Nykvarn climate — normals and trends
Nykvarn (Sweden) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 6.3 °C and it receives 607 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 (17.3 °C on average) and the coldest is February (-3.4 °C). Rainfall peaks in July.
Nykvarn averages 126 frost days, 0 hot days (≥ 30 °C) and 121 rainy days per year.
Nykvarn 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 140 to 112 per year over the period.
The hottest day of the period reached 33.6 °C (on 8 August 1975) and the coldest -30.5 °C (on 18 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
NykvarnStockholm County
- coords
- 59.18°, 17.43°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
6.3°C
Average daily high
9.5°C
Average daily low
3.0°C
Annual rainfall
607mm
Sunshine / day
7.5h
Mean relative humidity
80%
Average peak wind
16.1km/h
Seasonal range
20.7°C
Frost days (< 0 °C)
126 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
121 d/yr
Annual snowfall
82.8 cm
Average feels-like high
6.6 °C
Average feels-like low
-0.1 °C
Average peak gust
34.9 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
9.6 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.8 °C
since 1940
+0.2 °C per decade · r² = 0.26 · 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
33.6 °C
8 August 1975
Coldest day
-30.5 °C
18 January 1940
Wettest day
49 mm
31 August 2012
Windiest day
45.2 km/h
2 November 1969
Strongest gust
101.2 km/h
13 January 1984
Hottest feels-like
33.1 °C
7 August 1975
Coldest feels-like
-35.6 °C
18 January 1940
Snowiest day
17.4 cm
9 November 2010
Sunniest day
18.0 h
23 June 1959
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 | 1.6 °C | +2.8 °C | 65 mm | +25 mm |
| Feb | 1.5 °C | +2.3 °C | 8 mm | -23 mm |
| Mar | 7.7 °C | +4.6 °C | 7 mm | -24 mm |
| Apr | 11.9 °C | +3.3 °C | 20 mm | -18 mm |
| May | 13.9 °C | -0.8 °C | 38 mm | -8 mm |
| Jun | 19.3 °C | +0.1 °C | 71 mm | +6 mm |
| Jul | 23.7 °C | +2.5 °C | 106 mm | +24 mm |
| Aug | 19.6 °C | -0.4 °C | 66 mm | -14 mm |
| Sep | 18.0 °C | +2.6 °C | 70 mm | +14 mm |
| Oct | 10.8 °C | +1.1 °C | 51 mm | +2 mm |
| Nov | 5.0 °C | +1.1 °C | 34 mm | -15 mm |
| Dec | 4.6 °C | +3.9 °C | 37 mm | -7 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 Nykvarn?
Nykvarn has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 6.3 °C and it receives 607 mm of precipitation per year.
What is the hottest day ever recorded in Nykvarn?
The hottest day measured in Nykvarn between 1940 and 2025 was 8 August 1975, reaching 33.6 °C.
What is the coldest day in Nykvarn?
The coldest day measured in Nykvarn between 1940 and 2025 was 18 January 1940, at -30.5 °C.
Does it snow in Nykvarn?
Yes. Nykvarn gets on average 82.8 cm of snow per year and has around 126 frost days.
Has the climate of Nykvarn warmed?
Yes: Nykvarn warmed by +1.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Nykvarn?
The wettest day measured in Nykvarn between 1940 and 2025 was 31 August 2012, with 49 mm of rain in 24 hours.
What was the windiest day in Nykvarn?
The windiest day measured in Nykvarn between 1940 and 2025 was 2 November 1969, with winds reaching 45.2 km/h.
What is the warmest month in Nykvarn?
The warmest month in Nykvarn is July (17.3 °C on average); the coldest is February (-3.4 °C).
How much does it rain in Nykvarn?
Nykvarn receives on average 607 mm of precipitation per year, spread over about 121 rainy days.
Is it sunny in Nykvarn?
Nykvarn 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 Nykvarn?
The heaviest 24-hour snowfall measured in Nykvarn between 1940 and 2025 was 9 November 2010, with 17.4 cm.
Are there tropical nights in Nykvarn?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Nykvarn.
What was the most extreme apparent temperature in Nykvarn?
In Nykvarn, between 1940 and 2025, the highest apparent temperature reached 33.1 °C on 7 August 1975, and the lowest was -35.6 °C on 18 January 1940.
Compare Nykvarn with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Nykvarn