Nallıhan climate — normals and trends
Nallıhan (Republic of Türkiye) has a warm-summer mediterranean continental climate (Dsb) under the Köppen-Geiger classification. Its mean annual temperature is 10.5 °C and it receives 505 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 (21.2 °C on average) and the coldest is January (-0.5 °C). Rainfall peaks in December.
Nallıhan averages 90 frost days, 25 hot days (≥ 30 °C) and 102 rainy days per year.
Nallıhan has warmed by +3.0 °C between 1940 and 2025, or +0.35 °C per decade. This trend is statistically significant.
The number of frost days there went from about 109 to 71 per year over the period.
The hottest day of the period reached 40.4 °C (on 28 July 2025) and the coldest -22.8 °C (on 5 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
NallıhanAnkara
- coords
- 40.19°, 31.35°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
10.5°C
Average daily high
16.0°C
Average daily low
5.6°C
Annual rainfall
505mm
Sunshine / day
10.1h
Mean relative humidity
70%
Average peak wind
11.2km/h
Seasonal range
21.7°C
Frost days (< 0 °C)
90 d/yr
Hot days (≥ 30 °C)
25 d/yr
Rainy days (≥ 1 mm)
102 d/yr
Annual snowfall
77.8 cm
Average feels-like high
14.2 °C
Average feels-like low
3.5 °C
Average peak gust
33.4 km/h
Tropical nights (≥ 20 °C)
1 d/yr
Solar radiation
16.4 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+3.0 °C
since 1940
+0.4 °C per decade · r² = 0.64 · 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
40.4 °C
28 July 2025
Coldest day
-22.8 °C
5 January 1942
Wettest day
45 mm
23 December 1986
Windiest day
36.5 km/h
3 April 1979
Strongest gust
103.3 km/h
26 February 1973
Hottest feels-like
40.4 °C
27 July 2012
Coldest feels-like
-27.2 °C
5 January 1942
Snowiest day
18.1 cm
20 November 2001
Sunniest day
14.1 h
24 June 2025
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 | 7.6 °C | +4.6 °C | 45 mm | -13 mm |
| Feb | 4.7 °C | -0.2 °C | 26 mm | -28 mm |
| Mar | 17.0 °C | +7.7 °C | 14 mm | -44 mm |
| Apr | 16.0 °C | +0.9 °C | 82 mm | +23 mm |
| May | 21.9 °C | +1.9 °C | 45 mm | -10 mm |
| Jun | 28.6 °C | +4.5 °C | 7 mm | -31 mm |
| Jul | 33.5 °C | +5.7 °C | 8 mm | -8 mm |
| Aug | 32.0 °C | +3.5 °C | 9 mm | -4 mm |
| Sep | 25.9 °C | +1.5 °C | 19 mm | +1 mm |
| Oct | 17.7 °C | -0.6 °C | 66 mm | +35 mm |
| Nov | 15.3 °C | +4.0 °C | 20 mm | -24 mm |
| Dec | 6.7 °C | +1.5 °C | 48 mm | -15 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 Nallıhan?
Nallıhan has a warm-summer mediterranean continental climate (Köppen Dsb). Over 1940-2025, the average annual temperature is 10.5 °C and it receives 505 mm of precipitation per year.
What is the hottest day ever recorded in Nallıhan?
The hottest day measured in Nallıhan between 1940 and 2025 was 28 July 2025, reaching 40.4 °C.
What is the coldest day in Nallıhan?
The coldest day measured in Nallıhan between 1940 and 2025 was 5 January 1942, at -22.8 °C.
Does it snow in Nallıhan?
Yes. Nallıhan gets on average 77.8 cm of snow per year and has around 90 frost days.
Has the climate of Nallıhan warmed?
Yes: Nallıhan warmed by +3.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Nallıhan?
The wettest day measured in Nallıhan between 1940 and 2025 was 23 December 1986, with 45 mm of rain in 24 hours.
What was the windiest day in Nallıhan?
The windiest day measured in Nallıhan between 1940 and 2025 was 3 April 1979, with winds reaching 36.5 km/h.
What is the warmest month in Nallıhan?
The warmest month in Nallıhan is August (21.2 °C on average); the coldest is January (-0.5 °C).
How much does it rain in Nallıhan?
Nallıhan receives on average 505 mm of precipitation per year, spread over about 102 rainy days.
Is it sunny in Nallıhan?
Nallıhan gets on average 10.1 hours of sunshine per day, roughly 3,687 hours per year over 1940-2025.
What is the biggest single-day snowfall in Nallıhan?
The heaviest 24-hour snowfall measured in Nallıhan between 1940 and 2025 was 20 November 2001, with 18.1 cm.
Are there tropical nights in Nallıhan?
Yes: Nallıhan has on average 1 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Nallıhan?
In Nallıhan, between 1940 and 2025, the highest apparent temperature reached 40.4 °C on 27 July 2012, and the lowest was -27.2 °C on 5 January 1942.
Compare Nallıhan with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Nallıhan