Ulm climate — normals and trends
Ulm (Germany) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 8.4 °C and it receives 893 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is July (17.6 °C on average) and the coldest is January (-1.0 °C). Rainfall peaks in June.
Ulm averages 94 frost days, 3 hot days (≥ 30 °C) and 153 rainy days per year.
Ulm has warmed by +1.7 °C between 1940 and 2025, or +0.21 °C per decade. This trend is statistically significant.
The number of frost days there went from about 110 to 79 per year over the period.
The hottest day of the period reached 35.6 °C (on 13 August 2003) and the coldest -27.4 °C (on 13 January 1987).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
UlmBaden-Wurttemberg
- coords
- 48.40°, 9.99°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
8.4°C
Average daily high
12.3°C
Average daily low
4.7°C
Annual rainfall
893mm
Sunshine / day
7.9h
Mean relative humidity
78%
Average peak wind
15.1km/h
Seasonal range
18.6°C
Frost days (< 0 °C)
94 d/yr
Hot days (≥ 30 °C)
3 d/yr
Rainy days (≥ 1 mm)
153 d/yr
Annual snowfall
74.3 cm
Average feels-like high
9.9 °C
Average feels-like low
1.9 °C
Average peak gust
33.1 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
11.7 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.7 °C
since 1940
+0.2 °C per decade · r² = 0.37 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
35.6 °C
13 August 2003
Coldest day
-27.4 °C
13 January 1987
Wettest day
61 mm
3 August 1968
Windiest day
55.6 km/h
26 December 1999
Strongest gust
127.1 km/h
26 December 1999
Hottest feels-like
39.0 °C
6 July 1957
Coldest feels-like
-33.1 °C
10 February 1956
Snowiest day
19.7 cm
10 April 1973
Sunniest day
15.1 h
14 June 1996
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 4.2 °C | +2.7 °C | 89 mm | +30 mm |
| Feb | 4.5 °C | +0.9 °C | 51 mm | -5 mm |
| Mar | 10.8 °C | +2.5 °C | 40 mm | -22 mm |
| Apr | 15.9 °C | +3.2 °C | 37 mm | -34 mm |
| May | 18.3 °C | +1.3 °C | 67 mm | -29 mm |
| Jun | 25.3 °C | +5.0 °C | 91 mm | -11 mm |
| Jul | 23.3 °C | +0.9 °C | 139 mm | +41 mm |
| Aug | 24.9 °C | +2.9 °C | 91 mm | -2 mm |
| Sep | 18.6 °C | +0.3 °C | 169 mm | +101 mm |
| Oct | 12.7 °C | 0.0 °C | 60 mm | +1 mm |
| Nov | 7.5 °C | +1.4 °C | 71 mm | +6 mm |
| Dec | 4.0 °C | +1.5 °C | 20 mm | -44 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Ulm?
Ulm has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 8.4 °C and it receives 893 mm of precipitation per year.
What is the hottest day ever recorded in Ulm?
The hottest day measured in Ulm between 1940 and 2025 was 13 August 2003, reaching 35.6 °C.
What is the coldest day in Ulm?
The coldest day measured in Ulm between 1940 and 2025 was 13 January 1987, at -27.4 °C.
Does it snow in Ulm?
Yes. Ulm gets on average 74.3 cm of snow per year and has around 94 frost days.
Has the climate of Ulm warmed?
Yes: Ulm warmed by +1.7 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Ulm?
The wettest day measured in Ulm between 1940 and 2025 was 3 August 1968, with 61 mm of rain in 24 hours.
What was the windiest day in Ulm?
The windiest day measured in Ulm between 1940 and 2025 was 26 December 1999, with winds reaching 55.6 km/h.
What is the warmest month in Ulm?
The warmest month in Ulm is July (17.6 °C on average); the coldest is January (-1.0 °C).
How much does it rain in Ulm?
Ulm receives on average 893 mm of precipitation per year, spread over about 153 rainy days.
Is it sunny in Ulm?
Ulm gets on average 7.9 hours of sunshine per day, roughly 2,884 hours per year over 1940-2025.
What is the biggest single-day snowfall in Ulm?
The heaviest 24-hour snowfall measured in Ulm between 1940 and 2025 was 10 April 1973, with 19.7 cm.
Are there tropical nights in Ulm?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Ulm.
What was the most extreme apparent temperature in Ulm?
In Ulm, between 1940 and 2025, the highest apparent temperature reached 39.0 °C on 6 July 1957, and the lowest was -33.1 °C on 10 February 1956.
Compare Ulm with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Ulm