Svay Rieng weather in September

In September, Svay Rieng sees average daytime highs of 32°C and overnight lows near 25°C, with 281 mm of rain across 27.8 wet days and about 12.1 hours of daylight. It is the 9th-warmest and 1st-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 1% of the time in September, and the air most often feels miserable.

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 Svay Rieng's 12th-clearest and 6th-windiest month. For the whole year in context, see Svay Rieng's year-round climate.

Daytime high: 32°; 9th warmest
Overnight low: 25°; 6th coldest
Rainfall: 281 mm; 27.8 wet days
Daylight: 12 h 06 min; 5:49 AM – 5:53 PM
Cloud cover: 90%; 12th clearest
Wind: 8 km/h; 6th windiest
Solar energy: 4.6 kWh/m²
Travel score: 2.2; out of 10

Svay Rieng is capital of the same named Cambodian province.

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

← August Svay Rieng 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 Svay Rieng 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)	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	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	25	25	25

	Avg high (°C)	Avg low (°C)
1	32	25
2	32	25
3	32	25
4	32	25
5	32	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	25
29	32	25
30	32	25

How September really feels in Svay Rieng

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 feel dangerously hot (≥ 39°C)

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.

Svay Rieng weather by month

How September compares with the rest of the year at a glance. September is the 9th-warmest and 1st-wettest month here — the current month is highlighted below.

Month	High / Low (°C)	Rainfall (mm)	Wet days	Daylight (hours)	Travel score
Jan	32° / 23°	21	3.2	11.4	4.4
Feb	33° / 24°	10	1.8	11.6	4.0
Mar	35° / 25°	33	5.6	11.9	2.9
Apr	35° / 26°	86	13.6	12.2	2.1
May	34° / 26°	176	24	12.5	1.9
Jun	33° / 26°	208	26.5	12.6	2.1
Jul	32° / 25°	229	27.5	12.6	2.2
Aug	32° / 25°	245	28.4	12.4	2.2
Sep	32° / 25°	281	27.8	12.1	2.2
Oct	32° / 25°	271	25.9	11.8	2.5
Nov	32° / 24°	110	13.9	11.5	3.6
Dec	32° / 23°	45	7.2	11.4	4.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 1% 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 95%.

	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 (%)	6	6	6	6	5	5	5	6	5	5	5	5	5	5	5	5	5	5	5	6	6	6	6	6	6	6	6	7	7	7
Cloudier (%)	94	94	94	94	95	95	95	94	95	95	95	95	95	95	95	95	95	95	95	94	94	94	94	94	94	94	94	93	93	93

	Clearer (%)	Cloudier (%)
1	6	94
2	6	94
3	6	94
4	6	94
5	5	95
6	5	95
7	5	95
8	6	94
9	5	95
10	5	95
11	5	95
12	5	95
13	5	95
14	5	95
15	5	95
16	5	95
17	5	95
18	5	95
19	5	95
20	6	94
21	6	94
22	6	94
23	6	94
24	6	94
25	6	94
26	6	94
27	6	94
28	7	93
29	7	93
30	7	93

Chance of precipitation in September

Any precipitation

Svay Rieng gets around 281 mm of rain over 27.8 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 93% and peaks near 95% 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 (%)	95	95	95	95	94	94	94	94	94	94	94	93	93	93	93	93	92	92	92	92	91	91	91	91	91	91	91	92	92	92

	Rain chance (%)
1	95
2	95
3	95
4	95
5	94
6	94
7	94
8	94
9	94
10	94
11	94
12	93
13	93
14	93
15	93
16	93
17	92
18	92
19	92
20	92
21	91
22	91
23	91
24	91
25	91
26	91
27	91
28	92
29	92
30	92

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 86% 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 (%)	13	13	13	14	14	15	15	15	16	16	16	16	16	16	15	15	14	14	14	13	13	12	12	12	12	12	12	12	12	12
Miserable (%)	87	87	87	86	86	85	85	85	84	84	84	84	84	84	85	85	86	86	86	87	87	88	88	88	88	88	88	88	88	88

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

Wind in September

Winds average 8 km/h in September.

