For each governorate, the number of days a year when the daily maximum exceeded 40, 45 and 50 degrees, the number of days when the heat index (temperature with humidity) exceeded 41 and 54 degrees, and the trend over 31 years.
The national mean is 17.9 days above 45 degrees and 75.1 danger days, rising 3.31 days per decade.
In short
The national mean is 17.9 days a year above 45 degrees and 75.1 danger days.
Days above 45 degrees are rising 3.31 per decade (p-value 0.0009).
The hottest and most heat-stressed governorates are listed in the table.
Who it is for
Public and occupational health, site safety management, climate research and urban planning, and civil defence.
Method: what we add to the raw data
- Daily maximum temperature and relative humidity come from an open global climate archive on a one-degree grid.
- The heat index combines temperature and humidity into one figure expressing felt heat, because humidity stops sweat evaporating and so raises heat load on the body. The equation used is the one standard in meteorology.
- The 41 and 54 degree thresholds are conventional in the heat-stress literature: above 41 is the danger range, above 54 extreme danger.
- Days were counted per point per year, the points densified to finer cells, then averaged per governorate.
- Trend uses the Mann-Kendall test with a Theil-Sen slope, in days per decade.
Product details
| What you get | 1 spatial layer in GeoPackage, 3 GeoTIFF rasters, 3 CSV tables, lyrx and qml symbology for ArcGIS Pro and QGIS, a PNG map at 220 dpi, and an Arabic and English guide |
|---|---|
| Formats | GPKG, GeoTIFF, CSV, lyrx, qml, PNG |
| Coordinate system | WGS 84 (EPSG:4326) |
| Licence | Commercial use allowed for you and the organisation you buy for; no resale or redistribution |
| Delivery | A private download link valid for 24 hours, within 6 hours of payment confirmation |
| Package size | ZIP 1.5 MB |
| Personal data | The product contains no personal data |
Spatial layers
governorates_heat— polygons, 121: Governorates with their heat stress days
Raster files (GeoTIFF)
D126_days_t45.tif— 422 × 321, about 5 km: Days above 45 CD126_days_hi41.tif— 422 × 321, about 5 km: Danger days by heat indexD126_tmax_mean.tif— 422 × 321, about 5 km: Mean daily maximum
Tables
D126_governorates_heat.csv— 121 rows: Heat stress per governorateD126_national_by_year.csv— 31 rows: National mean per yearD126_point_year.csv— 7,068 rows: Long table: each point by year
Limitations
- The source is a reanalysis grid, not station observations: its values are smoother than station measurements, so local records do not appear. This is why the mean number of days above fifty degrees is near zero even though stations have recorded them.
- The climate source grid has cells of about one hundred kilometres, densified here by inverse-distance weighting for display; densifying smooths boundaries, it adds no new observation. It is weakest along the Sarawat escarpment, where a few kilometres separate highland at two thousand metres from Tihama at sea level, both inside one cell.
- The heat index was devised for a humid temperate climate, and its estimate in very hot dry air is less accurate, though still useful for comparing regions and years.
- Thresholds apply to shade temperature; a worker in the sun faces greater stress than these figures describe.
- A governorate mean hides variation inside it, especially between highland and coast in the south-west.
FAQ
- How long does delivery take?
- Up to 6 hours after payment is confirmed.
- How long does the download link last?
- 24 hours, and it is renewed free on request.
- Can I get a refund?
- Digital products are not refundable once downloaded — unless the file is defective or does not match the description, in which case it is replaced or fully refunded.
- What does the licence allow?
- Commercial use is allowed for you and the organisation you buy for; resale or redistribution is not.