Heilbronn, Baden-Wurttemberg Weather by Month and Climate Averages

How much rain does Heilbronn get?

Heilbronn gets 802 mm of precipitation in an average year, spread over about 160 days with measurable rain. That is fewer rainy days than 72% of Germany.

July is the wettest month, with 84 mm. April is the driest, with 47 mm. December has the most rainy days, about 17.

The longest dry spell in the last five years lasted 22 days, to June 7, 2023.

Heilbronn weather by month

Heilbronn weather in January

In January, Heilbronn averages a high of 5°C and a low of -1°C. It gets 58 mm of precipitation over about 15 rainy days. The sun is out about 23% of daylight hours. The January record high is 18°C (2023) and the record low is -16°C (2009).

Heilbronn weather in February

In February, Heilbronn averages a high of 6°C and a low of -1°C. It gets 54 mm of precipitation over about 14 rainy days. The sun is out about 30% of daylight hours. The February record high is 21°C (2021) and the record low is -17°C (2012).

Heilbronn weather in March

In March, Heilbronn averages a high of 11°C and a low of 1°C. It gets 62 mm of precipitation over about 13 rainy days. The sun is out about 40% of daylight hours. The March record high is 26°C (2021) and the record low is -17°C (2005).

Heilbronn weather in April

In April, Heilbronn averages a high of 17°C and a low of 5°C. It gets 47 mm of precipitation over about 12 rainy days. The sun is out about 41% of daylight hours. The April record high is 31°C (2012) and the record low is -4°C (2013). April is one of the most comfortable months to visit.

Heilbronn weather in May

In May, Heilbronn averages a high of 21°C and a low of 9°C. It gets 78 mm of precipitation over about 13 rainy days. The sun is out about 38% of daylight hours. The May record high is 33°C (2017) and the record low is -2°C (2011). May is one of the most comfortable months to visit.

Heilbronn weather in June

In June, Heilbronn averages a high of 24°C and a low of 12°C. It gets 76 mm of precipitation over about 12 rainy days. The sun is out about 42% of daylight hours. The June record high is 39°C (2026) and the record low is 3°C (2006). June is one of the most comfortable months to visit.

Heilbronn weather in July

In July, Heilbronn averages a high of 27°C and a low of 14°C. It gets 84 mm of precipitation over about 13 rainy days. The sun is out about 43% of daylight hours. The July record high is 39°C (2026) and the record low is 6°C (2019).

Heilbronn weather in August

In August, Heilbronn averages a high of 26°C and a low of 13°C. It gets 73 mm of precipitation over about 12 rainy days. The sun is out about 43% of daylight hours. The August record high is 39°C (2015) and the record low is 6°C (2007). August is one of the most comfortable months to visit.

Heilbronn weather in September

In September, Heilbronn averages a high of 22°C and a low of 10°C. It gets 61 mm of precipitation over about 11 rainy days. The sun is out about 44% of daylight hours. The September record high is 33°C (2016) and the record low is 1°C (2018). September is one of the most comfortable months to visit.

Heilbronn weather in October

In October, Heilbronn averages a high of 16°C and a low of 6°C. It gets 70 mm of precipitation over about 13 rainy days. The sun is out about 27% of daylight hours. The October record high is 29°C (2023) and the record low is -6°C (2012).

Heilbronn weather in November

In November, Heilbronn averages a high of 9°C and a low of 3°C. It gets 64 mm of precipitation over about 14 rainy days. The sun is out about 24% of daylight hours. The November record high is 22°C (2020) and the record low is -11°C (2025).

Heilbronn weather in December

In December, Heilbronn averages a high of 6°C and a low of 0°C. It gets 75 mm of precipitation over about 17 rainy days. The sun is out about 18% of daylight hours. The December record high is 19°C (2022) and the record low is -17°C (2009).

Sunshine, humidity and wind in Heilbronn

September is the sunniest month in Heilbronn, with sunshine about 44% of daylight hours. December is the cloudiest, at 18%. Over the year the sun shines about 34% of daylight hours. Heilbronn is sunnier than 86% of Germany.

Humidity peaks in December at 88% and is lowest in July at 61%.

Heilbronn has about 10 days a year above 32°C. Heilbronn is hotter than 99% of Germany.

First and last freeze in Heilbronn

The first fall freeze in Heilbronn typically comes around November 2, and the last spring freeze around April 19. That leaves a frost-free growing season of about 197 days.

Heilbronn weather records

The hottest temperature on record at the Heilbronn station is 39°C, on June 27, 2026. The coldest is -17°C, on December 26, 2010.

The wettest day on record brought 117 mm of rain, on June 17, 1978.

57 all-time records have been set at the station since 1970.

The best time to visit Heilbronn

The most comfortable time to visit is typically April to June and August to September, when daytime highs sit near 22°C.

Winter (December–February) is chilly, with average highs around 6°C and lows near -1°C.

Spring (March–May) is mild, with average highs around 16°C and lows near 5°C.

Summer (June–August) is warm, with average highs around 26°C and lows near 13°C.

Autumn (September–November) is mild, with average highs around 16°C and lows near 6°C.

Heilbronn climate questions

How much rain does Heilbronn get?

Heilbronn gets 802 mm of precipitation in an average year, over about 160 rainy days.

What is the wettest month in Heilbronn?

July is the wettest month in Heilbronn, with 84 mm. April is the driest, with 47 mm.

How many rainy days does Heilbronn have a year?

Heilbronn has about 160 days with measurable rain in an average year. December has the most, about 17.

What is the hottest month in Heilbronn?

July is the warmest month in Heilbronn, with an average high of 27°C.

What is the coldest month in Heilbronn?

January is the coldest month in Heilbronn, with an average low of -1°C.

What is the record high temperature in Heilbronn?

The record high at the Heilbronn station is 39°C, set on June 27, 2026. The record low is -17°C, on December 26, 2010.

What is the sunniest month in Heilbronn?

September is the sunniest month in Heilbronn, with sunshine about 44% of daylight hours. December is the cloudiest.

When is the first frost in Heilbronn?

The first fall freeze in Heilbronn typically comes around November 2. The last spring freeze is around April 19.

What is the best time to visit Heilbronn?

The most comfortable time to visit is typically April to June and August to September, when daytime highs sit near 22°C.