Tha Bo weather in May

In May, Tha Bo sees average daytime highs of 34°C and overnight lows near 26°C, with 236 mm of rain across 22.7 wet days and about 12.8 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 33°C by the end. The sky is clear or mostly clear about 12% 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 13 hours by month's end. Set against the rest of the year, May is Tha Bo's 8th-clearest and 10th-windiest month. For the whole year in context, see Tha Bo's year-round climate.

Daytime high
34°
3rd warmest
Overnight low
26°
10th coldest
Rainfall
236 mm
22.7 wet days
Daylight
12 h 48 min
5:41 AM – 6:31 PM
Cloud cover
77%
8th clearest
Wind
6 km/h
10th windiest
Solar energy
5.3 kWh/m²
Travel score
2.1
out of 10

Tha Bo is town in Nong Khai province, Thailand.

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

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 33°C by the end.

A typical May day in Tha Bo 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 30°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
63426
73426
83426
93426
103426
113426
123426
133426
143426
153426
163426
173426
183326
193326
203326
213326
223326
233326
243326
253326
263326
273326
283326
293326
303326
313326

How May really feels in Tha Bo

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.

Tha Bo 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
Jan29° / 17°101.6116.9
Feb32° / 19°142.311.45.4
Mar34° / 22°356.111.93.5
Apr35° / 25°7211.712.42.4
May34° / 26°23622.712.82.1
Jun33° / 26°25224.1132.2
Jul32° / 26°29525.3132.4
Aug32° / 25°34426.812.62.4
Sep32° / 25°27424.312.12.6
Oct31° / 24°9811.711.64.2
Nov30° / 21°212.811.25.9
Dec29° / 18°81.2117.2

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 13% of May, with mostly cloudy or overcast conditions the remaining 75%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15050
24852
34852
44654
54456
64159
73961
83763
93664
103466
113268
123070
132872
142674
152476
162377
172080
181882
191684
201684
211486
221486
231387
241288
251288
261189
271189
281090
291090
30991
31892

Chance of precipitation in May

Any precipitation

Tha Bo gets around 236 mm of rain over 22.7 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 73% and peaks near 86% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%100%151015202531
Rain chance (%)
155
256
357
458
559
661
762
864
965
1067
1168
1270
1371
1473
1574
1675
1776
1877
1978
2079
2180
2281
2382
2483
2583
2684
2784
2885
2985
3086
3186

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 67% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1176329
2176032
3165835
4165637
5155440
6155044
7154847
8154550
9154252
10143956
11143659
12143461
13043165
14042967
15042769
16032572
17032374
18032176
19022078
20021979
21021880
22021781
23011683
24011584
25011485
26011386
27011287
28001189
29001090
30001090
3100991

Wind in May

Winds average 6 km/h in May.

Across May, daily wind ranges from about 5 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm
315calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 12 h 36 min at the start of May to 13 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 24 minutes over May. Sunrise moves from 5:48 AM to 5:38 AM, and sunset from 6:26 PM to 6:37 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.65:486:26
212.75:476:26
312.75:476:27
412.75:466:27
512.75:466:27
612.75:456:28
712.75:456:28
812.75:446:28
912.75:446:29
1012.85:436:29
1112.85:436:29
1212.85:426:30
1312.85:426:30
1412.85:426:30
1512.85:416:31
1612.85:416:31
1712.85:416:31
1812.95:406:32
1912.95:406:32
2012.95:406:32
2112.95:396:33
2212.95:396:33
2312.95:396:34
2412.95:396:34
2512.95:386:34
2612.95:386:35
2712.95:386:35
2813.05:386:35
2913.05:386:36
3013.05:386:36
3113.05:386:37

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.3 kWh/m².

For context, solar energy here swings from a low near 4.23 kWh/m² to a high of 6.08 kWh/m² in April across the year — May's 5.3 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.9Bright
25.8Bright
35.8Bright
45.8Bright
55.7Bright
65.7Bright
75.7Bright
85.6Bright
95.6Bright
105.5Bright
115.5Bright
125.4Bright
135.4Bright
145.3Bright
155.3Bright
165.3Bright
175.2Bright
185.2Bright
195.2Bright
205.1Bright
215.1Bright
225.1Bright
235.1Bright
245.0Bright
255.0Bright
265.0Bright
275.0Bright
285.0Bright
295.0Bright
304.9Bright
314.9Bright
Planning a trip in May

Hazard calendar for Tha Bo

In seasonPeak

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

Tha Bo sits in the Pacific typhoon belt; the season peaks July–October.

Tha Bo'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 Tha Bo?

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
4.2
Beach & pool
9th-best month of the year

May is a weaker month for outdoor sightseeing in Tha Bo.

What to pack for Tha Bo in May

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

In May, Tha Bo sees daytime highs around 34°C and nights near 26°C. Pack light clothes and rain gear. Worth having: sun protection. About 23 days see rain.

light clothesrain gearsun protection

UV index in Tha Bo 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 Tha Bo peaks around August 11 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 7 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highAug 11UV 13Dec 15UV 7
UV index (midday)Level
Jan8Very high
Feb10Very high
Mar12Extreme
Apr10Extreme
May11Extreme
Jun13Extreme
Jul13Extreme
Aug13Extreme
Sep11Extreme
Oct10Extreme
Nov8Very high
Dec7Very high

Air quality in Tha Bo 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 Tha Bo is worst in March — around 77 µg/m³ PM2.5 (unhealthy), about 3.4× the cleanest month (July, 23 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorUnhealthyModerateMar 2376 µg/m³Jul 2123 µg/m³
PM2.5 (µg/m³)Level
Jan31Moderate
Feb44Poor
Mar77Unhealthy
Apr73Unhealthy
May32Moderate
Jun24Moderate
Jul23Moderate
Aug23Moderate
Sep24Moderate
Oct26Moderate
Nov25Moderate
Dec26Moderate
Location & terrain

Where is Tha Bo?

Tha Bo sits at 17.9°N, 102.6°E, 182 m above sea level, in Thailand. The nearest listed city is Vientiane, 13 km away.

Topography around Tha Bo

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

Within 3 km, the terrain around Tha Bo has only modest variations in elevation — a maximum elevation change of 32 m around an average of 169 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 64 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,486 m.

The land around Tha Bo is covered by cropland (43%) and trees (28%) within 3 km, cropland (47%) and trees (32%) within 16 km, and trees (54%) and cropland (39%) within 80 km.

3 km
32 m
16 km
64 m
80 km
1,486 m
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Vientiane 13 km · Nong Khai 17 km · Nam Som 42 km · Kut Chap 47 km · Udon Thani 53 km · Phon Charoen 65 km · Na Klang 73 km · Nong Bua Lamphu 73 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 Tha Bo (17.85°, 102.5814°, elevation 182 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).