Chai Badan weather in September

In September, Chai Badan sees average daytime highs of 32°C and overnight lows near 25°C, with 230 mm of rain across 24.2 wet days and about 12.1 hours of daylight. It is the 9th-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 5% 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 Chai Badan's 9th-clearest and 12th-windiest month. For the whole year in context, see Chai Badan's year-round climate.

Daytime high
32°
9th warmest
Overnight low
25°
7th coldest
Rainfall
230 mm
24.2 wet days
Daylight
12 h 06 min
6:07 AM – 6:12 PM
Cloud cover
84%
9th clearest
Wind
7 km/h
12th windiest
Solar energy
4.62 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 32°C through the month.

A typical September day in Chai Badan reaches about 32°C in the afternoon and slips back to 25°C overnight — a 7°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)
13225
23225
33225
43225
53225
63225
73225
83225
93225
103225
113225
123225
133225
143225
153225
163225
173225
183225
193225
203225
213225
223225
233225
243225
253225
263225
273225
283225
293225
303225

How September really feels in Chai Badan

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
25 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.

Chai Badan weather by month

How September compares with the rest of the year at a glance. September is the 9th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan32° / 20°71.811.24.9
Feb34° / 22°10211.53.6
Mar36° / 25°385.811.92.4
Apr37° / 26°6411.312.31.7
May35° / 27°12318.612.71.8
Jun34° / 26°12619.912.92.0
Jul33° / 26°15422.112.82.3
Aug32° / 25°18824.612.52.3
Sep32° / 25°23024.212.12.5
Oct32° / 24°13015.211.73.5
Nov32° / 23°25411.34.6
Dec31° / 21°51.111.15.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 5% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 9% of September, with mostly cloudy or overcast conditions the remaining 87%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1694
2694
3694
4694
5793
6793
7793
8793
9892
10892
11892
121090
131090
141090
151288
161288
171486
181585
191684
201684
211882
221882
231981
241981
252080
262080
272278
282377
292476
302476

Chance of precipitation in September

Any precipitation

Chai Badan gets around 230 mm of rain over 24.2 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 81% and peaks near 82% on the wettest days.

0%20%40%60%80%151015202530
Rain chance (%)
181
281
381
481
581
681
781
881
981
1081
1181
1281
1381
1482
1582
1682
1782
1882
1982
2081
2181
2281
2380
2480
2580
2679
2779
2878
2978
3077

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

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)Miserable (%)
103565
203565
303466
403466
503367
603268
703268
803169
903070
1002971
1102872
1212871
1312772
1412772
1512673
1612673
1712673
1812574
1912574
2012574
2112574
2212673
2312673
2412772
2512772
2612871
2712970
2823068
2923068
3023167

Wind in September

Winds average 7 km/h in September, the calmest month.

Across September, daily wind ranges from about 6 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
206calm
216calm
226calm
236calm
246calm
256calm
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 6:06 AM to 6:08 AM, and sunset from 6:24 PM to 6:01 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.36:066:24
212.36:066:23
312.36:066:23
412.36:066:22
512.26:076:21
612.26:076:20
712.26:076:20
812.26:076:19
912.26:076:18
1012.26:076:17
1112.26:076:16
1212.16:076:16
1312.16:076:15
1412.16:076:14
1512.16:076:13
1612.16:076:12
1712.16:076:11
1812.16:076:11
1912.06:076:10
2012.06:086:09
2112.06:086:08
2212.06:086:07
2312.06:086:07
2412.06:086:06
2512.06:086:05
2611.96:086:04
2711.96:086:03
2811.96:086:03
2911.96:086:02
3011.96:086:01

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.62 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 4.62 kWh/m² to a high of 6.23 kWh/m² in April across the year — September's 4.62 kWh/m² sits near the bottom.

024151015202530
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.7Bright
44.7Bright
54.7Bright
64.7Bright
74.7Bright
84.6Bright
94.6Bright
104.6Bright
114.6Bright
124.6Bright
134.6Bright
144.6Bright
154.6Bright
164.6Bright
174.6Bright
184.6Bright
194.6Bright
204.6Bright
214.6Bright
224.6Bright
234.6Bright
244.6Bright
254.6Bright
264.6Bright
274.6Bright
284.6Bright
294.6Bright
304.6Bright
Planning a trip in September

Hazard calendar for Chai Badan

In seasonPeak

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

Chai Badan's monsoon runs May–October, when most of the year's rain falls.

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

Is September a good time to visit Chai Badan?

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

2.5
Sightseeing
6th-best month of the year
4.1
Beach & pool
11th-best month of the year

September is a weaker month for outdoor sightseeing in Chai Badan.

What to pack for Chai Badan in September

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

In September, Chai Badan sees daytime highs around 32°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 24 days see rain.

light clothesrain gearsun protection

UV index in Chai Badan 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 Chai Badan peaks around August 14 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 23 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 14UV 13Nov 23UV 8
UV index (midday)Level
Jan9Very high
Feb11Extreme
Mar12Extreme
Apr11Extreme
May10Extreme
Jun12Extreme
Jul13Extreme
Aug13Extreme
Sep12Extreme
Oct10Extreme
Nov8Very high
Dec8Very high

Air quality in Chai Badan 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 Chai Badan is worst in March — around 47 µg/m³ PM2.5 (poor), about 2.0× the cleanest month (November, 23 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModerateMar 1446 µg/m³Nov 2323 µg/m³
PM2.5 (µg/m³)Level
Jan35Poor
Feb44Poor
Mar47Poor
Apr40Poor
May32Moderate
Jun26Moderate
Jul26Moderate
Aug26Moderate
Sep27Moderate
Oct27Moderate
Nov23Moderate
Dec23Moderate
Location & terrain

Where is Chai Badan?

Chai Badan sits at 15.2°N, 101.1°E, 44 m above sea level, in Thailand. The nearest listed city is Wichian Buri, 51 km away.

Topography around Chai Badan

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

Within 3 km, the terrain around Chai Badan has only modest variations in elevation — a maximum elevation change of 104 m around an average of 51 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 554 m; within 80 km, large variations in elevation — a maximum elevation change of 1,074 m.

The land around Chai Badan is covered by cropland (43%) and trees (31%) within 3 km, cropland (64%) and trees (28%) within 16 km, and cropland (68%) and trees (27%) within 80 km.

3 km
104 m
16 km
554 m
80 km
1,074 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Wichian Buri 51 km · Pak Chong 63 km · Phra Phutthabat 64 km · Lop Buri 68 km · Dan Khun Thot 68 km · Kaeng Khoi 70 km · Amphoe Sikhiu 70 km · Saraburi 78 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 Chai Badan (15.2°, 101.1333°, elevation 44 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. 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).