SeasonMapHeidelberg weather in May
Germany
May in Heidelberg: nice, a little rain, with clean air — an excellent time to visit.
#4 of 12 months in Heidelberg · #380 of 1383 destinations to visit in May · comfort 86/100 (tier A)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Heidelberg in May
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 — May
| Daytime high | 22°C / 71°F | 😎 nice |
|---|---|---|
| Nighttime low | 10°C / 49°F | |
| Feels like (high) | 20°C / 68°F | |
| Rainfall | 78 mm / 3.1 in | 🌦 some rain |
| Rainy days | 10 days | |
| Humidity | 69% | 💧 humid |
| Dew point | 8°C / 47°F | |
| Sunshine | 11.1 h/day | |
| Daylight | 15.4 h | |
| Wind | 14 km/h / 9 mph | |
| Air quality (US AQI) | 48 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Heidelberg in May
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.
BusyWhitsun/Pentecost holidays in Germany, school holidays in 3 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).
Fair weatherHeidelberg's best weather comes in June, August and September — separate windows, not one continuous season.
Best weatherFair weatherToughest weather
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 May — FAQ
- Is May a good time to visit Heidelberg?
- May in Heidelberg: nice, a little rain, with clean air — an excellent time to visit. It ranks #4 of 12 months for Heidelberg on SeasonMap's comfort score (86/100).
- What is the weather like in Heidelberg in May?
- In May, Heidelberg averages a daily high of 21.5°C and a low of 9.7°C, with about 78 mm of rain over roughly 9.8 rainy days.
- What is the air quality in Heidelberg in May?
- Heidelberg has a mean US Air Quality Index of about 48 in May.
Other months in Heidelberg
Compare Heidelberg in May
Warmer or cooler than Heidelberg in May
Similar destinations in Central Europe — May
Within 300 km: Strasbourg's Storks on the nests around 15 Feb – 31 Aug, and Luxembourg's Octave pilgrimage and Maertchen around 20 Apr – 25 May.