Arvayheer weather in May

In May, Arvayheer sees average daytime highs of 16°C and overnight lows near 2°C, with 27 mm of precipitation across 5.9 wet days and about 14.7 hours of daylight. It is the 5th-warmest and 4th-wettest month of the year here.

Highs climb over the month, from about 13°C in the first days to 18°C by the end. The sky is clear or mostly clear about 30% of the time in May, and the air most often feels dry.

Daylight stretches from about 14 h 06 min at the start of May to 15 h 18 min by month's end. Set against the rest of the year, May is Arvayheer's 10th-clearest and 1st-windiest month. For the whole year in context, see Arvayheer's year-round climate.

Daytime high: 16°; 5th warmest
Overnight low: 2°; 8th coldest
Precipitation: 27 mm; 5.9 wet days
Daylight: 14 h 48 min; 5:42 AM – 8:28 PM
Cloud cover: 57%; 10th clearest
Wind: 14 km/h; 1st windiest
Solar energy: 6.63 kWh/m²
Travel score: 5.3; 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.

← April Arvayheer year-round climate June →Best places to visit in May

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

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 13°C in the first days to 18°C by the end.

A typical May day in Arvayheer reaches about 16°C in the afternoon and slips back to 2°C overnight — a 14°C spread between the day's warmth and the night's chill. On most days the high lands between 8°C and 23°C. Set against its neighbours, May runs about 6°C warmer than April and about 5°C cooler than June.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Avg high (°C)	13	13	13	13	13	13	14	14	14	14	14	15	15	15	15	16	16	16	16	17	17	17	17	17	18	18	18	18	18	19	19
Avg low (°C)	-1	0	0	0	0	0	0	1	1	1	1	1	1	2	2	2	2	2	3	3	3	3	4	4	4	4	4	5	5	5	5

	Avg high (°C)	Avg low (°C)
1	13	-1
2	13	0
3	13	0
4	13	0
5	13	0
6	13	0
7	14	0
8	14	1
9	14	1
10	14	1
11	14	1
12	15	1
13	15	1
14	15	2
15	15	2
16	16	2
17	16	2
18	16	2
19	16	3
20	17	3
21	17	3
22	17	3
23	17	4
24	17	4
25	18	4
26	18	4
27	18	4
28	18	5
29	18	5
30	19	5
31	19	5

How May really feels in Arvayheer

Once humidity and wind are folded in, May averages 0 days that feel above 32°C and 22 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

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

Arvayheer weather by month

How May compares with the rest of the year at a glance. May is the 5th-warmest and 4th-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	-10° / -22°	1	0.3	0.8	8.8	0.0
Feb	-6° / -19°	3	0.9	1.2	10	0.0
Mar	1° / -12°	7	2.2	2.9	11.6	0.0
Apr	9° / -4°	13	4	3.1	13.3	2.2
May	16° / 2°	27	5.9	2.1	14.7	5.3
Jun	21° / 9°	43	8.4	0.2	15.5	6.6
Jul	23° / 12°	62	11	0	15.2	6.6
Aug	21° / 10°	50	9	0.1	14	6.7
Sep	16° / 3°	23	5.2	1.1	12.3	5.6
Oct	8° / -5°	10	2.7	2.5	10.7	1.7
Nov	-2° / -13°	4	1.2	1.7	9.2	0.0
Dec	-8° / -19°	2	0.4	0.9	8.5	0.0

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 30% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 19% of May, with mostly cloudy or overcast conditions the remaining 51%.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Clearer (%)	47	46	46	47	46	45	46	46	46	46	47	47	48	48	48	50	50	50	50	51	51	51	51	51	51	51	51	51	52	52	52
Cloudier (%)	53	54	54	53	54	55	54	54	54	54	53	53	52	52	52	50	50	50	50	49	49	49	49	49	49	49	49	49	48	48	48

	Clearer (%)	Cloudier (%)
1	47	53
2	46	54
3	46	54
4	47	53
5	46	54
6	45	55
7	46	54
8	46	54
9	46	54
10	46	54
11	47	53
12	47	53
13	48	52
14	48	52
15	48	52
16	50	50
17	50	50
18	50	50
19	50	50
20	51	49
21	51	49
22	51	49
23	51	49
24	51	49
25	51	49
26	51	49
27	51	49
28	51	49
29	52	48
30	52	48
31	52	48

