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Heidelberg Weather in May
May in Heidelberg averages 20°C (68°F) during the day and 10°C (50°F) at night. Quite a bit of rainfall is typical this month, with around 80 mm (3.1 in) on average. An umbrella is a good idea.
Rainfall in Heidelberg in May
Records from the past 30 years suggest around 16 days of rain, with 80 mm (3.1 in) average for the month. This is a month with many wet days but modest rainfall totals, so showers are generally light and easy to manage.
Temperature in Heidelberg in May
The excellent temperature in Heidelberg in May makes it a solid month to visit, with 20°C (68°F) during the day and 10°C (50°F) at night. Even when the weather is stable, mornings and evenings can still feel distinctly cool. With lows around 10°C (50°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.
Sunshine in Heidelberg in May
The month enjoys around 217 hours of sunshine, creating mostly sunny days with good weather conditions.If you're a fan of comfortable temperatures and drier conditions, May is a great time to visit.
Heidelberg Temperature in May
Min Temperature
10°C (50°F)
Max Temperature
20°C (68°F)
Chance of Rain
54%
Precipitation
80 mm (3.1 in)
Rainy days
16 days
Sunshine
217 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
49-year average (1976-2025)
Based on our historical records, temperatures in Heidelberg typically rise from around 18°C (64°F) at the start of May to approximately 22°C (72°F) by the end. Nights are cool, with lows typically ranging from 8°C (46°F) to 12°C (54°F).
Average temperatures in May
Historical weather records for Heidelberg in May
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 May
Based on weather observations in Heidelberg between 2005 and 2026, these are the recorded extremes during May.
- Heidelberg recorded its highest May temperature of 33°C (91°F) on May 28, 2005.
- On May 6, 2010, Heidelberg saw its coldest May day with temperatures maxing out at 8°C (46°F).
- The coldest night in May in Heidelberg was on May 12, 2020, with a minimum of 1°C (34°F).
Best Places in Germany in May
Find out more about the weather in Germany and which places have the best travel conditions in this month. See all of Germany in May →
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 May
For Heidelberg in May, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. High rain levels are expected, so pack waterproof gear and an umbrella or poncho. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.
What To Do in Heidelberg in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling9/10 -
Walking9/10 -
Barbeque8/10 -
Camping4/10 -
Outdoor sports9/10
Heidelberg 3-Day Forecast
More climate data for Heidelberg
See the full Heidelberg climate overview or explore weather in Germany.
Popular in May
Where to go in May - average daytime high across popular destinations.
Berlin
20°C (68°F) Düsseldorf20°C (68°F) Hanover19°C (66°F) Munich
20°C (68°F) Cologne20°C (68°F) Hamburg19°C (66°F) Winterberg17°C (63°F) Binz
14°C (57°F) Bucket list
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