Phan Thong weather in September

In September, Phan Thong sees average daytime highs of 32°C and overnight lows near 26°C, with 257 mm of rain across 25.9 wet days and about 12.1 hours of daylight. It is the 10th-warmest and 1st-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 2% of the time in September, and the air most often feels miserable.

Daylight stretches from about 12 h 18 min at the start of September to 11 h 54 min by month's end. Set against the rest of the year, September is Phan Thong's 9th-clearest and 11th-windiest month. For the whole year in context, see Phan Thong's year-round climate.

Daytime high
32°
10th warmest
Overnight low
26°
7th coldest
Rainfall
257 mm
25.9 wet days
Daylight
12 h 06 min
6:08 AM – 6:12 PM
Cloud cover
87%
9th clearest
Wind
7 km/h
11th windiest
Solar energy
4.52 kWh/m²
Travel score
2.3
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 32°C through the month.

A typical September day in Phan Thong reaches about 32°C in the afternoon and slips back to 26°C overnight — a 6°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, September runs on par with August and on par with October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13226
23226
33226
43226
53226
63226
73226
83226
93226
103226
113226
123226
133226
143226
153226
163226
173226
183226
193226
203226
213226
223226
233226
243226
253226
263226
273226
283226
293226
303226

How September really feels in Phan Thong

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
30 feel dangerously hot (≥ 39°C)
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.

Phan Thong weather by month

How September compares with the rest of the year at a glance. September is the 10th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 23°194.111.34.7
Feb33° / 24°194.311.64.0
Mar34° / 26°5610.111.93.1
Apr35° / 27°8914.112.32.4
May34° / 27°15521.312.62.1
Jun33° / 27°13721.912.82.3
Jul33° / 27°15223.512.72.4
Aug32° / 27°16424.612.42.4
Sep32° / 26°25725.912.12.3
Oct32° / 25°18720.511.73.0
Nov32° / 24°376.211.44.2
Dec32° / 23°102.111.24.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 2% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 7% of September, with mostly cloudy or overcast conditions the remaining 91%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1793
2793
3793
4793
5793
6793
7793
8793
9793
10793
11793
12793
13793
14793
15793
16892
17892
18892
19991
20991
21991
221090
231090
241090
251189
261189
271288
281288
291288
301288

Chance of precipitation in September

Any precipitation

Phan Thong gets around 257 mm of rain over 25.9 wet days in September, the wettest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 87% and peaks near 88% on the wettest days.

0%20%40%60%80%100%151015202530
Rain chance (%)
184
284
384
485
585
686
786
886
986
1087
1187
1287
1387
1487
1587
1687
1787
1887
1987
2087
2187
2287
2387
2487
2588
2688
2788
2888
2988
3088

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 91% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Oppressive (%)Miserable (%)
1892
2892
3892
4991
5991
6991
71090
81090
91090
101189
111189
121189
131189
141189
151189
161090
171090
18991
19991
20892
21892
22793
23793
24793
25694
26694
27694
28694
29694
30694

Wind in September

Winds average 7 km/h in September.

Across September, daily wind ranges from about 6 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
19calm
29calm
39calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
266calm
276calm
286calm
296calm
306calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 18 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 24 minutes over September. Sunrise moves from 6:07 AM to 6:08 AM, and sunset from 6:23 PM to 6:02 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.36:076:23
212.36:076:23
312.26:076:22
412.26:086:21
512.26:086:20
612.26:086:20
712.26:086:19
812.26:086:18
912.26:086:17
1012.26:086:17
1112.16:086:16
1212.16:086:15
1312.16:086:14
1412.16:086:14
1512.16:086:13
1612.16:086:12
1712.16:086:11
1812.06:086:11
1912.06:086:10
2012.06:086:09
2112.06:086:08
2212.06:086:08
2312.06:086:07
2412.06:086:06
2512.06:086:05
2611.96:086:05
2711.96:086:04
2811.96:086:03
2911.96:086:02
3011.96:086:02

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.52 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 4.52 kWh/m² to a high of 6 kWh/m² in April across the year — September's 4.52 kWh/m² sits near the bottom.

024151015202530
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.7Bright
44.7Bright
54.6Bright
64.6Bright
74.6Bright
84.6Bright
94.6Bright
104.6Bright
114.5Bright
124.5Bright
134.5Bright
144.5Bright
154.5Bright
164.5Bright
174.4Bright
184.4Bright
194.4Bright
204.4Bright
214.4Bright
224.4Bright
234.4Bright
244.4Bright
254.4Bright
264.4Bright
274.4Bright
284.4Bright
294.4Bright
304.4Bright
Planning a trip in September

Hazard calendar for Phan Thong

In seasonPeak

In September, Phan Thong sits inside its pacific typhoon and rainy season season. The full year is below, with each hazard's peak months called out.

Phan Thong sits in the Pacific typhoon belt; the season peaks July–October.

Phan Thong's rainy season runs May–October, when most of the year's rain falls.

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

Is September a good time to visit Phan Thong?

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

2.3
Sightseeing
10th-best month of the year
3.8
Beach & pool
12th-best month of the year

September is a weaker month for outdoor sightseeing in Phan Thong.

What to pack for Phan Thong in September

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

In September, Phan Thong sees daytime highs around 32°C and nights near 26°C. Pack light clothes and rain gear. Worth having: sun protection. About 26 days see rain.

light clothesrain gearsun protection

Sea temperature near Phan Thong 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 26 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 Phan Thong in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September 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 Phan Thong peaks around August 15 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 13 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 highExtremeExtremeVery highAug 15UV 13Dec 13UV 9
UV index (midday)Level
Jan9Very high
Feb10Very high
Mar12Extreme
Apr12Extreme
May9Very high
Jun12Extreme
Jul12Extreme
Aug13Extreme
Sep12Extreme
Oct10Very high
Nov9Very high
Dec9Very high

Air quality in Phan Thong 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 Phan Thong is worst in January — around 67 µg/m³ PM2.5 (unhealthy), about 2.0× the cleanest month (June, 34 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorPoorPoorJan 2366 µg/m³Jun 2034 µg/m³
PM2.5 (µg/m³)Level
Jan67Unhealthy
Feb65Unhealthy
Mar53Poor
Apr47Poor
May40Poor
Jun34Moderate
Jul36Poor
Aug36Poor
Sep47Poor
Oct57Unhealthy
Nov53Poor
Dec47Poor
Location & terrain

Where is Phan Thong?

Phan Thong sits at 13.5°N, 101.1°E, 9 m above sea level, in Thailand. The nearest listed city is Phanat Nikhom, 10 km away.

Topography around Phan Thong

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

Within 3 km, the terrain around Phan Thong has only modest variations in elevation — a maximum elevation change of 17 m around an average of 3 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 173 m; within 80 km, large variations in elevation — a maximum elevation change of 874 m.

The land around Phan Thong is covered by artificial surfaces (31%) and cropland (21%) within 3 km, cropland (27%), trees (20%) and artificial surfaces (20%) within 16 km, and trees (38%), cropland (22%) and water (22%) within 80 km.

3 km
17 m
16 km
173 m
80 km
874 m
treesgrasslandcroplandartificial surfacesbare terrainwaterwetlandmangroves
September weather nearby: Phanat Nikhom 10 km · Bang Pakong 14 km · Chon Buri 17 km · Ban Bueng 18 km · Ban Ang Sila 23 km · Chachoengsao 24 km · Bang Bo District 32 km · Ban Khlong Bang Sao Thong 34 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 Phan Thong (13.47°, 101.0931°, elevation 9 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).