As Sulayyil in Fall

In fall (September, October and November), As Sulayyil sees average daytime highs around 35°C and overnight lows near 21°C, with 2 mm of rain over about 0 wet days across the season. It is the 3rd-warmest season and the 3rd-wettest season.

Over the season highs ease from about 42°C in early September to 27°C by late November. The sky is clear or mostly clear about 90% of the time across fall, and the air most often feels dry.

Fall is As Sulayyil's 2nd-best season to visit on our travel score. For the whole year in context, see As Sulayyil's year-round climate.

Avg daytime high
35°C
3rd-warmest season
Avg overnight low
21°C
Rainfall
2 mm
0 wet days
Avg wind
11 km/h
Travel score
3.7
2nd-best season
Months
Sep · Oct · Nov

Temperature in As Sulayyil in Fall

Average highAverage lowShaded bands: 10–90% of days

Over the season highs ease from about 42°C in early September to 27°C by late November.

A typical fall day in As Sulayyil reaches about 35°C and drops to 21°C overnight. The warmest of the three months is September, the coolest November.

10°20°30°40°SepOctNov

How fall really feels in As Sulayyil

Once humidity and wind are folded in, fall brings about 62 days that feel above 32°C and 0 that feel at or below 0°C.

Days feeling ≥ 32°C
62
24 feel dangerously hot (≥ 39°C)
Days feeling ≤ C
0
wind chill below the day's low

The story in fall is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

As Sulayyil weather by month

How the three fall months (September, October and November) compare with the rest of the year — the season's months are highlighted.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan24° / 11°30.810.99.3
Feb27° / 14°10.411.38.7
Mar31° / 18°51.111.95.7
Apr36° / 23°61.212.52.7
May40° / 26°20.3130.3
Jun43° / 28°0013.20.0
Jul43° / 30°0013.10.0
Aug43° / 29°0012.70.0
Sep40° / 26°0012.10.3
Oct35° / 21°10.111.53.5
Nov29° / 16°10.2117.4
Dec25° / 12°00.210.89.4

Cloud cover in Fall

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 90% of the time across fall.

0%25%50%75%100%SepOctNov

Chance of precipitation in Fall

Any precipitation

As Sulayyil gets around 2 mm of rain over 0 wet days across fall. The line is the day-by-day chance of measurable precipitation.

0%10%20%30%SepOctNov

Humidity in Fall

DryComfortableHumidMuggyOppressiveMiserable

Most of fall feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

0%25%50%75%100%SepOctNov

Wind in Fall

Winds average 11 km/h across fall.

051015SepOctNov

Sunrise & sunset in Fall

DaylightNight

Daylight runs from about 12 h 24 min in early September to 10 h 54 min by late November. The lit band spans sunrise to sunset each day.

12 AM4 AM8 AM12 PM4 PM8 PM12 AMSepOctNov

Solar energy in Fall

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day across fall, about 6.1 kWh/m².

0246SepOctNov
Planning a trip in fall

Hazard calendar for As Sulayyil

In seasonPeak

In fall, 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.

Dust
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is fall a good time to visit As Sulayyil?

Our two travel scores rate fall for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.

3.7
Sightseeing
2nd-best month of the year
6.5
Beach & pool
2nd-best month of the year

fall is a weaker month for outdoor sightseeing in As Sulayyil. The water and warmth also suit a beach or pool day.

What to pack for As Sulayyil in Fall

From fall's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In fall, As Sulayyil sees daytime highs around 35°C and nights near 21°C. Pack light clothes and sun protection.

light clothessun protection

UV index in As Sulayyil in Fall

LowModerateHighVery highExtreme

Clear-sky midday UV across fall averages around 8 (very high — sun protection essential). 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeExtremeVery highHighApr 14UV 12Dec 15UV 5
UV index (midday)Level
Jan8Very high
Feb9Very high
Mar11Extreme
Apr12Extreme
May10Very high
Jun12Extreme
Jul10Extreme
Aug11Extreme
Sep7Very high
Oct10Very high
Nov7High
Dec5Moderate

Air quality in As Sulayyil in Fall

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where fall 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).

0306090120JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorUnhealthyMar 19108 µg/m³Oct 1342 µg/m³
PM2.5 (µg/m³)Level
Jan77Unhealthy
Feb94Unhealthy
Mar110Unhealthy
Apr101Unhealthy
May82Unhealthy
Jun64Unhealthy
Jul77Unhealthy
Aug69Unhealthy
Sep47Poor
Oct41Poor
Nov57Unhealthy
Dec65Unhealthy
Location & terrain

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.

LayláRanyahQal‘at BīshahAl Mash‘ilīyahḤawṭah Banī TamīmNajranSarāt ‘AbīdahKhamis Mushait

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.

3 km
40 m
16 km
123 m
80 km
428 m
treescroplandartificial surfacesbare terrain
Fall weather nearby: Laylá 236 km · Ranyah 297 km · Qal‘at Bīshah 314 km · Al Mash‘ilīyah 323 km · Ḥawṭah Banī Tamīm 363 km · Najran 363 km · Sarāt ‘Abīdah 368 km · Khamis Mushait 383 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.