Borikhan weather in May

In May, Borikhan sees average daytime highs of 32°C and overnight lows near 24°C, with 295 mm of rain across 26.2 wet days and about 12.9 hours of daylight. It is the 2nd-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 33°C in the first days to 31°C by the end. The sky is clear or mostly clear about 9% of the time in May, and the air most often feels miserable.

Daylight stretches from about 12 h 42 min at the start of May to 13 hours by month's end. Set against the rest of the year, May is Borikhan's 9th-clearest and 11th-windiest month. For the whole year in context, see Borikhan's year-round climate.

Daytime high
32°
2nd warmest
Overnight low
24°
9th coldest
Rainfall
295 mm
26.2 wet days
Daylight
12 h 54 min
5:35 AM – 6:27 PM
Cloud cover
79%
9th clearest
Wind
4 km/h
11th windiest
Solar energy
4.73 kWh/m²
Travel score
2.5
out of 10

Borikhan is town in Bolikhamsai Province, Laos.

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 33°C in the first days to 31°C by the end.

A typical May day in Borikhan reaches about 32°C in the afternoon and slips back to 24°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 35°C. Set against its neighbours, May runs about 1°C cooler than April and about 1°C warmer than June.

20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13324
23324
33324
43324
53324
63224
73224
83224
93224
103224
113224
123224
133224
143224
153224
163224
173224
183124
193124
203124
213124
223124
233124
243124
253124
263124
273124
283124
293124
303124
313124

How May really feels in Borikhan

Once humidity and wind are folded in, May averages 31 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
31
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in May is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Borikhan weather by month

How May compares with the rest of the year at a glance. May is the 2nd-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 15°101.6118.1
Feb29° / 17°19311.46.5
Mar32° / 20°427.211.94.8
Apr33° / 23°8414.512.43.3
May32° / 24°29526.212.92.5
Jun31° / 24°43328.913.12.4
Jul30° / 24°56030.3132.6
Aug30° / 24°53330.412.62.6
Sep31° / 24°32824.312.13.0
Oct31° / 22°8510.611.64.4
Nov30° / 19°172.611.16.1
Dec28° / 16°7110.97.9

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 9% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 12% of May, with mostly cloudy or overcast conditions the remaining 79%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14159
24060
33961
43862
53664
63565
73268
83070
93070
102971
112773
122674
132476
142377
152179
162080
171783
181783
191585
201387
211387
221189
231189
241090
25991
26991
27991
28991
29991
30892
31793

Chance of precipitation in May

Any precipitation

Borikhan gets around 295 mm of rain over 26.2 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 84% and peaks near 94% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%100%151015202531
Rain chance (%)
168
269
370
471
573
674
775
877
978
1079
1181
1282
1383
1484
1586
1687
1788
1888
1989
2090
2190
2291
2391
2492
2592
2693
2793
2893
2994
3094
3194

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the miserable band about 63% of days. Sticky, muggy-or-worse air turns up on roughly 99% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1185932
2185635
3175537
4175240
5165043
6164845
7164548
8164350
9154054
10153856
11153658
12153559
13143362
14143263
15143164
16142966
17132868
18132769
19132670
20022672
21022573
22022474
23022375
24022276
25012178
26011980
27011881
28011782
29011683
30011584
31011485

Wind in May

Winds average 4 km/h in May.

Across May, daily wind ranges from about 4 km/h on the calmest days to 4 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
14calm
24calm
34calm
44calm
54calm
64calm
74calm
84calm
94calm
104calm
114calm
124calm
134calm
144calm
154calm
164calm
174calm
184calm
194calm
204calm
214calm
224calm
234calm
244calm
254calm
264calm
274calm
284calm
294calm
304calm
314calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 12 h 42 min at the start of May to 13 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 18 minutes over May. Sunrise moves from 5:42 AM to 5:32 AM, and sunset from 6:22 PM to 6:33 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.75:426:22
212.75:426:23
312.75:416:23
412.75:416:23
512.75:406:24
612.75:406:24
712.85:396:24
812.85:396:25
912.85:386:25
1012.85:386:25
1112.85:376:26
1212.85:376:26
1312.85:366:26
1412.85:366:27
1512.95:366:27
1612.95:356:27
1712.95:356:28
1812.95:356:28
1912.95:346:29
2012.95:346:29
2112.95:346:29
2212.95:336:30
2313.05:336:30
2413.05:336:31
2513.05:336:31
2613.05:326:31
2713.05:326:32
2813.05:326:32
2913.05:326:32
3013.05:326:33
3113.05:326:33

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 4.73 kWh/m².

