Monthly climate guide
Heidelberg weather in August
August in Heidelberg is typically warm, with average daytime highs around 26°C (80°F) and night-time lows near 15°C (58°F). The month usually brings about 66 mm of rain (some rain) and is often cloudy. Daytime highs are about the same as July and 5°C warmer than September.
What stands out in August
- Temperatures are falling — expect highs around 4°C lower by September.
- Heidelberg is usually about 2°C warmer than Koblenz, 130 km away, in August.
- Seasonally, August counts as late summer in Heidelberg.
- It's one of the sunniest months here, with cloud cover around 63%.
August is typically Heidelberg's warmest month.
Avg high
26°C
80°F
Avg low
15°C
58°F
Rainfall
66 mm
some rain
Humidity
64%
relative
Sky
63%
cloud · often cloudy
Heidelberg weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 4°C / 39°F | -1°C / 29°F | 69 mm | 93% | 82% |
| February | 5°C / 42°F | -2°C / 29°F | 44 mm | 89% | 75% |
| March | 11°C / 51°F | 1°C / 33°F | 42 mm | 83% | 64% |
| April | 16°C / 60°F | 4°C / 40°F | 41 mm | 76% | 63% |
| May | 19°C / 67°F | 8°C / 47°F | 70 mm | 73% | 68% |
| June | 24°C / 75°F | 13°C / 55°F | 69 mm | 69% | 68% |
| July | 26°C / 79°F | 15°C / 58°F | 71 mm | 63% | 64% |
| August | 26°C / 80°F | 15°C / 58°F | 66 mm | 64% | 63% |
| September | 22°C / 71°F | 10°C / 51°F | 49 mm | 70% | 61% |
| October | 16°C / 60°F | 6°C / 44°F | 58 mm | 82% | 72% |
| November | 9°C / 48°F | 2°C / 36°F | 57 mm | 90% | 79% |
| December | 5°C / 42°F | 0°C / 32°F | 78 mm | 94% | 83% |
What to pack for August
- T-shirts plus a light layer for the evening
- Comfortable trainers or sandals for long walks
- An extra layer — evenings are noticeably cooler than afternoons
- A small travel umbrella, just in case
Is August a good time to visit Heidelberg?
Compare the months in the chart above to find your ideal window.
Best time to visit Heidelberg →Other Germany cities in August
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Heidelberg weather in August. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/germany/heidelberg/august
<a href="https://weathercompare.eu/weather/germany/heidelberg/august">Heidelberg weather in August</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/germany/heidelberg" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Heidelberg weather in August"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/germany/heidelberg/august">Heidelberg weather in August</a> – WeatherCompare</p>
Heidelberg in August: quick answers
Is August a good time to visit Heidelberg?
August is a reasonable time for Heidelberg: highs around 26°C and about 66 mm of rain, though not one of the three best months.
How warm is Heidelberg in August?
Average highs are about 26°C (80°F) and average lows about 15°C (58°F), based on 10 years of daily data.
Does it rain a lot in Heidelberg in August?
Heidelberg typically gets around 66 mm of rain in August — some rain.
Figures are long-term averages for the area around Heidelberg (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.