Kampong Speu weather in September

In September, Kampong Speu sees average daytime highs of 32°C and overnight lows near 25°C, with 206 mm of rain across 26 wet days and about 12.1 hours of daylight. It is the 9th-warmest and 2nd-wettest month of the year here.

Day-to-day highs hold fairly steady near 32°C through the month. The sky is clear or mostly clear about 2% of the time in September, and the air most often feels oppressive.

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

Daytime high: 32°; 9th warmest
Overnight low: 25°; 6th coldest
Rainfall: 206 mm; 26 wet days
Daylight: 12 h 06 min; 5:54 AM – 5:58 PM
Cloud cover: 89%; 12th clearest
Wind: 7 km/h; 9th windiest
Solar energy: 4.69 kWh/m²
Travel score: 2.3; out of 10

Kampong Speu is city in Cambodia.

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

← August Kampong Speu year-round climate October →Best places to visit in September

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 32°C through the month.

A typical September day in Kampong Speu reaches about 32°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 30°C and 34°C. Set against its neighbours, September runs on par with August and on par with October.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Avg high (°C)	33	33	33	33	33	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32	32
Avg low (°C)	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	25	24	24	24

	Avg high (°C)	Avg low (°C)
1	33	25
2	33	25
3	33	25
4	33	25
5	33	25
6	32	25
7	32	25
8	32	25
9	32	25
10	32	25
11	32	25
12	32	25
13	32	25
14	32	25
15	32	25
16	32	25
17	32	25
18	32	25
19	32	25
20	32	25
21	32	25
22	32	25
23	32	25
24	32	25
25	32	25
26	32	25
27	32	25
28	32	24
29	32	24
30	32	24

How September really feels in Kampong Speu

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

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Kampong Speu weather by month

How September compares with the rest of the year at a glance. September is the 9th-warmest and 2nd-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	33° / 22°	16	2.8	11.4	4.4
Feb	34° / 23°	10	2	11.6	3.6
Mar	36° / 25°	45	7.9	11.9	2.4
Apr	36° / 26°	85	15.3	12.2	1.8
May	35° / 26°	133	22.4	12.5	1.7
Jun	34° / 26°	123	21.7	12.7	2.1
Jul	33° / 25°	125	22.9	12.6	2.3
Aug	33° / 25°	137	23.1	12.4	2.4
Sep	32° / 25°	206	26	12.1	2.3
Oct	31° / 24°	228	24.7	11.7	2.8
Nov	31° / 24°	72	11.7	11.5	4.0
Dec	31° / 23°	27	4.7	11.3	4.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 2% of the time in September, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 4% of September, with mostly cloudy or overcast conditions the remaining 94%.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Clearer (%)	5	5	5	5	4	4	4	4	4	4	4	4	4	4	5	5	6	6	8	8	8	8	8	9	9	8	8	8	8	8
Cloudier (%)	95	95	95	95	96	96	96	96	96	96	96	96	96	96	95	95	94	94	92	92	92	92	92	91	91	92	92	92	92	92

	Clearer (%)	Cloudier (%)
1	5	95
2	5	95
3	5	95
4	5	95
5	4	96
6	4	96
7	4	96
8	4	96
9	4	96
10	4	96
11	4	96
12	4	96
13	4	96
14	4	96
15	5	95
16	5	95
17	6	94
18	6	94
19	8	92
20	8	92
21	8	92
22	8	92
23	8	92
24	9	91
25	9	91
26	8	92
27	8	92
28	8	92
29	8	92
30	8	92

Chance of precipitation in September

Any precipitation

Kampong Speu gets around 206 mm of rain over 26 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 87% and peaks near 91% on the wettest days.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Rain chance (%)	84	84	84	84	85	85	85	85	85	86	86	86	86	87	87	87	87	87	88	88	88	88	88	88	89	89	89	90	90	91

	Rain chance (%)
1	84
2	84
3	84
4	84
5	85
6	85
7	85
8	85
9	85
10	86
11	86
12	86
13	86
14	87
15	87
16	87
17	87
18	87
19	88
20	88
21	88
22	88
23	88
24	88
25	89
26	89
27	89
28	90
29	90
30	91

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 51% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Oppressive (%)	65	65	65	65	65	64	63	62	61	60	58	57	55	54	52	51	49	48	46	45	43	42	40	39	38	37	36	35	34	34
Miserable (%)	35	35	35	35	35	36	37	38	39	40	42	43	45	46	48	49	51	52	54	55	57	58	60	61	62	63	64	65	66	66

	Oppressive (%)	Miserable (%)
1	65	35
2	65	35
3	65	35
4	65	35
5	65	35
6	64	36
7	63	37
8	62	38
9	61	39
10	60	40
11	58	42
12	57	43
13	55	45
14	54	46
15	52	48
16	51	49
17	49	51
18	48	52
19	46	54
20	45	55
21	43	57
22	42	58
23	40	60
24	39	61
25	38	62
26	37	63
27	36	64
28	35	65
29	34	66
30	34	66

Wind in September

Winds average 7 km/h in September.

