Best months
May, June, and September
Warmest month
July, 28°C
Wettest month
May, 67 mm
Heidelberg weather by month
Average daily high and low, total rainfall and days with at least 2.5 mm of rain.
| Month | High / low | Rain | Verdict |
|---|---|---|---|
| January | 6°C / 0°C | 50 mm · 7 days | Cold |
| February | 8°C / 1°C | 41 mm · 5 days | Cold |
| March | 13°C / 2°C | 41 mm · 5 days | Fair |
| April | 18°C / 6°C | 38 mm · 5 days | Good |
| May | 22°C / 10°C | 67 mm · 7 days | Great |
| June | 26°C / 14°C | 64 mm · 7 days | Great |
| July | 28°C / 16°C | 61 mm · 6 days | Fair |
| August | 27°C / 15°C | 62 mm · 7 days | Great |
| September | 22°C / 11°C | 54 mm · 5 days | Great |
| October | 17°C / 7°C | 58 mm · 6 days | Fair |
| November | 10°C / 4°C | 54 mm · 6 days | Cold |
| December | 7°C / 1°C | 58 mm · 7 days | Cold |
Heidelberg by season
Spring
Spring sees the city awakening with blooming flowers in the castle gardens and along the Philosophers' Walk. Temperatures are mild, perfect for hiking.
- + Fewer crowds than summer
- + Beautiful blossoms, especially cherry trees
- + Pleasant weather for walking
- − Unpredictable rain showers
- − Some outdoor attractions/beer gardens not fully open until late April
Summer
Warm, sunny days with long evenings. The city is vibrant, with outdoor cafes, river activities, and festivals in full swing.
- + All attractions, boat tours, and beer gardens open
- + Lively atmosphere and long daylight hours
- + Perfect for swimming in the Neckar
- − Peak tourist crowds, especially in July/August
- − Accommodation prices at their highest
Autumn
Arguably the most picturesque season, with the surrounding forests turning brilliant shades of gold and red. A crisp, romantic atmosphere descends.
- + Stunning fall foliage, especially from the castle
- + Fewer crowds after September
- + Harvest festivals and new wine season ('Federweisser')
- − Days get shorter and cooler rapidly
- − Increased chance of rain and fog
Winter
Cold and often gray, but magical during the Christmas Market (Adventszeit). The castle can look especially dramatic under a dusting of snow.
- + Magical Christmas Market from late Nov to Dec 23
- + Lowest tourist numbers (except Christmas)
- + Cozy atmosphere in traditional pubs
- − Some attractions have reduced hours or close
- − Short daylight hours (dark by 4:30 PM)
Heidelberg month by month
Heidelberg in January
ColdIn January, Heidelberg averages highs of 6°C and lows of 0°C, with about 7 rainy days and 50 mm of rain. It is cold, so pack warm layers.
Heidelberg in February
ColdIn February, Heidelberg averages highs of 8°C and lows of 1°C, with about 5 rainy days and 41 mm of rain. It is cold, so pack warm layers.
Heidelberg in March
FairIn March, Heidelberg averages highs of 13°C and lows of 2°C, with about 5 rainy days and 41 mm of rain. Expect mixed weather, with comfortable spells.
Heidelberg in April
GoodIn April, Heidelberg averages highs of 18°C and lows of 6°C, with about 5 rainy days and 38 mm of rain. It is a good month to visit.
Heidelberg in May
GreatIn May, Heidelberg averages highs of 22°C and lows of 10°C, with about 7 rainy days and 67 mm of rain. It is one of the most comfortable months for sightseeing.
Heidelberg in June
GreatIn June, Heidelberg averages highs of 26°C and lows of 14°C, with about 7 rainy days and 64 mm of rain. It is one of the most comfortable months for sightseeing.
Heidelberg in July
FairIn July, Heidelberg averages highs of 28°C and lows of 16°C, with about 6 rainy days and 61 mm of rain. Expect mixed weather, with comfortable spells.
Heidelberg in August
GreatIn August, Heidelberg averages highs of 27°C and lows of 15°C, with about 7 rainy days and 62 mm of rain. It is one of the most comfortable months for sightseeing.
Heidelberg in September
GreatIn September, Heidelberg averages highs of 22°C and lows of 11°C, with about 5 rainy days and 54 mm of rain. It is one of the most comfortable months for sightseeing.
Heidelberg in October
FairIn October, Heidelberg averages highs of 17°C and lows of 7°C, with about 6 rainy days and 58 mm of rain. Expect mixed weather, with comfortable spells.
Heidelberg in November
ColdIn November, Heidelberg averages highs of 10°C and lows of 4°C, with about 6 rainy days and 54 mm of rain. It is cold, so pack warm layers.
Heidelberg in December
ColdIn December, Heidelberg averages highs of 7°C and lows of 1°C, with about 7 rainy days and 58 mm of rain. It is cold, so pack warm layers.
Top tours and experiences in Heidelberg
The tours and tickets travellers book most, with ratings and reviews from Viator.
Tour through Heidelberg in the footsteps of the night watchmen
4.9112 reviews1h 30m
from €16
Check availability
All things to do in Heidelberg →
Tours and prices from Viator, a Tripadvisor company. Prices change with your dates. We may earn a commission if you book, at no extra cost to you.
Plan your Heidelberg trip
Best time to visit Heidelberg: FAQ
What is the best month to visit Heidelberg?+
September is the most comfortable month on average, with highs of 22°C. May and June are close behind.
What is the rainiest month in Heidelberg?+
May is the wettest month, with about 67 mm of rain.
How hot does Heidelberg get?+
July is the warmest month, with average highs of 28°C and lows of 16°C. The coldest nights come in January, averaging 0°C.
Averages for 2006–2025 from the WAGHAUSEL-KIRRLACH weather station (20 km from the centre), NOAA Global Historical Climatology Network. Verdicts rate sightseeing comfort from daytime highs and rainy days.