SeasonMapHeidelberg weather in August
Germany
August in Heidelberg: hot, a little rain — an excellent time to visit.
#3 of 12 months in Heidelberg · #364 of 1383 destinations to visit in August · comfort 87/100 (tier A)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Heidelberg in August
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 — August
| Daytime high | 28°C / 82°F | 🥵 hot |
|---|---|---|
| Nighttime low | 16°C / 60°F | |
| Feels like (high) | 29°C / 84°F | |
| Rainfall | 57 mm / 2.3 in | 🌦 some rain |
| Rainy days | 9 days | |
| Humidity | 66% | 💧 humid |
| Dew point | 14°C / 57°F | |
| Sunshine | 10.8 h/day | |
| Daylight | 14.4 h | |
| Wind | 13 km/h / 8 mph | |
| Air quality (US AQI) | 51 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Heidelberg in August
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.
BusySummer 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).
Best 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 August — FAQ
- Is August a good time to visit Heidelberg?
- August in Heidelberg: hot, a little rain — an excellent time to visit. It ranks #3 of 12 months for Heidelberg on SeasonMap's comfort score (87/100).
- What is the weather like in Heidelberg in August?
- In August, Heidelberg averages a daily high of 27.6°C and a low of 15.7°C, with about 57.4 mm of rain over roughly 8.7 rainy days.
- What is the air quality in Heidelberg in August?
- Heidelberg has a mean US Air Quality Index of about 51 in August.
Other months in Heidelberg
Compare Heidelberg in August
Warmer or cooler than Heidelberg in August
Similar destinations in Central Europe — August
Within 300 km: Frankfurt's Museumsuferfest on 28–30 Aug, and Strasbourg's Storks on the nests around 15 Feb – 31 Aug.