Chum Phae weather in September

In September, Chum Phae sees average daytime highs of 31°C and overnight lows near 24°C, with 224 mm of rain across 24 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 7% 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 Chum Phae's 9th-clearest and 12th-windiest month. For the whole year in context, see Chum Phae's year-round climate.

Daytime high
31°
8th warmest
Overnight low
24°
8th coldest
Rainfall
224 mm
24 wet days
Daylight
12 h 06 min
6:03 AM – 6:09 PM
Cloud cover
82%
9th clearest
Wind
5 km/h
12th windiest
Solar energy
4.48 kWh/m²
Travel score
2.9
out of 10

Chum Phae is town in Khon Kaen province, Thailand.

Founded
1956

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

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 Chum Phae reaches about 31°C in the afternoon and slips back to 24°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 about 1°C warmer than October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13124
23124
33124
43124
53124
63124
73124
83124
93124
103124
113124
123124
133124
143124
153124
163124
173124
183124
193124
203124
213124
223124
233124
243124
253124
263124
273124
283124
293124
303124

How September really feels in Chum Phae

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.

Chum Phae 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
Jan29° / 17°102.111.17.0
Feb31° / 19°143.111.45.4
Mar33° / 22°417.811.93.7
Apr34° / 24°7913.912.42.6
May33° / 25°15622.312.82.4
Jun33° / 25°12719.2132.6
Jul32° / 25°14921.712.92.7
Aug31° / 25°19123.812.62.7
Sep31° / 24°2242412.12.9
Oct30° / 23°1101411.64.5
Nov29° / 20°223.811.26.4
Dec28° / 17°61117.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 7% 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 (%)
1694
2694
3694
4694
5793
6892
7892
8991
9991
101189
111189
121288
131387
141585
151684
161783
171783
182080
192080
202278
212278
222377
232575
242575
252674
262773
272773
282971
292971
303070

Chance of precipitation in September

Any precipitation

Chum Phae gets around 224 mm of rain over 24 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 80% and peaks near 84% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
183
284
384
484
584
684
784
884
984
1084
1184
1284
1384
1483
1583
1682
1782
1881
1980
2079
2178
2277
2376
2475
2574
2673
2772
2871
2970
3069

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 72% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1007426
2007426
3007426
4007426
5007327
6007327
7007327
8007228
9007228
10017128
11017029
12017029
13017029
14017128
15027028
16027028
17027028
18036928
19037027
20037027
21047026
22047026
23057025
24057124
25057223
26067222
27077221
28077320
29187219
30197218

Wind in September

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

Across September, daily wind ranges from about 4 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
154calm
164calm
174calm
184calm
194calm
204calm
214calm
224calm
234calm
244calm
254calm
264calm
274calm
285calm
295calm
305calm

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 6:05 AM, and sunset from 6:21 PM to 5:57 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.36:026:21
212.36:026:20
312.36:026:20
412.36:026:19
512.36:026:18
612.26:026:17
712.26:026:16
812.26:026:15
912.26:026:15
1012.26:036:14
1112.26:036:13
1212.26:036:12
1312.16:036:11
1412.16:036:10
1512.16:036:10
1612.16:036:09
1712.16:036:08
1812.16:036:07
1912.06:036:06
2012.06:046:05
2112.06:046:04
2212.06:046:04
2312.06:046:03
2412.06:046:02
2511.96:046:01
2611.96:046:00
2711.96:045:59
2811.96:055:59
2911.96:055:58
3011.96:055:57

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.48 kWh/m².

For context, solar energy here swings from a low near 4.31 kWh/m² to a high of 5.96 kWh/m² in April across the year — September's 4.48 kWh/m² sits near the bottom.

024151015202530
Solar energy (kWh/m²)Level
14.3Bright
24.3Bright
34.3Bright
44.3Bright
54.3Bright
64.3Bright
74.4Bright
84.4Bright
94.4Bright
104.4Bright
114.4Bright
124.4Bright
134.4Bright
144.4Bright
154.4Bright
164.4Bright
174.4Bright
184.5Bright
194.5Bright
204.5Bright
214.5Bright
224.5Bright
234.5Bright
244.5Bright
254.6Bright
264.6Bright
274.6Bright
284.6Bright
294.6Bright
304.6Bright
Planning a trip in September

Hazard calendar for Chum Phae

In seasonPeak

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

Chum Phae'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 Chum Phae?

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

2.9
Sightseeing
7th-best month of the year
4.3
Beach & pool
11th-best month of the year

September is a weaker month for outdoor sightseeing in Chum Phae.

What to pack for Chum Phae in September

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

In September, Chum Phae 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 Chum Phae 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 Chum Phae peaks around August 13 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 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 13UV 14Dec 15UV 8
UV index (midday)Level
Jan9Very high
Feb11Extreme
Mar12Extreme
Apr10Extreme
May11Extreme
Jun13Extreme
Jul13Extreme
Aug14Extreme
Sep12Extreme
Oct10Extreme
Nov9Very high
Dec8Very high

Air quality in Chum Phae 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 Chum Phae is worst in March — around 51 µg/m³ PM2.5 (poor), about 2.7× the cleanest month (June, 19 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateMar 1550 µg/m³Jun 2319 µg/m³
PM2.5 (µg/m³)Level
Jan30Moderate
Feb45Poor
Mar51Poor
Apr41Poor
May27Moderate
Jun19Moderate
Jul19Moderate
Aug20Moderate
Sep21Moderate
Oct24Moderate
Nov22Moderate
Dec23Moderate
Location & terrain

Where is Chum Phae?

Chum Phae sits at 16.5°N, 102.1°E, 227 m above sea level, in Thailand. The nearest listed city is Phu Khiao, 19 km away.

Topography around Chum Phae

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

Within 3 km, the terrain around Chum Phae has only modest variations in elevation — a maximum elevation change of 36 m around an average of 222 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 648 m; within 80 km, large variations in elevation — a maximum elevation change of 1,163 m.

The land around Chum Phae is covered by cropland (38%), trees (34%) and artificial surfaces (22%) within 3 km, cropland (67%) and trees (25%) within 16 km, and cropland (50%) and trees (43%) within 80 km.

3 km
36 m
16 km
648 m
80 km
1,163 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Phu Khiao 19 km · Kaset Sombun 33 km · Phu Kradueng 44 km · Kaeng Khro 51 km · Khon Kaen 79 km · Nong Bua Lamphu 82 km · Chaiyaphum 82 km · Na Klang 85 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 Chum Phae (16.5443°, 102.0992°, elevation 227 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).