Ban Selaphum weather in May

In May, Ban Selaphum sees average daytime highs of 34°C and overnight lows near 26°C, with 183 mm of rain across 21.7 wet days and about 12.7 hours of daylight. It is the 3rd-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 35°C in the first days to 34°C by the end. The sky is clear or mostly clear about 10% 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 Ban Selaphum's 8th-clearest and 11th-windiest month. For the whole year in context, see Ban Selaphum's year-round climate.

Daytime high
34°
3rd warmest
Overnight low
26°
12th coldest
Rainfall
183 mm
21.7 wet days
Daylight
12 h 42 min
5:38 AM – 6:23 PM
Cloud cover
78%
8th clearest
Wind
8 km/h
11th windiest
Solar energy
5.57 kWh/m²
Travel score
2.0
out of 10

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 35°C in the first days to 34°C by the end.

A typical May day in Ban Selaphum reaches about 34°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 37°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
123426
133426
143426
153426
163426
173426
183426
193426
203426
213426
223426
233426
243426
253426
263426
273426
283426
293426
303426
313426

How May really feels in Ban Selaphum

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.

Ban Selaphum 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
Jan31° / 18°61.611.25.9
Feb33° / 20°112.211.54.6
Mar35° / 24°366.411.93.0
Apr36° / 26°6911.912.32.1
May34° / 26°18321.712.72.0
Jun33° / 26°18422.312.92.2
Jul32° / 26°22424.312.92.4
Aug32° / 25°2582612.52.5
Sep31° / 25°25924.812.12.7
Oct31° / 24°1081211.64.1
Nov31° / 22°233.611.35.1
Dec30° / 19°51.311.16.2

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 10% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 14% 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 (%)
14753
24654
34456
44357
54159
63961
73763
83466
93268
103169
113070
122773
132575
142377
152278
162080
171981
181684
191585
201585
211486
221486
231288
241288
251288
261288
271387
281387
291387
301288
311189

Chance of precipitation in May

Any precipitation

Ban Selaphum gets around 183 mm of rain over 21.7 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 70% and peaks near 77% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
157
258
359
460
561
662
763
864
965
1066
1167
1268
1369
1469
1570
1671
1772
1873
1973
2074
2174
2275
2375
2476
2576
2676
2776
2877
2977
3077
3177

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 54% of days. Sticky, muggy-or-worse air turns up on roughly 99% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1186427
2176329
3166132
4165934
5155836
6155638
7145540
8145342
9135244
10135145
11125047
12124948
13124850
14124651
15114553
16114454
17114256
18114157
19113959
20113860
21113662
22113563
23013366
24003268
25003070
26002872
27002773
28002575
29002476
30002278
31002278

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
18calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
108calm
118calm
128calm
138calm
148calm
158calm
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 5:44 AM to 5:35 AM, and sunset from 6:18 PM to 6:28 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.65:446:18
212.65:446:19
312.65:436:19
412.65:436:19
512.65:426:19
612.65:426:20
712.65:416:20
812.75:416:20
912.75:416:21
1012.75:406:21
1112.75:406:21
1212.75:396:22
1312.75:396:22
1412.75:396:22
1512.75:386:22
1612.75:386:23
1712.85:386:23
1812.85:386:23
1912.85:376:24
2012.85:376:24
2112.85:376:24
2212.85:376:25
2312.85:366:25
2412.85:366:25
2512.85:366:26
2612.85:366:26
2712.85:366:26
2812.95:366:27
2912.95:366:27
3012.95:356:27
3112.95:356:28

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.57 kWh/m².

For context, solar energy here swings from a low near 4.45 kWh/m² to a high of 6.14 kWh/m² in April across the year — May's 5.57 kWh/m² falls in the middle.

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
125.6Bright
135.6Bright
145.6Bright
155.5Bright
165.5Bright
175.5Bright
185.5Bright
195.5Bright
205.5Bright
215.4Bright
225.4Bright
235.4Bright
245.4Bright
255.4Bright
265.4Bright
275.4Bright
285.4Bright
295.4Bright
305.4Bright
315.4Bright
Planning a trip in May

Hazard calendar for Ban Selaphum

In seasonPeak

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

Ban Selaphum'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 Ban Selaphum?

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

2.0
Sightseeing
12th-best month of the year
4.1
Beach & pool
8th-best month of the year

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

What to pack for Ban Selaphum in May

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

In May, Ban Selaphum sees daytime highs around 34°C and nights near 26°C. Pack light clothes and rain gear. Worth having: sun protection. About 22 days see rain.

light clothesrain gearsun protection

UV index in Ban Selaphum 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 Selaphum peaks around August 10 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 12 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 10UV 13Dec 12UV 8
UV index (midday)Level
Jan9Very high
Feb10Extreme
Mar12Extreme
Apr10Very high
May11Extreme
Jun12Extreme
Jul13Extreme
Aug13Extreme
Sep11Extreme
Oct11Extreme
Nov8Very high
Dec8Very high

Air quality in Ban Selaphum 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 Selaphum is worst in March — around 53 µg/m³ PM2.5 (poor), about 3.3× the cleanest month (December, 16 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateMar 1851 µg/m³Dec 1316 µg/m³
PM2.5 (µg/m³)Level
Jan22Moderate
Feb36Poor
Mar53Poor
Apr41Poor
May29Moderate
Jun23Moderate
Jul24Moderate
Aug25Moderate
Sep27Moderate
Oct24Moderate
Nov18Moderate
Dec16Moderate
Location & terrain

Where is Ban Selaphum?

Ban Selaphum sits at 16.0°N, 104.0°E, 133 m above sea level, in Thailand. The nearest listed city is Roi Et, 32 km away.

Topography around Ban Selaphum

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

Within 3 km, the terrain around Ban Selaphum has only modest variations in elevation — a maximum elevation change of 47 m around an average of 136 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 53 m; within 80 km, significant variations in elevation — a maximum elevation change of 471 m.

The land around Ban Selaphum is covered by cropland (62%) and trees (20%) within 3 km, cropland (74%) within 16 km, and cropland (73%) and trees (22%) within 80 km.

3 km
47 m
16 km
53 m
80 km
471 m
treesgrasslandcroplandartificial surfaceswater
May weather nearby: Roi Et 32 km · Yasothon 32 km · Kamalasai 54 km · Kaset Wisai 56 km · Kuchinarai 59 km · Kalasin 66 km · Maha Sarakham 72 km · Amnat Charoen 75 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 Ban Selaphum (16.0167°, 103.95°, elevation 133 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).