As Sulayyil in Winter
In winter (December, January and February), As Sulayyil sees average daytime highs around 25°C and overnight lows near 12°C, with 5 mm of rain over about 1 wet days across the season. It is the coldest season of the year and the 2nd-wettest season.
Over the season highs climb from about 26°C in early December to 29°C by late February. The sky is clear or mostly clear about 84% of the time across winter, and the air most often feels dry.
Winter is As Sulayyil's best season of the year to visit on our travel score. For the whole year in context, see As Sulayyil's year-round climate.
- Avg daytime high
- 25°C
- coldest season of the year
- Avg overnight low
- 12°C
- Rainfall
- 5 mm
- 1 wet days
- Avg wind
- 13 km/h
- Travel score
- 9.1
- best season of the year
- Months
- Dec · Jan · Feb
Temperature in As Sulayyil in Winter
Over the season highs climb from about 26°C in early December to 29°C by late February.
A typical winter day in As Sulayyil reaches about 25°C and drops to 12°C overnight. The warmest of the three months is February, the coolest January.
How winter really feels in As Sulayyil
Once humidity and wind are folded in, winter brings about 0 days that feel above 32°C and 0 that feel at or below 0°C.
winter sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
As Sulayyil weather by month
How the three winter months (December, January and February) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 24° / 11° | 3 | 0.8 | 10.9 | 9.3 |
| Feb | 27° / 14° | 1 | 0.4 | 11.3 | 8.7 |
| Mar | 31° / 18° | 5 | 1.1 | 11.9 | 5.7 |
| Apr | 36° / 23° | 6 | 1.2 | 12.5 | 2.7 |
| May | 40° / 26° | 2 | 0.3 | 13 | 0.3 |
| Jun | 43° / 28° | 0 | 0 | 13.2 | 0.0 |
| Jul | 43° / 30° | 0 | 0 | 13.1 | 0.0 |
| Aug | 43° / 29° | 0 | 0 | 12.7 | 0.0 |
| Sep | 40° / 26° | 0 | 0 | 12.1 | 0.3 |
| Oct | 35° / 21° | 1 | 0.1 | 11.5 | 3.5 |
| Nov | 29° / 16° | 1 | 0.2 | 11 | 7.4 |
| Dec | 25° / 12° | 0 | 0.2 | 10.8 | 9.4 |
Cloud cover in Winter
The sky is clear or mostly clear about 84% of the time across winter.
Chance of precipitation in Winter
As Sulayyil gets around 5 mm of rain over 1 wet days across winter. The line is the day-by-day chance of measurable precipitation.
Humidity in Winter
Most of winter feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Winter
Winds average 13 km/h across winter.
Sunrise & sunset in Winter
Daylight runs from about 10 h 48 min in early December to 11 h 30 min by late February. The lit band spans sunrise to sunset each day.
Solar energy in Winter
Average shortwave solar energy reaching the ground each day across winter, about 5.3 kWh/m².
Hazard calendar for As Sulayyil
In winter, As Sulayyil overlaps its dust season. The full year is below, with each hazard's peak months called out.
As Sulayyil sees seasonal dust haze (January–September), heaviest in July.
Is winter a good time to visit As Sulayyil?
Our two travel scores rate winter for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
winter is one of the better times to visit As Sulayyil for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for As Sulayyil in Winter
From winter's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In winter, As Sulayyil sees daytime highs around 25°C and nights near 12°C. Pack light clothes. Worth having: sun protection.
UV index in As Sulayyil in Winter
Clear-sky midday UV across winter averages around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in As Sulayyil peaks around April 14 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 5 (high).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 8 | 9 | 11 | 12 | 10 | 12 | 10 | 11 | 7 | 10 | 7 | 5 |
| Level | Very high | Very high | Extreme | Extreme | Very high | Extreme | Extreme | Extreme | Very high | Very high | High | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 8 | Very high |
| Feb | 9 | Very high |
| Mar | 11 | Extreme |
| Apr | 12 | Extreme |
| May | 10 | Very high |
| Jun | 12 | Extreme |
| Jul | 10 | Extreme |
| Aug | 11 | Extreme |
| Sep | 7 | Very high |
| Oct | 10 | Very high |
| Nov | 7 | High |
| Dec | 5 | Moderate |
Air quality in As Sulayyil in Winter
Average fine-particle pollution (PM2.5) through the year — so you can see where winter falls, not just the annual average.
Air quality in As Sulayyil is worst in March — around 110 µg/m³ PM2.5 (unhealthy), about 2.7× the cleanest month (October, 41 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 77 | 94 | 110 | 101 | 82 | 64 | 77 | 69 | 47 | 41 | 57 | 65 |
| Level | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Unhealthy | Poor | Poor | Unhealthy | Unhealthy |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 77 | Unhealthy |
| Feb | 94 | Unhealthy |
| Mar | 110 | Unhealthy |
| Apr | 101 | Unhealthy |
| May | 82 | Unhealthy |
| Jun | 64 | Unhealthy |
| Jul | 77 | Unhealthy |
| Aug | 69 | Unhealthy |
| Sep | 47 | Poor |
| Oct | 41 | Poor |
| Nov | 57 | Unhealthy |
| Dec | 65 | Unhealthy |
Where is As Sulayyil?
As Sulayyil sits at 20.5°N, 45.6°E, 606 m above sea level, in Saudi Arabia. The nearest listed city is Laylá, 236 km away.
Topography around As Sulayyil
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of As Sulayyil.
Within 3 km, the terrain around As Sulayyil has only modest variations in elevation — a maximum elevation change of 40 m around an average of 606 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 123 m; within 80 km, significant variations in elevation — a maximum elevation change of 428 m.
The land around As Sulayyil is covered by bare terrain (67%) and artificial surfaces (25%) within 3 km, bare terrain (94%) within 16 km, and bare terrain (97%) within 80 km.
Saudi Arabia travel facts
- Travel advisory
- Level 3
- Reconsider Travel
- Power plugs
- Type G
- 230 V · 60 Hz
- Prices
- ≈ 47% of US
- price level, 2025
- GDP per capita
- $34,537
- 2025
- Happiness
- 6.8 / 10
- World Happiness, 2025
- Homicide rate
- 0.9
- per 100k, 2019
- Road deaths
- 35.9
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- Very low
- EF EPI 404
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for As Sulayyil (20.4607°, 45.5779°, elevation 606 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.