Tatvan climate — normals and trends
Tatvan (Republic of Türkiye) has a hot-summer mediterranean continental climate (Dsa) under the Köppen-Geiger classification. Its mean annual temperature is 9.0 °C and it receives 810 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 August (22.5 °C on average) and the coldest is January (-3.9 °C). Rainfall peaks in March.
Tatvan averages 124 frost days, 14 hot days (≥ 30 °C) and 111 rainy days per year.
Tatvan 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 138 to 110 per year over the period.
The hottest day of the period reached 34.3 °C (on 20 July 2021) and the coldest -19.8 °C (on 19 January 1964).
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
TatvanBitlis
- coords
- 38.49°, 42.28°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
9.0°C
Average daily high
13.1°C
Average daily low
4.9°C
Annual rainfall
810mm
Sunshine / day
10.5h
Mean relative humidity
64%
Average peak wind
11.7km/h
Seasonal range
26.4°C
Frost days (< 0 °C)
124 d/yr
Hot days (≥ 30 °C)
14 d/yr
Rainy days (≥ 1 mm)
111 d/yr
Annual snowfall
305.8 cm
Average feels-like high
11.1 °C
Average feels-like low
2.0 °C
Average peak gust
34.2 km/h
Tropical nights (≥ 20 °C)
5 d/yr
Solar radiation
18.3 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
34.3 °C
20 July 2021
Coldest day
-19.8 °C
19 January 1964
Wettest day
61 mm
2 December 1994
Windiest day
35.1 km/h
13 January 1954
Strongest gust
108.0 km/h
29 October 2003
Hottest feels-like
34.8 °C
24 July 2025
Coldest feels-like
-25.7 °C
19 January 1964
Snowiest day
42.4 cm
2 December 1994
Sunniest day
14.1 h
28 June 1940
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 | 2.4 °C | +3.5 °C | 7 mm | -96 mm |
| Feb | -1.0 °C | -1.1 °C | 80 mm | -26 mm |
| Mar | 7.6 °C | +3.7 °C | 71 mm | -53 mm |
| Apr | 11.9 °C | +1.8 °C | 150 mm | +41 mm |
| May | 19.5 °C | +2.8 °C | 71 mm | -9 mm |
| Jun | 25.1 °C | +2.3 °C | 6 mm | -21 mm |
| Jul | 29.6 °C | +1.8 °C | 2 mm | -8 mm |
| Aug | 31.6 °C | +3.6 °C | 0 mm | -6 mm |
| Sep | 24.3 °C | +0.7 °C | 6 mm | -7 mm |
| Oct | 17.4 °C | +1.3 °C | 52 mm | -7 mm |
| Nov | 12.7 °C | +4.6 °C | 36 mm | -45 mm |
| Dec | 3.1 °C | +1.7 °C | 149 mm | +54 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 Tatvan?
Tatvan has a hot-summer mediterranean continental climate (Köppen Dsa). Over 1940-2025, the average annual temperature is 9.0 °C and it receives 810 mm of precipitation per year.
What is the hottest day ever recorded in Tatvan?
The hottest day measured in Tatvan between 1940 and 2025 was 20 July 2021, reaching 34.3 °C.
What is the coldest day in Tatvan?
The coldest day measured in Tatvan between 1940 and 2025 was 19 January 1964, at -19.8 °C.
Does it snow in Tatvan?
Yes. Tatvan gets on average 305.8 cm of snow per year and has around 124 frost days.
Has the climate of Tatvan warmed?
Yes: Tatvan warmed by +1.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Tatvan?
The wettest day measured in Tatvan between 1940 and 2025 was 2 December 1994, with 61 mm of rain in 24 hours.
What was the windiest day in Tatvan?
The windiest day measured in Tatvan between 1940 and 2025 was 13 January 1954, with winds reaching 35.1 km/h.
What is the warmest month in Tatvan?
The warmest month in Tatvan is August (22.5 °C on average); the coldest is January (-3.9 °C).
How much does it rain in Tatvan?
Tatvan receives on average 810 mm of precipitation per year, spread over about 111 rainy days.
Is it sunny in Tatvan?
Tatvan gets on average 10.5 hours of sunshine per day, roughly 3,833 hours per year over 1940-2025.
What is the biggest single-day snowfall in Tatvan?
The heaviest 24-hour snowfall measured in Tatvan between 1940 and 2025 was 2 December 1994, with 42.4 cm.
Are there tropical nights in Tatvan?
Yes: Tatvan has on average 5 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Tatvan?
In Tatvan, between 1940 and 2025, the highest apparent temperature reached 34.8 °C on 24 July 2025, and the lowest was -25.7 °C on 19 January 1964.
Compare Tatvan with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Tatvan