Nyköping climate — normals and trends
Nyköping (Sweden) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 6.8 °C and it receives 616 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 (17.0 °C on average) and the coldest is February (-2.1 °C). Rainfall peaks in August.
Nyköping averages 100 frost days, 0 hot days (≥ 30 °C) and 122 rainy days per year.
Nyköping has warmed by +1.9 °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 117 to 83 per year over the period.
The hottest day of the period reached 30.7 °C (on 7 August 1975) and the coldest -23.7 °C (on 10 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
NyköpingSödermanland County
- coords
- 58.75°, 17.01°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
6.8°C
Average daily high
9.1°C
Average daily low
4.4°C
Annual rainfall
616mm
Sunshine / day
7.8h
Mean relative humidity
80%
Average peak wind
21.2km/h
Seasonal range
19.1°C
Frost days (< 0 °C)
100 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
122 d/yr
Annual snowfall
82.3 cm
Average feels-like high
5.8 °C
Average feels-like low
0.7 °C
Average peak gust
36.8 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
10.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.9 °C
since 1940
+0.2 °C per decade · r² = 0.29 · 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
30.7 °C
7 August 1975
Coldest day
-23.7 °C
10 January 1987
Wettest day
55 mm
29 July 2025
Windiest day
54.8 km/h
22 February 2002
Strongest gust
103.7 km/h
22 February 2002
Hottest feels-like
31.4 °C
7 August 1975
Coldest feels-like
-31.9 °C
10 January 1987
Snowiest day
18.5 cm
6 December 1985
Sunniest day
17.9 h
25 June 2024
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 | 2.3 °C | +2.5 °C | 71 mm | +26 mm |
| Feb | 1.5 °C | +1.7 °C | 15 mm | -21 mm |
| Mar | 6.6 °C | +3.8 °C | 9 mm | -23 mm |
| Apr | 10.3 °C | +3.1 °C | 18 mm | -20 mm |
| May | 12.6 °C | +0.3 °C | 44 mm | +1 mm |
| Jun | 17.6 °C | +0.5 °C | 55 mm | +2 mm |
| Jul | 21.6 °C | +1.8 °C | 126 mm | +58 mm |
| Aug | 19.0 °C | -0.1 °C | 51 mm | -19 mm |
| Sep | 17.3 °C | +2.2 °C | 71 mm | +10 mm |
| Oct | 11.0 °C | +1.4 °C | 65 mm | +8 mm |
| Nov | 5.8 °C | +1.1 °C | 50 mm | -10 mm |
| Dec | 5.0 °C | +3.3 °C | 45 mm | -9 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 Nyköping?
Nyköping has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 6.8 °C and it receives 616 mm of precipitation per year.
What is the hottest day ever recorded in Nyköping?
The hottest day measured in Nyköping between 1940 and 2025 was 7 August 1975, reaching 30.7 °C.
What is the coldest day in Nyköping?
The coldest day measured in Nyköping between 1940 and 2025 was 10 January 1987, at -23.7 °C.
Does it snow in Nyköping?
Yes. Nyköping gets on average 82.3 cm of snow per year and has around 100 frost days.
Has the climate of Nyköping warmed?
Yes: Nyköping warmed by +1.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Nyköping?
The wettest day measured in Nyköping between 1940 and 2025 was 29 July 2025, with 55 mm of rain in 24 hours.
What was the windiest day in Nyköping?
The windiest day measured in Nyköping between 1940 and 2025 was 22 February 2002, with winds reaching 54.8 km/h.
What is the warmest month in Nyköping?
The warmest month in Nyköping is July (17.0 °C on average); the coldest is February (-2.1 °C).
How much does it rain in Nyköping?
Nyköping receives on average 616 mm of precipitation per year, spread over about 122 rainy days.
Is it sunny in Nyköping?
Nyköping 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 Nyköping?
The heaviest 24-hour snowfall measured in Nyköping between 1940 and 2025 was 6 December 1985, with 18.5 cm.
Are there tropical nights in Nyköping?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Nyköping.
What was the most extreme apparent temperature in Nyköping?
In Nyköping, between 1940 and 2025, the highest apparent temperature reached 31.4 °C on 7 August 1975, and the lowest was -31.9 °C on 10 January 1987.
Compare Nyköping with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Nyköping