Chance of precipitation in May

Any precipitationSnow

Arvayheer gets around 27 mm of rain and snow over 5.9 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 19% and peaks near 21% on the wettest days, and about 2 days bring snow.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Rain chance (%)	17	18	18	19	20	20	20	21	21	21	21	21	21	21	21	20	20	20	19	19	19	18	18	18	18	18	18	18	18	18	18
Snow chance (%)	9	9	9	9	9	9	9	9	10	10	10	9	9	9	8	8	7	7	6	6	5	5	4	4	4	3	3	2	2	2	2

	Rain chance (%)	Snow chance (%)
1	17	9
2	18	9
3	18	9
4	19	9
5	20	9
6	20	9
7	20	9
8	21	9
9	21	10
10	21	10
11	21	10
12	21	9
13	21	9
14	21	9
15	21	8
16	20	8
17	20	7
18	20	7
19	19	6
20	19	6
21	19	5
22	18	5
23	18	4
24	18	4
25	18	4
26	18	3
27	18	3
28	18	2
29	18	2
30	18	2
31	18	2

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

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Dry (%)	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

Wind in May

Winds average 14 km/h in May, the windiest month of the year.

Across May, daily wind ranges from about 13 km/h on the calmest days to 15 km/h at its breeziest. It stays fairly steady from day to day.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Wind speed (km/h)	15	15	15	15	15	15	15	15	15	15	15	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	14	13	13	13
Feels	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze

	Wind speed (km/h)	Feels
1	15	light breeze
2	15	light breeze
3	15	light breeze
4	15	light breeze
5	15	light breeze
6	15	light breeze
7	15	light breeze
8	15	light breeze
9	15	light breeze
10	15	light breeze
11	15	light breeze
12	14	light breeze
13	14	light breeze
14	14	light breeze
15	14	light breeze
16	14	light breeze
17	14	light breeze
18	14	light breeze
19	14	light breeze
20	14	light breeze
21	14	light breeze
22	14	light breeze
23	14	light breeze
24	14	light breeze
25	14	light breeze
26	14	light breeze
27	14	light breeze
28	14	light breeze
29	13	light breeze
30	13	light breeze
31	13	light breeze

Sunrise & sunset in May

DaylightNight

Daylight runs from about 14 h 06 min at the start of May to 15 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 72 minutes over May. Sunrise moves from 6:03 AM to 5:28 AM, and sunset from 8:09 PM to 8:45 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Daylight (h)	14.1	14.1	14.2	14.2	14.3	14.3	14.4	14.4	14.5	14.5	14.6	14.6	14.6	14.7	14.7	14.8	14.8	14.8	14.9	14.9	15.0	15.0	15.0	15.1	15.1	15.1	15.2	15.2	15.2	15.2	15.3
Sunrise (AM)	6:03	6:02	6:00	5:59	5:57	5:56	5:54	5:53	5:51	5:50	5:49	5:47	5:46	5:45	5:43	5:42	5:41	5:40	5:39	5:38	5:37	5:36	5:35	5:34	5:33	5:32	5:31	5:30	5:29	5:29	5:28
Sunset (PM)	8:09	8:10	8:11	8:13	8:14	8:15	8:17	8:18	8:19	8:21	8:22	8:23	8:24	8:26	8:27	8:28	8:29	8:31	8:32	8:33	8:34	8:35	8:36	8:37	8:39	8:40	8:41	8:42	8:43	8:44	8:45

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	14.1	6:03	8:09
2	14.1	6:02	8:10
3	14.2	6:00	8:11
4	14.2	5:59	8:13
5	14.3	5:57	8:14
6	14.3	5:56	8:15
7	14.4	5:54	8:17
8	14.4	5:53	8:18
9	14.5	5:51	8:19
10	14.5	5:50	8:21
11	14.6	5:49	8:22
12	14.6	5:47	8:23
13	14.6	5:46	8:24
14	14.7	5:45	8:26
15	14.7	5:43	8:27
16	14.8	5:42	8:28
17	14.8	5:41	8:29
18	14.8	5:40	8:31
19	14.9	5:39	8:32
20	14.9	5:38	8:33
21	15.0	5:37	8:34
22	15.0	5:36	8:35
23	15.0	5:35	8:36
24	15.1	5:34	8:37
25	15.1	5:33	8:39
26	15.1	5:32	8:40
27	15.2	5:31	8:41
28	15.2	5:30	8:42
29	15.2	5:29	8:43
30	15.2	5:29	8:44
31	15.3	5:28	8:45

