Nakhon Si Thammarat weather in May

In May, Nakhon Si Thammarat sees average daytime highs of 31°C and overnight lows near 26°C, with 123 mm of rain across 23.3 wet days and about 12.4 hours of daylight. It is the 1st-warmest and 6th-wettest month of the year here.

Day-to-day highs hold fairly steady near 31°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 18 min at the start of May to 12 h 30 min by month's end. Set against the rest of the year, May is Nakhon Si Thammarat's 7th-clearest and 10th-windiest month. For the whole year in context, see Nakhon Si Thammarat's year-round climate.

Daytime high
31°
1st warmest
Overnight low
26°
12th coldest
Rainfall
123 mm
23.3 wet days
Daylight
12 h 24 min
6:05 AM – 6:28 PM
Cloud cover
79%
7th clearest
Wind
6 km/h
10th windiest
Solar energy
5.46 kWh/m²
Travel score
2.9
out of 10

Nakhon Si Thammarat is city in Nakhon Si Thammarat province, Thailand.

Density
4,528/km²
people per km²
Founded
1910

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 31°C through the month.

A typical May day in Nakhon Si Thammarat reaches about 31°C in the afternoon and slips back to 26°C overnight — a 5°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)
13126
23126
33126
43126
53126
63126
73126
83126
93126
103126
113126
123126
133126
143126
153126
163126
173126
183126
193126
203126
213126
223126
233126
243126
253126
263126
273126
283126
293126
303126
313126

How May really feels in Nakhon Si Thammarat

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
heat index over the day's high
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.

Nakhon Si Thammarat weather by month

How May compares with the rest of the year at a glance. May is the 1st-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 24°12416.811.65.2
Feb29° / 24°589.911.75.5
Mar30° / 25°12013.711.94.7
Apr31° / 26°12016.812.23.8
May31° / 26°12323.312.42.9
Jun31° / 26°9321.112.53.1
Jul31° / 25°9721.412.43.2
Aug31° / 25°11722.712.33.2
Sep30° / 25°14925.9123.0
Oct29° / 25°27428.211.83.1
Nov28° / 25°35825.711.63.6
Dec28° / 24°2502011.54.7

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 12% of May, with mostly cloudy or overcast conditions the remaining 80%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13268
22971
32971
42971
52674
62674
72674
82476
92476
102278
112179
122080
132080
141981
151882
161882
171882
181684
191684
201585
211585
221486
231486
241486
251486
261486
271486
281387
291387
301288
311288

Chance of precipitation in May

Any precipitation

Nakhon Si Thammarat gets around 123 mm of rain over 23.3 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 76% and peaks near 79% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202531
Rain chance (%)
168
269
370
471
572
673
774
875
975
1076
1176
1276
1377
1477
1577
1677
1777
1877
1977
2076
2176
2276
2376
2477
2577
2677
2778
2878
2978
3079
3179

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 70% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
12575
22476
32476
42575
52575
62575
72674
82773
92773
102872
112971
122971
133070
143070
153070
163169
173169
183169
193268
203268
213367
223367
233466
243466
253466
263565
273565
283565
293565
303466
313466

Wind in May

Winds average 6 km/h in May.

Across May, daily wind ranges from about 6 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
17calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 12 h 18 min at the start of May to 12 h 30 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 6:09 AM to 6:04 AM, and sunset from 6:26 PM to 6:31 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.36:096:26
212.36:086:26
312.36:086:26
412.36:086:26
512.36:076:26
612.36:076:27
712.36:076:27
812.36:066:27
912.36:066:27
1012.46:066:27
1112.46:066:27
1212.46:066:27
1312.46:056:27
1412.46:056:28
1512.46:056:28
1612.46:056:28
1712.46:056:28
1812.46:056:28
1912.46:046:28
2012.46:046:29
2112.46:046:29
2212.46:046:29
2312.46:046:29
2412.46:046:29
2512.46:046:30
2612.46:046:30
2712.46:046:30
2812.46:046:30
2912.46:046:31
3012.46:046:31
3112.56:046:31

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 5.46 kWh/m².

For context, solar energy here swings from a low near 3.87 kWh/m² to a high of 6.01 kWh/m² in March across the year — May's 5.46 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.7Bright
25.7Bright
35.7Bright
45.6Bright
55.6Bright
65.6Bright
75.6Bright
85.6Bright
95.5Bright
105.5Bright
115.5Bright
125.5Bright
135.5Bright
145.5Bright
155.5Bright
165.4Bright
175.4Bright
185.4Bright
195.4Bright
205.4Bright
215.4Bright
225.4Bright
235.4Bright
245.3Bright
255.3Bright
265.3Bright
275.3Bright
285.3Bright
295.3Bright
305.3Bright
315.3Bright
Planning a trip in May

Hazard calendar for Nakhon Si Thammarat

In seasonPeak

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

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

Nakhon Si Thammarat's rainy season runs October–December, when most of the year's rain falls.

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

Is May a good time to visit Nakhon Si Thammarat?

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

2.9
Sightseeing
12th-best month of the year
4.5
Beach & pool
9th-best month of the year

May is a weaker month for outdoor sightseeing in Nakhon Si Thammarat.

What to pack for Nakhon Si Thammarat in May

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

In May, Nakhon Si Thammarat sees daytime highs around 31°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

Sea temperature near Nakhon Si Thammarat 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 28 km away) is warmest in May at about 31°C and coldest in January near 28°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
Jan28Warm
Feb28Tropical
Mar29Tropical
Apr30Tropical
May31Tropical
Jun30Tropical
Jul30Tropical
Aug30Tropical
Sep30Tropical
Oct29Tropical
Nov29Tropical
Dec28Tropical

UV index in Nakhon Si Thammarat in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Nakhon Si Thammarat peaks around August 22 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 10 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeAug 22UV 13Jan 10UV 10
UV index (midday)Level
Jan10Very high
Feb13Extreme
Mar13Extreme
Apr13Extreme
May13Extreme
Jun12Extreme
Jul11Extreme
Aug13Extreme
Sep13Extreme
Oct12Extreme
Nov10Extreme
Dec10Extreme

Air quality in Nakhon Si Thammarat 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 Nakhon Si Thammarat is worst in April — around 28 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1727 µg/m³Aug 1722 µg/m³
PM2.5 (µg/m³)Level
Jan24Moderate
Feb22Moderate
Mar24Moderate
Apr28Moderate
May25Moderate
Jun26Moderate
Jul24Moderate
Aug22Moderate
Sep24Moderate
Oct26Moderate
Nov25Moderate
Dec22Moderate
Location & terrain

Where is Nakhon Si Thammarat?

Nakhon Si Thammarat sits at 8.4°N, 100.0°E, 8 m above sea level, in Thailand. The nearest listed city is Pak Phanang, 27 km away.

Surat Thani

Topography around Nakhon Si Thammarat

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

Within 3 km, the terrain around Nakhon Si Thammarat has only modest variations in elevation — a maximum elevation change of 28 m around an average of 6 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 565 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,772 m.

The land around Nakhon Si Thammarat is covered by artificial surfaces (38%), trees (37%) and grassland (21%) within 3 km, trees (58%) within 16 km, and trees (59%) and water (34%) within 80 km.

3 km
28 m
16 km
565 m
80 km
1,772 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetlandmangroves
May weather nearby: Pak Phanang 27 km · Ron Phibun 31 km · Thung Song 43 km · Ban Na San 78 km · Huai Yot 80 km · Ranot 83 km · Phatthalung 91 km · Surat Thani 105 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 Nakhon Si Thammarat (8.4333°, 99.9667°, elevation 8 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).