Bo Phloi weather in May

In May, Bo Phloi sees average daytime highs of 35°C and overnight lows near 26°C, with 135 mm of rain across 21.5 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 36°C in the first days to 34°C by the end. The sky is clear or mostly clear about 9% of the time in May, and the air most often feels oppressive.

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 Bo Phloi's 8th-clearest and 6th-windiest month. For the whole year in context, see Bo Phloi's year-round climate.

Daytime high
35°
3rd warmest
Overnight low
26°
12th coldest
Rainfall
135 mm
21.5 wet days
Daylight
12 h 42 min
5:58 AM – 6:38 PM
Cloud cover
79%
8th clearest
Wind
8 km/h
6th windiest
Solar energy
5.51 kWh/m²
Travel score
1.8
out of 10

Temperature in May

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 36°C in the first days to 34°C by the end.

A typical May day in Bo Phloi 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 31°C and 38°C. Set against its neighbours, May runs about 2°C cooler than April and about 2°C warmer than June.

20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13626
23626
33626
43626
53626
63626
73626
83626
93526
103526
113526
123526
133526
143526
153526
163526
173526
183526
193526
203426
213426
223426
233426
243426
253426
263426
273426
283426
293426
303426
313426

How May really feels in Bo Phloi

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.

Bo Phloi 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
Jan32° / 21°142.511.25.1
Feb34° / 22°142.811.53.7
Mar36° / 24°417.411.92.3
Apr37° / 26°8213.812.31.6
May35° / 26°13521.512.71.8
Jun33° / 26°12921.312.82.2
Jul32° / 25°16122.612.82.6
Aug32° / 25°1572312.52.7
Sep32° / 25°21224.312.12.5
Oct31° / 24°1702011.73.4
Nov31° / 23°366.111.34.8
Dec31° / 21°91.811.25.6

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 9% 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 79%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14159
24060
33862
43763
53763
63466
73367
83169
92971
102872
112674
122476
132278
142080
152080
161882
171783
181585
191486
201387
211288
221288
231189
241189
251189
261189
271090
28991
29991
30991
31991

Chance of precipitation in May

Any precipitation

Bo Phloi gets around 135 mm of rain over 21.5 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 69% and peaks near 74% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
161
261
362
462
563
663
764
865
966
1067
1168
1269
1370
1471
1572
1673
1773
1873
1974
2074
2173
2273
2373
2473
2572
2672
2772
2872
2972
3072
3172

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

0%25%50%75%100%151015202531
Muggy (%)Oppressive (%)Miserable (%)
186923
286824
386725
476726
576627
666628
766529
856629
956530
1046630
1146531
1236631
1336532
1426632
1526533
1626533
1716633
1816633
1916633
2016633
2106733
2206733
2306832
2406832
2506931
2606931
2707030
2807030
2907129
3007228
3107228

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
167calm
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 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 6:04 AM to 5:56 AM, and sunset from 6:34 PM to 6:43 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.56:046:34
212.56:046:35
312.56:036:35
412.56:036:35
512.66:026:35
612.66:026:35
712.66:016:36
812.66:016:36
912.66:016:36
1012.66:006:36
1112.66:006:37
1212.66:006:37
1312.65:596:37
1412.65:596:37
1512.75:596:38
1612.75:586:38
1712.75:586:38
1812.75:586:39
1912.75:586:39
2012.75:576:39
2112.75:576:40
2212.75:576:40
2312.75:576:40
2412.75:576:40
2512.75:576:41
2612.75:566:41
2712.85:566:41
2812.85:566:42
2912.85:566:42
3012.85:566:42
3112.85:566:43

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.51 kWh/m².

For context, solar energy here swings from a low near 4.24 kWh/m² to a high of 6.26 kWh/m² in April across the year — May's 5.51 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.0Bright
26.0Bright
35.9Bright
45.9Bright
55.9Bright
65.8Bright
75.8Bright
85.8Bright
95.7Bright
105.7Bright
115.6Bright
125.6Bright
135.5Bright
145.5Bright
155.5Bright
165.4Bright
175.4Bright
185.4Bright
195.4Bright
205.3Bright
215.3Bright
225.3Bright
235.3Bright
245.3Bright
255.3Bright
265.3Bright
275.3Bright
285.3Bright
295.2Bright
305.2Bright
315.2Bright
Planning a trip in May

Hazard calendar for Bo Phloi

In seasonPeak

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

Bo Phloi'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 Bo Phloi?

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

1.8
Sightseeing
11th-best month of the year
3.9
Beach & pool
12th-best month of the year

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

What to pack for Bo Phloi in May

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

In May, Bo Phloi sees daytime highs around 35°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 Bo Phloi 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 Bo Phloi peaks around August 16 at about 14 (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 16UV 14Dec 12UV 8
UV index (midday)Level
Jan9Very high
Feb10Very high
Mar13Extreme
Apr11Extreme
May12Extreme
Jun12Extreme
Jul13Extreme
Aug14Extreme
Sep12Extreme
Oct11Extreme
Nov9Very high
Dec8Very high

Air quality in Bo Phloi 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 Bo Phloi is worst in March — around 57 µg/m³ PM2.5 (unhealthy), about 2.7× the cleanest month (June, 21 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorPoorModerateMar 1356 µg/m³Jun 2221 µg/m³
PM2.5 (µg/m³)Level
Jan45Poor
Feb53Poor
Mar57Unhealthy
Apr43Poor
May30Moderate
Jun21Moderate
Jul22Moderate
Aug22Moderate
Sep26Moderate
Oct33Moderate
Nov32Moderate
Dec33Moderate
Location & terrain

Where is Bo Phloi?

Bo Phloi sits at 14.3°N, 99.5°E, 96 m above sea level, in Thailand. The nearest listed city is Kanchanaburi, 36 km away.

Topography around Bo Phloi

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

Within 3 km, the terrain around Bo Phloi has only modest variations in elevation — a maximum elevation change of 244 m around an average of 104 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 574 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,266 m.

The land around Bo Phloi is covered by trees (50%) and grassland (20%) within 3 km, cropland (55%) and trees (31%) within 16 km, and trees (47%) and cropland (44%) within 80 km.

3 km
244 m
16 km
574 m
80 km
1,266 m
treesgrasslandcroplandartificial surfacesbare terrainwater
May weather nearby: Kanchanaburi 36 km · Tha Muang 43 km · Tha Maka 55 km · Suphan Buri 67 km · Ban Pong 69 km · Bang Len 78 km · Chom Bueng 79 km · Photharam 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 Bo Phloi (14.3252°, 99.5147°, elevation 96 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).