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 6.63 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 — May's 6.63 kWh/m² sits near the top of that range.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Solar energy (kWh/m²)	6.2	6.3	6.3	6.3	6.3	6.3	6.4	6.4	6.4	6.5	6.5	6.5	6.5	6.6	6.6	6.6	6.7	6.7	6.7	6.7	6.8	6.8	6.8	6.8	6.8	6.8	6.8	6.8	6.8	6.8	6.8
Level	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense	Intense

	Solar energy (kWh/m²)	Level
1	6.2	Intense
2	6.3	Intense
3	6.3	Intense
4	6.3	Intense
5	6.3	Intense
6	6.3	Intense
7	6.4	Intense
8	6.4	Intense
9	6.4	Intense
10	6.5	Intense
11	6.5	Intense
12	6.5	Intense
13	6.5	Intense
14	6.6	Intense
15	6.6	Intense
16	6.6	Intense
17	6.7	Intense
18	6.7	Intense
19	6.7	Intense
20	6.7	Intense
21	6.8	Intense
22	6.8	Intense
23	6.8	Intense
24	6.8	Intense
25	6.8	Intense
26	6.8	Intense
27	6.8	Intense
28	6.8	Intense
29	6.8	Intense
30	6.8	Intense
31	6.8	Intense

Planning a trip in May

Is May a good time to visit Arvayheer?

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

5.3

Sightseeing

5th-best month of the year

0.9

Beach & pool

5th-best month of the year

May is a reasonable time to visit Arvayheer for sightseeing.

What to pack for Arvayheer in May

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

In May, Arvayheer sees daytime highs around 16°C and nights near 2°C. Pack sun protection. Worth having: a warm layer. About 6 days see rain.

sun protectiona warm layer

UV index in Arvayheer in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 7 — enough to warrant sun protection. 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.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	1	2	3	7	7	8	9	8	6	3	1	1
Level	Low	Moderate	Moderate	High	Very high	Very high	Very high	Very high	High	Moderate	Low	Low

	UV index (midday)	Level
Jan	1	Low
Feb	2	Moderate
Mar	3	Moderate
Apr	7	High
May	7	Very high
Jun	8	Very high
Jul	9	Very high
Aug	8	Very high
Sep	6	High
Oct	3	Moderate
Nov	1	Low
Dec	1	Low

Air quality in Arvayheer 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 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).

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	6	7	11	11	13	16	16	16	9	7	6	3
Level	Good	Good	Good	Good	Moderate	Moderate	Moderate	Moderate	Good	Good	Good	Good

	PM2.5 (µg/m³)	Level
Jan	6	Good
Feb	7	Good
Mar	11	Good
Apr	11	Good
May	13	Moderate
Jun	16	Moderate
Jul	16	Moderate
Aug	16	Moderate
Sep	9	Good
Oct	7	Good
Nov	6	Good
Dec	3	Good

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.

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

grassland 77%

16 km

748 m

grassland 98%

80 km

1,823 m

grassland 89%

treesgrasslandartificial surfacesbare terrainmoss and lichen

← April Arvayheer year-round climate June →Best places to visit in May

May 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

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).

