SeasonMapHeidelberg weather in December
Germany
December in Heidelberg: cold, a little rain, with clean air — a fair time to visit.
#11 of 12 months in Heidelberg · #1124 of 1383 destinations to visit in December · comfort 51/100 (tier D)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Heidelberg in December
Other months in Heidelberg
Germany's forum calls June genuinely variable — anywhere from hot and humid around 30-35°C to chilly and rainy at 15-20°C in the same month. Regulars' standard packing list covers both: summer clothes plus a hooded rain jacket and a warm sweater, since Heidelberg's Neckar valley runs a touch milder than much of the rest of the country but not immune to the swings.
Add your own note from Heidelberg's card on the map.
Heidelberg climate normals — December
| Daytime high | 7°C / 44°F | 🧥 cold |
|---|---|---|
| Nighttime low | 2°C / 35°F | |
| Feels like (high) | 3°C / 37°F | |
| Rainfall | 77 mm / 3 in | 🌦 some rain |
| Rainy days | 13 days | |
| Humidity | 87% | 💦 very humid |
| Dew point | 3°C / 37°F | |
| Sunshine | 3.2 h/day | |
| Daylight | 8.3 h | |
| Wind | 16 km/h / 10 mph | |
| Snowfall | 4.8 cm / 1.9 in | |
| Air quality (US AQI) | 37 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Heidelberg in December
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Peak crowdsChristmas market, Christmas holidays in Germany, school holidays in 6 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Heidelberg's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Toughest weatherHeidelberg's best weather comes in June, August and September — separate windows, not one continuous season.
Best weatherFair weatherToughest weather
What's on in Heidelberg in December
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Festival
Christmas market
23 Nov – 22 DecChristmas & New YearCrowdedSix linked squares down the Hauptstrasse with a rink under the castle, which spreads the crowd better than most German markets of this size. It shuts before Christmas Eve. Source ↗
Nearby, and something's on
Within 300 km of Heidelberg — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Heidelberg?
Heidelberg in December — FAQ
- Is December a good time to visit Heidelberg?
- December in Heidelberg: cold, a little rain, with clean air — a fair time to visit. It ranks #11 of 12 months for Heidelberg on SeasonMap's comfort score (51/100).
- What is the weather like in Heidelberg in December?
- In December, Heidelberg averages a daily high of 6.9°C and a low of 1.8°C, with about 77.4 mm of rain over roughly 12.8 rainy days.
- What is the air quality in Heidelberg in December?
- Heidelberg has a mean US Air Quality Index of about 37 in December.
- Does it snow in Heidelberg in December?
- Heidelberg sees roughly 4.8 cm of snowfall in December.
Other months in Heidelberg
Compare Heidelberg in December
Warmer or cooler than Heidelberg in December
Similar destinations in Central Europe — December
Within 300 km: Strasbourg's Christkindelsmarik around 27 Nov – 27 Dec, and Nuremberg's Christkindlesmarkt on 27 Nov – 24 Dec.