Khon Kaen weather in May

In May, Khon Kaen sees average daytime highs of 35°C and overnight lows near 26°C, with 152 mm of rain across 20.1 wet days and about 12.8 hours of daylight. It is the 3rd-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 35°C through the month. The sky is clear or mostly clear about 12% of the time in May, and the air most often feels oppressive.

Daylight stretches from about 12 h 36 min at the start of May to 12 h 54 min by month's end. Set against the rest of the year, May is Khon Kaen's 8th-clearest and 9th-windiest month. For the whole year in context, see Khon Kaen's year-round climate.

Daytime high
35°
3rd warmest
Overnight low
26°
11th coldest
Rainfall
152 mm
20.1 wet days
Daylight
12 h 48 min
5:42 AM – 6:28 PM
Cloud cover
77%
8th clearest
Wind
8 km/h
9th windiest
Solar energy
5.61 kWh/m²
Travel score
2.0
out of 10

Khon Kaen is city in Khon Kaen province, Thailand.

Air quality
High
PM2.5 34 µg/m³ · 2019
Density
2,488/km²
people per km²
Founded
1935

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

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 35°C through the month.

A typical May day in Khon Kaen reaches about 35°C in the afternoon and slips back to 26°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 31°C and 38°C. Set against its neighbours, May runs about 1°C cooler than April and on par with June.

20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13626
23626
33526
43526
53526
63526
73526
83526
93526
103526
113526
123526
133526
143526
153526
163526
173526
183426
193426
203426
213426
223426
233426
243426
253426
263426
273426
283426
293426
303426
313426

How May really feels in Khon Kaen

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
31 feel dangerously hot (≥ 39°C)
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.

Khon Kaen weather by month

How May compares with the rest of the year at a glance. May is the 3rd-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 18°71.611.16.0
Feb33° / 20°112.411.44.5
Mar35° / 24°345.911.92.8
Apr36° / 26°6510.712.42.0
May35° / 26°15220.112.82.0
Jun34° / 26°13419.2132.2
Jul33° / 26°16420.312.92.4
Aug32° / 26°21423.312.62.5
Sep32° / 25°23723.312.12.7
Oct31° / 24°10412.811.64.1
Nov31° / 21°243.511.25.4
Dec30° / 19°51116.5

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 12% 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 76%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14654
24654
34456
44258
54159
63961
73763
83565
93466
103268
112971
122773
132674
142476
152278
162179
171981
181882
191783
201684
211585
221486
231486
241288
251288
261288
271288
281288
291288
301288
311189

Chance of precipitation in May

Any precipitation

Khon Kaen gets around 152 mm of rain over 20.1 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 64% and peaks near 69% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
152
253
354
455
556
657
758
860
961
1062
1163
1264
1364
1465
1566
1666
1767
1867
1967
2067
2168
2268
2368
2468
2568
2668
2768
2869
2969
3069
3169

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 53% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
187022
276924
376726
466628
556530
656332
746234
846036
935938
1035740
1135641
1225642
1325444
1425345
1525246
1615247
1715247
1815148
1915049
2014950
2114851
2214752
2314653
2404555
2504456
2604357
2704159
2804060
2903961
3003862
3103763

Wind in May

Winds average 8 km/h in May.

Across May, daily wind ranges from about 7 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 12 h 36 min at the start of May to 12 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 18 minutes over May. Sunrise moves from 5:48 AM to 5:39 AM, and sunset from 6:23 PM to 6:33 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.65:486:23
212.65:486:24
312.65:476:24
412.65:476:24
512.65:466:24
612.65:466:25
712.75:456:25
812.75:456:25
912.75:456:26
1012.75:446:26
1112.75:446:26
1212.75:436:27
1312.75:436:27
1412.75:436:27
1512.85:426:28
1612.85:426:28
1712.85:426:28
1812.85:416:29
1912.85:416:29
2012.85:416:29
2112.85:416:30
2212.85:406:30
2312.85:406:30
2412.85:406:31
2512.95:406:31
2612.95:406:31
2712.95:396:32
2812.95:396:32
2912.95:396:32
3012.95:396:33
3112.95:396:33

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.61 kWh/m².