Across September, daily wind ranges from about 7 km/h on the calmest days to 9 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)	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	9	8	8	8	8	8	8	8	7	7	7	7	7	7
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	9	calm
2	9	calm
3	9	calm
4	9	calm
5	9	calm
6	9	calm
7	9	calm
8	9	calm
9	9	calm
10	9	calm
11	9	calm
12	9	calm
13	9	calm
14	9	calm
15	9	calm
16	9	calm
17	9	calm
18	8	calm
19	8	calm
20	8	calm
21	8	calm
22	8	calm
23	8	calm
24	8	calm
25	7	calm
26	7	calm
27	7	calm
28	7	calm
29	7	calm
30	7	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 5:50 AM to 5:49 AM, and sunset from 6:03 PM to 5:44 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)	5:50	5:50	5:50	5:50	5:50	5:50	5:50	5:50	5:50	5:50	5:50	5:50	5:49	5:49	5:49	5:49	5:49	5:49	5:49	5:49	5:49	5:49	5:49	5:49	5:49	5:49	5:49	5:49	5:49	5:49
Sunset (PM)	6:03	6:02	6:02	6:01	6:00	6:00	5:59	5:58	5:58	5:57	5:56	5:56	5:55	5:54	5:54	5:53	5:52	5:52	5:51	5:50	5:50	5:49	5:48	5:47	5:47	5:46	5:45	5:45	5:44	5:44

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	12.2	5:50	6:03
2	12.2	5:50	6:02
3	12.2	5:50	6:02
4	12.2	5:50	6:01
5	12.2	5:50	6:00
6	12.2	5:50	6:00
7	12.2	5:50	5:59
8	12.1	5:50	5:58
9	12.1	5:50	5:58
10	12.1	5:50	5:57
11	12.1	5:50	5:56
12	12.1	5:50	5:56
13	12.1	5:49	5:55
14	12.1	5:49	5:54
15	12.1	5:49	5:54
16	12.1	5:49	5:53
17	12.1	5:49	5:52
18	12.0	5:49	5:52
19	12.0	5:49	5:51
20	12.0	5:49	5:50
21	12.0	5:49	5:50
22	12.0	5:49	5:49
23	12.0	5:49	5:48
24	12.0	5:49	5:47
25	12.0	5:49	5:47
26	12.0	5:49	5:46
27	11.9	5:49	5:45
28	11.9	5:49	5:45
29	11.9	5:49	5:44
30	11.9	5:49	5:44

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.6 kWh/m².

For context, solar energy here swings from a low near 4.5 kWh/m² to a high of 6.12 kWh/m² in April across the year — September's 4.6 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)	4.9	4.8	4.8	4.8	4.8	4.8	4.7	4.7	4.7	4.7	4.6	4.6	4.6	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.5	4.4	4.4	4.4	4.4
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	4.9	Bright
2	4.8	Bright
3	4.8	Bright
4	4.8	Bright
5	4.8	Bright
6	4.8	Bright
7	4.7	Bright
8	4.7	Bright
9	4.7	Bright
10	4.7	Bright
11	4.6	Bright
12	4.6	Bright
13	4.6	Bright
14	4.5	Bright
15	4.5	Bright
16	4.5	Bright
17	4.5	Bright
18	4.5	Bright
19	4.5	Bright
20	4.5	Bright
21	4.5	Bright
22	4.5	Bright
23	4.5	Bright
24	4.5	Bright
25	4.5	Bright
26	4.5	Bright
27	4.4	Bright
28	4.4	Bright
29	4.4	Bright
30	4.4	Bright

Planning a trip in September

Hazard calendar for Svay Rieng

In seasonPeak

In September, Svay Rieng sits inside its pacific typhoon and rainy season season. The full year is below, with each hazard's peak months called out.

Svay Rieng sits in the Pacific typhoon belt; the season peaks July–October.

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

Pacific typhoon

Rainy season

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is September a good time to visit Svay Rieng?

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

2.2

Sightseeing

7th-best month of the year

3.5

Beach & pool

12th-best month of the year

September is a weaker month for outdoor sightseeing in Svay Rieng.

What to pack for Svay Rieng in September

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

In September, Svay Rieng sees daytime highs around 32°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 28 days see rain.

light clothesrain gearsun protection

UV index in Svay Rieng 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 Svay Rieng peaks around August 18 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near November 19 at about 8 (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)	11	11	12	12	11	12	12	13	13	10	8	9
Level	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Very high	Very high	Very high

	UV index (midday)	Level
Jan	11	Extreme
Feb	11	Extreme
Mar	12	Extreme
Apr	12	Extreme
May	11	Extreme
Jun	12	Extreme
Jul	12	Extreme
Aug	13	Extreme
Sep	13	Extreme
Oct	10	Very high
Nov	8	Very high
Dec	9	Very high

Air quality in Svay Rieng 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 Svay Rieng is worst in January — around 51 µg/m³ PM2.5 (poor), about 2.1× the cleanest month (August, 24 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)	51	48	45	41	34	29	26	24	30	37	40	41
Level	Poor	Poor	Poor	Poor	Moderate	Moderate	Moderate	Moderate	Moderate	Poor	Poor	Poor

	PM2.5 (µg/m³)	Level
Jan	51	Poor
Feb	48	Poor
Mar	45	Poor
Apr	41	Poor
May	34	Moderate
Jun	29	Moderate
Jul	26	Moderate
Aug	24	Moderate
Sep	30	Moderate
Oct	37	Poor
Nov	40	Poor
Dec	41	Poor

Location & terrain

Where is Svay Rieng?

