Tamm climate — normals and trends
Tamm (Germany) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 9.9 °C and it receives 859 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 (19.1 °C on average) and the coldest is January (0.7 °C). Rainfall peaks in May.
Tamm averages 67 frost days, 8 hot days (≥ 30 °C) and 150 rainy days per year.
Tamm has warmed by +1.8 °C between 1940 and 2025, or +0.22 °C per decade. This trend is statistically significant.
The number of frost days there went from about 82 to 52 per year over the period.
The hottest day of the period reached 37.8 °C (on 5 July 2015) and the coldest -26.2 °C (on 19 January 1940).
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
TammBaden-Wurttemberg
- coords
- 48.92°, 9.12°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
9.9°C
Average daily high
13.7°C
Average daily low
6.3°C
Annual rainfall
859mm
Sunshine / day
8.1h
Mean relative humidity
76%
Average peak wind
14.5km/h
Seasonal range
18.4°C
Frost days (< 0 °C)
67 d/yr
Hot days (≥ 30 °C)
8 d/yr
Rainy days (≥ 1 mm)
150 d/yr
Annual snowfall
43.6 cm
Average feels-like high
11.6 °C
Average feels-like low
3.8 °C
Average peak gust
32.4 km/h
Tropical nights (≥ 20 °C)
1 d/yr
Solar radiation
11.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.8 °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
37.8 °C
5 July 2015
Coldest day
-26.2 °C
19 January 1940
Wettest day
66 mm
23 May 1978
Windiest day
56.4 km/h
26 December 1999
Strongest gust
125.3 km/h
26 December 1999
Hottest feels-like
41.0 °C
6 July 1957
Coldest feels-like
-31.6 °C
19 January 1940
Snowiest day
18.2 cm
10 April 1973
Sunniest day
15.1 h
19 June 2017
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 | 6.0 °C | +2.9 °C | 78 mm | +12 mm |
| Feb | 6.1 °C | +1.0 °C | 54 mm | -10 mm |
| Mar | 12.7 °C | +3.0 °C | 24 mm | -44 mm |
| Apr | 17.2 °C | +3.1 °C | 42 mm | -24 mm |
| May | 20.6 °C | +2.2 °C | 56 mm | -29 mm |
| Jun | 26.9 °C | +5.2 °C | 76 mm | -4 mm |
| Jul | 25.5 °C | +1.7 °C | 108 mm | +30 mm |
| Aug | 27.1 °C | +3.7 °C | 67 mm | -9 mm |
| Sep | 19.7 °C | +0.1 °C | 168 mm | +104 mm |
| Oct | 14.2 °C | +0.2 °C | 80 mm | +16 mm |
| Nov | 9.0 °C | +1.4 °C | 60 mm | -11 mm |
| Dec | 6.2 °C | +2.1 °C | 21 mm | -55 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 Tamm?
Tamm has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 9.9 °C and it receives 859 mm of precipitation per year.
What is the hottest day ever recorded in Tamm?
The hottest day measured in Tamm between 1940 and 2025 was 5 July 2015, reaching 37.8 °C.
What is the coldest day in Tamm?
The coldest day measured in Tamm between 1940 and 2025 was 19 January 1940, at -26.2 °C.
Does it snow in Tamm?
Yes. Tamm gets on average 43.6 cm of snow per year and has around 67 frost days.
Has the climate of Tamm warmed?
Yes: Tamm warmed by +1.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Tamm?
The wettest day measured in Tamm between 1940 and 2025 was 23 May 1978, with 66 mm of rain in 24 hours.
What was the windiest day in Tamm?
The windiest day measured in Tamm between 1940 and 2025 was 26 December 1999, with winds reaching 56.4 km/h.
What is the warmest month in Tamm?
The warmest month in Tamm is July (19.1 °C on average); the coldest is January (0.7 °C).
How much does it rain in Tamm?
Tamm receives on average 859 mm of precipitation per year, spread over about 150 rainy days.
Is it sunny in Tamm?
Tamm gets on average 8.1 hours of sunshine per day, roughly 2,957 hours per year over 1940-2025.
What is the biggest single-day snowfall in Tamm?
The heaviest 24-hour snowfall measured in Tamm between 1940 and 2025 was 10 April 1973, with 18.2 cm.
Are there tropical nights in Tamm?
Yes: Tamm has on average 1 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Tamm?
In Tamm, between 1940 and 2025, the highest apparent temperature reached 41.0 °C on 6 July 1957, and the lowest was -31.6 °C on 19 January 1940.
Compare Tamm with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Tamm