As Sulayyil weather in May

In May, As Sulayyil sees average daytime highs of 40°C and overnight lows near 26°C, with 2 mm of rain across 0.3 wet days and about 13 hours of daylight. It is the 5th-warmest and 4th-wettest month of the year here.

Highs climb over the month, from about 38°C in the first days to 42°C by the end. The sky is clear or mostly clear about 86% of the time in May, and the air most often feels dry.

Daylight stretches from about 12 h 42 min at the start of May to 13 h 06 min by month's end. Set against the rest of the year, May is As Sulayyil's 6th-clearest and 8th-windiest month. For the whole year in context, see As Sulayyil's year-round climate.

Daytime high
40°
5th warmest
Overnight low
26°
9th coldest
Rainfall
2 mm
0.3 wet days
Daylight
13 hours
5:25 AM – 6:23 PM
Cloud cover
16%
6th clearest
Wind
12 km/h
8th windiest
Solar energy
7.66 kWh/m²
Travel score
0.3
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 May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 38°C in the first days to 42°C by the end.

A typical May day in As Sulayyil reaches about 40°C in the afternoon and slips back to 26°C overnight — a 14°C spread between the day's warmth and the night's chill. On most days the high lands between 38°C and 42°C. Set against its neighbours, May runs about 4°C warmer than April and about 2°C cooler than June.

20°25°30°35°40°45°151015202531
Avg high (°C)Avg low (°C)
13825
23825
33825
43925
53925
63926
73926
83926
93926
104026
114026
124026
134026
144026
154027
164027
174027
184127
194127
204127
214127
224127
234127
244127
254127
264127
274127
284127
294227
304227
314227

How May really feels in As Sulayyil

Once humidity and wind are folded in, May averages 31 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
31
25 feel dangerously hot (≥ 39°C)
Days feeling ≤ C
0
wind chill below the day's low

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

As Sulayyil weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 4th-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 May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 86% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 7% of May, with mostly cloudy or overcast conditions the remaining 7%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
19010
28911
38911
48911
58911
69010
79010
89010
99010
10919
11928
12928
13928
14928
15946
16946
17946
18946
19946
20955
21955
22955
23955
24955
25955
26964
27973
28973
29973
30973
31973

Chance of precipitation in May

Any precipitation

As Sulayyil gets around 2 mm of rain over 0.3 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 1% and peaks near 3% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
13
22
32
42
52
62
72
82
91
101
111
121
131
140
150
160
170
180
190
200
210
220
230
240
250
260
270
280
290
300
310

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the dry band about 96% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
192512
292512
392512
493412
593412
693412
793412
894312
994312
1095311
1195311
1296211
1397201
1498200
1598200
1698200
1798200
1898200
1998200
2098200
2198200
2298200
2398200
2498200
2598200
2698200
2798200
2898200
2997300
3097300
3197300

Wind in May

Winds average 12 km/h in May.

Across May, daily wind ranges from about 11 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1512light breeze
1612light breeze
1712light breeze
1812light breeze
1912light breeze
2012light breeze
2112light breeze
2212light breeze
2312calm
2412calm
2512calm
2612calm
2712calm
2812calm
2911calm
3011calm
3111calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 12 h 42 min at the start of May to 13 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 24 minutes over May. Sunrise moves from 5:33 AM to 5:21 AM, and sunset from 6:17 PM to 6:29 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.75:336:17
212.85:326:17
312.85:316:18
412.85:316:18
512.85:306:19
612.85:306:19
712.85:296:19
812.95:296:20
912.95:286:20
1012.95:286:21
1112.95:276:21
1212.95:276:21
1312.95:266:22
1412.95:266:22
1513.05:256:23
1613.05:256:23
1713.05:246:23
1813.05:246:24
1913.05:246:24
2013.05:236:25
2113.05:236:25
2213.05:236:26
2313.15:236:26
2413.15:226:26
2513.15:226:27
2613.15:226:27
2713.15:226:28
2813.15:216:28
2913.15:216:28
3013.15:216:29
3113.15:216:29

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 7.66 kWh/m² — the sunniest month for solar.

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 — May's 7.66 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
17.5Intense
27.5Intense
37.6Intense
47.6Intense
57.6Intense
67.6Intense
77.6Intense
87.6Intense
97.6Intense
107.6Intense
117.7Intense
127.7Intense
137.7Intense
147.7Intense
157.7Intense
167.7Intense
177.7Intense
187.7Intense
197.7Intense
207.7Intense
217.7Intense
227.7Intense
237.7Intense
247.7Intense
257.7Intense
267.7Intense
277.6Intense
287.6Intense
297.6Intense
307.6Intense
317.6Intense
Planning a trip in May

Hazard calendar for As Sulayyil

In seasonPeak

In May, 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 May a good time to visit As Sulayyil?

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

0.3
Sightseeing
8th-best month of the year
3.1
Beach & pool
8th-best month of the year

May is a weaker month for outdoor sightseeing in As Sulayyil.

What to pack for As Sulayyil in May

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

In May, As Sulayyil sees daytime highs around 40°C and nights near 26°C. Pack light clothes and sun protection.

light clothessun protection

UV index in As Sulayyil in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 10 (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 May

GoodModeratePoorUnhealthyVery unhealthy

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