Heidelberg Weather
Heidelberg weather today, the 14-day forecast, and average temperature, rain and what to wear for every month — compared against Hong Kong. Best months to visit: Apr, May, Jun, Jul, Aug, Sep and Oct.
Heidelberg current weather
Heidelberg now (local time 13:45)
21°C
Overcast
- Feels like
- 21°
- Humidity
- 63%
- Wind
- 5 km/h
Next 7 days · what to wear
8° – 24°C
Rain likely on 2 of 7 days
👕 Long sleeves with a light jacket or sweater; big day–night swing, so dress in layers.
Heidelberg 14-day forecast
Today
10/4
🌦️
22°
10°
💧10%
Mon
10/5
🌫️
22°
10°
💧0%
Tue
10/6
🌫️
22°
9°
💧0%
Wed
10/7
🌫️
24°
11°
💧37%
Thu
10/8
🌦️
18°
11°
💧89%
Fri
10/9
☁️
13°
8°
💧43%
Sat
10/10
🌦️
13°
9°
💧55%
Sun
10/11
🌦️
15°
6°
💧49%
Mon
10/12
☁️
18°
9°
💧39%
Tue
10/13
🌧️
17°
16°
💧24%
Wed
10/14
🌦️
16°
13°
💧31%
Thu
10/15
🌦️
12°
7°
💧24%
Fri
10/16
🌦️
10°
5°
💧25%
Sat
10/17
🌦️
8°
2°
💧23%
Best time to visit Heidelberg
On temperature and rainfall, the most comfortable months in Heidelberg are Apr, May, Jun, Jul, Aug, Sep and Oct. The hottest month is July (average high 27°C) and the coldest is January (average low -2°C).
Heidelberg climate by month
| Month | Avg high | Avg low | Rain | Humidity | vs Hong Kong |
|---|---|---|---|---|---|
| Jan | 4°C | -2°C | 64 mm | 93% | -16°C |
| Feb | 6°C | -2°C | 52 mm | 89% | -16°C |
| Mar | 10°C | 1°C | 54 mm | 84% | -14°C |
| AprBest | 16°C | 5°C | 44 mm | 77% | -13°C |
| MayBest | 20°C | 9°C | 75 mm | 74% | -12°C |
| JunBest | 25°C | 13°C | 62 mm | 69% | -9°C |
| JulBest | 27°C | 15°C | 70 mm | 63% | -8°C |
| AugBest | 27°C | 15°C | 71 mm | 65% | -8°C |
| SepBest | 22°C | 10°C | 50 mm | 71% | -12°C |
| OctBest | 16°C | 6°C | 61 mm | 83% | -15°C |
| Nov | 9°C | 3°C | 63 mm | 91% | -17°C |
| Dec | 5°C | -1°C | 72 mm | 93% | -16°C |
Data: NASA POWER 2001–2020 climatology (MERRA-2, elevation-corrected); Hong Kong comparison uses HKO 1991–2020 normals.
Heidelberg weather month by month: what to wear
Heidelberg in OctoberBest monthThis month
October in Heidelberg is chilly: average highs of 16°C and lows of 6°C, around 61 mm of rain (mostly dry) and 83% humidity — about 15°C colder than Hong Kong. It's one of the most comfortable months of the year to visit.
👕 Long sleeves with a light jacket or sweater; big day–night swing, so dress in layers.
Heidelberg in November
November in Heidelberg is cold: average highs of 9°C and lows of 3°C, around 63 mm of rain (mostly dry) and 91% humidity — about 17°C colder than Hong Kong.
👕 A warm coat over a sweater, plus a scarf.
Heidelberg in December
December in Heidelberg is cold: average highs of 5°C and lows of -1°C, around 72 mm of rain (mostly dry) and 93% humidity — about 16°C colder than Hong Kong.
👕 A down jacket, thermal base layers, scarf and gloves.
Heidelberg in January
January in Heidelberg is cold: average highs of 4°C and lows of -2°C, around 64 mm of rain (mostly dry) and 93% humidity — about 16°C colder than Hong Kong.
👕 A down jacket, thermal base layers, scarf and gloves.
