The best time to visit Colmar is May, June and September. These months land in the comfortable band — June averages a high of 24.4 °C, September a high of 21.5 °C with just 10 rain days, the driest showing of the year — giving warm, bright days for strolling La Petite Venise without the summer rush. July and August are peak season, with school-holiday crowds and higher prices across Alsace. Winter is the quiet low season, cold and damp but transformed by Colmar's famous Christmas markets.
Best months MayJuneSeptember
Colmar month by month
Average highs and lows (°C), 2016–2025. Highlighted bars are the best months.
| Month | High | Low | Rain days | Sunshine | Days ≥30 °C | Crowds |
|---|---|---|---|---|---|---|
| January | 5.8 °C | -0.3 °C | 14 | ●●●●● | – | ●●●●● |
| February | 8.8 °C | 1.1 °C | 11 | ●●●●● | – | ●●●●● |
| March | 11.9 °C | 2.7 °C | 12 | ●●●●● | – | ●●●●● |
| April | 15.5 °C | 5.6 °C | 12 | ●●●●● | – | ●●●●● |
| May | 19.2 °C | 9.6 °C | 14 | ●●●●● | – | ●●●●● |
| June | 24.4 °C | 14.5 °C | 13 | ●●●●● | 2 | ●●●●● |
| July | 25.7 °C | 15.5 °C | 12 | ●●●●● | 4 | ●●●●● |
| August | 25.8 °C | 15.5 °C | 11 | ●●●●● | 5 | ●●●●● |
| September | 21.5 °C | 12.1 °C | 10 | ●●●●● | – | ●●●●● |
| October | 16.5 °C | 8.3 °C | 11 | ●●●●● | – | ●●●●● |
| November | 9.6 °C | 3.3 °C | 13 | ●●●●● | – | ●●●●● |
| December | 6.8 °C | 1.1 °C | 13 | ●●●●● | – | ●●●●● |
How the months are picked.A month qualifies when its average high sits in the comfortable 20–28 °C band (scored down towards 9 °C and 37 °C), rain days are few and sunshine hours are high — at least 78 % of the city's best-scoring month. July and August are then set aside as peak season (school-holiday crowds and prices) whenever at least three other months qualify; where summer is the only comfortable window they stay. Figures are ten-year averages (2016-01-01 to 2025-12-31) from ERA5 reanalysis data via Open-Meteo (CC BY 4.0) for the city centre coordinates. Sunshine is shown relative to the city's own year (modelled data overstates absolute hours).Heat and sea: days with a high of 30 °C or more are averaged over 2016–2025 (ERA5).Crowds:Relative to an average month in the same region (Eurostat nights spent at tourist accommodation, by NUTS 2 region and month) — a measure of season, not of how crowded one city is compared with another. Busiest month August, quietest January; NUTS 2 region FRF1, 2022–2025, Eurostat.
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When to go, and what to expect
Spring (Mar–May)
Ideal for gardens, canals and café terraces as the town comes alive.
Summer (Jun–Aug)
June is the sweet spot; July and August suit those who don't mind busy lanes.
Autumn (Sep–Nov)
September is one of the year's best months — mild, dry and festive with harvest season.
Winter (Dec–Feb)
Worth it only for the Christmas markets; otherwise grey and chilly.
Notable events
- Late November to December
- Colmar Christmas Markets (Marchés de Noël)
- August
- Alsace Wine Festival (Foire aux Vins d'Alsace)
- July
- Festival International de Colmar (classical music)
- September to October
- Wine harvest season in the surrounding vineyards
Frequently asked
Is Colmar too hot in August?
No — August highs average 25.8 °C, warm but comfortable. The bigger issue is crowds and prices during the school holidays rather than the heat.
What is the rainiest month in Colmar?
January and May both see 14 rain days, the most of the year. September is the driest with just 10 rain days.
Is winter worth visiting Colmar?
Mainly for the Christmas markets in late November and December. Expect cold days around 6.8 °C in December, the least sunny month, so pack warm layers.
Know when to go? Now decide where to stay — our Colmar area guide →
Areas of Colmar
Best time to visit near here
Sources
- Open-Meteo historical weather API — monthly climate normals, 2016–2025 (CC BY 4.0)
- ERA5 reanalysis (ECMWF / Copernicus) — the underlying temperature, precipitation and sunshine data
- ReasonStay methodology — how the best months are computed and checked
An independent guide to Colmar — honest, verified, no invented data. Climate figures: ERA5 via Open-Meteo, 2016–2025 averages; the best months are computed from them, not opinion.