For context, solar energy here swings from a low near 3.7 kWh/m² to a high of 5.8 kWh/m² in April across the year — May's 4.73 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.5Bright
25.4Bright
35.4Bright
45.3Bright
55.3Bright
65.3Bright
75.2Bright
85.2Bright
95.1Bright
105.0Bright
115.0Bright
124.9Bright
134.9Bright
144.8Bright
154.8Bright
164.7Bright
174.7Bright
184.6Bright
194.6Bright
204.5Bright
214.5Bright
224.4Bright
234.4Bright
244.4Bright
254.3Bright
264.3Bright
274.3Bright
284.3Bright
294.3Bright
304.2Bright
314.2Bright
Planning a trip in May

Hazard calendar for Borikhan

In seasonPeak

In May, Borikhan sits inside its monsoon season. The full year is below, with each hazard's peak months called out.

Borikhan's monsoon runs May–September, when most of the year's rain falls.

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

Is May a good time to visit Borikhan?

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

2.5
Sightseeing
11th-best month of the year
4.0
Beach & pool
9th-best month of the year

May is a weaker month for outdoor sightseeing in Borikhan.

What to pack for Borikhan in May

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

In May, Borikhan sees daytime highs around 32°C and nights near 24°C. Pack light clothes and rain gear. Worth having: sun protection. About 26 days see rain.

light clothesrain gearsun protection

UV index in Borikhan in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Borikhan peaks around August 10 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 7 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highAug 10UV 13Dec 15UV 7
UV index (midday)Level
Jan8Very high
Feb9Very high
Mar11Extreme
Apr10Very high
May11Extreme
Jun13Extreme
Jul13Extreme
Aug13Extreme
Sep12Extreme
Oct10Extreme
Nov8Very high
Dec7Very high

Air quality in Borikhan 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 Borikhan is worst in April — around 200 µg/m³ PM2.5 (very unhealthy), about 20.2× the cleanest month (November, 10 µg/m³).

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

0306090120150180210JanFebMarAprMayJunJulAugSepOctNovDecModerateUnhealthyVery unhealthyModerateGoodModerateApr 11192 µg/m³Nov 1210 µg/m³
PM2.5 (µg/m³)Level
Jan19Moderate
Feb42Poor
Mar158Very unhealthy
Apr200Very unhealthy
May29Moderate
Jun12Good
Jul12Good
Aug11Good
Sep10Good
Oct11Good
Nov10Good
Dec13Moderate
Location & terrain

Where is Borikhan?

Borikhan sits at 18.6°N, 103.7°E, 165 m above sea level, in Laos. The nearest listed city is Pakxan, 20 km away.

SekaPhon CharoenBan DungMuang PhônsavanSawang Daen DinNong KhaiVientiane

Topography around Borikhan

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

Within 3 km, the terrain around Borikhan has only modest variations in elevation — a maximum elevation change of 220 m around an average of 183 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 599 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,671 m.

The land around Borikhan is covered by trees (63%) and cropland (20%) within 3 km, trees (79%) within 16 km, and trees (84%) within 80 km.

3 km
220 m
16 km
599 m
80 km
2,671 m
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Pakxan 20 km · Seka 75 km · Phon Charoen 83 km · Ban Dung 108 km · Muang Phônsavan 113 km · Sawang Daen Din 124 km · Nong Khai 129 km · Vientiane 136 km

Laos travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type A / B / C / E / F
230 V · 50 Hz
Prices
≈ 23% of US
price level, 2025
GDP per capita
$2,325
2025
Happiness
5.5 / 10
World Happiness, 2025
Safe drinking water
35%
of population, 2024
Road deaths
17.9
per 100k/yr, 2019
Income group
Lower middle
World Bank
English
Low
EF EPI 461
Religion
Buddhist 65%none 31%other/not stated 2%Christian 2%

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 Borikhan (18.5629°, 103.7267°, elevation 165 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).