Billdal climate — normals and trends
Billdal (Sweden) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 7.8 °C and it receives 814 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 (-0.8 °C). Rainfall peaks in August.
Billdal averages 85 frost days, 1 hot days (≥ 30 °C) and 143 rainy days per year.
Billdal has warmed by +1.8 °C between 1940 and 2025, or +0.21 °C per decade. This trend is statistically significant.
The number of frost days there went from about 101 to 69 per year over the period.
The hottest day of the period reached 33.1 °C (on 9 August 1975) and the coldest -24.0 °C (on 28 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
BilldalVästra Götaland County
- coords
- 57.57°, 11.93°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
7.8°C
Average daily high
10.7°C
Average daily low
4.9°C
Annual rainfall
814mm
Sunshine / day
8.0h
Mean relative humidity
80%
Average peak wind
20.1km/h
Seasonal range
17.8°C
Frost days (< 0 °C)
85 d/yr
Hot days (≥ 30 °C)
1 d/yr
Rainy days (≥ 1 mm)
143 d/yr
Annual snowfall
62.6 cm
Average feels-like high
7.7 °C
Average feels-like low
1.4 °C
Average peak gust
42.1 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
10.4 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.8 °C
since 1940
+0.2 °C per decade · r² = 0.28 · 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
33.1 °C
9 August 1975
Coldest day
-24.0 °C
28 January 1942
Wettest day
47 mm
4 August 2008
Windiest day
68.4 km/h
22 September 1969
Strongest gust
143.3 km/h
8 January 2005
Hottest feels-like
34.5 °C
9 August 1975
Coldest feels-like
-30.9 °C
25 January 1942
Snowiest day
16.9 cm
17 November 1995
Sunniest day
17.2 h
16 June 2010
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 | 4.1 °C | +2.8 °C | 89 mm | +25 mm |
| Feb | 2.9 °C | +1.5 °C | 34 mm | -14 mm |
| Mar | 8.5 °C | +3.7 °C | 30 mm | -16 mm |
| Apr | 13.4 °C | +3.6 °C | 28 mm | -22 mm |
| May | 14.7 °C | -0.6 °C | 52 mm | -3 mm |
| Jun | 18.1 °C | -0.6 °C | 88 mm | +21 mm |
| Jul | 22.8 °C | +2.3 °C | 105 mm | +23 mm |
| Aug | 20.2 °C | +0.4 °C | 49 mm | -45 mm |
| Sep | 17.9 °C | +1.9 °C | 126 mm | +43 mm |
| Oct | 12.1 °C | +0.9 °C | 91 mm | +9 mm |
| Nov | 7.0 °C | +0.8 °C | 72 mm | -2 mm |
| Dec | 5.9 °C | +2.8 °C | 70 mm | +1 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 Billdal?
Billdal has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 7.8 °C and it receives 814 mm of precipitation per year.
What is the hottest day ever recorded in Billdal?
The hottest day measured in Billdal between 1940 and 2025 was 9 August 1975, reaching 33.1 °C.
What is the coldest day in Billdal?
The coldest day measured in Billdal between 1940 and 2025 was 28 January 1942, at -24.0 °C.
Does it snow in Billdal?
Yes. Billdal gets on average 62.6 cm of snow per year and has around 85 frost days.
Has the climate of Billdal warmed?
Yes: Billdal warmed by +1.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Billdal?
The wettest day measured in Billdal between 1940 and 2025 was 4 August 2008, with 47 mm of rain in 24 hours.
What was the windiest day in Billdal?
The windiest day measured in Billdal between 1940 and 2025 was 22 September 1969, with winds reaching 68.4 km/h.
What is the warmest month in Billdal?
The warmest month in Billdal is July (17.0 °C on average); the coldest is February (-0.8 °C).
How much does it rain in Billdal?
Billdal receives on average 814 mm of precipitation per year, spread over about 143 rainy days.
Is it sunny in Billdal?
Billdal gets on average 8.0 hours of sunshine per day, roughly 2,920 hours per year over 1940-2025.
What is the biggest single-day snowfall in Billdal?
The heaviest 24-hour snowfall measured in Billdal between 1940 and 2025 was 17 November 1995, with 16.9 cm.
Are there tropical nights in Billdal?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Billdal.
What was the most extreme apparent temperature in Billdal?
In Billdal, between 1940 and 2025, the highest apparent temperature reached 34.5 °C on 9 August 1975, and the lowest was -30.9 °C on 25 January 1942.
Compare Billdal with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Billdal