Siemiatycze climate — normals and trends
Siemiatycze has a warm-summer humid continental climate, averaging 7.6 °C annually with 638 mm of rain per year.
Climate normals · ERA5
SiemiatyczePodlasie
- coords
- 52.43°, 22.86°
- period
- 1940–2025 · 86 yrs
The normals for this period
The average of every indicator across the whole window: temperature, water, sky, wind and notable days.
Mean daily temperature
7.6°C
Average daily high
11.2°C
Average daily low
3.9°C
Annual rainfall
638mm
Sunshine / day
7.2h
Mean relative humidity
79%
Average peak wind
18.6km/h
Seasonal range
22.2°C
Frost days (< 0 °C)
112 d/yr
Hot days (≥ 30 °C)
4 d/yr
Rainy days (≥ 1 mm)
131 d/yr
Annual snowfall
72.0 cm
Average feels-like high
8.4 °C
Average feels-like low
0.6 °C
Average peak gust
35.7 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
10.5 MJ/m²
Has the climate changed?
What the yearly averages say about warming here, and whether the slope is statistically solid.
+2.5 °C
since 1940
+0.3 °C per decade · r² = 0.43 · 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).
Climate month by month
How an average year unfolds: when it rains, when it turns hot, when the sun is out.
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
The most extreme days ever measured here, then the year-by-year detail.
Hottest day
35.5 °C
8 August 2015
Coldest day
-34.3 °C
12 January 1950
Wettest day
51 mm
4 August 1972
Windiest day
52.9 km/h
3 November 1981
Strongest gust
112.7 km/h
7 March 1983
Hottest feels-like
36.2 °C
11 July 2024
Coldest feels-like
-39.8 °C
12 January 1950
Snowiest day
15.2 cm
30 January 1979
Sunniest day
15.8 h
18 June 2021
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and compare it with the normal: warmer, drier, more extreme?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 4.1 °C | +5.6 °C | 39 mm | -1 mm |
| Feb | 1.4 °C | +1.6 °C | 15 mm | -24 mm |
| Mar | 11.5 °C | +6.7 °C | 29 mm | -8 mm |
| Apr | 16.5 °C | +4.4 °C | 25 mm | -25 mm |
| May | 16.1 °C | -1.8 °C | 73 mm | +12 mm |
| Jun | 23.0 °C | +1.7 °C | 58 mm | -16 mm |
| Jul | 24.4 °C | +1.4 °C | 115 mm | +35 mm |
| Aug | 24.7 °C | +2.0 °C | 29 mm | -41 mm |
| Sep | 20.9 °C | +3.2 °C | 50 mm | -5 mm |
| Oct | 11.3 °C | -0.2 °C | 62 mm | +18 mm |
| Nov | 6.2 °C | +1.4 °C | 44 mm | -2 mm |
| Dec | 3.5 °C | +2.8 °C | 21 mm | -23 mm |
The year's extremes
What was the weather like that day?
The weather actually measured on a given date, anywhere in the covered window.
Climate at a glance
What these normals say about the place, in a few sentences, and the notions needed to read them.
Siemiatycze (Poland) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 7.6 °C and it receives 638 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 (18.5 °C on average) and the coldest is January (-3.7 °C). Rainfall peaks in July.
Siemiatycze averages 112 frost days, 4 hot days (≥ 30 °C) and 131 rainy days per year.
Siemiatycze has warmed by +2.5 °C between 1940 and 2025, or +0.30 °C per decade. This trend is statistically significant.
The number of frost days there went from about 130 to 94 per year over the period.
The hottest day of the period reached 35.5 °C (on 8 August 2015) and the coldest -34.3 °C (on 12 January 1950).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Compare Siemiatycze with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Siemiatycze
Other cities — Poland
Frequently asked questions
What is the climate of Siemiatycze?
Siemiatycze has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 7.6 °C and it receives 638 mm of precipitation per year.
What is the hottest day ever recorded in Siemiatycze?
The hottest day measured in Siemiatycze between 1940 and 2025 was 8 August 2015, reaching 35.5 °C.
What is the coldest day in Siemiatycze?
The coldest day measured in Siemiatycze between 1940 and 2025 was 12 January 1950, at -34.3 °C.
Does it snow in Siemiatycze?
Yes. Siemiatycze gets on average 72.0 cm of snow per year and has around 112 frost days.
Has the climate of Siemiatycze warmed?
Yes: Siemiatycze warmed by +2.5 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Siemiatycze?
The wettest day measured in Siemiatycze between 1940 and 2025 was 4 August 1972, with 51 mm of rain in 24 hours.
What was the windiest day in Siemiatycze?
The windiest day measured in Siemiatycze between 1940 and 2025 was 3 November 1981, with winds reaching 52.9 km/h.
What is the warmest month in Siemiatycze?
The warmest month in Siemiatycze is July (18.5 °C on average); the coldest is January (-3.7 °C).
How much does it rain in Siemiatycze?
Siemiatycze receives on average 638 mm of precipitation per year, spread over about 131 rainy days.
Is it sunny in Siemiatycze?
Siemiatycze gets on average 7.2 hours of sunshine per day, roughly 2,628 hours per year over 1940-2025.
What is the biggest single-day snowfall in Siemiatycze?
The heaviest 24-hour snowfall measured in Siemiatycze between 1940 and 2025 was 30 January 1979, with 15.2 cm.
Are there tropical nights in Siemiatycze?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Siemiatycze.
What was the most extreme apparent temperature in Siemiatycze?
In Siemiatycze, between 1940 and 2025, the highest apparent temperature reached 36.2 °C on 11 July 2024, and the lowest was -39.8 °C on 12 January 1950.
These forecasts and records come from our own weather API. Developer documentation →