Across September, daily wind ranges from about 5 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Wind speed (km/h)	8	8	8	8	8	8	8	8	8	8	8	7	7	7	7	7	7	7	7	7	7	6	6	6	6	6	6	6	6	5
Feels	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm	calm

	Wind speed (km/h)	Feels
1	8	calm
2	8	calm
3	8	calm
4	8	calm
5	8	calm
6	8	calm
7	8	calm
8	8	calm
9	8	calm
10	8	calm
11	8	calm
12	7	calm
13	7	calm
14	7	calm
15	7	calm
16	7	calm
17	7	calm
18	7	calm
19	7	calm
20	7	calm
21	7	calm
22	6	calm
23	6	calm
24	6	calm
25	6	calm
26	6	calm
27	6	calm
28	6	calm
29	6	calm
30	5	calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 12 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 18 minutes over September. Sunrise moves from 5:55 AM to 5:54 AM, and sunset from 6:08 PM to 5:49 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Daylight (h)	12.2	12.2	12.2	12.2	12.2	12.2	12.2	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.1	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	12.0	11.9	11.9	11.9	11.9
Sunrise (AM)	5:55	5:55	5:55	5:55	5:55	5:55	5:55	5:55	5:55	5:55	5:55	5:55	5:55	5:54	5:54	5:54	5:54	5:54	5:54	5:54	5:54	5:54	5:54	5:54	5:54	5:54	5:54	5:54	5:54	5:54
Sunset (PM)	6:08	6:08	6:07	6:06	6:06	6:05	6:04	6:04	6:03	6:02	6:02	6:01	6:00	6:00	5:59	5:58	5:57	5:57	5:56	5:55	5:55	5:54	5:53	5:53	5:52	5:51	5:51	5:50	5:49	5:49

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	12.2	5:55	6:08
2	12.2	5:55	6:08
3	12.2	5:55	6:07
4	12.2	5:55	6:06
5	12.2	5:55	6:06
6	12.2	5:55	6:05
7	12.2	5:55	6:04
8	12.1	5:55	6:04
9	12.1	5:55	6:03
10	12.1	5:55	6:02
11	12.1	5:55	6:02
12	12.1	5:55	6:01
13	12.1	5:55	6:00
14	12.1	5:54	6:00
15	12.1	5:54	5:59
16	12.1	5:54	5:58
17	12.1	5:54	5:57
18	12.0	5:54	5:57
19	12.0	5:54	5:56
20	12.0	5:54	5:55
21	12.0	5:54	5:55
22	12.0	5:54	5:54
23	12.0	5:54	5:53
24	12.0	5:54	5:53
25	12.0	5:54	5:52
26	12.0	5:54	5:51
27	11.9	5:54	5:51
28	11.9	5:54	5:50
29	11.9	5:54	5:49
30	11.9	5:54	5:49

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.69 kWh/m².

For context, solar energy here swings from a low near 4.59 kWh/m² to a high of 6.07 kWh/m² in March across the year — September's 4.69 kWh/m² sits near the bottom.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
Solar energy (kWh/m²)	5.0	5.0	5.0	4.9	4.9	4.9	4.8	4.8	4.8	4.8	4.7	4.7	4.7	4.6	4.6	4.6	4.6	4.6	4.6	4.6	4.6	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5
Level	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright	Bright

	Solar energy (kWh/m²)	Level
1	5.0	Bright
2	5.0	Bright
3	5.0	Bright
4	4.9	Bright
5	4.9	Bright
6	4.9	Bright
7	4.8	Bright
8	4.8	Bright
9	4.8	Bright
10	4.8	Bright
11	4.7	Bright
12	4.7	Bright
13	4.7	Bright
14	4.6	Bright
15	4.6	Bright
16	4.6	Bright
17	4.6	Bright
18	4.6	Bright
19	4.6	Bright
20	4.6	Bright
21	4.6	Bright
22	4.5	Bright
23	4.5	Bright
24	4.5	Bright
25	4.5	Bright
26	4.5	Bright
27	4.5	Bright
28	4.5	Bright
29	4.5	Bright
30	4.5	Bright

Planning a trip in September

Hazard calendar for Kampong Speu

In seasonPeak

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

Kampong Speu's rainy season runs May–October, when most of the year's rain falls.

