Samut Prakan weather in May

In May, Samut Prakan sees average daytime highs of 32°C and overnight lows near 28°C, with 124 mm of rain across 18.2 wet days and about 12.6 hours of daylight. It is the 2nd-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 13% 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 Samut Prakan's 8th-clearest and 7th-windiest month. For the whole year in context, see Samut Prakan's year-round climate.

Daytime high
32°
2nd warmest
Overnight low
28°
12th coldest
Rainfall
124 mm
18.2 wet days
Daylight
12 h 36 min
5:55 AM – 6:33 PM
Cloud cover
77%
8th clearest
Wind
13 km/h
7th windiest
Solar energy
5.7 kWh/m²
Travel score
3.2
out of 10

Samut Prakan is city in Samut Prakan province, Thailand.

Air quality
High
PM2.5 25.8 µg/m³ · 2019

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 Samut Prakan 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 33°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 Samut Prakan

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.

Samut Prakan weather by month

How May compares with the rest of the year at a glance. May is the 2nd-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 24°15311.36.5
Feb30° / 26°122.611.56.2
Mar31° / 27°385.911.95.3
Apr32° / 28°679.712.34.2
May32° / 28°12418.212.63.2
Jun31° / 28°10020.112.83.0
Jul31° / 28°1072112.73.2
Aug31° / 27°11421.612.53.2
Sep30° / 27°21224.512.13.0
Oct30° / 26°2082111.73.7
Nov30° / 25°436.311.45.2
Dec30° / 24°101.711.26.3

Cloud cover in May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 13% 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 76%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14654
24555
34456
44159
54060
63862
73565
83367
93169
102971
112872
122575
132575
142278
152278
162080
171981
181882
191783
201684
211585
221585
231585
241486
251486
261486
271387
281387
291387
301189
311189

Chance of precipitation in May

Any precipitation

Samut Prakan gets around 124 mm of rain over 18.2 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 59% and peaks near 66% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
145
246
347
448
549
650
751
852
954
1055
1157
1258
1360
1461
1562
1663
1763
1864
1964
2064
2165
2265
2365
2465
2565
2665
2765
2865
2965
3066
3166

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 96% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
1496
2496
3496
4496
5496
6397
7397
8397
9397
10496
11496
12496
13496
14496
15496
16496
17496
18496
19496
20496
21496
22496
23496
24595
25595
26595
27595
28595
29595
30694
31694

Wind in May

Winds average 13 km/h in May.

Across May, daily wind ranges from about 13 km/h on the calmest days to 14 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
114light breeze
214light breeze
314light breeze
414light breeze
514light breeze
614light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze
3113light breeze

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 6:00 AM to 5:53 AM, and sunset from 6:29 PM to 6:37 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.56:006:29
212.56:006:29
312.56:006:30
412.55:596:30
512.55:596:30
612.55:586:30
712.55:586:30
812.65:586:31
912.65:576:31
1012.65:576:31
1112.65:566:31
1212.65:566:32
1312.65:566:32
1412.65:566:32
1512.65:556:32
1612.65:556:33
1712.65:556:33
1812.65:556:33
1912.75:546:34
2012.75:546:34
2112.75:546:34
2212.75:546:34
2312.75:546:35
2412.75:536:35
2512.75:536:35
2612.75:536:36
2712.75:536:36
2812.75:536:36
2912.75:536:36
3012.75:536:37
3112.75:536:37

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.7 kWh/m².

For context, solar energy here swings from a low near 4.66 kWh/m² to a high of 6.31 kWh/m² in April across the year — May's 5.7 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.0Intense
26.0Intense
36.0Bright
46.0Bright
55.9Bright
65.9Bright
75.9Bright
85.8Bright
95.8Bright
105.8Bright
115.8Bright
125.7Bright
135.7Bright
145.7Bright
155.7Bright
165.6Bright
175.6Bright
185.6Bright
195.6Bright
205.6Bright
215.6Bright
225.6Bright
235.6Bright
245.6Bright
255.6Bright
265.6Bright
275.6Bright
285.6Bright
295.5Bright
305.5Bright
315.5Bright
Planning a trip in May

Hazard calendar for Samut Prakan

In seasonPeak

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

Samut Prakan sits in the Pacific typhoon belt; the season peaks July–October.

Samut Prakan's monsoon runs May–October, 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 Samut Prakan?

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

3.2
Sightseeing
8th-best month of the year
5.1
Beach & pool
8th-best month of the year

May is a weaker month for outdoor sightseeing in Samut Prakan.

What to pack for Samut Prakan in May

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

In May, Samut Prakan sees daytime highs around 32°C and nights near 28°C. Pack light clothes and rain gear. Worth having: sun protection. About 18 days see rain.

light clothesrain gearsun protection

Sea temperature near Samut Prakan 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 25 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
Feb28Tropical
Mar29Tropical
Apr30Tropical
May31Tropical
Jun30Tropical
Jul30Tropical
Aug30Tropical
Sep29Tropical
Oct29Tropical
Nov29Tropical
Dec28Warm

UV index in Samut Prakan 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 Samut Prakan peaks around August 16 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 21 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 13Nov 21UV 8
UV index (midday)Level
Jan9Very high
Feb9Very high
Mar12Extreme
Apr12Extreme
May11Extreme
Jun12Extreme
Jul12Extreme
Aug13Extreme
Sep12Extreme
Oct9Very high
Nov8Very high
Dec8Very high

Air quality in Samut Prakan 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 Samut Prakan is worst in January — around 40 µg/m³ PM2.5 (poor), about 2.5× the cleanest month (August, 16 µg/m³).

Seasonal pattern from CAMS reanalysis, scaled to Samut Prakan's WHO annual average of 25.8 µg/m³.

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModeratePoorJan 1539 µg/m³Aug 1016 µg/m³
PM2.5 (µg/m³)Level
Jan40Poor
Feb34Moderate
Mar24Moderate
Apr22Moderate
May19Moderate
Jun16Moderate
Jul16Moderate
Aug16Moderate
Sep21Moderate
Oct31Moderate
Nov35Poor
Dec36Poor
Location & terrain

Where is Samut Prakan?

Samut Prakan sits at 13.6°N, 100.6°E, 2 m above sea level, in Thailand. The nearest listed city is Bang Na, 9.0 km away.

Topography around Samut Prakan

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

Within 3 km, the terrain around Samut Prakan has only modest variations in elevation — a maximum elevation change of 13 m around an average of 4 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 39 m; within 80 km, large variations in elevation — a maximum elevation change of 874 m.

The land around Samut Prakan is covered by artificial surfaces (58%) within 3 km, artificial surfaces (43%) and water (33%) within 16 km, and water (33%), cropland (24%) and trees (20%) within 80 km.

3 km
13 m
16 km
39 m
80 km
874 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetlandmangroves
May weather nearby: Bang Na 9.0 km · Phra Pradaeng 10 km · Thung Khru 10 km · Phra Khanong 12 km · Chong Nonsi 12 km · Yan Nawa 12 km · Khlong Toei 13 km · Rat Burana 14 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 Samut Prakan (13.5976°, 100.5972°, elevation 2 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).