Jājarm climate — normals and trends
Jājarm (Iran) has a cold semi-arid climate (BSk) under the Köppen-Geiger classification. Its mean annual temperature is 14.4 °C and it receives 148 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 (27.3 °C on average) and the coldest is January (1.2 °C). Rainfall peaks in March.
Jājarm averages 76 frost days, 97 hot days (≥ 30 °C) and 34 rainy days per year.
Jājarm has warmed by +3.0 °C between 1940 and 2025, or +0.36 °C per decade. This trend is statistically significant.
The number of frost days there went from about 95 to 57 per year over the period.
The hottest day of the period reached 42.4 °C (on 28 June 2022) and the coldest -22.8 °C (on 21 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
JājarmNorth Khorasan
- coords
- 36.95°, 56.38°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
14.4°C
Average daily high
20.5°C
Average daily low
8.6°C
Annual rainfall
148mm
Sunshine / day
10.8h
Mean relative humidity
53%
Average peak wind
15.3km/h
Seasonal range
26.1°C
Frost days (< 0 °C)
76 d/yr
Hot days (≥ 30 °C)
97 d/yr
Rainy days (≥ 1 mm)
34 d/yr
Annual snowfall
18.0 cm
Average feels-like high
18.2 °C
Average feels-like low
6.1 °C
Average peak gust
32.4 km/h
Tropical nights (≥ 20 °C)
39 d/yr
Solar radiation
19.0 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+3.0 °C
since 1940
+0.4 °C per decade · r² = 0.49 · 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
42.4 °C
28 June 2022
Coldest day
-22.8 °C
21 January 1964
Wettest day
33 mm
18 March 2019
Windiest day
39.8 km/h
1 April 1946
Strongest gust
81.4 km/h
16 April 1980
Hottest feels-like
42.1 °C
17 July 2003
Coldest feels-like
-27.8 °C
21 January 1964
Snowiest day
12.6 cm
25 January 1974
Sunniest day
14.0 h
3 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 | 9.7 °C | +3.8 °C | 1 mm | -18 mm |
| Feb | 8.4 °C | +0.3 °C | 12 mm | -10 mm |
| Mar | 17.6 °C | +4.2 °C | 13 mm | -19 mm |
| Apr | 26.1 °C | +5.6 °C | 6 mm | -16 mm |
| May | 31.1 °C | +4.6 °C | 0 mm | -12 mm |
| Jun | 32.0 °C | +0.3 °C | 2 mm | -1 mm |
| Jul | 36.0 °C | +1.8 °C | 0 mm | -2 mm |
| Aug | 35.2 °C | +2.1 °C | 1 mm | -0 mm |
| Sep | 30.6 °C | +1.5 °C | 1 mm | -1 mm |
| Oct | 25.9 °C | +3.9 °C | 0 mm | -6 mm |
| Nov | 18.0 °C | +4.1 °C | 0 mm | -11 mm |
| Dec | 9.7 °C | +1.9 °C | 25 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 Jājarm?
Jājarm has a cold semi-arid climate (Köppen BSk). Over 1940-2025, the average annual temperature is 14.4 °C and it receives 148 mm of precipitation per year.
What is the hottest day ever recorded in Jājarm?
The hottest day measured in Jājarm between 1940 and 2025 was 28 June 2022, reaching 42.4 °C.
What is the coldest day in Jājarm?
The coldest day measured in Jājarm between 1940 and 2025 was 21 January 1964, at -22.8 °C.
Does it snow in Jājarm?
Yes. Jājarm gets on average 18.0 cm of snow per year and has around 76 frost days.
Has the climate of Jājarm warmed?
Yes: Jājarm warmed by +3.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Jājarm?
The wettest day measured in Jājarm between 1940 and 2025 was 18 March 2019, with 33 mm of rain in 24 hours.
What was the windiest day in Jājarm?
The windiest day measured in Jājarm between 1940 and 2025 was 1 April 1946, with winds reaching 39.8 km/h.
What is the warmest month in Jājarm?
The warmest month in Jājarm is July (27.3 °C on average); the coldest is January (1.2 °C).
How much does it rain in Jājarm?
Jājarm receives on average 148 mm of precipitation per year, spread over about 34 rainy days.
Is it sunny in Jājarm?
Jājarm gets on average 10.8 hours of sunshine per day, roughly 3,942 hours per year over 1940-2025.
What is the biggest single-day snowfall in Jājarm?
The heaviest 24-hour snowfall measured in Jājarm between 1940 and 2025 was 25 January 1974, with 12.6 cm.
Are there tropical nights in Jājarm?
Yes: Jājarm has on average 39 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Jājarm?
In Jājarm, between 1940 and 2025, the highest apparent temperature reached 42.1 °C on 17 July 2003, and the lowest was -27.8 °C on 21 January 1964.
Compare Jājarm with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Jājarm