Ban Khoan weather in May

In May, Ban Khoan sees average daytime highs of 33°C and overnight lows near 24°C, with 232 mm of rain across 20.3 wet days and about 13 hours of daylight. It is the 3rd-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 33°C through the month. The sky is clear or mostly clear about 24% of the time in May, and the air most often feels oppressive.

Daylight stretches from about 12 h 42 min at the start of May to 13 h 06 min by month's end. Set against the rest of the year, May is Ban Khoan's 8th-clearest and 3rd-windiest month. For the whole year in context, see Ban Khoan's year-round climate.

Daytime high
33°
3rd warmest
Overnight low
24°
9th coldest
Rainfall
232 mm
20.3 wet days
Daylight
13 hours
5:47 AM – 6:45 PM
Cloud cover
67%
8th clearest
Wind
5 km/h
3rd windiest
Solar energy
5.44 kWh/m²
Travel score
2.6
out of 10

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 33°C through the month.

A typical May day in Ban Khoan reaches about 33°C in the afternoon and slips back to 24°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 37°C. Set against its neighbours, May runs about 2°C cooler than April and about 1°C warmer than June.

20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13423
23423
33423
43423
53423
63424
73424
83324
93324
103324
113324
123324
133324
143324
153324
163324
173324
183324
193324
203324
213324
223324
233324
243324
253324
263324
273324
283324
293324
303324
313225

How May really feels in Ban Khoan

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.

Ban Khoan weather by month

How May compares with the rest of the year at a glance. May is the 3rd-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 14°212.510.97.6
Feb31° / 15°111.811.35.7
Mar34° / 18°344.311.93.8
Apr35° / 22°979.912.52.9
May33° / 24°23220.3132.6
Jun32° / 25°27225.313.22.3
Jul31° / 25°3902813.12.4
Aug31° / 24°39028.512.72.4
Sep31° / 24°29024.112.12.8
Oct31° / 22°12615.911.54.2
Nov29° / 19°405.3116.3
Dec27° / 16°242.910.88.0

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 24% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 17% of May, with mostly cloudy or overcast conditions the remaining 59%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16733
26634
36535
46436
56238
66139
75941
85743
95446
105347
115149
124852
134654
144456
154258
164060
173763
183664
193565
203268
213070
222872
232773
242575
252377
262377
272179
282080
291981
301684
311585

Chance of precipitation in May

Any precipitation

Ban Khoan gets around 232 mm of rain over 20.3 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 65% and peaks near 81% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
150
251
352
453
554
655
756
857
959
1060
1161
1262
1363
1464
1565
1666
1767
1868
1968
2069
2170
2271
2372
2473
2574
2675
2776
2877
2978
3080
3181

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the oppressive band about 71% of days. Sticky, muggy-or-worse air turns up on roughly 99% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1122743
2121753
3119764
4118774
5116785
6215776
7213787
8212788
9211789
102107810
11297910
12297811
13287713
14277714
15177715
16177616
17167518
18167419
19157321
20157222
21157024
22156826
23146728
24146431
25046333
26036235
27035938
28035740
29025543
30025246
31025048

Wind in May

Winds average 5 km/h in May.

Across May, daily wind ranges from about 4 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
15calm
24calm
34calm
44calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm
315calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 12 h 42 min at the start of May to 13 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 24 minutes over May. Sunrise moves from 5:55 AM to 5:43 AM, and sunset from 6:39 PM to 6:51 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.75:556:39
212.85:546:39
312.85:546:40
412.85:536:40
512.85:526:40
612.85:526:41
712.85:516:41
812.85:516:42
912.95:506:42
1012.95:506:42
1112.95:496:43
1212.95:496:43
1312.95:486:44
1412.95:486:44
1512.95:476:44
1613.05:476:45
1713.05:476:45
1813.05:466:46
1913.05:466:46
2013.05:466:46
2113.05:456:47
2213.05:456:47
2313.15:456:48
2413.15:446:48
2513.15:446:49
2613.15:446:49
2713.15:446:49
2813.15:446:50
2913.15:436:50
3013.15:436:51
3113.15:436:51

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.44 kWh/m².

For context, solar energy here swings from a low near 4.04 kWh/m² to a high of 6.27 kWh/m² in April across the year — May's 5.44 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.0Bright
25.9Bright
35.9Bright
45.9Bright
55.8Bright
65.8Bright
75.8Bright
85.7Bright
95.7Bright
105.6Bright
115.6Bright
125.6Bright
135.5Bright
145.5Bright
155.5Bright
165.4Bright
175.4Bright
185.3Bright
195.3Bright
205.3Bright
215.3Bright
225.2Bright
235.2Bright
245.2Bright
255.2Bright
265.1Bright
275.1Bright
285.1Bright
295.0Bright
305.0Bright
315.0Bright
Planning a trip in May

Hazard calendar for Ban Khoan

In seasonPeak

In May, Ban Khoan sits inside its pacific typhoon and monsoon season. The full year is below, with each hazard's peak months called out.

Ban Khoan sits in the Pacific typhoon belt; the season peaks July–October.

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

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

Is May a good time to visit Ban Khoan?

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

2.6
Sightseeing
9th-best month of the year
4.7
Beach & pool
8th-best month of the year

May is a weaker month for outdoor sightseeing in Ban Khoan.

What to pack for Ban Khoan in May

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

In May, Ban Khoan sees daytime highs around 33°C and nights near 24°C. Pack light clothes and rain gear. Worth having: sun protection. About 20 days see rain.

light clothesrain gearsun protection

UV index in Ban Khoan 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 Ban Khoan peaks around July 19 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 7 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highHighJul 19UV 13Dec 20UV 7
UV index (midday)Level
Jan7High
Feb9Very high
Mar9Very high
Apr10Very high
May11Extreme
Jun13Extreme
Jul13Extreme
Aug13Extreme
Sep11Extreme
Oct10Extreme
Nov8Very high
Dec7High

Air quality in Ban Khoan 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 Ban Khoan is worst in April — around 156 µg/m³ PM2.5 (very unhealthy), about 12.0× the cleanest month (July, 13 µg/m³).

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

0306090120150180JanFebMarAprMayJunJulAugSepOctNovDecModerateUnhealthyModerateApr 11150 µg/m³Jul 2313 µg/m³
PM2.5 (µg/m³)Level
Jan23Moderate
Feb40Poor
Mar128Unhealthy
Apr156Very unhealthy
May37Poor
Jun15Moderate
Jul13Moderate
Aug13Moderate
Sep13Moderate
Oct14Moderate
Nov15Moderate
Dec19Moderate
Location & terrain

Where is Ban Khoan?

Ban Khoan sits at 20.4°N, 100.1°E, 373 m above sea level, in Laos. The nearest listed city is Mae Sai, 24 km away.

Chiang RaiMöng YawngPhayaoDok Kham Tai

Topography around Ban Khoan

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

Within 3 km, the terrain around Ban Khoan has only modest variations in elevation — a maximum elevation change of 145 m around an average of 382 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 862 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,714 m.

The land around Ban Khoan is covered by trees (42%) and cropland (25%) within 3 km, trees (46%) and cropland (38%) within 16 km, and trees (81%) within 80 km.

3 km
145 m
16 km
862 m
80 km
1,714 m
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Mae Sai 24 km · Tachilek 24 km · Mae Chan 34 km · Ban Houakhoua 40 km · Chiang Rai 56 km · Möng Yawng 96 km · Phayao 131 km · Dok Kham Tai 132 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 Ban Khoan (20.3501°, 100.0902°, elevation 373 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). 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).