Rainy season

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is September a good time to visit Kampong Speu?

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

2.3

Sightseeing

8th-best month of the year

3.8

Beach & pool

11th-best month of the year

September is a weaker month for outdoor sightseeing in Kampong Speu.

What to pack for Kampong Speu in September

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

In September, Kampong Speu sees daytime highs around 32°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 26 days see rain.

light clothesrain gearsun protection

UV index in Kampong Speu in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Kampong Speu peaks around August 18 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 23 at about 9 (very high).

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	10	11	12	12	11	12	12	14	13	11	9	9
Level	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Very high	Very high

	UV index (midday)	Level
Jan	10	Extreme
Feb	11	Extreme
Mar	12	Extreme
Apr	12	Extreme
May	11	Extreme
Jun	12	Extreme
Jul	12	Extreme
Aug	14	Extreme
Sep	13	Extreme
Oct	11	Extreme
Nov	9	Very high
Dec	9	Very high

Air quality in Kampong Speu 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 Kampong Speu is worst in February — around 43 µg/m³ PM2.5 (poor), about 3.5× the cleanest month (August, 13 µg/m³).

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	34	43	35	26	18	14	14	13	14	17	18	19
Level	Moderate	Poor	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	PM2.5 (µg/m³)	Level
Jan	34	Moderate
Feb	43	Poor
Mar	35	Moderate
Apr	26	Moderate
May	18	Moderate
Jun	14	Moderate
Jul	14	Moderate
Aug	13	Moderate
Sep	14	Moderate
Oct	17	Moderate
Nov	18	Moderate
Dec	19	Moderate

Location & terrain

Where is Kampong Speu?

Kampong Speu sits at 11.5°N, 104.5°E, 35 m above sea level, in Cambodia. The nearest listed city is Phumĭ Véal Tônsay, 28 km away.

Topography around Kampong Speu

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

Within 3 km, the terrain around Kampong Speu has only modest variations in elevation — a maximum elevation change of 20 m around an average of 33 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 580 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,787 m.

The land around Kampong Speu is covered by cropland (41%) and artificial surfaces (22%) within 3 km, cropland (63%) within 16 km, and cropland (53%) and trees (28%) within 80 km.

3 km

20 m

cropland 41%

16 km

580 m

cropland 63%

80 km

1,787 m

cropland 53%

treesgrasslandcroplandartificial surfacesbare terrainwaterwetland

← August Kampong Speu year-round climate October →Best places to visit in September

September weather nearby: Phumĭ Véal Tônsay 28 km · Phumĭ Yoŭl Toŭng 30 km · Kandoeng 39 km · Dangkao 41 km · Boeng Kak Pir 42 km · Chrang Chamreh Muoy 44 km · Phnom Penh 45 km · Ta Khmau 47 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

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 Kampong Speu (11.4533°, 104.5208°, elevation 35 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).

	Avg high (°C)	Avg low (°C)
1	33	25
2	33	25
3	33	25
4	33	25
5	33	25
6	32	25
7	32	25
8	32	25
9	32	25
10	32	25
11	32	25
12	32	25
13	32	25
14	32	25
15	32	25
16	32	25
17	32	25
18	32	25
19	32	25
20	32	25
21	32	25
22	32	25
23	32	25
24	32	25
25	32	25
26	32	25
27	32	25
28	32	24
29	32	24
30	32	24

	Clearer (%)	Cloudier (%)
1	5	95
2	5	95
3	5	95
4	5	95
5	4	96
6	4	96
7	4	96
8	4	96
9	4	96
10	4	96
11	4	96
12	4	96
13	4	96
14	4	96
15	5	95
16	5	95
17	6	94
18	6	94
19	8	92
20	8	92
21	8	92
22	8	92
23	8	92
24	9	91
25	9	91
26	8	92
27	8	92
28	8	92
29	8	92
30	8	92

