Ronneby climate — normals and trends
Ronneby (Sweden) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 7.6 °C and it receives 618 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 (16.7 °C on average) and the coldest is February (-0.7 °C). Rainfall peaks in July.
Ronneby averages 80 frost days, 0 hot days (≥ 30 °C) and 126 rainy days per year.
Ronneby has warmed by +2.0 °C between 1940 and 2025, or +0.23 °C per decade. This trend is statistically significant.
The number of frost days there went from about 100 to 60 per year over the period.
The hottest day of the period reached 29.8 °C (on 9 August 1975) and the coldest -23.0 °C (on 27 January 1942).
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
RonnebyBlekinge County
- coords
- 56.21°, 15.28°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
7.6°C
Average daily high
10.0°C
Average daily low
5.1°C
Annual rainfall
618mm
Sunshine / day
7.8h
Mean relative humidity
81%
Average peak wind
21.4km/h
Seasonal range
17.4°C
Frost days (< 0 °C)
80 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
126 d/yr
Annual snowfall
66.7 cm
Average feels-like high
6.8 °C
Average feels-like low
1.5 °C
Average peak gust
39.2 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
10.2 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.0 °C
since 1940
+0.2 °C per decade · r² = 0.37 · 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
29.8 °C
9 August 1975
Coldest day
-23.0 °C
27 January 1942
Wettest day
46 mm
9 July 1996
Windiest day
60.0 km/h
8 January 2005
Strongest gust
117.0 km/h
18 October 1967
Hottest feels-like
31.7 °C
16 July 2021
Coldest feels-like
-29.6 °C
25 January 1942
Snowiest day
18.9 cm
11 January 1968
Sunniest day
16.4 h
21 June 2025
Normals computed over complete calendar years 1940–2025.
A specific year
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Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 3.9 °C | +2.8 °C | 76 mm | +24 mm |
| Feb | 2.7 °C | +1.4 °C | 12 mm | -29 mm |
| Mar | 7.5 °C | +3.6 °C | 8 mm | -29 mm |
| Apr | 11.8 °C | +3.5 °C | 11 mm | -26 mm |
| May | 13.4 °C | +0.2 °C | 47 mm | +3 mm |
| Jun | 18.0 °C | +0.6 °C | 47 mm | -4 mm |
| Jul | 20.9 °C | +1.3 °C | 95 mm | +29 mm |
| Aug | 20.0 °C | +0.7 °C | 29 mm | -32 mm |
| Sep | 17.8 °C | +2.1 °C | 65 mm | +10 mm |
| Oct | 11.8 °C | +0.9 °C | 75 mm | +18 mm |
| Nov | 6.7 °C | +0.7 °C | 41 mm | -18 mm |
| Dec | 5.6 °C | +2.7 °C | 23 mm | -34 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 Ronneby?
Ronneby has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 7.6 °C and it receives 618 mm of precipitation per year.
What is the hottest day ever recorded in Ronneby?
The hottest day measured in Ronneby between 1940 and 2025 was 9 August 1975, reaching 29.8 °C.
What is the coldest day in Ronneby?
The coldest day measured in Ronneby between 1940 and 2025 was 27 January 1942, at -23.0 °C.
Does it snow in Ronneby?
Yes. Ronneby gets on average 66.7 cm of snow per year and has around 80 frost days.
Has the climate of Ronneby warmed?
Yes: Ronneby warmed by +2.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Ronneby?
The wettest day measured in Ronneby between 1940 and 2025 was 9 July 1996, with 46 mm of rain in 24 hours.
What was the windiest day in Ronneby?
The windiest day measured in Ronneby between 1940 and 2025 was 8 January 2005, with winds reaching 60.0 km/h.
What is the warmest month in Ronneby?
The warmest month in Ronneby is July (16.7 °C on average); the coldest is February (-0.7 °C).
How much does it rain in Ronneby?
Ronneby receives on average 618 mm of precipitation per year, spread over about 126 rainy days.
Is it sunny in Ronneby?
Ronneby gets on average 7.8 hours of sunshine per day, roughly 2,847 hours per year over 1940-2025.
What is the biggest single-day snowfall in Ronneby?
The heaviest 24-hour snowfall measured in Ronneby between 1940 and 2025 was 11 January 1968, with 18.9 cm.
Are there tropical nights in Ronneby?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Ronneby.
What was the most extreme apparent temperature in Ronneby?
In Ronneby, between 1940 and 2025, the highest apparent temperature reached 31.7 °C on 16 July 2021, and the lowest was -29.6 °C on 25 January 1942.
Compare Ronneby with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Ronneby