Phetchaburi weather in May

In May, Phetchaburi sees average daytime highs of 32°C and overnight lows near 28°C, with 93 mm of rain across 17.2 wet days and about 12.6 hours of daylight. It is the 1st-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 32°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 30 min at the start of May to 12 h 42 min by month's end. Set against the rest of the year, May is Phetchaburi's 8th-clearest and 7th-windiest month. For the whole year in context, see Phetchaburi's year-round climate.

Daytime high
32°
1st warmest
Overnight low
28°
12th coldest
Rainfall
93 mm
17.2 wet days
Daylight
12 h 36 min
5:58 AM – 6:35 PM
Cloud cover
78%
8th clearest
Wind
11 km/h
7th windiest
Solar energy
5.64 kWh/m²
Travel score
3.1
out of 10

Phetchaburi is town in Phetchaburi province, Thailand.

Density
8,630/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 32°C through the month.

A typical May day in Phetchaburi reaches about 32°C in the afternoon and slips back to 28°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 34°C. Set against its neighbours, May runs on par with April and on par with June.

25°28°30°33°35°151015202531
Avg high (°C)Avg low (°C)
13228
23228
33228
43228
53228
63228
73228
83228
93228
103228
113228
123228
133228
143228
153228
163228
173228
183228
193228
203228
213228
223228
233228
243228
253228
263228
273228
283228
293228
303228
313228

How May really feels in Phetchaburi

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
11 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.

Phetchaburi weather by month

How May compares with the rest of the year at a glance. May is the 1st-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 24°142.311.36.9
Feb30° / 25°91.811.66.4
Mar31° / 26°42511.95.3
Apr32° / 28°538.712.34.1
May32° / 28°9317.212.63.1
Jun32° / 27°6615.412.83.2
Jul31° / 27°8317.112.73.3
Aug31° / 27°9118.712.43.4
Sep30° / 26°15120.912.13.2
Oct30° / 26°24822.611.73.7
Nov30° / 25°637.711.45.5
Dec29° / 24°142.111.26.8

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 11% of May, with mostly cloudy or overcast conditions the remaining 78%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14456
24456
34159
43961
53664
63664
73466
83169
93169
102872
112674
122575
132377
142278
152080
162080
171882
181783
191684
201585
211486
221387
231387
241288
251288
261189
271090
281090
291090
30991
31991

Chance of precipitation in May

Any precipitation

Phetchaburi gets around 93 mm of rain over 17.2 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 55% and peaks near 59% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
145
247
348
449
549
650
751
852
953
1054
1155
1255
1356
1456
1557
1657
1757
1858
1958
2058
2159
2259
2359
2459
2558
2658
2758
2858
2957
3057
3157

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 60% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
12971
22971
32971
42971
52971
63070
73070
83169
93268
103367
113565
123664
133862
143961
154159
164258
174357
184456
194555
204654
214654
224753
234753
244753
254753
264753
274753
284753
294753
304753
314753

Wind in May

Winds average 11 km/h in May.

Across May, daily wind ranges from about 10 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (km/h)Feels
112calm
212calm
312calm
412calm
512calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm
3110calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 12 h 30 min at the start of May to 12 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 12 minutes over May. Sunrise moves from 6:04 AM to 5:56 AM, and sunset from 6:31 PM to 6:39 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.56:046:31
212.56:036:31
312.56:036:32
412.56:026:32
512.56:026:32
612.56:026:32
712.56:016:32
812.56:016:33
912.56:006:33
1012.66:006:33
1112.66:006:33
1212.65:596:34
1312.65:596:34
1412.65:596:34
1512.65:596:34
1612.65:586:35
1712.65:586:35
1812.65:586:35
1912.65:586:35
2012.65:576:36
2112.65:576:36
2212.75:576:36
2312.75:576:37
2412.75:576:37
2512.75:576:37
2612.75:576:37
2712.75:576:38
2812.75:566:38
2912.75:566:38
3012.75:566:39
3112.75:566:39

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.64 kWh/m².

