C).

August

26°C / 79°F high, 16°C / 61°F low

Hot, mostly dry and busy; Swiss National Day on 1 August features fireworks over the lake.

September

21°C / 70°F high, 12°C / 54°F low

Mild, bright days with warm lake water and harvest festivals in the Genevois vineyards.

October

15°C / 59°F high, 8°C / 46°F low

Cool and colourful, with autumn leaves in Parc des Eaux-Vives and Jura hills.

November

9°C / 48°F high, 4°C / 39°F low

Damp and foggy with short days; indoor attractions are best.

December

5°C / 41°F high, 1°C / 34°F low

Cold and festive with Christmas markets, lights and the Escalade celebrations.

The seasons

What to expect in each part of the year.

Season

Spring

Months: Mar-May

Highs rise from 12 to 20 degrees C with blossoming parks, fewer crowds and occasional showers. The lake is still cold and mountain snow lingers on the Salève.

Season

Summer

Months: Jun-Aug

Warm to hot (24-28 degrees C, with heat waves above 33 degrees C), long evenings and lake swimming. Thunderstorms are possible on hot afternoons.

Season

Fall

Months: Sep-Nov

September is mild and sunny (21 degrees C), October brings colour in the vineyards and Jura, and November is damp with low cloud and fog.

Season

Winter

Months: Dec-Feb

Cold (highs 4-7 degrees C, lows around 0 degrees C), often grey with lake fog, snow occasionally; skiing is 1 hour away in the Alps.

Crowds & peak times

When to expect tourists and when to avoid them.

High Season
Jul-Aug and during Watches & Wonders (April): busiest and most expensive; lake terraces and trains are crowded.
Shoulder Season
May-June and Sep-Oct: ideal weather, manageable crowds and moderate prices.
Low Season
Nov-Mar (except the Christmas and ski holidays): cheapest hotel rates, short days and many museums quiet.

Major events & festivals

Time your visit around what matters.

Event

Escalade

Geneva's most beloved festival marks the defeat of the Savoyard attack of 1602 with a costumed historical parade, torchlit processions and chocolate cauldrons (marmites) in the Old Town.

Event

Fêtes de Genève

The city's historic summer lakeside festival with concerts, funfair rides and fireworks over the harbour.

Event

Watches & Wonders Geneva

The luxury watch fair at Palexpo, mostly trade-only with public-friendly events around the city; hotel prices peak.

Event

Geneva Lake Parade

Techno street parade along the lake that attracts tens of thousands of dancers; check current status and dates.

Event

Fête de la Musique

Free concerts across the city's squares over a weekend in June.

Event

Bol d'Or Mirabaud

The world's largest inland-lake sailing regatta, with hundreds of boats between Geneva and Le Bouveret.

Event

Geneva Marathon for UNICEF

Road race along the lake and through the Old Town, also with half-marathon, 10 km and children's races.

Event

Swiss National Day

Lakeside fireworks and bonfires celebrate Switzerland's national day.

Event

Geneva Christmas Markets

Festive stalls, mulled wine and cheese raclette in the lakeside quarters and Old Town, plus an ice rink and Christmas lights.

Event

Jeûne genevois

A traditional Geneva fast day and public holiday, when many shops close, traditionally celebrated with plum tart.