Kaset Wisai weather in May

In May, Kaset Wisai sees average daytime highs of 35°C and overnight lows near 26°C, with 177 mm of rain across 20.6 wet days and about 12.7 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 11% of the time in May, and the air most often feels miserable.

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 Kaset Wisai's 8th-clearest and 10th-windiest month. For the whole year in context, see Kaset Wisai's year-round climate.

Daytime high
35°
3rd warmest
Overnight low
26°
12th coldest
Rainfall
177 mm
20.6 wet days
Daylight
12 h 42 min
5:40 AM – 6:24 PM
Cloud cover
78%
8th clearest
Wind
8 km/h
10th windiest
Solar energy
5.68 kWh/m²
Travel score
2.0
out of 10

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 Kaset Wisai reaches about 35°C in the afternoon and slips back to 26°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 32°C and 38°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)
13526
23526
33526
43526
53526
63526
73526
83526
93526
103526
113526
123526
133526
143526
153526
163526
173426
183426
193426
203426
213426
223426
233426
243426
253426
263426
273426
283426
293426
303426
313426

How May really feels in Kaset Wisai

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.

Kaset Wisai 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
Jan31° / 18°61.711.25.8
Feb33° / 20°112.211.54.4
Mar35° / 24°416.411.92.8
Apr36° / 26°6911.512.32.0
May35° / 26°17720.612.72.0
Jun34° / 26°15720.612.92.2
Jul33° / 26°19322.212.82.4
Aug32° / 26°23324.612.52.4
Sep32° / 25°26324.612.12.6
Oct31° / 24°12413.211.64.0
Nov31° / 22°263.611.35.2
Dec30° / 19°61.311.16.2

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 11% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 13% 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 (%)
14852
24654
34456
44258
54060
63763
73664
83466
93169
103070
112872
122674
132476
142179
152179
161981
171783
181684
191585
201486
211486
221486
231486
241387
251387
261387
271288
281288
291288
301288
311288

Chance of precipitation in May

Any precipitation

Kaset Wisai gets around 177 mm of rain over 20.6 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 66% and peaks near 73% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
156
257
358
458
559
660
761
862
963
1064
1164
1265
1365
1466
1567
1667
1768
1868
1968
2069
2169
2269
2370
2470
2570
2671
2771
2872
2972
3073
3173

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 49% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1176824
2176626
3166528
4156331
5056233
6046135
7036037
8035839
9035641
10025642
11025444
12025345
13015247
14015148
15014949
16014851
17014752
18014653
19014455
20014356
21014257
22004159
23004060
24003961
25003862
26003664
27003565
28003466
29003466
30003367
31003268

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 9 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
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
269calm
279calm
289calm
299calm
309calm
319calm

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 5:46 AM to 5:37 AM, and sunset from 6:19 PM to 6:29 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.65:466:19
212.65:466:20
312.65:456:20
412.65:456:20
512.65:446:21
612.65:446:21
712.65:436:21
812.65:436:21
912.75:436:22
1012.75:426:22
1112.75:426:22
1212.75:416:22
1312.75:416:23
1412.75:416:23
1512.75:406:23
1612.75:406:24
1712.75:406:24
1812.75:406:24
1912.85:396:25
2012.85:396:25
2112.85:396:25
2212.85:396:26
2312.85:386:26
2412.85:386:26
2512.85:386:27
2612.85:386:27
2712.85:386:27
2812.85:386:28
2912.85:386:28
3012.85:386:28
3112.95:376:29

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.68 kWh/m².

For context, solar energy here swings from a low near 4.51 kWh/m² to a high of 6.19 kWh/m² in April across the year — May's 5.68 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.0Intense
26.0Intense
36.0Bright
46.0Bright
55.9Bright
65.9Bright
75.9Bright
85.8Bright
95.8Bright
105.8Bright
115.8Bright
125.7Bright
135.7Bright
145.7Bright
155.7Bright
165.6Bright
175.6Bright
185.6Bright
195.6Bright
205.6Bright
215.6Bright
225.6Bright
235.6Bright
245.5Bright
255.5Bright
265.5Bright
275.5Bright
285.5Bright
295.5Bright
305.5Bright
315.5Bright
Planning a trip in May

Hazard calendar for Kaset Wisai

In seasonPeak

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

Kaset Wisai's monsoon runs May–October, 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 Kaset Wisai?

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
10th-best month of the year

May is a weaker month for outdoor sightseeing in Kaset Wisai.

What to pack for Kaset Wisai in May

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

In May, Kaset Wisai sees daytime highs around 35°C and nights near 26°C. Pack light clothes and rain gear. Worth having: sun protection. About 21 days see rain.

light clothesrain gearsun protection

UV index in Kaset Wisai 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 Kaset Wisai peaks around August 13 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 23 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 13UV 13Nov 23UV 8
UV index (midday)Level
Jan9Very high
Feb10Extreme
Mar12Extreme
Apr10Very high
May11Extreme
Jun12Extreme
Jul13Extreme
Aug13Extreme
Sep12Extreme
Oct11Extreme
Nov8Very high
Dec8Very high

Air quality in Kaset Wisai 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 Kaset Wisai is worst in March — around 52 µg/m³ PM2.5 (poor), about 2.6× the cleanest month (December, 20 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateMar 1751 µg/m³Dec 1320 µg/m³
PM2.5 (µg/m³)Level
Jan28Moderate
Feb40Poor
Mar52Poor
Apr41Poor
May30Moderate
Jun22Moderate
Jul24Moderate
Aug25Moderate
Sep28Moderate
Oct28Moderate
Nov23Moderate
Dec20Moderate
Location & terrain

Where is Kaset Wisai?

Kaset Wisai sits at 15.7°N, 103.6°E, 145 m above sea level, in Thailand. The nearest listed city is Roi Et, 45 km away.

Topography around Kaset Wisai

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

Within 3 km, the terrain around Kaset Wisai has only modest variations in elevation — a maximum elevation change of 33 m around an average of 132 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 37 m; within 80 km, only modest variations in elevation — a maximum elevation change of 133 m.

The land around Kaset Wisai is covered by cropland (65%) within 3 km, cropland (81%) within 16 km, and cropland (81%) within 80 km.

3 km
33 m
16 km
37 m
80 km
133 m
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Roi Et 45 km · Ban Selaphum 56 km · Yasothon 62 km · Maha Sarakham 66 km · Kamalasai 76 km · Surin 87 km · Kalasin 87 km · Buri Ram 90 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 Kaset Wisai (15.6556°, 103.5836°, elevation 145 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).