Arvayheer weather in January

In January, Arvayheer sees average daytime highs of -10°C and overnight lows near -22°C, with 1 mm of precipitation across 0.3 wet days and about 8.8 hours of daylight. It is the 12th-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near -10°C through the month. The sky is clear or mostly clear about 66% of the time in January, and the air most often feels dry.

Daylight stretches from about 8 h 30 min at the start of January to 9 h 18 min by month's end. Set against the rest of the year, January is Arvayheer's 1st-clearest and 12th-windiest month. For the whole year in context, see Arvayheer's year-round climate.

Daytime high
-10°
12th warmest
Overnight low
-22°
1st coldest
Precipitation
1 mm
0.3 wet days
Daylight
8 h 48 min
8:54 AM – 5:42 PM
Cloud cover
30%
1st clearest
Wind
10 km/h
12th windiest
Solar energy
2.12 kWh/m²
Travel score
0.0
out of 10

Arvayheer is main settlement in the district of the same name.

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 -10°C through the month.

A typical January day in Arvayheer reaches about -10°C in the afternoon and slips back to -22°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between -17°C and -3°C. Set against its neighbours, January runs about 2°C cooler than December and about 4°C cooler than February.

-30°-20°-10°151015202531
Avg high (°C)Avg low (°C)
1-10-21
2-10-21
3-10-21
4-10-21
5-10-21
6-10-21
7-10-21
8-10-21
9-10-22
10-10-22
11-10-22
12-10-22
13-10-22
14-10-22
15-10-22
16-10-22
17-10-22
18-10-22
19-10-22
20-10-22
21-10-22
22-10-22
23-10-22
24-10-22
25-10-22
26-10-22
27-9-22
28-9-22
29-9-22
30-9-22
31-9-22

How January really feels in Arvayheer

Once humidity and wind are folded in, January averages 0 days that feel above 32°C and 31 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
31
31 feel bitter (≤ -10°C)

The story in January is cold — wind chill drags the overnight "feels like" below the raw low.

Arvayheer weather by month

How January compares with the rest of the year at a glance. January is the 12th-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan-10° / -22°10.30.88.80.0
Feb-6° / -19°30.91.2100.0
Mar / -12°72.22.911.60.0
Apr / -4°1343.113.32.2
May16° / 275.92.114.75.3
Jun21° / 438.40.215.56.6
Jul23° / 12°6211015.26.6
Aug21° / 10°5090.1146.7
Sep16° / 235.21.112.35.6
Oct / -5°102.72.510.71.7
Nov-2° / -13°41.21.79.20.0
Dec-8° / -19°20.40.98.50.0

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 66% of the time in January, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 12% of January, with mostly cloudy or overcast conditions the remaining 21%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
17921
27921
38020
47921
57921
67921
77921
87921
97822
107822
117921
127822
137822
147822
157822
167822
177822
187822
197822
207822
217822
227921
237921
247921
257921
267921
277921
287921
297921
307822
317822

Chance of precipitation in January

Any precipitationSnow

Arvayheer gets around 1 mm of rain and snow over 0.3 wet days in January, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 1% and peaks near 2% on the wettest days, and about 1 day brings snow.

0%10%20%30%151015202531
Rain chance (%)Snow chance (%)
124
223
323
423
513
613
713
813
913
1013
1113
1212
1312
1412
1512
1612
1712
1812
1912
2012
2112
2212
2312
2412
2512
2612
2712
2812
2912
3012
3112

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 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)
1100
2100
3100
4100
5100
6100
7100
8100
9100
10100
11100
12100
13100
14100
15100
16100
17100
18100
19100
20100
21100
22100
23100
24100
25100
26100
27100
28100
29100
30100
31100

Wind in January

Winds average 10 km/h in January, the calmest month.

