Ar Rass weather in January

In January, Ar Rass sees average daytime highs of 20°C and overnight lows near 8°C, with 13 mm of rain across 2.4 wet days and about 10.6 hours of daylight. It is the 12th-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 20°C through the month. The sky is clear or mostly clear about 69% of the time in January, and the air most often feels dry.

Daylight stretches from about 10 h 24 min at the start of January to 10 h 48 min by month's end. Set against the rest of the year, January is Ar Rass's 11th-clearest and 6th-windiest month. For the whole year in context, see Ar Rass's year-round climate.

Daytime high
20°
12th warmest
Overnight low
1st coldest
Rainfall
13 mm
2.4 wet days
Daylight
10 h 30 min
6:59 AM – 5:32 PM
Cloud cover
29%
11th clearest
Wind
14 km/h
6th windiest
Solar energy
4.29 kWh/m²
Travel score
8.0
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 January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 20°C through the month.

A typical January day in Ar Rass reaches about 20°C in the afternoon and slips back to 8°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 14°C and 26°C. Set against its neighbours, January runs about 2°C cooler than December and about 3°C cooler than February.

10°20°30°151015202531
Avg high (°C)Avg low (°C)
1219
2219
3209
4209
5209
6209
7209
8208
9208
10208
11208
12208
13208
14208
15208
16208
17208
18208
19208
20208
21208
22208
23208
24208
25219
26219
27219
28219
29219
30219
31219

How January really feels in Ar Rass

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.

Ar Rass 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
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 January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 69% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 10% of January, with mostly cloudy or overcast conditions the remaining 21%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17723
27624
37624
47624
57624
67525
77525
87624
97525
107525
117723
127723
137723
147822
157921
167921
177921
188020
198020
208119
218218
228218
238317
248317
258416
268317
278317
288416
298416
308416
318416

Chance of precipitation in January

Any precipitation

Ar Rass gets around 13 mm of rain over 2.4 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 7% and peaks near 10% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
17
28
38
49
59
69
710
810
910
1010
1110
1210
139
149
159
168
178
187
197
207
216
226
235
245
255
265
275
284
294
304
314

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 (%)
1991
2991
3991
4991
5991
6991
7991
8991
9991
10991
11991
12991
13991
14991
15991
16991
17991
18991
19991
20991
21982
22982
23982
24982
25982
26982
27982
28982
29982
30982
31991

Wind in January

Winds average 14 km/h in January.

Across January, daily wind ranges from about 14 km/h on the calmest days to 15 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
2515light breeze
2615light breeze
2715light breeze
2815light breeze
2915light breeze
3015light breeze
3115light breeze

Sunrise & sunset in January

DaylightNight

Daylight runs from about 10 h 24 min at the start of January to 10 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 24 minutes over January. Sunrise moves from 6:57 AM to 6:56 AM, and sunset from 5:21 PM to 5:43 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
110.46:575:21
210.46:575:22
310.46:575:23
410.46:585:23
510.46:585:24
610.46:585:25
710.56:585:25
810.56:585:26
910.56:595:27
1010.56:595:27
1110.56:595:28
1210.56:595:29
1310.56:595:30
1410.56:595:30
1510.56:595:31
1610.56:595:32
1710.66:595:32
1810.66:595:33
1910.66:595:34
2010.66:595:35
2110.66:585:35
2210.66:585:36
2310.66:585:37
2410.76:585:38
2510.76:585:38
2610.76:575:39
2710.76:575:40
2810.76:575:41
2910.76:575:41
3010.86:565:42
3110.86:565:43

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 4.29 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 — January's 4.29 kWh/m² sits near the bottom.

024151015202531
Solar energy (kWh/m²)Level
14.0Bright
24.0Bright
34.0Bright
44.0Bright
54.1Bright
64.1Bright
74.1Bright
84.1Bright
94.1Bright
104.1Bright
114.1Bright
124.2Bright
134.2Bright
144.2Bright
154.2Bright
164.3Bright
174.3Bright
184.3Bright
194.3Bright
204.4Bright
214.4Bright
224.5Bright
234.5Bright
244.5Bright
254.6Bright
264.6Bright
274.7Bright
284.7Bright
294.7Bright
304.8Bright
314.8Bright
Planning a trip in January

Hazard calendar for Ar Rass

In seasonPeak

None of Ar Rass's seasonal hazards are active in January. 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 January a good time to visit Ar Rass?

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

8.0
Sightseeing
3rd-best month of the year
4.4
Beach & pool
8th-best month of the year

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

What to pack for Ar Rass in January

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

In January, Ar Rass sees daytime highs around 20°C and nights near 8°C. Little to plan around — just the basics.

UV index in Ar Rass in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 6 — 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 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 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
January 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).