Chok Chai weather in September

In September, Chok Chai sees average daytime highs of 32°C and overnight lows near 25°C, with 215 mm of rain across 23.7 wet days and about 12.1 hours of daylight. It is the 8th-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 3% of the time in September, and the air most often feels oppressive.

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 Chok Chai's 9th-clearest and 12th-windiest month. For the whole year in context, see Chok Chai's year-round climate.

Daytime high
32°
8th warmest
Overnight low
25°
7th coldest
Rainfall
215 mm
23.7 wet days
Daylight
12 h 06 min
6:03 AM – 6:08 PM
Cloud cover
86%
9th clearest
Wind
7 km/h
12th windiest
Solar energy
4.5 kWh/m²
Travel score
2.6
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 Chok Chai 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 about 1°C cooler than August and about 1°C warmer than 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
233125
243125
253125
263125
273125
283125
293124
303124

How September really feels in Chok Chai

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.

Chok Chai weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 19°61.311.25.6
Feb33° / 21°81.811.54.2
Mar35° / 24°366.411.92.6
Apr36° / 26°6111.812.31.9
May35° / 26°11518.612.72.0
Jun34° / 26°10118.512.92.1
Jul33° / 26°11320.612.82.3
Aug33° / 25°14221.512.52.4
Sep32° / 25°21523.712.12.6
Oct31° / 24°13316.511.73.7
Nov31° / 22°294.811.35.0
Dec30° / 19°51.411.15.9

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 7% of September, with mostly cloudy or overcast conditions the remaining 89%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1892
2793
3793
4793
5793
6793
7793
8892
9892
10892
11892
12892
13892
14991
15991
16991
17991
181189
191288
201288
211387
221486
231486
241486
251486
261585
271585
281684
291783
301882

Chance of precipitation in September

Any precipitation

Chok Chai gets around 215 mm of rain over 23.7 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 79% and peaks near 81% on the wettest days.

0%20%40%60%80%151015202530
Rain chance (%)
178
278
378
478
578
678
778
878
978
1079
1179
1279
1379
1480
1580
1680
1781
1881
1981
2081
2181
2280
2380
2480
2580
2679
2779
2879
2978
3078

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the oppressive band about 60% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)Miserable (%)
107228
207129
307129
407030
506931
606832
716633
816534
916435
1016237
1116138
1216039
1315940
1415940
1515841
1615742
1715643
1815643
1915544
2015445
2115445
2215346
2315346
2415346
2515346
2615346
2725246
2825345
2925345
3025444

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
207calm
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 6:02 AM to 6:04 AM, and sunset from 6:20 PM to 5:57 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.36:026:20
212.36:026:19
312.36:036:18
412.26:036:17
512.26:036:17
612.26:036:16
712.26:036:15
812.26:036:14
912.26:036:14
1012.26:036:13
1112.26:036:12
1212.16:036:11
1312.16:036:10
1412.16:036:10
1512.16:036:09
1612.16:036:08
1712.16:036:07
1812.16:036:07
1912.06:036:06
2012.06:036:05
2112.06:036:04
2212.06:046:03
2312.06:046:03
2412.06:046:02
2512.06:046:01
2611.96:046:00
2711.96:045:59
2811.96:045:59
2911.96:045:58
3011.96:045:57

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.5 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 4.5 kWh/m² to a high of 6.03 kWh/m² in April across the year — September's 4.5 kWh/m² sits near the bottom.

024151015202530
Solar energy (kWh/m²)Level
14.6Bright
24.6Bright
34.6Bright
44.6Bright
54.6Bright
64.6Bright
74.6Bright
84.6Bright
94.5Bright
104.5Bright
114.5Bright
124.5Bright
134.5Bright
144.5Bright
154.5Bright
164.4Bright
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 Chok Chai

In seasonPeak

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

Chok Chai'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 Chok Chai?

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

2.6
Sightseeing
6th-best month of the year
4.1
Beach & pool
12th-best month of the year

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

What to pack for Chok Chai in September

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

In September, Chok Chai 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 Chok Chai 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 Chok Chai peaks around August 13 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 22 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 highExtremeExtremeVery highAug 13UV 14Nov 22UV 8
UV index (midday)Level
Jan9Very high
Feb11Extreme
Mar13Extreme
Apr11Extreme
May10Very high
Jun13Extreme
Jul13Extreme
Aug14Extreme
Sep12Extreme
Oct11Extreme
Nov8Very high
Dec8Very high

Air quality in Chok Chai 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 Chok Chai is worst in March — around 47 µg/m³ PM2.5 (poor), about 2.1× the cleanest month (June, 22 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecPoorModerateMar 1346 µg/m³Jun 2222 µg/m³
PM2.5 (µg/m³)Level
Jan34Moderate
Feb43Poor
Mar47Poor
Apr37Poor
May28Moderate
Jun22Moderate
Jul23Moderate
Aug24Moderate
Sep27Moderate
Oct29Moderate
Nov25Moderate
Dec24Moderate
Location & terrain

Where is Chok Chai?

Chok Chai sits at 14.7°N, 102.2°E, 195 m above sea level, in Thailand. The nearest listed city is Khon Buri, 24 km away.

Topography around Chok Chai

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

Within 3 km, the terrain around Chok Chai has only modest variations in elevation — a maximum elevation change of 24 m around an average of 190 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 129 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,289 m.

The land around Chok Chai is covered by cropland (59%) and trees (23%) within 3 km, cropland (74%) within 16 km, and cropland (59%) and trees (36%) within 80 km.

3 km
24 m
16 km
129 m
80 km
1,289 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Khon Buri 24 km · Nakhon Ratchasima 28 km · Non Sung 51 km · Amphoe Sikhiu 53 km · Ban Huai Thalaeng 59 km · Nang Rong 68 km · Dan Khun Thot 68 km · Na Di 80 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 Chok Chai (14.7284°, 102.1652°, elevation 195 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).