Unaizah climate — normals and trends
Unaizah (Saudi Arabia) has a hot desert climate (BWh) under the Köppen-Geiger classification. Its mean annual temperature is 24.8 °C and it receives 89 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 (34.5 °C on average) and the coldest is January (12.6 °C). Rainfall peaks in November.
Unaizah averages 2 frost days, 215 hot days (≥ 30 °C) and 16 rainy days per year.
Unaizah has warmed by +4.0 °C between 1940 and 2025, or +0.47 °C per decade. This trend is statistically significant.
The number of frost days there went from about 5 to 0 per year over the period.
The hottest day of the period reached 47.2 °C (on 12 July 2021) and the coldest -6.2 °C (on 20 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
UnaizahAl-Qassim Region
- coords
- 26.10°, 44.00°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
24.8°C
Average daily high
31.6°C
Average daily low
17.7°C
Annual rainfall
89mm
Sunshine / day
11.2h
Mean relative humidity
29%
Average peak wind
20.6km/h
Seasonal range
21.9°C
Frost days (< 0 °C)
2 d/yr
Hot days (≥ 30 °C)
215 d/yr
Rainy days (≥ 1 mm)
16 d/yr
Annual snowfall
0.0 cm
Average feels-like high
29.2 °C
Average feels-like low
14.2 °C
Average peak gust
33.7 km/h
Tropical nights (≥ 20 °C)
168 d/yr
Solar radiation
22.5 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+4.0 °C
since 1940
+0.5 °C per decade · r² = 0.79 · 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
47.2 °C
12 July 2021
Coldest day
-6.2 °C
20 January 1964
Wettest day
52 mm
8 November 1997
Windiest day
51.4 km/h
22 April 2010
Strongest gust
86.0 km/h
2 April 2014
Hottest feels-like
48.6 °C
1 August 2020
Coldest feels-like
-11.0 °C
20 January 1964
Snowiest day
0.1 cm
3 February 1967
Sunniest day
12.8 h
29 June 1941
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 | 18.3 °C | -0.6 °C | 11 mm | -3 mm |
| Feb | 19.6 °C | -2.3 °C | 35 mm | +28 mm |
| Mar | 26.1 °C | -0.4 °C | 31 mm | +18 mm |
| Apr | 35.7 °C | +4.0 °C | 2 mm | -12 mm |
| May | 39.9 °C | +2.3 °C | 1 mm | -3 mm |
| Jun | 42.4 °C | +1.8 °C | 0 mm | 0 mm |
| Jul | 42.6 °C | +1.0 °C | 0 mm | 0 mm |
| Aug | 42.9 °C | +1.2 °C | 0 mm | 0 mm |
| Sep | 41.1 °C | +1.8 °C | 0 mm | 0 mm |
| Oct | 35.0 °C | +1.1 °C | 0 mm | -2 mm |
| Nov | 28.0 °C | +2.1 °C | 1 mm | -18 mm |
| Dec | 20.5 °C | +0.4 °C | 49 mm | +33 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 Unaizah?
Unaizah has a hot desert climate (Köppen BWh). Over 1940-2025, the average annual temperature is 24.8 °C and it receives 89 mm of precipitation per year.
What is the hottest day ever recorded in Unaizah?
The hottest day measured in Unaizah between 1940 and 2025 was 12 July 2021, reaching 47.2 °C.
What is the coldest day in Unaizah?
The coldest day measured in Unaizah between 1940 and 2025 was 20 January 1964, at -6.2 °C.
Does it snow in Unaizah?
Almost never: Unaizah sees virtually no snow, with about 2 frost days per year.
Has the climate of Unaizah warmed?
Yes: Unaizah warmed by +4.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Unaizah?
The wettest day measured in Unaizah between 1940 and 2025 was 8 November 1997, with 52 mm of rain in 24 hours.
What was the windiest day in Unaizah?
The windiest day measured in Unaizah between 1940 and 2025 was 22 April 2010, with winds reaching 51.4 km/h.
What is the warmest month in Unaizah?
The warmest month in Unaizah is July (34.5 °C on average); the coldest is January (12.6 °C).
How much does it rain in Unaizah?
Unaizah receives on average 89 mm of precipitation per year, spread over about 16 rainy days.
Is it sunny in Unaizah?
Unaizah gets on average 11.2 hours of sunshine per day, roughly 4,088 hours per year over 1940-2025.
What is the biggest single-day snowfall in Unaizah?
The heaviest 24-hour snowfall measured in Unaizah between 1940 and 2025 was 3 February 1967, with 0.1 cm.
Are there tropical nights in Unaizah?
Yes: Unaizah has on average 168 tropical nights per year (temperature staying above 20 °C), over 1940-2025.
What was the most extreme apparent temperature in Unaizah?
In Unaizah, between 1940 and 2025, the highest apparent temperature reached 48.6 °C on 1 August 2020, and the lowest was -11.0 °C on 20 January 1964.
Compare Unaizah with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Unaizah