Heidelberg
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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.

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
*
* Data from: Mannheim, Germany (19 KM, 11 Miles).

Heidelberg Weather by Month

Pick a month to see the average temperature, rainfall and sunshine in Heidelberg - and find the best time to visit.

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 records 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
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

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.

  • Swimming
    4/10
  • Cycling
    4/10
  • Walking
    4/10
  • Camping
    4/10
  • Outdoor sports
    4/10

Heidelberg 3-Day Forecast

More climate data for Heidelberg

Popular in December

Where to go in December - average daytime high across popular destinations.

Bucket list

Need travel inspiration? Check out our bucket list articles and be inspired.