Heidelberg Weather in December
Thinking of visiting Heidelberg in December? Expect low temperatures reaching 6°C (43°F) during the day, dropping to 1°C (34°F) at night, and be prepared for the wettest month of the year.
Rainfall in Heidelberg in December
This month is known for heavy rainfall, so don't forget your umbrella to stay dry. Expect around 15 days of rain based on historical data, with 95 mm (3.7 in) average. A fairly balanced picture this month, some wet days but nothing too extreme in terms of intensity.
Temperature in Heidelberg in December
December in Heidelberg brings low temperatures, with highs of 6°C (43°F) and nights around 1°C (34°F). December is part of winter. It stays cool throughout the day, so warm layers are a good idea from morning to evening. Nights drop to 1°C (34°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet.
Sunshine in Heidelberg in December
This month is characterized by fewer sunny days, with about 45 hours of sunshine. It's great for those who appreciate cooler, less sunny days.December in Heidelberg can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, our weather planner can help you explore other options in the world.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Germany, check out our Heidelberg's climate page.
Heidelberg Temperature in December
Min Temperature
1°C (34°F)
Max Temperature
6°C (43°F)
Chance of Rain
51%
Precipitation
95 mm (3.7 in)
Rainy days
15 days
Sunshine
45 hours *
Percentage Sunshine
*
Daily Historical Temperatures
47-year average (1976-2025)
Based on our historical records, temperatures in Heidelberg typically stay consistent throughout December, with daily highs averaging around 6°C (43°F). Nights are cold, with lows typically ranging from 0°C (32°F) to 2°C (36°F).
Average temperatures in December
Historical weather for Heidelberg in December
Browse day-by-day weather records for Heidelberg spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Heidelberg historical weather extremes in December
Based on 20 years of weather observations (2005-2025), these are the most extreme conditions recorded in Heidelberg.
- The warmest day in December was on December 31, 2022, with a maximum of 18°C (64°F).
Best Places in Germany in December
Find out more about the weather in Germany and which places have the best travel conditions in this month. See all of Germany in December →
perfect weather
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tolerable
unpleasant
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What to Wear in Heidelberg in December
Dress warmly and in layers for your trip to Heidelberg in December. A good base layer system works wonders. Start with good thermal underwear, add something warm like a fleece sweater, then finish with a waterproof jacket on top. Expect heavy rainfall, so bring good rain protection and waterproof bags. Sunglasses aren't essential this month, though you might want them for the occasional bright moment.What To Do in Heidelberg in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Germany, check out our Heidelberg's climate page.
See the full Heidelberg climate overview or explore weather in Germany.
