Ban Ang Sila weather in September

In September, Ban Ang Sila sees average daytime highs of 31°C and overnight lows near 26°C, with 232 mm of rain across 25.1 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 31°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 Ban Ang Sila's 10th-clearest and 11th-windiest month. For the whole year in context, see Ban Ang Sila's year-round climate.

Daytime high
31°
10th warmest
Overnight low
26°
7th coldest
Rainfall
232 mm
25.1 wet days
Daylight
12 h 06 min
6:08 AM – 6:13 PM
Cloud cover
87%
10th clearest
Wind
8 km/h
11th windiest
Solar energy
4.52 kWh/m²
Travel score
2.5
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 31°C through the month.

A typical September day in Ban Ang Sila 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, 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
133126
143126
153126
163126
173126
183126
193126
203126
213126
223126
233126
243126
253126
263126
273126
283126
293126
303126

How September really feels in Ban Ang Sila

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
29 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.

Ban Ang Sila 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°224.711.34.8
Feb32° / 24°235.111.64.3
Mar33° / 26°5810.711.93.5
Apr34° / 27°9014.112.32.8
May33° / 27°14521.312.62.4
Jun33° / 27°12320.912.82.6
Jul32° / 27°13322.512.72.7
Aug32° / 27°13623.312.42.7
Sep31° / 26°23225.112.12.5
Oct31° / 25°19521.711.73.1
Nov32° / 24°447.111.44.3
Dec31° / 23°122.711.25.0

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 6% of September, with mostly cloudy or overcast conditions the remaining 92%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1793
2892
3892
4892
5892
6694
7694
8694
9694
10694
11694
12793
13793
14694
15694
16694
17793
18793
19793
20892
21892
22991
23991
24991
25991
261090
271090
281090
291090
301090

Chance of precipitation in September

Any precipitation

Ban Ang Sila gets around 232 mm of rain over 25.1 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 85% and peaks near 89% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%100%151015202530
Rain chance (%)
179
279
379
479
580
680
781
881
982
1082
1183
1284
1385
1485
1586
1686
1787
1887
1987
2087
2188
2288
2388
2488
2588
2688
2788
2888
2989
3089

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 (%)
11090
21090
31090
41090
51090
61090
71189
81189
91189
101189
111189
121189
131189
141189
151189
161189
171090
181090
19991
20991
21991
22892
23892
24793
25793
26793
27793
28793
29793
30793

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 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

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 6:08 AM to 6:09 AM, and sunset from 6:24 PM to 6:02 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.36:086:24
212.26:086:23
312.26:086:22
412.26:086:22
512.26:086:21
612.26:086:20
712.26:086:20
812.26:086:19
912.26:086:18
1012.16:086:17
1112.16:086:17
1212.16:086:16
1312.16:086:15
1412.16:086:14
1512.16:086:14
1612.16:086:13
1712.16:086:12
1812.06:086:11
1912.06:086:11
2012.06:086:10
2112.06:086:09
2212.06:086:08
2312.06:096:08
2412.06:096:07
2512.06:096:06
2611.96:096:05
2711.96:096:05
2811.96:096:04
2911.96:096:03
3011.96:096:02

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 5.98 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
54.7Bright
64.7Bright
74.6Bright
84.6Bright
94.6Bright
104.6Bright
114.6Bright
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 Ban Ang Sila

In seasonPeak

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

Ban Ang Sila sits in the Pacific typhoon belt; the season peaks July–October.

Ban Ang Sila'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 Ban Ang Sila?

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

2.5
Sightseeing
11th-best month of the year
3.9
Beach & pool
12th-best month of the year

September is a weaker month for outdoor sightseeing in Ban Ang Sila.

What to pack for Ban Ang Sila in September

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

In September, Ban Ang Sila sees daytime highs around 31°C and nights near 26°C. Pack light clothes and rain gear. Worth having: sun protection. About 25 days see rain.

light clothesrain gearsun protection

Sea temperature near Ban Ang Sila 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 offshore 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 Ban Ang Sila 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 Ban Ang Sila peaks around August 16 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 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 14Dec 17UV 9
UV index (midday)Level
Jan9Very high
Feb10Very high
Mar12Extreme
Apr12Extreme
May12Extreme
Jun12Extreme
Jul12Extreme
Aug14Extreme
Sep12Extreme
Oct10Very high
Nov9Very high
Dec9Very high

Air quality in Ban Ang Sila 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 Ban Ang Sila 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 Ban Ang Sila?

Ban Ang Sila sits at 13.3°N, 100.9°E, 8 m above sea level, in Thailand. The nearest listed city is Chon Buri, 6.0 km away.

Topography around Ban Ang Sila

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

Within 3 km, the terrain around Ban Ang Sila has only modest variations in elevation — a maximum elevation change of 21 m around an average of 3 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 891 m; within 80 km, large variations in elevation — a maximum elevation change of 874 m.

The land around Ban Ang Sila is covered by water (60%) and artificial surfaces (25%) within 3 km, water (59%) within 16 km, and water (33%) and trees (32%) within 80 km.

3 km
21 m
16 km
891 m
80 km
874 m
treesgrasslandcroplandartificial surfacesbare terrainwatermangroves
September weather nearby: Chon Buri 6.0 km · Si Racha 19 km · Ban Bueng 20 km · Phan Thong 23 km · Bang Pakong 24 km · Bang Bo District 30 km · Phanat Nikhom 30 km · Ban Talat Bueng 31 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 Ban Ang Sila (13.3396°, 100.9296°, 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).