Altona, Hamburg Weather by Month and Climate Averages

How much rain does Altona get?

Altona gets 746 mm of precipitation in an average year, spread over about 178 days with measurable rain. That is more rainy days than 77% of Germany.

July is the wettest month, with 80 mm. April is the driest, with 39 mm. December has the most rainy days, about 18.

The longest dry spell in the last five years lasted 26 days, to May 9, 2022.

Altona weather by month

Altona weather in January

In January, Altona averages a high of 4°C and a low of 0°C. It gets 67 mm of precipitation over about 17 rainy days. The sun is out about 19% of daylight hours. The January record high is 16°C (2023) and the record low is -21°C (1979).

Altona weather in February

In February, Altona averages a high of 6°C and a low of 0°C. It gets 54 mm of precipitation over about 15 rainy days. The sun is out about 22% of daylight hours. The February record high is 21°C (2021) and the record low is -19°C (1986).

Altona weather in March

In March, Altona averages a high of 9°C and a low of 2°C. It gets 57 mm of precipitation over about 14 rainy days. The sun is out about 36% of daylight hours. The March record high is 24°C (2021) and the record low is -16°C (2006).

Altona weather in April

In April, Altona averages a high of 14°C and a low of 4°C. It gets 39 mm of precipitation over about 12 rainy days. The sun is out about 39% of daylight hours. The April record high is 28°C (2018) and the record low is -6°C (1986).

Altona weather in May

In May, Altona averages a high of 18°C and a low of 8°C. It gets 57 mm of precipitation over about 13 rainy days. The sun is out about 36% of daylight hours. The May record high is 34°C (2005) and the record low is -2°C (1980). May is one of the most comfortable months to visit.

Altona weather in June

In June, Altona averages a high of 21°C and a low of 12°C. It gets 72 mm of precipitation over about 14 rainy days. The sun is out about 41% of daylight hours. The June record high is 39°C (2026) and the record low is 2°C (1975). June is one of the most comfortable months to visit.

Altona weather in July

In July, Altona averages a high of 23°C and a low of 14°C. It gets 80 mm of precipitation over about 15 rainy days. The sun is out about 34% of daylight hours. The July record high is 40°C (2022) and the record low is 4°C (1971).

Altona weather in August

In August, Altona averages a high of 23°C and a low of 14°C. It gets 76 mm of precipitation over about 15 rainy days. The sun is out about 38% of daylight hours. The August record high is 37°C (1992) and the record low is 3°C (1973). August is one of the most comfortable months to visit.

Altona weather in September

In September, Altona averages a high of 19°C and a low of 11°C. It gets 58 mm of precipitation over about 13 rainy days. The sun is out about 37% of daylight hours. The September record high is 32°C (2024) and the record low is 1°C (1971). September is one of the most comfortable months to visit.

Altona weather in October

In October, Altona averages a high of 14°C and a low of 7°C. It gets 59 mm of precipitation over about 15 rainy days. The sun is out about 26% of daylight hours. The October record high is 28°C (2018) and the record low is -7°C (2003).

Altona weather in November

In November, Altona averages a high of 8°C and a low of 3°C. It gets 57 mm of precipitation over about 16 rainy days. The sun is out about 19% of daylight hours. The November record high is 21°C (2014) and the record low is -10°C (1973).

Altona weather in December

In December, Altona averages a high of 5°C and a low of 1°C. It gets 69 mm of precipitation over about 18 rainy days. The sun is out about 14% of daylight hours. The December record high is 16°C (2022) and the record low is -18°C (1981).

Sunshine, humidity and wind in Altona

June is the sunniest month in Altona, with sunshine about 41% of daylight hours. December is the cloudiest, at 14%. Over the year the sun shines about 30% of daylight hours. Altona is cloudier than 81% of Germany.

Humidity peaks in December at 90% and is lowest in June at 66%.

Altona has about 3 days a year above 32°C. Altona is cooler than 76% of Germany.

First and last freeze in Altona

The first fall freeze in Altona typically comes around October 29, and the last spring freeze around April 20. That leaves a frost-free growing season of about 192 days.

Altona weather records

The hottest temperature on record at the Altona station is 40°C, on July 20, 2022. The coldest is -21°C, on January 1, 1979.

The wettest day on record brought 83 mm of rain, on August 27, 1989.

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

The annual mean temperature has changed by +0.4°C per decade since 1970.

The best time to visit Altona

The most comfortable time to visit is typically May to June and August to September, when daytime highs sit near 21°C.

Winter (December–February) is chilly, with average highs around 5°C and lows near 0°C.

Spring (March–May) is mild, with average highs around 14°C and lows near 5°C.

Summer (June–August) is warm, with average highs around 23°C and lows near 13°C. It can feel humid.

Autumn (September–November) is mild, with average highs around 14°C and lows near 7°C.

Altona climate questions

How much rain does Altona get?

Altona gets 746 mm of precipitation in an average year, over about 178 rainy days.

What is the wettest month in Altona?

July is the wettest month in Altona, with 80 mm. April is the driest, with 39 mm.

How many rainy days does Altona have a year?

Altona has about 178 days with measurable rain in an average year. December has the most, about 18.

What is the hottest month in Altona?

July is the warmest month in Altona, with an average high of 23°C.

What is the coldest month in Altona?

January is the coldest month in Altona, with an average low of 0°C.

What is the record high temperature in Altona?

The record high at the Altona station is 40°C, set on July 20, 2022. The record low is -21°C, on January 1, 1979.

What is the sunniest month in Altona?

June is the sunniest month in Altona, with sunshine about 41% of daylight hours. December is the cloudiest.

When is the first frost in Altona?

The first fall freeze in Altona typically comes around October 29. The last spring freeze is around April 20.

What is the best time to visit Altona?

The most comfortable time to visit is typically May to June and August to September, when daytime highs sit near 21°C.