Ytterby climate — normals and trends
Ytterby (Åland Islands) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 6.2 °C and it receives 545 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 (16.5 °C on average) and the coldest is February (-2.9 °C). Rainfall peaks in August.
Ytterby averages 100 frost days, 0 hot days (≥ 30 °C) and 116 rainy days per year.
Ytterby 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 121 to 79 per year over the period.
The hottest day of the period reached 26.5 °C (on 1 August 2018) and the coldest -28.3 °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
YtterbyÅlands landsbygd
- coords
- 60.17°, 20.02°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
6.2°C
Average daily high
7.9°C
Average daily low
4.5°C
Annual rainfall
545mm
Sunshine / day
8.0h
Mean relative humidity
80%
Average peak wind
27.3km/h
Seasonal range
19.4°C
Frost days (< 0 °C)
100 d/yr
Hot days (≥ 30 °C)
0 d/yr
Rainy days (≥ 1 mm)
116 d/yr
Annual snowfall
86.5 cm
Average feels-like high
4.1 °C
Average feels-like low
0.0 °C
Average peak gust
41.9 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
10.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.0 °C
since 1940
+0.2 °C per decade · r² = 0.33 · 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
26.5 °C
1 August 2018
Coldest day
-28.3 °C
10 January 1987
Wettest day
56 mm
26 August 1979
Windiest day
70.9 km/h
2 January 2019
Strongest gust
116.3 km/h
2 January 2019
Hottest feels-like
29.2 °C
1 August 2003
Coldest feels-like
-36.3 °C
10 January 1987
Snowiest day
16.9 cm
21 March 1974
Sunniest day
18.0 h
23 June 2020
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 | 2.2 °C | +2.3 °C | 56 mm | +14 mm |
| Feb | 1.0 °C | +2.4 °C | 14 mm | -17 mm |
| Mar | 4.7 °C | +4.1 °C | 4 mm | -24 mm |
| Apr | 7.3 °C | +2.4 °C | 38 mm | +5 mm |
| May | 9.7 °C | -0.1 °C | 21 mm | -12 mm |
| Jun | 15.3 °C | +0.7 °C | 40 mm | -1 mm |
| Jul | 20.5 °C | +2.1 °C | 59 mm | +8 mm |
| Aug | 17.8 °C | -0.3 °C | 71 mm | +7 mm |
| Sep | 16.3 °C | +2.2 °C | 55 mm | -2 mm |
| Oct | 10.7 °C | +1.8 °C | 65 mm | +9 mm |
| Nov | 6.7 °C | +1.9 °C | 39 mm | -20 mm |
| Dec | 5.7 °C | +3.5 °C | 62 mm | +10 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 Ytterby?
Ytterby has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 6.2 °C and it receives 545 mm of precipitation per year.
What is the hottest day ever recorded in Ytterby?
The hottest day measured in Ytterby between 1940 and 2025 was 1 August 2018, reaching 26.5 °C.
What is the coldest day in Ytterby?
The coldest day measured in Ytterby between 1940 and 2025 was 10 January 1987, at -28.3 °C.
Does it snow in Ytterby?
Yes. Ytterby gets on average 86.5 cm of snow per year and has around 100 frost days.
Has the climate of Ytterby warmed?
Yes: Ytterby warmed by +2.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Ytterby?
The wettest day measured in Ytterby between 1940 and 2025 was 26 August 1979, with 56 mm of rain in 24 hours.
What was the windiest day in Ytterby?
The windiest day measured in Ytterby between 1940 and 2025 was 2 January 2019, with winds reaching 70.9 km/h.
What is the warmest month in Ytterby?
The warmest month in Ytterby is July (16.5 °C on average); the coldest is February (-2.9 °C).
How much does it rain in Ytterby?
Ytterby receives on average 545 mm of precipitation per year, spread over about 116 rainy days.
Is it sunny in Ytterby?
Ytterby 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 Ytterby?
The heaviest 24-hour snowfall measured in Ytterby between 1940 and 2025 was 21 March 1974, with 16.9 cm.
Are there tropical nights in Ytterby?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Ytterby.
What was the most extreme apparent temperature in Ytterby?
In Ytterby, between 1940 and 2025, the highest apparent temperature reached 29.2 °C on 1 August 2003, and the lowest was -36.3 °C on 10 January 1987.
Compare Ytterby with another city
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Nearby cities
The climate around Ytterby