Ad Dilam weather in December

In December, Ad Dilam sees average daytime highs of 23°C and overnight lows near 11°C, with 8 mm of rain across 1.5 wet days and about 10.5 hours of daylight. It is the 11th-warmest and 2nd-wettest month of the year here.

Highs ease over the month, from about 24°C in the first days to 22°C by the end. The sky is clear or mostly clear about 76% of the time in December, and the air most often feels dry.

Daylight stretches from about 10 h 36 min at the start of December to 10 h 30 min by month's end. Set against the rest of the year, December is Ad Dilam's 9th-clearest and 9th-windiest month. For the whole year in context, see Ad Dilam's year-round climate.

Daytime high
23°
11th warmest
Overnight low
11°
2nd coldest
Rainfall
8 mm
1.5 wet days
Daylight
10 h 30 min
6:32 AM – 5:03 PM
Cloud cover
22%
9th clearest
Wind
11 km/h
9th windiest
Solar energy
4.33 kWh/m²
Travel score
8.9
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 24°C in the first days to 22°C by the end.

A typical December day in Ad Dilam reaches about 23°C in the afternoon and slips back to 11°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 28°C. Set against its neighbours, December runs about 5°C cooler than November and about 1°C warmer than January.

10°15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12513
22513
32413
42412
52412
62412
72412
82412
92412
102312
112311
122311
132311
142311
152311
162311
172311
182311
192210
202210
212210
222210
232210
242210
252210
262210
272210
282210
292210
302210
312210

How December really feels in Ad Dilam

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.

Ad Dilam weather by month

How December compares with the rest of the year at a glance. December is the 11th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan22° / 10°81.710.78.5
Feb24° / 12°71.311.29.1
Mar29° / 16°81.511.87.2
Apr35° / 21°11212.53.5
May40° / 26°10.313.10.4
Jun43° / 28°0013.50.0
Jul44° / 29°0013.30.0
Aug44° / 29°0012.80.0
Sep41° / 25°0012.10.2
Oct35° / 20°10.211.43.2
Nov28° / 15°81.210.87.7
Dec23° / 11°81.510.58.9

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 76% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 9% of December, with mostly cloudy or overcast conditions the remaining 14%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
18713
28713
38713
48713
58713
68614
78614
88515
98515
108515
118416
128416
138416
148515
158416
168416
178416
188416
198515
208515
218515
228614
238614
248713
258614
268713
278713
288713
298614
308614
318614

Chance of precipitation in December

Any precipitation

Ad Dilam gets around 8 mm of rain over 1.5 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 5% and peaks near 7% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
17
27
37
47
56
66
76
86
95
105
115
125
135
145
155
165
175
184
194
204
214
224
234
244
254
264
273
283
293
304
314

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 (%)
19073
29073
39073
49073
59163
69163
79163
89262
99352
109352
119442
129541
139541
149631
159631
169631
179631
189820
199820
209820
219820
229820
239820
249820
259820
269820
279820
289820
299820
309820
319820

Wind in December

Winds average 11 km/h in December.

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

051015151015202531
Wind speed (km/h)Feels
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm
3111calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 10 h 36 min at the start of December to 10 h 30 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 6:22 AM to 6:38 AM, and sunset from 5:00 PM to 5:11 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.66:225:00
210.66:235:00
310.66:245:00
410.66:245:00
510.66:255:00
610.66:265:00
710.66:265:01
810.66:275:01
910.66:285:01
1010.66:285:01
1110.56:295:02
1210.56:295:02
1310.56:305:02
1410.56:315:03
1510.56:315:03
1610.56:325:03
1710.56:325:04
1810.56:335:04
1910.56:335:04
2010.56:345:05
2110.56:345:05
2210.56:355:06
2310.56:355:06
2410.56:365:07
2510.56:365:07
2610.56:375:08
2710.56:375:08
2810.56:375:09
2910.56:385:09
3010.56:385:10
3110.56:385:11

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 4.33 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 4.33 kWh/m² to a high of 7.69 kWh/m² in June across the year — December's 4.33 kWh/m² sits near the bottom.

012345151015202531
Solar energy (kWh/m²)Level
14.4Bright
24.4Bright
34.4Bright
44.4Bright
54.4Bright
64.4Bright
74.3Bright
84.3Bright
94.3Bright
104.3Bright
114.3Bright
124.3Bright
134.3Bright
144.3Bright
154.3Bright
164.3Bright
174.3Bright
184.3Bright
194.3Bright
204.3Bright
214.3Bright
224.3Bright
234.3Bright
244.3Bright
254.3Bright
264.3Bright
274.3Bright
284.3Bright
294.3Bright
304.3Bright
314.3Bright
Planning a trip in December

Hazard calendar for Ad Dilam

In seasonPeak

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

Ad Dilam 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 Ad Dilam?

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

8.9
Sightseeing
2nd-best month of the year
6.7
Beach & pool
6th-best month of the year

December is one of the better times to visit Ad Dilam for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Ad Dilam in December

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

In December, Ad Dilam sees daytime highs around 23°C and nights near 11°C. Worth packing: light clothes.

light clothes

UV index in Ad Dilam in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Ad Dilam peaks around July 20 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 at about 5 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highExtremeVery highHighModerateJul 20UV 11Dec 17UV 5
UV index (midday)Level
Jan6High
Feb7Very high
Mar9Very high
Apr7Very high
May10Very high
Jun9Very high
Jul11Extreme
Aug10Extreme
Sep9Very high
Oct9Very high
Nov6High
Dec4Moderate

Air quality in Ad Dilam 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 Ad Dilam is worst in March — around 72 µg/m³ PM2.5 (unhealthy), about 1.9× the cleanest month (October, 38 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecPoorUnhealthyPoorMar 2372 µg/m³Oct 1539 µg/m³
PM2.5 (µg/m³)Level
Jan51Poor
Feb57Unhealthy
Mar72Unhealthy
Apr71Unhealthy
May68Unhealthy
Jun60Unhealthy
Jul59Unhealthy
Aug52Poor
Sep42Poor
Oct38Poor
Nov44Poor
Dec47Poor
Location & terrain

Where is Ad Dilam?

Ad Dilam sits at 24.0°N, 47.2°E, 453 m above sea level, in Saudi Arabia. The nearest listed city is Al Kharj, 25 km away.

RumāḩLayláShaqra

Topography around Ad Dilam

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

Within 3 km, the terrain around Ad Dilam has only modest variations in elevation — a maximum elevation change of 45 m around an average of 451 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 145 m; within 80 km, large variations in elevation — a maximum elevation change of 804 m.

The land around Ad Dilam is covered by bare terrain (64%) within 3 km, bare terrain (83%) within 16 km, and bare terrain (96%) within 80 km.

3 km
45 m
16 km
145 m
80 km
804 m
treesshrubscroplandartificial surfacesbare terrain
December weather nearby: Al Kharj 25 km · Ḥawṭah Banī Tamīm 62 km · Riyadh 89 km · ‘Irqah 95 km · Ad Dir‘īyah 106 km · Rumāḩ 175 km · Laylá 194 km · Shaqra 238 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 Ad Dilam (23.991°, 47.1618°, elevation 453 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).