Ar Rass weather in May

In May, Ar Rass sees average daytime highs of 38°C and overnight lows near 24°C, with 2 mm of rain across 0.4 wet days and about 13.2 hours of daylight. It is the 5th-warmest and 8th-wettest month of the year here.

Highs climb over the month, from about 36°C in the first days to 40°C by the end. The sky is clear or mostly clear about 74% of the time in May, and the air most often feels dry.

Daylight stretches from about 13 hours at the start of May to 13 h 30 min by month's end. Set against the rest of the year, May is Ar Rass's 7th-clearest and 4th-windiest month. For the whole year in context, see Ar Rass's year-round climate.

Daytime high
38°
5th warmest
Overnight low
24°
8th coldest
Rainfall
2 mm
0.4 wet days
Daylight
13 h 18 min
5:24 AM – 6:40 PM
Cloud cover
25%
7th clearest
Wind
15 km/h
4th windiest
Solar energy
7.68 kWh/m²
Travel score
1.3
out of 10

Ar Rass is human settlement in Saudi Arabia.

Density
1,362/km²
people per km²

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 36°C in the first days to 40°C by the end.

A typical May day in Ar Rass reaches about 38°C in the afternoon and slips back to 24°C overnight — a 14°C spread between the day's warmth and the night's chill. On most days the high lands between 35°C and 41°C. Set against its neighbours, May runs about 6°C warmer than April and about 3°C cooler than June.

20°30°40°151015202531
Avg high (°C)Avg low (°C)
13522
23622
33622
43622
53623
63623
73723
83723
93723
103723
113723
123724
133824
143824
153824
163824
173824
183825
193925
203925
213925
223925
233925
244025
254026
264026
274026
284026
294026
304126
314126

How May really feels in Ar Rass

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
11 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.

Ar Rass weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan20° / 132.410.68.0
Feb23° / 11°61.111.18.9
Mar27° / 14°142.211.88.0
Apr33° / 19°132.712.64.6
May38° / 24°20.413.21.3
Jun42° / 26°0013.60.0
Jul42° / 27°0013.50.0
Aug43° / 28°0012.90.0
Sep40° / 25°00.112.20.3
Oct35° / 21°30.411.43.5
Nov27° / 15°20310.77.8
Dec22° / 10°122.310.48.3

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 74% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 13% of May, with mostly cloudy or overcast conditions the remaining 14%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
18317
28218
38317
48317
58317
68317
78416
88416
98416
108416
118416
128515
138515
148515
158515
168614
178614
188614
198614
208713
218713
228713
238713
248911
258911
268911
279010
28919
29919
30919
31937

Chance of precipitation in May

Any precipitation

Ar Rass gets around 2 mm of rain over 0.4 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 2% and peaks near 5% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
15
25
35
44
54
63
73
82
92
102
112
122
132
142
151
161
171
181
191
201
211
221
231
241
251
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 98% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
19352
29352
39442
49442
59442
69541
79631
89631
99631
109631
119820
129820
139820
149820
159820
169910
179910
189910
199910
209910
219910
229910
239910
2410000
2510000
2610000
2710000
2810000
2910000
3010000
3110000

Wind in May

Winds average 15 km/h in May.

Across May, daily wind ranges from about 15 km/h on the calmest days to 16 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
116light breeze
216light breeze
316light breeze
416light breeze
516light breeze
616light breeze
716light breeze
816light breeze
915light breeze
1015light breeze
1115light breeze
1215light breeze
1315light breeze
1415light breeze
1515light breeze
1615light breeze
1715light breeze
1815light breeze
1915light breeze
2015light breeze
2115light breeze
2215light breeze
2315light breeze
2415light breeze
2515light breeze
2615light breeze
2715light breeze
2815light breeze
2915light breeze
3015light breeze
3115light breeze

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 hours at the start of May to 13 h 30 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 30 minutes over May. Sunrise moves from 5:34 AM to 5:19 AM, and sunset from 6:32 PM to 6:48 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:346:32
213.05:346:33
313.05:336:33
413.05:326:34
513.05:316:34
613.15:316:35
713.15:306:35
813.15:296:36
913.15:296:36
1013.15:286:37
1113.25:276:37
1213.25:276:38
1313.25:266:38
1413.25:266:39
1513.25:256:40
1613.35:246:40
1713.35:246:41
1813.35:236:41
1913.35:236:42
2013.35:226:42
2113.35:226:43
2213.45:226:43
2313.45:216:44
2413.45:216:44
2513.45:216:45
2613.45:206:45
2713.45:206:46
2813.45:206:46
2913.55:196:47
3013.55:196:47
3113.55:196:48

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 7.68 kWh/m².

