City in Baden-Württemberg, Germany
Heidelberg weather by month and the best time to visit
When to go to Heidelberg
Apr–Jun and Sep–Oct for mild weather and fewer crowds; Dec brings Christmas markets. July–August are busy and hot; winters are grey.
Heidelberg weather by month
Average daily high, rainfall and conditions.
- Jan4°64 mm
- Feb6°52 mm
- Mar10°54 mm
- Apr16°44 mm
- May20°75 mm
- Jun25°62 mm
- Jul27°70 mm
- Aug27°71 mm
- Sep22°50 mm
- Oct16°61 mm
- Nov9°63 mm
- Dec5°72 mm
Monthly averages
| Month | High | Low | Rain | Humidity | Conditions |
|---|---|---|---|---|---|
| January | 4°C39°F | -2°C29°F | 64 mm | 93% | Cold |
| February | 6°C42°F | -2°C29°F | 52 mm | 89% | Cold |
| March | 10°C51°F | 1°C34°F | 54 mm | 84% | Cold |
| April | 16°C61°F | 5°C41°F | 44 mm | 77% | Cool |
| May | 20°C68°F | 9°C49°F | 75 mm | 74% | Pleasant |
| June | 25°C77°F | 13°C56°F | 62 mm | 69% | Pleasant |
| July | 27°C81°F | 16°C60°F | 70 mm | 63% | Pleasant |
| August | 27°C80°F | 15°C59°F | 71 mm | 65% | Pleasant |
| September | 22°C71°F | 10°C51°F | 50 mm | 71% | Pleasant |
| October | 16°C60°F | 6°C43°F | 61 mm | 83% | Cool |
| November | 9°C48°F | 2°C36°F | 63 mm | 91% | Cold |
| December | 5°C40°F | -1°C31°F | 72 mm | 93% | Cold |
Best months across Germany
| Place | Best months | Warmest month |
|---|---|---|
| Berlin | May–Sep | Jul (26°C) |
| Munich | May–Sep | Jul (24°C) |
| Hamburg | May–Sep | Jul (23°C) |
| Frankfurt | May–Sep | Jul (27°C) |
| Cologne | May–Sep | Jul (25°C) |
| Dresden | May–Sep | Jul (26°C) |
| Heidelberg | Apr–Jun, Sep–Oct | Jul (27°C) |
| Düsseldorf | May–Sep | Jul (25°C) |
| Leipzig | May–Sep | Jul (26°C) |
| Stuttgart | Apr–Jun, Sep–Oct | Jul (26°C) |
| Nuremberg | May–Sep | Jul (26°C) |
| Black Forest | May–Jun, Sep–Oct | Jul (25°C) |
| Freiburg | May–Oct | Jul (25°C) |
| Rothenburg ob der Tauber | Apr–Jun, Sep–Oct | Jul (25°C) |
| Garmisch-Partenkirchen | Jun–Sep, Dec–Feb | Jul (24°C) |
| Bremen | May–Sep | Jul (23°C) |
Quick answers
What is the best month to visit Heidelberg?
Apr–Jun, Sep–Oct. Apr–Jun and Sep–Oct for mild weather and fewer crowds; Dec brings Christmas markets. July–August are busy and hot; winters are grey.
When is the rainy season in Heidelberg?
Rain peaks in May with about 75 mm. No month averages 150 mm or more.
What is the hottest month in Heidelberg?
July, with average highs of 27°C (81°F).
How cold does Heidelberg get?
The coolest nights are in January, averaging -2°C (29°F).
More about Heidelberg
Going to Heidelberg solo?
SoloSquare is where travelers, nomads and locals in Heidelberg meet up for small plans: coffee, dinners, walks and day trips. Join one, or start your own in a minute.
Sources
- NASA POWER climatology (2001–2020)
- RNV Heidelberg transport
- Heidelberg Marketing
- Universitätsklinikum Heidelberg
Climate averages are modelled from NASA POWER (MERRA-2) for 2001–2020 at about 50 km resolution, so coasts and valleys can differ a little. Temperatures are adjusted by 0.8°C for the city's elevation. Compiled and reviewed by SoloSquare. How we compile and score this. Spotted something out of date? Tell us.