	Rain chance (%)
1	84
2	84
3	84
4	84
5	85
6	85
7	85
8	85
9	85
10	86
11	86
12	86
13	86
14	87
15	87
16	87
17	87
18	87
19	88
20	88
21	88
22	88
23	88
24	88
25	89
26	89
27	89
28	90
29	90
30	91

	Oppressive (%)	Miserable (%)
1	65	35
2	65	35
3	65	35
4	65	35
5	65	35
6	64	36
7	63	37
8	62	38
9	61	39
10	60	40
11	58	42
12	57	43
13	55	45
14	54	46
15	52	48
16	51	49
17	49	51
18	48	52
19	46	54
20	45	55
21	43	57
22	42	58
23	40	60
24	39	61
25	38	62
26	37	63
27	36	64
28	35	65
29	34	66
30	34	66

	Avg high (°C)	Avg low (°C)
1	33	25
2	33	25
3	33	25
4	33	25
5	33	25
6	32	25
7	32	25
8	32	25
9	32	25
10	32	25
11	32	25
12	32	25
13	32	25
14	32	25
15	32	25
16	32	25
17	32	25
18	32	25
19	32	25
20	32	25
21	32	25
22	32	25
23	32	25
24	32	25
25	32	25
26	32	25
27	32	25
28	32	24
29	32	24
30	32	24

	Clearer (%)	Cloudier (%)
1	5	95
2	5	95
3	5	95
4	5	95
5	4	96
6	4	96
7	4	96
8	4	96
9	4	96
10	4	96
11	4	96
12	4	96
13	4	96
14	4	96
15	5	95
16	5	95
17	6	94
18	6	94
19	8	92
20	8	92
21	8	92
22	8	92
23	8	92
24	9	91
25	9	91
26	8	92
27	8	92
28	8	92
29	8	92
30	8	92

	Rain chance (%)
1	84
2	84
3	84
4	84
5	85
6	85
7	85
8	85
9	85
10	86
11	86
12	86
13	86
14	87
15	87
16	87
17	87
18	87
19	88
20	88
21	88
22	88
23	88
24	88
25	89
26	89
27	89
28	90
29	90
30	91

	Oppressive (%)	Miserable (%)
1	65	35
2	65	35
3	65	35
4	65	35
5	65	35
6	64	36
7	63	37
8	62	38
9	61	39
10	60	40
11	58	42
12	57	43
13	55	45
14	54	46
15	52	48
16	51	49
17	49	51
18	48	52
19	46	54
20	45	55
21	43	57
22	42	58
23	40	60
24	39	61
25	38	62
26	37	63
27	36	64
28	35	65
29	34	66
30	34	66

	Avg high (°C)	Avg low (°C)
1	33	25
2	33	25
3	33	25
4	33	25
5	33	25
6	32	25
7	32	25
8	32	25
9	32	25
10	32	25
11	32	25
12	32	25
13	32	25
14	32	25
15	32	25
16	32	25
17	32	25
18	32	25
19	32	25
20	32	25
21	32	25
22	32	25
23	32	25
24	32	25
25	32	25
26	32	25
27	32	25
28	32	24
29	32	24
30	32	24

	Clearer (%)	Cloudier (%)
1	5	95
2	5	95
3	5	95
4	5	95
5	4	96
6	4	96
7	4	96
8	4	96
9	4	96
10	4	96
11	4	96
12	4	96
13	4	96
14	4	96
15	5	95
16	5	95
17	6	94
18	6	94
19	8	92
20	8	92
21	8	92
22	8	92
23	8	92
24	9	91
25	9	91
26	8	92
27	8	92
28	8	92
29	8	92
30	8	92

	Rain chance (%)
1	84
2	84
3	84
4	84
5	85
6	85
7	85
8	85
9	85
10	86
11	86
12	86
13	86
14	87
15	87
16	87
17	87
18	87
19	88
20	88
21	88
22	88
23	88
24	88
25	89
26	89
27	89
28	90
29	90
30	91

	Oppressive (%)	Miserable (%)
1	65	35
2	65	35
3	65	35
4	65	35
5	65	35
6	64	36
7	63	37
8	62	38
9	61	39
10	60	40
11	58	42
12	57	43
13	55	45
14	54	46
15	52	48
16	51	49
17	49	51
18	48	52
19	46	54
20	45	55
21	43	57
22	42	58
23	40	60
24	39	61
25	38	62
26	37	63
27	36	64
28	35	65
29	34	66
30	34	66