For context, solar energy here swings from a low near 4.04 kWh/m² to a high of 7.83 kWh/m² in June across the year — May's 7.68 kWh/m² sits near the top of that range.

02468151015202531
Solar energy (kWh/m²)Level
17.4Intense
27.5Intense
37.5Intense
47.5Intense
57.5Intense
67.5Intense
77.5Intense
87.6Intense
97.6Intense
107.6Intense
117.6Intense
127.6Intense
137.7Intense
147.7Intense
157.7Intense
167.7Intense
177.7Intense
187.7Intense
197.7Intense
207.7Intense
217.7Intense
227.8Intense
237.8Intense
247.8Intense
257.8Intense
267.8Intense
277.8Intense
287.8Intense
297.8Intense
307.8Intense
317.8Intense
Planning a trip in May

Hazard calendar for Ar Rass

In seasonPeak

In May, Ar Rass sits inside its dust season. The full year is below, with each hazard's peak months called out.

Ar Rass sees seasonal dust haze (February–September), heaviest in May.

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

Is May a good time to visit Ar Rass?

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

1.3
Sightseeing
8th-best month of the year
4.6
Beach & pool
7th-best month of the year

May is a weaker month for outdoor sightseeing in Ar Rass.

What to pack for Ar Rass in May

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

In May, Ar Rass sees daytime highs around 38°C and nights near 24°C. Pack light clothes and sun protection.

light clothessun protection

UV index in Ar Rass 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 Ar Rass peaks around July 17 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 18 at about 5 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highVery highExtremeVery highHighJul 17UV 12Dec 18UV 5
UV index (midday)Level
Jan6High
Feb7Very high
Mar9Very high
Apr7High
May10Extreme
Jun11Extreme
Jul12Extreme
Aug11Extreme
Sep10Very high
Oct9Very high
Nov6High
Dec5Moderate

Air quality in Ar Rass 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 Ar Rass is worst in March — around 94 µg/m³ PM2.5 (unhealthy), about 2.0× the cleanest month (September, 46 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0306090120JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorUnhealthyMar 1892 µg/m³Sep 1547 µg/m³
PM2.5 (µg/m³)Level
Jan68Unhealthy
Feb78Unhealthy
Mar94Unhealthy
Apr84Unhealthy
May79Unhealthy
Jun52Poor
Jul49Poor
Aug47Poor
Sep46Poor
Oct48Poor
Nov61Unhealthy
Dec68Unhealthy
Location & terrain

Where is Ar Rass?

Ar Rass sits at 25.9°N, 43.5°E, 691 m above sea level, in Saudi Arabia. The nearest listed city is Riyāḑ al Khabrā’, 23 km away.

Topography around Ar Rass

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Ar Rass.

Within 3 km, the terrain around Ar Rass has only modest variations in elevation — a maximum elevation change of 40 m around an average of 689 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 131 m; within 80 km, large variations in elevation — a maximum elevation change of 680 m.

The land around Ar Rass is covered by artificial surfaces (63%) and bare terrain (32%) within 3 km, bare terrain (93%) within 16 km, and bare terrain (93%) within 80 km.

3 km
40 m
16 km
131 m
80 km
680 m
croplandartificial surfacesbare terrain
May weather nearby: Riyāḑ al Khabrā’ 23 km · Al Khabrā’ 26 km · Al Badā’i‘ al Wusţá 27 km · Al Bukayrīyah 34 km · Unaizah 56 km · Buraydah 70 km · ‘Uyūn al Jiwā’ 71 km · Al Mithnab 73 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 Ar Rass (25.8694°, 43.4973°, elevation 691 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).