Ban Selaphum weather in September

In September, Ban Selaphum sees average daytime highs of 31°C and overnight lows near 25°C, with 259 mm of rain across 24.8 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 31°C through the month. The sky is clear or mostly clear about 6% 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 Selaphum's 9th-clearest and 12th-windiest month. For the whole year in context, see Ban Selaphum's year-round climate.

Daytime high
31°
8th warmest
Overnight low
25°
7th coldest
Rainfall
259 mm
24.8 wet days
Daylight
12 h 06 min
5:56 AM – 6:01 PM
Cloud cover
83%
9th clearest
Wind
7 km/h
12th windiest
Solar energy
4.45 kWh/m²
Travel score
2.7
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 Selaphum reaches about 31°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 29°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)
13125
23125
33125
43125
53125
63125
73125
83125
93125
103125
113125
123125
133125
143125
153125
163125
173125
183125
193125
203125
213125
223125
233125
243125
253125
263125
273125
283125
293125
303125

How September really feels in Ban Selaphum

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
8 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 Selaphum 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° / 18°61.611.25.9
Feb33° / 20°112.211.54.6
Mar35° / 24°366.411.93.0
Apr36° / 26°6911.912.32.1
May34° / 26°18321.712.72.0
Jun33° / 26°18422.312.92.2
Jul32° / 26°22424.312.92.4
Aug32° / 25°2582612.52.5
Sep31° / 25°25924.812.12.7
Oct31° / 24°1081211.64.1
Nov31° / 22°233.611.35.1
Dec30° / 19°51.311.16.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 6% 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 83%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1892
2793
3793
4793
5793
6892
7892
8991
9991
101189
111387
121387
131486
141585
151684
161783
171783
181981
192080
202080
212179
222377
232377
242476
252575
262575
272674
282872
292872
302971

Chance of precipitation in September

Any precipitation

Ban Selaphum gets around 259 mm of rain over 24.8 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 82% 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 (%)
189
289
389
490
590
690
789
889
989
1089
1188
1288
1387
1487
1586
1685
1784
1882
1981
2080
2178
2277
2376
2474
2573
2671
2770
2869
2967
3066

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 78% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)Miserable (%)
101090
201090
301090
401090
501090
601090
701189
801189
911287
1011287
1111386
1211485
1311584
1411683
1511881
1611980
1722078
1822276
1922375
2022474
2122672
2222870
2322969
2423167
2533364
2633562
2733760
2843858
2944056
3054154

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

0246810151015202530
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
308calm

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 5:54 AM to 5:57 AM, and sunset from 6:13 PM to 5:50 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.35:546:13
212.35:556:13
312.35:556:12
412.35:556:11
512.35:556:10
612.25:556:09
712.25:556:09
812.25:556:08
912.25:556:07
1012.25:556:06
1112.25:556:05
1212.25:566:05
1312.15:566:04
1412.15:566:03
1512.15:566:02
1612.15:566:01
1712.15:566:00
1812.15:566:00
1912.05:565:59
2012.05:565:58
2112.05:565:57
2212.05:565:56
2312.05:575:55
2412.05:575:55
2511.95:575:54
2611.95:575:53
2711.95:575:52
2811.95:575:51
2911.95:575:50
3011.95:575:50

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.45 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 4.45 kWh/m² to a high of 6.14 kWh/m² in April across the year — September's 4.45 kWh/m² sits near the bottom.

024151015202530
Solar energy (kWh/m²)Level
14.4Bright
24.3Bright
34.3Bright
44.3Bright
54.3Bright
64.3Bright
74.3Bright
84.3Bright
94.3Bright
104.3Bright
114.4Bright
124.4Bright
134.4Bright
144.4Bright
154.4Bright
164.4Bright
174.4Bright
184.4Bright
194.4Bright
204.5Bright
214.5Bright
224.5Bright
234.5Bright
244.5Bright
254.5Bright
264.6Bright
274.6Bright
284.6Bright
294.6Bright
304.6Bright
Planning a trip in September

Hazard calendar for Ban Selaphum

In seasonPeak

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

Ban Selaphum'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 Ban Selaphum?

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

2.7
Sightseeing
7th-best month of the year
4.1
Beach & pool
9th-best month of the year

September is a weaker month for outdoor sightseeing in Ban Selaphum.

What to pack for Ban Selaphum in September

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

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

light clothesrain gear

UV index in Ban Selaphum 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 Ban Selaphum peaks around August 10 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 12 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 10UV 13Dec 12UV 8
UV index (midday)Level
Jan9Very high
Feb10Extreme
Mar12Extreme
Apr10Very high
May11Extreme
Jun12Extreme
Jul13Extreme
Aug13Extreme
Sep11Extreme
Oct11Extreme
Nov8Very high
Dec8Very high

Air quality in Ban Selaphum 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 Selaphum is worst in March — around 53 µg/m³ PM2.5 (poor), about 3.3× the cleanest month (December, 16 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateMar 1851 µg/m³Dec 1316 µg/m³
PM2.5 (µg/m³)Level
Jan22Moderate
Feb36Poor
Mar53Poor
Apr41Poor
May29Moderate
Jun23Moderate
Jul24Moderate
Aug25Moderate
Sep27Moderate
Oct24Moderate
Nov18Moderate
Dec16Moderate
Location & terrain

Where is Ban Selaphum?

Ban Selaphum sits at 16.0°N, 104.0°E, 133 m above sea level, in Thailand. The nearest listed city is Roi Et, 32 km away.

Topography around Ban Selaphum

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

Within 3 km, the terrain around Ban Selaphum has only modest variations in elevation — a maximum elevation change of 47 m around an average of 136 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 53 m; within 80 km, significant variations in elevation — a maximum elevation change of 471 m.

The land around Ban Selaphum is covered by cropland (62%) and trees (20%) within 3 km, cropland (74%) within 16 km, and cropland (73%) and trees (22%) within 80 km.

3 km
47 m
16 km
53 m
80 km
471 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Roi Et 32 km · Yasothon 32 km · Kamalasai 54 km · Kaset Wisai 56 km · Kuchinarai 59 km · Kalasin 66 km · Maha Sarakham 72 km · Amnat Charoen 75 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 Selaphum (16.0167°, 103.95°, elevation 133 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).