For context, solar energy here swings from a low near 4.52 kWh/m² to a high of 6.1 kWh/m² in April across the year — May's 5.61 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
85.8Bright
95.7Bright
105.7Bright
115.7Bright
125.7Bright
135.6Bright
145.6Bright
155.6Bright
165.6Bright
175.5Bright
185.5Bright
195.5Bright
205.5Bright
215.5Bright
225.5Bright
235.5Bright
245.5Bright
255.5Bright
265.5Bright
275.5Bright
285.4Bright
295.4Bright
305.4Bright
315.4Bright
Planning a trip in May

Hazard calendar for Khon Kaen

In seasonPeak

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

Khon Kaen'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 Khon Kaen?

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

2.0
Sightseeing
11th-best month of the year
4.2
Beach & pool
11th-best month of the year

May is a weaker month for outdoor sightseeing in Khon Kaen.

What to pack for Khon Kaen in May

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

In May, Khon Kaen sees daytime highs around 35°C and nights near 26°C. Pack light clothes and rain gear. Worth having: sun protection. About 20 days see rain.

light clothesrain gearsun protection

UV index in Khon Kaen in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Khon Kaen peaks around August 12 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 14 at about 8 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highAug 12UV 13Dec 14UV 8
UV index (midday)Level
Jan9Very high
Feb10Extreme
Mar12Extreme
Apr10Very high
May12Extreme
Jun12Extreme
Jul13Extreme
Aug13Extreme
Sep11Extreme
Oct10Extreme
Nov8Very high
Dec8Very high

Air quality in Khon Kaen 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 Khon Kaen is worst in March — around 56 µg/m³ PM2.5 (unhealthy), about 2.5× the cleanest month (June, 22 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Khon Kaen's WHO annual average of 34 µg/m³.

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorPoorModerateMar 1555 µg/m³Jun 2222 µg/m³
PM2.5 (µg/m³)Level
Jan37Poor
Feb48Poor
Mar56Unhealthy
Apr43Poor
May31Moderate
Jun22Moderate
Jul23Moderate
Aug24Moderate
Sep29Moderate
Oct33Moderate
Nov31Moderate
Dec29Moderate
Location & terrain

Where is Khon Kaen?

Khon Kaen sits at 16.4°N, 102.8°E, 167 m above sea level, in Thailand. The nearest listed city is Ban Phai, 44 km away.

Topography around Khon Kaen

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

Within 3 km, the terrain around Khon Kaen has only modest variations in elevation — a maximum elevation change of 64 m around an average of 165 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 80 m; within 80 km, large variations in elevation — a maximum elevation change of 683 m.

The land around Khon Kaen is covered by artificial surfaces (51%) and trees (35%) within 3 km, cropland (54%) and trees (26%) within 16 km, and cropland (75%) within 80 km.

3 km
64 m
16 km
80 m
80 km
683 m
treesgrasslandcroplandartificial surfaceswater
May weather nearby: Ban Phai 44 km · Nong Kung Si 55 km · Maha Sarakham 58 km · Kalasin 72 km · Kaeng Khro 72 km · Phu Khiao 76 km · Ban Phan Don 79 km · Chum Phae 79 km

Thailand travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type A / B / C
230 V · 50 Hz
Prices
≈ 31% of US
price level, 2025
GDP per capita
$8,057
2025
Happiness
6.3 / 10
World Happiness, 2025
Homicide rate
4.8
per 100k, 2011
Road deaths
32.2
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Very low
EF EPI 402
Religion
Buddhist 93%Muslim 5%Christian 1%other 1%

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 Khon Kaen (16.4467°, 102.833°, elevation 167 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).