Heidelberg in February
February in Heidelberg is cold: average highs of 6°C and lows of -2°C, around 52 mm of rain (mostly dry) and 89% humidity — about 16°C colder than Hong Kong.
👕 A warm coat over a sweater, plus a scarf.
Heidelberg in March
March in Heidelberg is chilly: average highs of 10°C and lows of 1°C, around 54 mm of rain (mostly dry) and 84% humidity — about 14°C colder than Hong Kong.
👕 A sweater plus a coat or windbreaker; big day–night swing, so dress in layers.
Heidelberg in AprilBest month
April in Heidelberg is mild and cool: average highs of 16°C and lows of 5°C, around 44 mm of rain (mostly dry) and 77% humidity — about 13°C colder than Hong Kong. It's one of the most comfortable months of the year to visit.
👕 Long sleeves with a light jacket or sweater; big day–night swing, so dress in layers.
Heidelberg in MayBest month
May in Heidelberg is mild and cool: average highs of 20°C and lows of 9°C, around 75 mm of rain (mostly dry) and 74% humidity — about 12°C colder than Hong Kong. It's one of the most comfortable months of the year to visit.
👕 Short sleeves with a light long-sleeve or jacket for cool mornings and evenings; big day–night swing, so dress in layers.
Heidelberg in JuneBest month
June in Heidelberg is pleasantly warm: average highs of 25°C and lows of 13°C, around 62 mm of rain (mostly dry) and 69% humidity — about 9°C colder than Hong Kong. It's one of the most comfortable months of the year to visit.
👕 Short sleeves with a light long-sleeve or jacket for cool mornings and evenings; big day–night swing, so dress in layers.
Heidelberg in JulyBest month
July in Heidelberg is warm to hot: average highs of 27°C and lows of 15°C, around 70 mm of rain (mostly dry) and 63% humidity — about 8°C colder than Hong Kong. It's one of the most comfortable months of the year to visit.
👕 Short sleeves, plus a light layer for air-conditioned interiors; big day–night swing, so dress in layers.
Heidelberg in AugustBest month
August in Heidelberg is warm to hot: average highs of 27°C and lows of 15°C, around 71 mm of rain (mostly dry) and 65% humidity — about 8°C colder than Hong Kong. It's one of the most comfortable months of the year to visit.
👕 Short sleeves, plus a light layer for air-conditioned interiors; big day–night swing, so dress in layers.
Heidelberg in SeptemberBest month
September in Heidelberg is pleasantly warm: average highs of 22°C and lows of 10°C, around 50 mm of rain (mostly dry) and 71% humidity — about 12°C colder than Hong Kong. It's one of the most comfortable months of the year to visit.
👕 Short sleeves with a light long-sleeve or jacket for cool mornings and evenings; big day–night swing, so dress in layers.
FAQ
›What is the best time to visit Heidelberg?
On temperature and rainfall, the most comfortable months in Heidelberg are Apr, May, Jun, Jul, Aug, Sep and Oct. The hottest month is July (average high 27°C) and the coldest is January (average low -2°C).
›What's the weather like in Heidelberg in October, and what should I wear?
October in Heidelberg is chilly: average highs of 16°C and lows of 6°C, around 61 mm of rain (mostly dry) and 83% humidity — about 15°C colder than Hong Kong. It's one of the most comfortable months of the year to visit. What to wear: Long sleeves with a light jacket or sweater; big day–night swing, so dress in layers.
›What's the weather like in Heidelberg in November, and what should I wear?
November in Heidelberg is cold: average highs of 9°C and lows of 3°C, around 63 mm of rain (mostly dry) and 91% humidity — about 17°C colder than Hong Kong. What to wear: A warm coat over a sweater, plus a scarf.
›When is the rainy season in Heidelberg?
Heidelberg is wettest in May, with about 75 mm on average, and driest in April, with about 44 mm.
›How cold does Heidelberg get? Does it snow?
The coldest month is January, averaging 4°C by day and -2°C at night. Nights regularly drop below freezing and snow is possible.
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Forecast data: Open-Meteo.com (CC BY 4.0), refreshed every 3 hours. Hottest month: July; coldest: January.