Banlung weather in September

In September, Banlung sees average daytime highs of 30°C and overnight lows near 24°C, with 380 mm of rain across 28.4 wet days and about 12.1 hours of daylight. It is the 11th-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 3% 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 Banlung's 11th-clearest and 10th-windiest month. For the whole year in context, see Banlung's year-round climate.

Daytime high
30°
11th warmest
Overnight low
24°
6th coldest
Rainfall
380 mm
28.4 wet days
Daylight
12 h 06 min
5:44 AM – 5:49 PM
Cloud cover
87%
11th clearest
Wind
5 km/h
10th windiest
Solar energy
4.14 kWh/m²
Travel score
2.6
out of 10

Banlung is Capital of the Cambodian province Ratanakiri.

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 30°C through the month.

A typical September day in Banlung reaches about 30°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 28°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)
13024
23024
33024
43024
53024
63024
73024
83024
93024
103024
113024
123024
133024
143024
153024
163024
173024
183024
193024
203024
213024
223024
233024
243024
253024
263024
273024
283124
293124
303124

How September really feels in Banlung

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.

Banlung weather by month

How September compares with the rest of the year at a glance. September is the 11th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan34° / 21°40.711.34.0
Feb35° / 23°51.111.53.0
Mar36° / 25°405.911.92.2
Apr35° / 26°10414.112.32.0
May33° / 25°27926.512.62.2
Jun31° / 25°31527.812.82.4
Jul30° / 24°39329.412.72.6
Aug30° / 24°39329.512.52.6
Sep30° / 24°38028.412.12.6
Oct31° / 23°21320.411.73.4
Nov32° / 23°707.911.44.2
Dec32° / 22°182.811.24.4

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 8% of September, with mostly cloudy or overcast conditions the remaining 88%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1892
2892
3892
4892
5892
6892
7793
8793
9793
10793
11793
12892
13991
14991
15991
161090
171189
181189
191288
201387
211486
221486
231684
241684
251684
261783
271882
281882
291882
302179

Chance of precipitation in September

Any precipitation

Banlung gets around 380 mm of rain over 28.4 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 95% and peaks near 97% on the wettest days.

0%20%40%60%80%100%151015202530
Rain chance (%)
196
296
396
496
597
697
797
897
997
1097
1197
1297
1397
1496
1596
1696
1795
1895
1994
2094
2193
2293
2392
2492
2592
2691
2791
2891
2990
3090

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 79% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Oppressive (%)Miserable (%)
11684
21684
31783
41783
51882
61882
71981
81981
91981
102080
112080
122080
132080
142179
152179
162179
172179
182179
192278
202278
212278
222278
232278
242377
252377
262476
272575
282575
292674
302773

Wind in September

Winds average 5 km/h in September.

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
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
244calm
254calm
264calm
274calm
284calm
294calm
304calm

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 5:44 AM to 5:45 AM, and sunset from 6:00 PM to 5:38 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.35:446:00
212.35:445:59
312.25:445:58
412.25:445:58
512.25:445:57
612.25:445:56
712.25:445:55
812.25:445:55
912.25:445:54
1012.25:445:53
1112.15:445:52
1212.15:445:52
1312.15:445:51
1412.15:445:50
1512.15:445:49
1612.15:445:49
1712.15:445:48
1812.05:445:47
1912.05:445:46
2012.05:445:46
2112.05:445:45
2212.05:445:44
2312.05:445:43
2412.05:445:43
2512.05:445:42
2611.95:445:41
2711.95:445:40
2811.95:445:40
2911.95:455:39
3011.95:455:38

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.14 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 4.14 kWh/m² to a high of 6.09 kWh/m² in March across the year — September's 4.14 kWh/m² sits near the bottom.

012345151015202530
Solar energy (kWh/m²)Level
14.2Bright
24.2Bright
34.2Bright
44.2Bright
54.2Bright
64.2Bright
74.2Bright
84.1Bright
94.1Bright
104.1Bright
114.1Bright
124.1Bright
134.0Bright
144.0Bright
154.0Bright
164.0Bright
174.0Bright
184.0Bright
194.1Bright
204.1Bright
214.1Bright
224.1Bright
234.1Bright
244.2Bright
254.2Bright
264.2Bright
274.2Bright
284.3Bright
294.3Bright
304.3Bright
Planning a trip in September

Hazard calendar for Banlung

In seasonPeak

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

Banlung'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 Banlung?

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
3.7
Beach & pool
9th-best month of the year

September is a weaker month for outdoor sightseeing in Banlung.

What to pack for Banlung in September

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

In September, Banlung sees daytime highs around 30°C and nights near 24°C. Pack light clothes and rain gear. About 28 days see rain.

light clothesrain gear

UV index in Banlung 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 Banlung peaks around August 14 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 11 at about 9 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highAug 14UV 13Dec 11UV 9
UV index (midday)Level
Jan10Very high
Feb11Extreme
Mar12Extreme
Apr12Extreme
May12Extreme
Jun12Extreme
Jul13Extreme
Aug14Extreme
Sep12Extreme
Oct11Extreme
Nov9Very high
Dec9Very high

Air quality in Banlung 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 Banlung is worst in March — around 46 µg/m³ PM2.5 (poor), about 4.8× the cleanest month (November, 10 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModeratePoorModerateGoodMar 1844 µg/m³Nov 2310 µg/m³
PM2.5 (µg/m³)Level
Jan19Moderate
Feb27Moderate
Mar46Poor
Apr34Moderate
May17Moderate
Jun13Moderate
Jul14Moderate
Aug12Moderate
Sep12Moderate
Oct13Moderate
Nov10Good
Dec10Good
Location & terrain

Where is Banlung?

Banlung sits at 13.7°N, 107.0°E, 316 m above sea level, in Cambodia. The nearest listed city is Lumphat, 28 km away.

Stung TrengEa T’ling

Topography around Banlung

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

Within 3 km, the terrain around Banlung has only modest variations in elevation — a maximum elevation change of 150 m around an average of 302 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 423 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,433 m.

The land around Banlung is covered by trees (61%) within 3 km, trees (78%) within 16 km, and trees (79%) within 80 km.

3 km
150 m
16 km
423 m
80 km
1,433 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Lumphat 28 km · Pleiku 113 km · Stung Treng 113 km · Kon Tum 130 km · Ea Drăng 145 km · Quảng Phú 156 km · A Yun Pa 161 km · Ea T’ling 161 km

Cambodia travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type A / C / G
230 V · 50 Hz
Prices
≈ 34% of US
price level, 2025
GDP per capita
$2,872
2025
Happiness
4.5 / 10
World Happiness, 2025
Safe drinking water
30%
of population, 2024
Homicide rate
1.8
per 100k, 2011
Road deaths
19.6
per 100k/yr, 2019
Income group
Lower middle
World Bank
English
Very low
EF EPI 390
Religion
Buddhist 97%Muslim 2%other 1%Christian 0%

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 Banlung (13.7394°, 106.9873°, elevation 316 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).