Ubon Ratchathani weather in May

In May, Ubon Ratchathani sees average daytime highs of 34°C and overnight lows near 26°C, with 181 mm of rain across 22.4 wet days and about 12.7 hours of daylight. It is the 3rd-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 34°C through the month. The sky is clear or mostly clear about 8% of the time in May, and the air most often feels miserable.

Daylight stretches from about 12 h 30 min at the start of May to 12 h 48 min by month's end. Set against the rest of the year, May is Ubon Ratchathani's 8th-clearest and 11th-windiest month. For the whole year in context, see Ubon Ratchathani's year-round climate.

Daytime high
34°
3rd warmest
Overnight low
26°
12th coldest
Rainfall
181 mm
22.4 wet days
Daylight
12 h 42 min
5:36 AM – 6:18 PM
Cloud cover
79%
8th clearest
Wind
7 km/h
11th windiest
Solar energy
5.52 kWh/m²
Travel score
2.1
out of 10

Ubon Ratchathani is city in Ubon Ratchathani province, Thailand.

Density
4,219/km²
people per km²

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 34°C through the month.

A typical May day in Ubon Ratchathani 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
73426
83426
93426
103426
113426
123426
133426
143426
153426
163426
173426
183426
193426
203426
213426
223426
233426
243426
253326
263326
273326
283326
293326
303326
313326

How May really feels in Ubon Ratchathani

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.

Ubon Ratchathani 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° / 19°51.411.25.8
Feb33° / 21°101.911.54.5
Mar35° / 24°356.311.93.0
Apr35° / 26°811312.32.2
May34° / 26°18122.412.72.1
Jun33° / 26°19423.312.92.3
Jul32° / 25°23226.312.82.4
Aug31° / 25°2702712.52.5
Sep31° / 25°27325.612.12.6
Oct31° / 24°1241511.73.9
Nov31° / 22°314.711.35.2
Dec30° / 19°61.311.16.1

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 8% 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 79%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14456
24258
34159
43961
53664
63565
73268
83169
92971
102773
112575
122377
132179
141981
151882
161882
171684
181585
191486
201387
211288
221189
231090
241090
251090
261090
271090
281090
29991
30991
31991

Chance of precipitation in May

Any precipitation

Ubon Ratchathani gets around 181 mm of rain over 22.4 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 72% 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 (%)
161
262
363
464
565
666
767
868
969
1070
1171
1271
1372
1473
1573
1674
1774
1875
1975
2075
2175
2275
2375
2475
2576
2676
2776
2876
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 65% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1165340
2055342
3055144
4044947
5034849
6034651
7024553
8024454
9014257
10014158
11113959
12113860
13113662
14113563
15103366
16103267
17103168
18102970
19102871
20102772
21102673
22002575
23002476
24002377
25002278
26002179
27002080
28001981
29001981
30001882
31001882

Wind in May

Winds average 7 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.

0246810151015202531
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm
318calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 12 h 30 min at the start of May to 12 h 48 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 5:42 AM to 5:33 AM, and sunset from 6:14 PM to 6:23 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.55:426:14
212.65:416:14
312.65:416:14
412.65:406:15
512.65:406:15
612.65:396:15
712.65:396:15
812.65:386:16
912.65:386:16
1012.65:386:16
1112.75:376:17
1212.75:376:17
1312.75:376:17
1412.75:366:17
1512.75:366:18
1612.75:366:18
1712.75:356:18
1812.75:356:19
1912.75:356:19
2012.75:356:19
2112.85:346:20
2212.85:346:20
2312.85:346:20
2412.85:346:21
2512.85:346:21
2612.85:346:21
2712.85:336:22
2812.85:336:22
2912.85:336:22
3012.85:336:23
3112.85:336:23

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.52 kWh/m².

For context, solar energy here swings from a low near 4.35 kWh/m² to a high of 6.13 kWh/m² in April across the year — May's 5.52 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
85.7Bright
95.7Bright
105.7Bright
115.6Bright
125.6Bright
135.6Bright
145.5Bright
155.5Bright
165.5Bright
175.5Bright
185.4Bright
195.4Bright
205.4Bright
215.4Bright
225.4Bright
235.3Bright
245.3Bright
255.3Bright
265.3Bright
275.3Bright
285.3Bright
295.3Bright
305.3Bright
315.3Bright
Planning a trip in May

Hazard calendar for Ubon Ratchathani

In seasonPeak

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

Ubon Ratchathani'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 Ubon Ratchathani?

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

2.1
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 Ubon Ratchathani.

What to pack for Ubon Ratchathani in May

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

In May, Ubon Ratchathani 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 Ubon Ratchathani 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 Ubon Ratchathani peaks around August 12 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 10 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 10UV 8
UV index (midday)Level
Jan9Very high
Feb10Very high
Mar11Extreme
Apr11Extreme
May11Extreme
Jun12Extreme
Jul13Extreme
Aug13Extreme
Sep11Extreme
Oct11Extreme
Nov8Very high
Dec8Very high

Air quality in Ubon Ratchathani 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 Ubon Ratchathani is worst in March — around 61 µg/m³ PM2.5 (unhealthy), about 4.2× the cleanest month (December, 15 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorPoorModerateMar 1759 µg/m³Dec 1315 µg/m³
PM2.5 (µg/m³)Level
Jan23Moderate
Feb42Poor
Mar61Unhealthy
Apr43Poor
May26Moderate
Jun20Moderate
Jul21Moderate
Aug21Moderate
Sep24Moderate
Oct24Moderate
Nov18Moderate
Dec15Moderate
Location & terrain

Where is Ubon Ratchathani?

Ubon Ratchathani sits at 15.2°N, 104.8°E, 125 m above sea level, in Thailand. The nearest listed city is Warin Chamrap, 5.0 km away.

YasothonPakse

Topography around Ubon Ratchathani

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

Within 3 km, the terrain around Ubon Ratchathani has only modest variations in elevation — a maximum elevation change of 29 m around an average of 120 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 52 m; within 80 km, significant variations in elevation — a maximum elevation change of 458 m.

The land around Ubon Ratchathani is covered by artificial surfaces (47%) and trees (33%) within 3 km, trees (46%) and cropland (36%) within 16 km, and cropland (68%) and trees (26%) within 80 km.

3 km
29 m
16 km
52 m
80 km
458 m
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Warin Chamrap 5.0 km · Phibun Mangsahan 41 km · Det Udom 44 km · Si Sa Ket 57 km · Kantharalak 70 km · Amnat Charoen 73 km · Yasothon 97 km · Pakse 103 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 Ubon Ratchathani (15.2384°, 104.8487°, elevation 125 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).