Svay Rieng sits at 11.1°N, 105.8°E, 12 m above sea level, in Cambodia. The nearest listed city is Bavet, 37 km away.

Topography around Svay Rieng

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

Within 3 km, the terrain around Svay Rieng has only modest variations in elevation — a maximum elevation change of 15 m around an average of 5 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 24 m; within 80 km, large variations in elevation — a maximum elevation change of 960 m.

The land around Svay Rieng is covered by cropland (44%) within 3 km, cropland (82%) within 16 km, and cropland (67%) and trees (25%) within 80 km.

3 km

15 m

cropland 44%

16 km

24 m

cropland 82%

80 km

960 m

cropland 67%

treesgrasslandcroplandartificial surfacesbare terrainwaterwetland

← August Svay Rieng year-round climate October →Best places to visit in September

September weather nearby: Bavet 37 km · Tây Ninh 41 km · Hòa Thành 42 km · Phú Khương 42 km · Tràm Chim 53 km · Dương Minh Châu 57 km · Hồng Ngự 59 km · Trảng Bàng 61 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 Svay Rieng (11.0878°, 105.7994°, elevation 12 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). 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	32	25
2	32	25
3	32	25
4	32	25
5	32	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	25
29	32	25
30	32	25

	Clearer (%)	Cloudier (%)
1	6	94
2	6	94
3	6	94
4	6	94
5	5	95
6	5	95
7	5	95
8	6	94
9	5	95
10	5	95
11	5	95
12	5	95
13	5	95
14	5	95
15	5	95
16	5	95
17	5	95
18	5	95
19	5	95
20	6	94
21	6	94
22	6	94
23	6	94
24	6	94
25	6	94
26	6	94
27	6	94
28	7	93
29	7	93
30	7	93

	Rain chance (%)
1	95
2	95
3	95
4	95
5	94
6	94
7	94
8	94
9	94
10	94
11	94
12	93
13	93
14	93
15	93
16	93
17	92
18	92
19	92
20	92
21	91
22	91
23	91
24	91
25	91
26	91
27	91
28	92
29	92
30	92

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

	Avg high (°C)	Avg low (°C)
1	32	25
2	32	25
3	32	25
4	32	25
5	32	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	25
29	32	25
30	32	25

	Clearer (%)	Cloudier (%)
1	6	94
2	6	94
3	6	94
4	6	94
5	5	95
6	5	95
7	5	95
8	6	94
9	5	95
10	5	95
11	5	95
12	5	95
13	5	95
14	5	95
15	5	95
16	5	95
17	5	95
18	5	95
19	5	95
20	6	94
21	6	94
22	6	94
23	6	94
24	6	94
25	6	94
26	6	94
27	6	94
28	7	93
29	7	93
30	7	93

	Rain chance (%)
1	95
2	95
3	95
4	95
5	94
6	94
7	94
8	94
9	94
10	94
11	94
12	93
13	93
14	93
15	93
16	93
17	92
18	92
19	92
20	92
21	91
22	91
23	91
24	91
25	91
26	91
27	91
28	92
29	92
30	92

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

	Avg high (°C)	Avg low (°C)
1	32	25
2	32	25
3	32	25
4	32	25
5	32	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	25
29	32	25
30	32	25

	Clearer (%)	Cloudier (%)
1	6	94
2	6	94
3	6	94
4	6	94
5	5	95
6	5	95
7	5	95
8	6	94
9	5	95
10	5	95
11	5	95
12	5	95
13	5	95
14	5	95
15	5	95
16	5	95
17	5	95
18	5	95
19	5	95
20	6	94
21	6	94
22	6	94
23	6	94
24	6	94
25	6	94
26	6	94
27	6	94
28	7	93
29	7	93
30	7	93

	Rain chance (%)
1	95
2	95
3	95
4	95
5	94
6	94
7	94
8	94
9	94
10	94
11	94
12	93
13	93
14	93
15	93
16	93
17	92
18	92
19	92
20	92
21	91
22	91
23	91
24	91
25	91
26	91
27	91
28	92
29	92
30	92

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