Khao Wong weather in September

In September, Khao Wong sees average daytime highs of 31°C and overnight lows near 24°C, with 255 mm of rain across 23.8 wet days and about 12.1 hours of daylight. It is the 7th-warmest and 2nd-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 9% 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 Khao Wong's 9th-clearest and 12th-windiest month. For the whole year in context, see Khao Wong's year-round climate.

Daytime high
31°
7th warmest
Overnight low
24°
7th coldest
Rainfall
255 mm
23.8 wet days
Daylight
12 h 06 min
5:55 AM – 6:01 PM
Cloud cover
82%
9th clearest
Wind
7 km/h
12th windiest
Solar energy
4.43 kWh/m²
Travel score
3.0
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 Khao Wong reaches about 31°C in the afternoon and slips back to 24°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)
13024
23024
33024
43024
53024
63024
73024
83024
93024
103024
113024
123024
133024
143024
153124
163124
173124
183124
193124
203124
213124
223124
233124
243124
253124
263124
273124
283124
293124
303124

How September really feels in Khao Wong

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.

Khao Wong weather by month

How September compares with the rest of the year at a glance. September is the 7th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 17°51.311.17.1
Feb31° / 19°102.411.45.7
Mar33° / 22°325.511.94.0
Apr34° / 25°6410.712.42.8
May33° / 25°17521.212.82.5
Jun32° / 25°18122.6132.6
Jul31° / 25°2422512.92.8
Aug30° / 25°28327.212.62.7
Sep31° / 24°25523.812.13.0
Oct30° / 23°10011.411.64.6
Nov30° / 20°203.411.26.0
Dec29° / 18°51.2117.3

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 9% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 10% of September, with mostly cloudy or overcast conditions the remaining 81%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1793
2793
3793
4793
5892
61090
71090
81090
91189
101288
111387
121486
131585
141684
151882
162080
172080
182278
192377
202575
212674
222674
232872
242872
253070
263169
273268
283268
293268
303466

Chance of precipitation in September

Any precipitation

Khao Wong gets around 255 mm of rain over 23.8 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 79% and peaks near 90% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%100%151015202530
Rain chance (%)
190
290
390
490
589
689
789
888
988
1087
1186
1285
1384
1483
1582
1681
1779
1878
1976
2075
2173
2271
2370
2468
2566
2665
2763
2862
2961
3060

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 59% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)Miserable (%)
102278
202377
302476
402575
502674
602674
712772
812871
912970
1013069
1113168
1223365
1323464
1423563
1523662
1633859
1733958
1844056
1944155
2044254
2154352
2254550
2364649
2464747
2574945
2675043
2785141
2885339
2995338
30105436

Wind in September

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

Across September, daily wind ranges from about 7 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
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 5:53 AM to 5:57 AM, and sunset from 6:13 PM to 5:49 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.35:536:13
212.35:546:12
312.35:546:12
412.35:546:11
512.35:546:10
612.35:546:09
712.25:546:08
812.25:546:08
912.25:546:07
1012.25:556:06
1112.25:556:05
1212.25:556:04
1312.15:556:03
1412.15:556:02
1512.15:556:02
1612.15:556:01
1712.15:556:00
1812.15:555:59
1912.05:565:58
2012.05:565:57
2112.05:565:56
2212.05:565:56
2312.05:565:55
2412.05:565:54
2511.95:565:53
2611.95:565:52
2711.95:575:51
2811.95:575:51
2911.95:575:50
3011.95:575:49

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.43 kWh/m².

For context, solar energy here swings from a low near 4.36 kWh/m² to a high of 6.08 kWh/m² in April across the year — September's 4.43 kWh/m² sits near the bottom.

024151015202530
Solar energy (kWh/m²)Level
14.2Bright
24.2Bright
34.2Bright
44.2Bright
54.2Bright
64.2Bright
74.3Bright
84.3Bright
94.3Bright
104.3Bright
114.3Bright
124.3Bright
134.3Bright
144.3Bright
154.4Bright
164.4Bright
174.4Bright
184.4Bright
194.5Bright
204.5Bright
214.5Bright
224.5Bright
234.6Bright
244.6Bright
254.6Bright
264.7Bright
274.7Bright
284.7Bright
294.7Bright
304.7Bright
Planning a trip in September

Hazard calendar for Khao Wong

In seasonPeak

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

Khao Wong's monsoon runs May–September, 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 Khao Wong?

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

3.0
Sightseeing
7th-best month of the year
4.4
Beach & pool
9th-best month of the year

September is a weaker month for outdoor sightseeing in Khao Wong.

What to pack for Khao Wong in September

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

In September, Khao Wong sees daytime highs around 31°C and nights near 24°C. Pack light clothes and rain gear. About 24 days see rain.

light clothesrain gear

UV index in Khao Wong in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Khao Wong peaks around July 24 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 13 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 highJul 24UV 13Dec 13UV 8
UV index (midday)Level
Jan9Very high
Feb10Extreme
Mar12Extreme
Apr10Extreme
May12Extreme
Jun12Extreme
Jul13Extreme
Aug13Extreme
Sep11Extreme
Oct10Extreme
Nov8Very high
Dec8Very high

Air quality in Khao Wong 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 Khao Wong is worst in March — around 50 µg/m³ PM2.5 (poor), about 3.3× the cleanest month (November, 16 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateMar 1849 µg/m³Nov 2316 µg/m³
PM2.5 (µg/m³)Level
Jan19Moderate
Feb32Moderate
Mar50Poor
Apr39Poor
May27Moderate
Jun22Moderate
Jul22Moderate
Aug23Moderate
Sep22Moderate
Oct20Moderate
Nov16Moderate
Dec16Moderate
Location & terrain

Where is Khao Wong?

Khao Wong sits at 16.7°N, 104.1°E, 194 m above sea level, in Thailand. The nearest listed city is Kuchinarai, 18 km away.

Topography around Khao Wong

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

Within 3 km, the terrain around Khao Wong has only modest variations in elevation — a maximum elevation change of 28 m around an average of 185 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 438 m; within 80 km, significant variations in elevation — a maximum elevation change of 535 m.

The land around Khao Wong is covered by cropland (63%) and trees (22%) within 3 km, trees (50%) and cropland (45%) within 16 km, and cropland (54%) and trees (40%) within 80 km.

3 km
28 m
16 km
438 m
80 km
535 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Kuchinarai 18 km · Sakon Nakhon 52 km · Kamalasai 68 km · Kalasin 69 km · Mukdahan 70 km · Savannakhet 73 km · Ban Selaphum 77 km · Warichaphum 82 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 Khao Wong (16.7001°, 104.0902°, elevation 194 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).