Ulm, Baden-Wurttemberg Weather by Month and Climate Averages

How much rain does Ulm get?

Ulm gets 950 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 103 mm. April is the driest, with 61 mm. December has the most rainy days, about 18.

The longest dry spell in the last five years lasted 21 days, to June 4, 2023.

Ulm weather by month

Ulm weather in January

In January, Ulm averages a high of 2°C and a low of -4°C. It gets 73 mm of precipitation over about 16 rainy days. The sun is out about 24% of daylight hours. The January record high is 16°C (2002) and the record low is -25°C (1987).

Ulm weather in February

In February, Ulm averages a high of 3°C and a low of -4°C. It gets 65 mm of precipitation over about 14 rainy days. The sun is out about 31% of daylight hours. The February record high is 19°C (1998) and the record low is -23°C (2012).

Ulm weather in March

In March, Ulm averages a high of 8°C and a low of -1°C. It gets 75 mm of precipitation over about 15 rainy days. The sun is out about 39% of daylight hours. The March record high is 22°C (2021) and the record low is -21°C (1971).

Ulm weather in April

In April, Ulm averages a high of 13°C and a low of 2°C. It gets 61 mm of precipitation over about 14 rainy days. The sun is out about 39% of daylight hours. The April record high is 28°C (2012) and the record low is -12°C (2010).

Ulm weather in May

In May, Ulm averages a high of 17°C and a low of 6°C. It gets 96 mm of precipitation over about 15 rainy days. The sun is out about 33% of daylight hours. The May record high is 29°C (2017) and the record low is -5°C (2019). May is one of the most comfortable months to visit.

Ulm weather in June

In June, Ulm averages a high of 21°C and a low of 10°C. It gets 94 mm of precipitation over about 15 rainy days. The sun is out about 40% of daylight hours. The June record high is 32°C (2014) and the record low is 1°C (1972). June is one of the most comfortable months to visit.

Ulm weather in July

In July, Ulm averages a high of 22°C and a low of 12°C. It gets 103 mm of precipitation over about 15 rainy days. The sun is out about 42% of daylight hours. The July record high is 34°C (2022) and the record low is 2°C (2011).

Ulm weather in August

In August, Ulm averages a high of 22°C and a low of 11°C. It gets 83 mm of precipitation over about 14 rainy days. The sun is out about 42% of daylight hours. The August record high is 36°C (2003) and the record low is 2°C (1980). August is one of the most comfortable months to visit.

Ulm weather in September

In September, Ulm averages a high of 18°C and a low of 8°C. It gets 69 mm of precipitation over about 13 rainy days. The sun is out about 42% of daylight hours. The September record high is 30°C (2023) and the record low is -2°C (2022). September is one of the most comfortable months to visit.

Ulm weather in October

In October, Ulm averages a high of 12°C and a low of 4°C. It gets 73 mm of precipitation over about 14 rainy days. The sun is out about 25% of daylight hours. The October record high is 26°C (2023) and the record low is -9°C (2012).

Ulm weather in November

In November, Ulm averages a high of 6°C and a low of 0°C. It gets 72 mm of precipitation over about 15 rainy days. The sun is out about 23% of daylight hours. The November record high is 20°C (2009) and the record low is -18°C (2010).

Ulm weather in December

In December, Ulm averages a high of 3°C and a low of -3°C. It gets 84 mm of precipitation over about 18 rainy days. The sun is out about 20% of daylight hours. The December record high is 16°C (1985) and the record low is -24°C (1973).

Sunshine, humidity and wind in Ulm

July is the sunniest month in Ulm, with sunshine about 42% of daylight hours. December is the cloudiest, at 20%. Over the year the sun shines about 33% of daylight hours. Ulm is sunnier than 74% of Germany.

Humidity peaks in December at 88% and is lowest in April at 65%.

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

First and last freeze in Ulm

The first fall freeze in Ulm typically comes around October 19, and the last spring freeze around May 4. That leaves a frost-free growing season of about 168 days.

Ulm weather records

The hottest temperature on record at the Ulm station is 36°C, on August 13, 2003. The coldest is -25°C, on January 13, 1987.

The wettest day on record brought 87 mm of rain, on November 6, 1979.

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

The annual mean temperature has changed by +0.3°C per decade since 1970.

The best time to visit Ulm

The most comfortable time to visit is typically May to June and August to September, when daytime highs sit near 19°C.

Winter (December–February) is cold, with average highs around 3°C and lows near -4°C.

Spring (March–May) is chilly, with average highs around 12°C and lows near 3°C.

Summer (June–August) is warm, with average highs around 22°C and lows near 11°C. It can feel humid.

Autumn (September–November) is chilly, with average highs around 12°C and lows near 4°C.

Ulm climate questions

How much rain does Ulm get?

Ulm gets 950 mm of precipitation in an average year, over about 178 rainy days.

What is the wettest month in Ulm?

July is the wettest month in Ulm, with 103 mm. April is the driest, with 61 mm.

How many rainy days does Ulm have a year?

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

What is the hottest month in Ulm?

July is the warmest month in Ulm, with an average high of 22°C.

What is the coldest month in Ulm?

January is the coldest month in Ulm, with an average low of -4°C.

What is the record high temperature in Ulm?

The record high at the Ulm station is 36°C, set on August 13, 2003. The record low is -25°C, on January 13, 1987.

What is the sunniest month in Ulm?

July is the sunniest month in Ulm, with sunshine about 42% of daylight hours. December is the cloudiest.

When is the first frost in Ulm?

The first fall freeze in Ulm typically comes around October 19. The last spring freeze is around May 4.

What is the best time to visit Ulm?

The most comfortable time to visit is typically May to June and August to September, when daytime highs sit near 19°C.