Trang weather in September

In September, Trang sees average daytime highs of 30°C and overnight lows near 25°C, with 274 mm of rain across 25.6 wet days and about 12 hours of daylight. It is the 12th-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 3% of the time in September, and the air most often feels miserable.

Daylight stretches from about 12 h 06 min at the start of September to 11 h 54 min by month's end. Set against the rest of the year, September is Trang's 11th-clearest and 6th-windiest month. For the whole year in context, see Trang's year-round climate.

Daytime high
30°
12th warmest
Overnight low
25°
7th coldest
Rainfall
274 mm
25.6 wet days
Daylight
12 hours
6:15 AM – 6:17 PM
Cloud cover
87%
11th clearest
Wind
8 km/h
6th windiest
Solar energy
4.8 kWh/m²
Travel score
2.9
out of 10

Trang is city in Trang province, Thailand.

Density
4,517/km²
people per km²

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

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 30°C through the month.

A typical September day in Trang reaches about 30°C in the afternoon and slips back to 25°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 32°C. Set against its neighbours, September runs on par with August and on par with October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13025
23025
33025
43025
53025
63025
73025
83025
93025
103025
113025
123025
133025
143025
153025
163025
173025
183025
193025
203025
213025
223024
233024
243024
253024
263024
273024
283024
293024
303024

How September really feels in Trang

Once humidity and wind are folded in, September averages 30 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
30
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Trang weather by month

How September compares with the rest of the year at a glance. September is the 12th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 24°466.311.64.3
Feb33° / 24°253.911.83.9
Mar33° / 24°8711.111.93.1
Apr33° / 25°16121.112.22.6
May32° / 25°22425.812.32.6
Jun31° / 25°2052312.43.0
Jul30° / 25°21923.412.43.1
Aug30° / 25°24725.512.23.0
Sep30° / 25°27425.6122.9
Oct30° / 24°33927.911.82.8
Nov30° / 24°24022.311.73.2
Dec30° / 24°13313.411.64.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 3% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 5% of September, with mostly cloudy or overcast conditions the remaining 92%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1892
2892
3892
4892
5892
6892
7892
8892
9793
10892
11892
12892
13892
14892
15991
16991
17991
18991
19991
20991
21991
22991
23793
24793
25793
26793
27793
28793
29694
30595

Chance of precipitation in September

Any precipitation

Trang gets around 274 mm of rain over 25.6 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 86% and peaks near 90% on the wettest days.

0%20%40%60%80%100%151015202530
Rain chance (%)
184
284
384
484
584
684
784
885
985
1085
1185
1285
1385
1485
1585
1685
1785
1885
1985
2086
2186
2286
2387
2487
2588
2688
2789
2889
2990
3090

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels miserable — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the miserable band about 81% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Oppressive (%)Miserable (%)
12080
22080
32080
42179
52179
62278
72278
82278
92278
102278
112278
122179
132179
142080
152080
161981
171882
181882
191783
201684
211684
221684
231684
241684
251684
261684
271783
281783
291882
301882

Wind in September

Winds average 8 km/h in September.

Across September, 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.

0246810151015202530
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
257calm
267calm
277calm
287calm
297calm
307calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 06 min at the start of September to 11 h 54 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 12 minutes over September. Sunrise moves from 6:17 AM to 6:13 AM, and sunset from 6:26 PM to 6:09 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.16:176:26
212.16:176:25
312.16:176:25
412.16:166:24
512.16:166:23
612.16:166:23
712.16:166:22
812.16:166:22
912.16:166:21
1012.16:166:21
1112.16:156:20
1212.16:156:19
1312.16:156:19
1412.16:156:18
1512.06:156:18
1612.06:156:17
1712.06:146:17
1812.06:146:16
1912.06:146:15
2012.06:146:15
2112.06:146:14
2212.06:146:14
2312.06:146:13
2412.06:136:12
2512.06:136:12
2612.06:136:11
2712.06:136:11
2812.06:136:10
2911.96:136:10
3011.96:136:09

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.8 kWh/m².

For context, solar energy here swings from a low near 4.15 kWh/m² to a high of 6.08 kWh/m² in March across the year — September's 4.8 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.9Bright
24.9Bright
34.9Bright
44.9Bright
54.9Bright
64.9Bright
74.9Bright
84.9Bright
94.9Bright
104.8Bright
114.8Bright
124.8Bright
134.8Bright
144.8Bright
154.8Bright
164.8Bright
174.8Bright
184.7Bright
194.7Bright
204.7Bright
214.7Bright
224.7Bright
234.7Bright
244.7Bright
254.6Bright
264.6Bright
274.6Bright
284.6Bright
294.5Bright
304.5Bright
Planning a trip in September

Hazard calendar for Trang

In seasonPeak

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

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

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

Is September a good time to visit Trang?

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

2.9
Sightseeing
9th-best month of the year
4.0
Beach & pool
10th-best month of the year

September is a weaker month for outdoor sightseeing in Trang.

What to pack for Trang in September

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

In September, Trang sees daytime highs around 30°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 26 days see rain.

light clothesrain gearsun protection

Sea temperature near Trang in September

The nearest coast averages about 29°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 33 km away) is warmest in May at about 30°C and coldest in January near 29°C.

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

28°30°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan29Tropical
Feb29Tropical
Mar30Tropical
Apr30Tropical
May30Tropical
Jun30Tropical
Jul30Tropical
Aug30Tropical
Sep29Tropical
Oct29Tropical
Nov29Tropical
Dec29Tropical

UV index in Trang in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September 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 Trang peaks around February 22 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 22 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeFeb 22UV 13Nov 22UV 10
UV index (midday)Level
Jan11Extreme
Feb13Extreme
Mar13Extreme
Apr13Extreme
May12Extreme
Jun12Extreme
Jul11Extreme
Aug13Extreme
Sep13Extreme
Oct12Extreme
Nov10Extreme
Dec10Extreme

Air quality in Trang in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Trang is worst in April — around 24 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1624 µg/m³Feb 1319 µg/m³
PM2.5 (µg/m³)Level
Jan20Moderate
Feb18Moderate
Mar22Moderate
Apr24Moderate
May21Moderate
Jun22Moderate
Jul21Moderate
Aug18Moderate
Sep21Moderate
Oct22Moderate
Nov22Moderate
Dec20Moderate
Location & terrain

Where is Trang?

Trang sits at 7.6°N, 99.6°E, 27 m above sea level, in Thailand. The nearest listed city is Huai Yot, 26 km away.

Ko Phi PhiKrabi

Topography around Trang

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

Within 3 km, the terrain around Trang has only modest variations in elevation — a maximum elevation change of 49 m around an average of 14 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 397 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,334 m.

The land around Trang is covered by trees (49%) and artificial surfaces (32%) within 3 km, trees (82%) within 16 km, and trees (63%) and water (29%) within 80 km.

3 km
49 m
16 km
397 m
80 km
1,334 m
treesgrasslandcroplandartificial surfaceswatermangroves
September weather nearby: Huai Yot 26 km · Phatthalung 52 km · Ko Lanta 58 km · Thung Song 68 km · Ron Phibun 74 km · Ranot 82 km · Ko Phi Phi 95 km · Krabi 96 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 Trang (7.5563°, 99.6114°, elevation 27 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).