Simmern climate — normals and trends
Simmern (Germany) has a temperate oceanic climate (Cfb) under the Köppen-Geiger classification. Its mean annual temperature is 8.9 °C and it receives 679 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 (17.5 °C on average) and the coldest is January (0.3 °C). Rainfall peaks in May.
Simmern averages 73 frost days, 4 hot days (≥ 30 °C) and 139 rainy days per year.
Simmern has warmed by +2.0 °C between 1940 and 2025, or +0.24 °C per decade. This trend is statistically significant.
The number of frost days there went from about 90 to 56 per year over the period.
The hottest day of the period reached 37.2 °C (on 2 July 2025) and the coldest -23.5 °C (on 2 February 1956).
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
SimmernRhineland-Palatinate
- coords
- 49.98°, 7.52°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
8.9°C
Average daily high
12.4°C
Average daily low
5.5°C
Annual rainfall
679mm
Sunshine / day
7.5h
Mean relative humidity
79%
Average peak wind
16.4km/h
Seasonal range
17.2°C
Frost days (< 0 °C)
73 d/yr
Hot days (≥ 30 °C)
4 d/yr
Rainy days (≥ 1 mm)
139 d/yr
Annual snowfall
42.2 cm
Average feels-like high
9.9 °C
Average feels-like low
2.7 °C
Average peak gust
36.8 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
11.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.0 °C
since 1940
+0.2 °C per decade · r² = 0.43 · 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
37.2 °C
2 July 2025
Coldest day
-23.5 °C
2 February 1956
Wettest day
60 mm
30 June 2024
Windiest day
49.2 km/h
1 March 1990
Strongest gust
126.4 km/h
18 January 2007
Hottest feels-like
38.9 °C
6 July 1957
Coldest feels-like
-28.9 °C
2 February 1956
Snowiest day
15.1 cm
27 April 1981
Sunniest day
15.1 h
1 July 1940
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 | 4.5 °C | +2.1 °C | 103 mm | +51 mm |
| Feb | 4.9 °C | +1.0 °C | 34 mm | -13 mm |
| Mar | 12.2 °C | +4.0 °C | 18 mm | -35 mm |
| Apr | 15.7 °C | +3.2 °C | 30 mm | -23 mm |
| May | 19.6 °C | +2.9 °C | 41 mm | -27 mm |
| Jun | 25.0 °C | +5.1 °C | 32 mm | -32 mm |
| Jul | 24.6 °C | +2.6 °C | 79 mm | +19 mm |
| Aug | 25.8 °C | +4.1 °C | 30 mm | -30 mm |
| Sep | 18.5 °C | +0.5 °C | 129 mm | +74 mm |
| Oct | 12.8 °C | +0.1 °C | 65 mm | +14 mm |
| Nov | 8.5 °C | +1.8 °C | 43 mm | -15 mm |
| Dec | 6.0 °C | +2.5 °C | 22 mm | -36 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 Simmern?
Simmern has a temperate oceanic climate (Köppen Cfb). Over 1940-2025, the average annual temperature is 8.9 °C and it receives 679 mm of precipitation per year.
What is the hottest day ever recorded in Simmern?
The hottest day measured in Simmern between 1940 and 2025 was 2 July 2025, reaching 37.2 °C.
What is the coldest day in Simmern?
The coldest day measured in Simmern between 1940 and 2025 was 2 February 1956, at -23.5 °C.
Does it snow in Simmern?
Yes. Simmern gets on average 42.2 cm of snow per year and has around 73 frost days.
Has the climate of Simmern warmed?
Yes: Simmern warmed by +2.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Simmern?
The wettest day measured in Simmern between 1940 and 2025 was 30 June 2024, with 60 mm of rain in 24 hours.
What was the windiest day in Simmern?
The windiest day measured in Simmern between 1940 and 2025 was 1 March 1990, with winds reaching 49.2 km/h.
What is the warmest month in Simmern?
The warmest month in Simmern is July (17.5 °C on average); the coldest is January (0.3 °C).
How much does it rain in Simmern?
Simmern receives on average 679 mm of precipitation per year, spread over about 139 rainy days.
Is it sunny in Simmern?
Simmern gets on average 7.5 hours of sunshine per day, roughly 2,738 hours per year over 1940-2025.
What is the biggest single-day snowfall in Simmern?
The heaviest 24-hour snowfall measured in Simmern between 1940 and 2025 was 27 April 1981, with 15.1 cm.
Are there tropical nights in Simmern?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Simmern.
What was the most extreme apparent temperature in Simmern?
In Simmern, between 1940 and 2025, the highest apparent temperature reached 38.9 °C on 6 July 1957, and the lowest was -28.9 °C on 2 February 1956.
Compare Simmern with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Simmern