Phon Charoen weather in September

In September, Phon Charoen sees average daytime highs of 31°C and overnight lows near 25°C, with 293 mm of rain across 23.7 wet days and about 12.1 hours of daylight. It is the 6th-warmest and 4th-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 13% of the time in September, and the air most often feels miserable.

Daylight stretches from about 12 h 24 min at the start of September to 11 h 54 min by month's end. Set against the rest of the year, September is Phon Charoen's 9th-clearest and 12th-windiest month. For the whole year in context, see Phon Charoen's year-round climate.

Daytime high
31°
6th warmest
Overnight low
25°
8th coldest
Rainfall
293 mm
23.7 wet days
Daylight
12 h 06 min
5:59 AM – 6:05 PM
Cloud cover
78%
9th clearest
Wind
5 km/h
12th windiest
Solar energy
4.37 kWh/m²
Travel score
2.8
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 Phon Charoen reaches about 31°C in the afternoon and slips back to 25°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 29°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)
13125
23125
33125
43125
53125
63125
73125
83125
93125
103125
113125
123125
133125
143125
153125
163125
173125
183225
193225
203225
213225
223225
233225
243225
253225
263225
273225
283225
293225
303225

How September really feels in Phon Charoen

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
10 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.

Phon Charoen weather by month

How September compares with the rest of the year at a glance. September is the 6th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 17°101.6117.0
Feb31° / 19°172.411.45.7
Mar33° / 22°376.111.94.0
Apr34° / 25°7511.412.42.8
May33° / 25°26823.512.82.3
Jun32° / 26°34126.313.12.3
Jul31° / 25°40028.2132.4
Aug31° / 25°41028.512.62.4
Sep31° / 25°29323.712.12.8
Oct32° / 24°8310.311.64.3
Nov31° / 21°172.611.25.7
Dec29° / 18°80.910.97.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 13% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 12% of September, with mostly cloudy or overcast conditions the remaining 75%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
11189
21189
31189
41189
51288
61387
71387
81486
91684
101684
111783
121882
131981
142080
152278
162476
172476
182773
192971
202971
213268
223268
233565
243664
253862
263961
274159
284159
294456
304456

Chance of precipitation in September

Any precipitation

Phon Charoen gets around 293 mm of rain over 23.7 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 92% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%100%151015202530
Rain chance (%)
192
292
392
491
591
690
790
889
989
1088
1187
1286
1385
1484
1582
1681
1780
1878
1976
2075
2173
2271
2369
2468
2566
2664
2762
2861
2959
3057

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 83% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)Miserable (%)
10397
20397
30496
40496
50595
60595
70694
80793
90793
100892
111990
1211089
1311188
1411287
1521385
1621484
1721583
1831681
1931780
2031879
2132077
2242175
2342274
2442472
2552669
2652768
2752966
2863064
2963262
3073459

Wind in September

Winds average 5 km/h in September, the calmest month.

Across September, daily wind ranges from about 5 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 24 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 30 minutes over September. Sunrise moves from 5:56 AM to 6:01 AM, and sunset from 6:18 PM to 5:52 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.45:566:18
212.35:566:17
312.35:576:16
412.35:576:15
512.35:576:14
612.35:576:14
712.35:576:13
812.25:576:12
912.25:586:11
1012.25:586:10
1112.25:586:09
1212.25:586:08
1312.25:586:07
1412.15:586:06
1512.15:586:06
1612.15:596:05
1712.15:596:04
1812.15:596:03
1912.05:596:02
2012.05:596:01
2112.05:596:00
2212.06:005:59
2312.06:005:58
2412.06:005:58
2511.96:005:57
2611.96:005:56
2711.96:005:55
2811.96:015:54
2911.96:015:53
3011.96:015:52

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.37 kWh/m².

For context, solar energy here swings from a low near 4.05 kWh/m² to a high of 6.02 kWh/m² in April across the year — September's 4.37 kWh/m² sits near the bottom.

024151015202530
Solar energy (kWh/m²)Level
14.1Bright
24.1Bright
34.1Bright
44.1Bright
54.1Bright
64.1Bright
74.1Bright
84.1Bright
94.2Bright
104.2Bright
114.2Bright
124.2Bright
134.3Bright
144.3Bright
154.3Bright
164.3Bright
174.4Bright
184.4Bright
194.4Bright
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 Phon Charoen

In seasonPeak

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

Phon Charoen'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 Phon Charoen?

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

2.8
Sightseeing
7th-best month of the year
4.3
Beach & pool
8th-best month of the year

September is a weaker month for outdoor sightseeing in Phon Charoen.

What to pack for Phon Charoen in September

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

In September, Phon Charoen sees daytime highs around 31°C and nights near 25°C. Pack light clothes and rain gear. About 24 days see rain.

light clothesrain gear

UV index in Phon Charoen 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 Phon Charoen peaks around August 11 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 14 at about 7 (very high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highAug 11UV 13Dec 14UV 7
UV index (midday)Level
Jan8Very high
Feb10Very high
Mar12Extreme
Apr10Extreme
May11Extreme
Jun13Extreme
Jul13Extreme
Aug13Extreme
Sep11Extreme
Oct10Extreme
Nov8Very high
Dec7Very high

Air quality in Phon Charoen 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 Phon Charoen is worst in April — around 78 µg/m³ PM2.5 (unhealthy), about 4.9× the cleanest month (November, 16 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecModerateUnhealthyModerateApr 977 µg/m³Nov 1616 µg/m³
PM2.5 (µg/m³)Level
Jan24Moderate
Feb39Poor
Mar75Unhealthy
Apr78Unhealthy
May28Moderate
Jun20Moderate
Jul20Moderate
Aug20Moderate
Sep18Moderate
Oct18Moderate
Nov16Moderate
Dec18Moderate
Location & terrain

Where is Phon Charoen?

Phon Charoen sits at 18.0°N, 103.2°E, 170 m above sea level, in Thailand. The nearest listed city is Ban Dung, 38 km away.

Topography around Phon Charoen

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

Within 3 km, the terrain around Phon Charoen has only modest variations in elevation — a maximum elevation change of 43 m around an average of 171 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 67 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,873 m.

The land around Phon Charoen is covered by trees (46%) and cropland (41%) within 3 km, trees (51%) and cropland (39%) within 16 km, and trees (53%) and cropland (39%) within 80 km.

3 km
43 m
16 km
67 m
80 km
1,873 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Ban Dung 38 km · Nong Khai 48 km · Vientiane 60 km · Tha Bo 65 km · Pakxan 66 km · Sawang Daen Din 69 km · Udon Thani 80 km · Borikhan 83 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 Phon Charoen (18.0333°, 103.1667°, elevation 170 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).