Ar Rass weather in December

In December, Ar Rass sees average daytime highs of 22°C and overnight lows near 10°C, with 12 mm of rain across 2.3 wet days and about 10.4 hours of daylight. It is the 11th-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 23°C in the first days to 21°C by the end. The sky is clear or mostly clear about 67% of the time in December, and the air most often feels dry.

Daylight stretches from about 10 h 30 min at the start of December to 10 h 24 min by month's end. Set against the rest of the year, December is Ar Rass's 10th-clearest and 7th-windiest month. For the whole year in context, see Ar Rass's year-round climate.

Daytime high
22°
11th warmest
Overnight low
10°
2nd coldest
Rainfall
12 mm
2.3 wet days
Daylight
10 h 24 min
6:50 AM – 5:14 PM
Cloud cover
29%
10th clearest
Wind
14 km/h
7th windiest
Solar energy
4.04 kWh/m²
Travel score
8.3
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 December

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 23°C in the first days to 21°C by the end.

A typical December day in Ar Rass reaches about 22°C in the afternoon and slips back to 10°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 16°C and 27°C. Set against its neighbours, December runs about 5°C cooler than November and about 2°C warmer than January.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
12312
22312
32312
42311
52311
62211
72211
82211
92211
102211
112210
122210
132210
142210
152210
162110
172110
182110
192110
202110
212110
222110
23219
24219
25219
26219
27219
28219
29219
30219
31219

How December really feels in Ar Rass

Once humidity and wind are folded in, December 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

December sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Ar Rass weather by month

How December compares with the rest of the year at a glance. December is the 11th-warmest and 5th-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 December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 67% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 13% of December, with mostly cloudy or overcast conditions the remaining 20%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17822
27822
37921
47921
57921
68020
78020
88020
98218
108218
118218
128218
138317
148317
158218
168218
178218
188218
198119
208119
218119
228119
238119
248119
258119
268020
278020
287921
297822
307822
317723

Chance of precipitation in December

Any precipitation

Ar Rass gets around 12 mm of rain over 2.3 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 8% and peaks near 12% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
112
211
311
411
510
610
79
89
98
108
118
128
138
148
158
168
178
188
197
207
217
227
237
247
257
267
277
287
297
307
317

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the dry band about 95% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
187103
28893
38893
48983
59172
69172
79262
89262
99451
109451
119541
129541
139640
149640
159640
169640
179640
189640
199640
209730
219730
229730
239730
249730
259820
269820
279820
289820
299910
309910
319910

Wind in December

Winds average 14 km/h in December.

Across December, daily wind ranges from about 14 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
114light breeze
214light breeze
314light breeze
414light breeze
514light breeze
614light breeze
714light breeze
814light breeze
914light breeze
1014light breeze
1114light breeze
1214light breeze
1314light breeze
1414light breeze
1514light breeze
1614light breeze
1714light breeze
1814light breeze
1914light breeze
2014light breeze
2114light breeze
2214light breeze
2314light breeze
2414light breeze
2514light breeze
2614light breeze
2714light breeze
2814light breeze
2914light breeze
3014light breeze
3114light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 10 h 30 min at the start of December to 10 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over December. Sunrise moves from 6:41 AM to 6:57 AM, and sunset from 5:11 PM to 5:21 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.56:415:11
210.56:415:11
310.56:425:11
410.56:435:11
510.56:445:11
610.56:445:11
710.46:455:11
810.46:465:12
910.46:465:12
1010.46:475:12
1110.46:475:12
1210.46:485:13
1310.46:495:13
1410.46:495:13
1510.46:505:14
1610.46:505:14
1710.46:515:14
1810.46:525:15
1910.46:525:15
2010.46:535:16
2110.46:535:16
2210.46:545:16
2310.46:545:17
2410.46:545:17
2510.46:555:18
2610.46:555:18
2710.46:565:19
2810.46:565:20
2910.46:565:20
3010.46:575:21
3110.46:575:21

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 4.04 kWh/m² — the year's lowest.

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 — December's 4.04 kWh/m² sits near the bottom.

012345151015202531
Solar energy (kWh/m²)Level
14.1Bright
24.1Bright
34.1Bright
44.1Bright
54.1Bright
64.1Bright
74.1Bright
84.1Bright
94.1Bright
104.1Bright
114.1Bright
124.0Bright
134.0Bright
144.0Bright
154.0Bright
164.0Bright
174.0Bright
184.0Bright
194.0Bright
204.0Bright
214.0Bright
224.0Bright
234.0Bright
244.0Bright
254.0Bright
264.0Bright
274.0Bright
284.0Bright
294.0Bright
304.0Bright
314.0Bright
Planning a trip in December

Hazard calendar for Ar Rass

In seasonPeak

None of Ar Rass's seasonal hazards are active in December. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

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 December a good time to visit Ar Rass?

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

8.3
Sightseeing
2nd-best month of the year
5.5
Beach & pool
6th-best month of the year

December is one of the better times to visit Ar Rass for general sightseeing.

What to pack for Ar Rass in December

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

In December, Ar Rass sees daytime highs around 22°C and nights near 10°C. Little to plan around — just the basics.

UV index in Ar Rass in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 5 — enough to warrant sun protection. 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 December

GoodModeratePoorUnhealthyVery unhealthy

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