For context, solar energy here swings from a low near 4.5 kWh/m² to a high of 6.36 kWh/m² in April across the year — May's 5.64 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.1Intense
26.0Intense
36.0Intense
46.0Bright
55.9Bright
65.9Bright
75.9Bright
85.8Bright
95.8Bright
105.8Bright
115.7Bright
125.7Bright
135.7Bright
145.6Bright
155.6Bright
165.6Bright
175.5Bright
185.5Bright
195.5Bright
205.5Bright
215.5Bright
225.5Bright
235.5Bright
245.5Bright
255.5Bright
265.4Bright
275.4Bright
285.4Bright
295.4Bright
305.4Bright
315.4Bright
Planning a trip in May

Hazard calendar for Phetchaburi

In seasonPeak

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

Phetchaburi sits in the North Indian Ocean cyclone zone; the season peaks May and October–November.

Phetchaburi's monsoon runs September–October, when most of the year's rain falls.

Cyclone
Monsoon
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is May a good time to visit Phetchaburi?

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

3.1
Sightseeing
12th-best month of the year
5.2
Beach & pool
7th-best month of the year

May is a weaker month for outdoor sightseeing in Phetchaburi.

What to pack for Phetchaburi in May

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

In May, Phetchaburi sees daytime highs around 32°C and nights near 28°C. Pack light clothes and rain gear. Worth having: sun protection. About 17 days see rain.

light clothesrain gearsun protection

Sea temperature near Phetchaburi in May

The nearest coast averages about 31°C in May — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 20 km away) is warmest in May at about 31°C and coldest in January near 27°C.

The water stays above 20°C all year — warm enough for a swim any month.

26°28°30°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb28Warm
Mar29Tropical
Apr30Tropical
May31Tropical
Jun30Tropical
Jul30Tropical
Aug30Tropical
Sep29Tropical
Oct29Tropical
Nov29Tropical
Dec28Warm

UV index in Phetchaburi 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 Phetchaburi peaks around August 16 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 9 (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 14Jan 1UV 9
UV index (midday)Level
Jan9Very high
Feb9Very high
Mar13Extreme
Apr12Extreme
May12Extreme
Jun12Extreme
Jul12Extreme
Aug14Extreme
Sep12Extreme
Oct10Extreme
Nov9Very high
Dec9Very high

Air quality in Phetchaburi 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 Phetchaburi is worst in February — around 34 µg/m³ PM2.5 (moderate), about 2.5× the cleanest month (August, 14 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateFeb 2234 µg/m³Aug 2014 µg/m³
PM2.5 (µg/m³)Level
Jan32Moderate
Feb34Moderate
Mar34Moderate
Apr31Moderate
May19Moderate
Jun14Moderate
Jul15Moderate
Aug14Moderate
Sep14Moderate
Oct22Moderate
Nov27Moderate
Dec29Moderate
Location & terrain

Where is Phetchaburi?

Phetchaburi sits at 13.1°N, 99.9°E, 7 m above sea level, in Thailand. The nearest listed city is Tha Yang, 18 km away.

Topography around Phetchaburi

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

Within 3 km, the terrain around Phetchaburi has only modest variations in elevation — a maximum elevation change of 102 m around an average of 8 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 246 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,232 m.

The land around Phetchaburi is covered by artificial surfaces (40%), trees (29%) and cropland (21%) within 3 km, cropland (46%) within 16 km, and trees (44%) and water (34%) within 80 km.

3 km
102 m
16 km
246 m
80 km
1,232 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetlandmangroves
May weather nearby: Tha Yang 18 km · Khao Yoi 19 km · Samut Songkhram 34 km · Cha-am 35 km · Damnoen Saduak 45 km · Ratchaburi 49 km · Ban Phaeo 56 km · Samut Sakhon 60 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 Phetchaburi (13.1119°, 99.9447°, elevation 7 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). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).