Nisibis climate — normals and trends
Nisibis (Republic of Türkiye) has a hot-summer mediterranean climate (Csa) under the Köppen-Geiger classification. Its mean annual temperature is 18.7 °C and it receives 409 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 (32.8 °C on average) and the coldest is January (5.4 °C). Rainfall peaks in January.
Nisibis averages 26 frost days, 146 hot days (≥ 30 °C) and 60 rainy days per year.
Nisibis has warmed by +1.6 °C between 1940 and 2025, or +0.19 °C per decade. This trend is statistically significant.
The number of frost days there went from about 32 to 20 per year over the period.
The hottest day of the period reached 47.7 °C (on 25 July 2025) and the coldest -14.2 °C (on 8 February 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.
Climate normals · ERA5
NisibisMardin
- coords
- 37.07°, 41.21°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
18.7°C
Average daily high
25.1°C
Average daily low
12.7°C
Annual rainfall
409mm
Sunshine / day
10.7h
Mean relative humidity
49%
Average peak wind
12.1km/h
Seasonal range
27.4°C
Frost days (< 0 °C)
26 d/yr
Hot days (≥ 30 °C)
146 d/yr
Rainy days (≥ 1 mm)
60 d/yr
Annual snowfall
10.2 cm
Average feels-like high
23.9 °C
Average feels-like low
10.4 °C
Average peak gust
27.3 km/h
Tropical nights (≥ 20 °C)
97 d/yr
Solar radiation
18.8 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.6 °C
since 1940
+0.2 °C per decade · r² = 0.22 · 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
47.7 °C
25 July 2025
Coldest day
-14.2 °C
8 February 1950
Wettest day
81 mm
2 April 1980
Windiest day
40.7 km/h
25 December 1963
Strongest gust
86.0 km/h
16 March 1998
Hottest feels-like
48.0 °C
19 July 1953
Coldest feels-like
-19.3 °C
8 February 1950
Snowiest day
15.6 cm
11 December 2013
Sunniest day
14.0 h
18 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 | 15.0 °C | +4.6 °C | 3 mm | -71 mm |
| Feb | 12.1 °C | -0.5 °C | 44 mm | -21 mm |
| Mar | 22.3 °C | +5.6 °C | 12 mm | -55 mm |
| Apr | 25.3 °C | +2.7 °C | 28 mm | -23 mm |
| May | 33.9 °C | +4.6 °C | 6 mm | -17 mm |
| Jun | 38.9 °C | +3.0 °C | 2 mm | -0 mm |
| Jul | 42.5 °C | +2.5 °C | 1 mm | +0 mm |
| Aug | 41.0 °C | +1.6 °C | 0 mm | -0 mm |
| Sep | 35.1 °C | +0.2 °C | 0 mm | -1 mm |
| Oct | 29.0 °C | +1.3 °C | 3 mm | -14 mm |
| Nov | 23.7 °C | +4.6 °C | 22 mm | -19 mm |
| Dec | 13.6 °C | +1.0 °C | 106 mm | +38 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 Nisibis?
Nisibis has a hot-summer mediterranean climate (Köppen Csa). Over 1940-2025, the average annual temperature is 18.7 °C and it receives 409 mm of precipitation per year.
What is the hottest day ever recorded in Nisibis?
The hottest day measured in Nisibis between 1940 and 2025 was 25 July 2025, reaching 47.7 °C.
What is the coldest day in Nisibis?
The coldest day measured in Nisibis between 1940 and 2025 was 8 February 1950, at -14.2 °C.
Does it snow in Nisibis?
Yes. Nisibis gets on average 10.2 cm of snow per year and has around 26 frost days.
Has the climate of Nisibis warmed?
Yes: Nisibis warmed by +1.6 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Nisibis?
The wettest day measured in Nisibis between 1940 and 2025 was 2 April 1980, with 81 mm of rain in 24 hours.
What was the windiest day in Nisibis?
The windiest day measured in Nisibis between 1940 and 2025 was 25 December 1963, with winds reaching 40.7 km/h.
What is the warmest month in Nisibis?
The warmest month in Nisibis is July (32.8 °C on average); the coldest is January (5.4 °C).
How much does it rain in Nisibis?
Nisibis receives on average 409 mm of precipitation per year, spread over about 60 rainy days.
Is it sunny in Nisibis?
Nisibis gets on average 10.7 hours of sunshine per day, roughly 3,905 hours per year over 1940-2025.
What is the biggest single-day snowfall in Nisibis?
The heaviest 24-hour snowfall measured in Nisibis between 1940 and 2025 was 11 December 2013, with 15.6 cm.
Are there tropical nights in Nisibis?
Yes: Nisibis has on average 97 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Nisibis?
In Nisibis, between 1940 and 2025, the highest apparent temperature reached 48.0 °C on 19 July 1953, and the lowest was -19.3 °C on 8 February 1950.
Compare Nisibis with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Nisibis