	Avg high (°C)	Avg low (°C)
1	13	-1
2	13	0
3	13	0
4	13	0
5	13	0
6	13	0
7	14	0
8	14	1
9	14	1
10	14	1
11	14	1
12	15	1
13	15	1
14	15	2
15	15	2
16	16	2
17	16	2
18	16	2
19	16	3
20	17	3
21	17	3
22	17	3
23	17	4
24	17	4
25	18	4
26	18	4
27	18	4
28	18	5
29	18	5
30	19	5
31	19	5

	Clearer (%)	Cloudier (%)
1	47	53
2	46	54
3	46	54
4	47	53
5	46	54
6	45	55
7	46	54
8	46	54
9	46	54
10	46	54
11	47	53
12	47	53
13	48	52
14	48	52
15	48	52
16	50	50
17	50	50
18	50	50
19	50	50
20	51	49
21	51	49
22	51	49
23	51	49
24	51	49
25	51	49
26	51	49
27	51	49
28	51	49
29	52	48
30	52	48
31	52	48

	Rain chance (%)	Snow chance (%)
1	17	9
2	18	9
3	18	9
4	19	9
5	20	9
6	20	9
7	20	9
8	21	9
9	21	10
10	21	10
11	21	10
12	21	9
13	21	9
14	21	9
15	21	8
16	20	8
17	20	7
18	20	7
19	19	6
20	19	6
21	19	5
22	18	5
23	18	4
24	18	4
25	18	4
26	18	3
27	18	3
28	18	2
29	18	2
30	18	2
31	18	2

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

	Avg high (°C)	Avg low (°C)
1	13	-1
2	13	0
3	13	0
4	13	0
5	13	0
6	13	0
7	14	0
8	14	1
9	14	1
10	14	1
11	14	1
12	15	1
13	15	1
14	15	2
15	15	2
16	16	2
17	16	2
18	16	2
19	16	3
20	17	3
21	17	3
22	17	3
23	17	4
24	17	4
25	18	4
26	18	4
27	18	4
28	18	5
29	18	5
30	19	5
31	19	5

	Clearer (%)	Cloudier (%)
1	47	53
2	46	54
3	46	54
4	47	53
5	46	54
6	45	55
7	46	54
8	46	54
9	46	54
10	46	54
11	47	53
12	47	53
13	48	52
14	48	52
15	48	52
16	50	50
17	50	50
18	50	50
19	50	50
20	51	49
21	51	49
22	51	49
23	51	49
24	51	49
25	51	49
26	51	49
27	51	49
28	51	49
29	52	48
30	52	48
31	52	48

	Rain chance (%)	Snow chance (%)
1	17	9
2	18	9
3	18	9
4	19	9
5	20	9
6	20	9
7	20	9
8	21	9
9	21	10
10	21	10
11	21	10
12	21	9
13	21	9
14	21	9
15	21	8
16	20	8
17	20	7
18	20	7
19	19	6
20	19	6
21	19	5
22	18	5
23	18	4
24	18	4
25	18	4
26	18	3
27	18	3
28	18	2
29	18	2
30	18	2
31	18	2

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

	Avg high (°C)	Avg low (°C)
1	13	-1
2	13	0
3	13	0
4	13	0
5	13	0
6	13	0
7	14	0
8	14	1
9	14	1
10	14	1
11	14	1
12	15	1
13	15	1
14	15	2
15	15	2
16	16	2
17	16	2
18	16	2
19	16	3
20	17	3
21	17	3
22	17	3
23	17	4
24	17	4
25	18	4
26	18	4
27	18	4
28	18	5
29	18	5
30	19	5
31	19	5

	Clearer (%)	Cloudier (%)
1	47	53
2	46	54
3	46	54
4	47	53
5	46	54
6	45	55
7	46	54
8	46	54
9	46	54
10	46	54
11	47	53
12	47	53
13	48	52
14	48	52
15	48	52
16	50	50
17	50	50
18	50	50
19	50	50
20	51	49
21	51	49
22	51	49
23	51	49
24	51	49
25	51	49
26	51	49
27	51	49
28	51	49
29	52	48
30	52	48
31	52	48

	Rain chance (%)	Snow chance (%)
1	17	9
2	18	9
3	18	9
4	19	9
5	20	9
6	20	9
7	20	9
8	21	9
9	21	10
10	21	10
11	21	10
12	21	9
13	21	9
14	21	9
15	21	8
16	20	8
17	20	7
18	20	7
19	19	6
20	19	6
21	19	5
22	18	5
23	18	4
24	18	4
25	18	4
26	18	3
27	18	3
28	18	2
29	18	2
30	18	2
31	18	2

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100