Across January, daily wind ranges from about 9 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
110calm
210calm
310calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm
3110calm

Sunrise & sunset in January

DaylightNight

Daylight runs from about 8 h 30 min at the start of January to 9 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 48 minutes over January. Sunrise moves from 8:58 AM to 8:42 AM, and sunset from 5:26 PM to 6:02 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
18.58:585:26
28.58:585:27
38.58:585:28
48.58:585:29
58.58:585:30
68.68:585:31
78.68:585:32
88.68:575:33
98.68:575:34
108.68:575:35
118.78:575:36
128.78:565:37
138.78:565:38
148.78:555:40
158.88:555:41
168.88:545:42
178.88:545:43
188.98:535:45
198.98:535:46
208.98:525:47
219.08:515:48
229.08:505:50
239.08:505:51
249.18:495:52
259.18:485:54
269.18:475:55
279.28:465:57
289.28:455:58
299.38:445:59
309.38:436:01
319.38:426:02

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 2.12 kWh/m².

For context, solar energy here swings from a low near 1.71 kWh/m² to a high of 6.65 kWh/m² in June across the year — January's 2.12 kWh/m² sits near the bottom.

0123151015202531
Solar energy (kWh/m²)Level
11.8Dim
21.8Dim
31.8Dim
41.8Dim
51.9Dim
61.9Dim
71.9Dim
81.9Dim
91.9Dim
101.9Dim
112.0Dim
122.0Moderate
132.0Moderate
142.0Moderate
152.1Moderate
162.1Moderate
172.1Moderate
182.2Moderate
192.2Moderate
202.2Moderate
212.3Moderate
222.3Moderate
232.3Moderate
242.4Moderate
252.4Moderate
262.4Moderate
272.5Moderate
282.5Moderate
292.5Moderate
302.6Moderate
312.6Moderate
Planning a trip in January

Is January a good time to visit Arvayheer?

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

0.0
Sightseeing
8th-best month of the year
0.0
Beach & pool
8th-best month of the year

January is a weaker month for outdoor sightseeing in Arvayheer.

What to pack for Arvayheer in January

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

In January, Arvayheer sees daytime highs around -10°C and nights near -22°C. Pack a warm layer and a heavy coat.

a warm layera heavy coat

UV index in Arvayheer in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 1. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Arvayheer peaks around July 19 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 10 at about 1 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 7 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highModerateLowJul 19UV 9Jan 10UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar3Moderate
Apr7High
May7Very high
Jun8Very high
Jul9Very high
Aug8Very high
Sep6High
Oct3Moderate
Nov1Low
Dec1Low

Air quality in Arvayheer 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 Arvayheer is worst in June — around 16 µg/m³ PM2.5 (moderate), about 6.2× the cleanest month (December, 3 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJun 2116 µg/m³Dec 173 µg/m³
PM2.5 (µg/m³)Level
Jan6Good
Feb7Good
Mar11Good
Apr11Good
May13Moderate
Jun16Moderate
Jul16Moderate
Aug16Moderate
Sep9Good
Oct7Good
Nov6Good
Dec3Good
Location & terrain

Where is Arvayheer?

Arvayheer sits at 46.3°N, 102.8°E, 1,838 m above sea level, in Mongolia. The nearest listed city is Bayanhongor, 158 km away.

BayanhongorTsetserlegHovdBogdBulganErdenetDalandzadgadDzuunmod

Topography around Arvayheer

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

Within 3 km, the terrain around Arvayheer has only modest variations in elevation — a maximum elevation change of 231 m around an average of 1,849 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 748 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,823 m.

The land around Arvayheer is covered by grassland (77%) within 3 km, grassland (98%) within 16 km, and grassland (89%) within 80 km.

3 km
231 m
16 km
748 m
80 km
1,823 m
treesgrasslandartificial surfacesbare terrainmoss and lichen
January weather nearby: Bayanhongor 158 km · Tsetserleg 168 km · Hovd 180 km · Bogd 183 km · Bulgan 289 km · Erdenet 323 km · Dalandzadgad 326 km · Dzuunmod 355 km

Mongolia travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type C / E / F
220 V · 50 Hz
Prices
≈ 34% of US
price level, 2025
GDP per capita
$7,108
2025
Happiness
5.9 / 10
World Happiness, 2025
Safe drinking water
43%
of population, 2024
Homicide rate
5.9
per 100k, 2023
Road deaths
21
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Very low
EF EPI 447
Religion
Buddhist 52%no religion 41%Muslim 3%Shaman 3%

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 Arvayheer (46.2639°, 102.775°, elevation 1,838 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).