As Sulayyil weather in January

In January, As Sulayyil sees average daytime highs of 24°C and overnight lows near 11°C, with 3 mm of rain across 0.8 wet days and about 10.9 hours of daylight. It is the 12th-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 24°C through the month. The sky is clear or mostly clear about 82% of the time in January, and the air most often feels dry.

Daylight stretches from about 10 h 48 min at the start of January to 11 h 06 min by month's end. Set against the rest of the year, January is As Sulayyil's 9th-clearest and 5th-windiest month. For the whole year in context, see As Sulayyil's year-round climate.

Daytime high
24°
12th warmest
Overnight low
11°
1st coldest
Rainfall
3 mm
0.8 wet days
Daylight
10 h 54 min
6:40 AM – 5:34 PM
Cloud cover
19%
9th clearest
Wind
13 km/h
5th windiest
Solar energy
5 kWh/m²
Travel score
9.3
out of 10

As Sulayyil is human settlement in Saudi Arabia.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 24°C through the month.

A typical January day in As Sulayyil reaches about 24°C in the afternoon and slips back to 11°C overnight — a 13°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 29°C. Set against its neighbours, January runs about 1°C cooler than December and about 3°C cooler than February.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
12411
22411
32411
42411
52411
62411
72411
82411
92311
102311
112311
122311
132311
142311
152311
162311
172311
182311
192311
202411
212411
222411
232411
242411
252411
262412
272412
282512
292512
302512
312512

How January really feels in As Sulayyil

Once humidity and wind are folded in, January averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

January 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 January compares with the rest of the year at a glance. January is the 12th-warmest and 3rd-wettest month here — the current month is highlighted below.

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 January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 82% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 7% of January, with mostly cloudy or overcast conditions the remaining 11%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
19010
29010
39010
48812
58812
68812
78713
88713
98713
108614
118614
128614
138614
148614
158713
168713
178713
188812
198812
208911
218911
229010
23919
24919
25919
26937
27937
28937
29946
30946
31955

Chance of precipitation in January

Any precipitation

As Sulayyil gets around 3 mm of rain over 0.8 wet days in January. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 3% and peaks near 4% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
11
21
32
42
52
62
72
82
93
103
113
123
133
144
154
164
174
184
193
203
213
223
233
243
252
262
272
282
292
302
311

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, January lands in the dry band about 99% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)
11000
21000
31000
41000
51000
61000
71000
81000
91000
101000
111000
121000
131000
141000
151000
16991
17991
18991
19991
20991
21991
22991
23991
24991
25991
26991
27991
28991
29991
30991
31991

Wind in January

Winds average 13 km/h in January.

Across January, daily wind ranges from about 12 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
112light breeze
212light breeze
312light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3014light breeze
3114light breeze

Sunrise & sunset in January

DaylightNight

Daylight runs from about 10 h 48 min at the start of January to 11 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 18 minutes over January. Sunrise moves from 6:37 AM to 6:39 AM, and sunset from 5:24 PM to 5:43 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.86:375:24
210.86:385:25
310.86:385:25
410.86:385:26
510.86:395:27
610.86:395:27
710.86:395:28
810.86:395:28
910.86:405:29
1010.86:405:30
1110.86:405:30
1210.86:405:31
1310.96:405:32
1410.96:405:32
1510.96:405:33
1610.96:405:34
1710.96:405:34
1810.96:415:35
1910.96:415:35
2010.96:415:36
2110.96:405:37
2210.96:405:37
2311.06:405:38
2411.06:405:39
2511.06:405:39
2611.06:405:40
2711.06:405:41
2811.06:405:41
2911.06:395:42
3011.16:395:42
3111.16:395:43

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 5 kWh/m².

For context, solar energy here swings from a low near 4.96 kWh/m² to a high of 7.66 kWh/m² in May across the year — January's 5 kWh/m² sits near the bottom.

0246151015202531
Solar energy (kWh/m²)Level
14.9Bright
24.9Bright
34.9Bright
44.9Bright
54.9Bright
64.9Bright
74.9Bright
84.9Bright
94.9Bright
104.9Bright
114.9Bright
124.9Bright
134.9Bright
144.9Bright
155.0Bright
165.0Bright
175.0Bright
185.0Bright
195.0Bright
205.0Bright
215.0Bright
225.1Bright
235.1Bright
245.1Bright
255.2Bright
265.2Bright
275.2Bright
285.3Bright
295.3Bright
305.3Bright
315.4Bright
Planning a trip in January

Hazard calendar for As Sulayyil

In seasonPeak

In January, As Sulayyil sits inside 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 January a good time to visit As Sulayyil?

Our two travel scores rate January for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

9.3
Sightseeing
2nd-best month of the year
7.6
Beach & pool
5th-best month of the year

January 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 January

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

In January, As Sulayyil sees daytime highs around 24°C and nights near 11°C. Worth packing: light clothes and sun protection.

light clothessun protection

UV index in As Sulayyil in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 8 — 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.

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 January

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where January 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
January 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. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).