Ambalangoda weather in September

In September, Ambalangoda sees average daytime highs of 27°C and overnight lows near 26°C, with 278 mm of rain across 26.6 wet days and about 12 hours of daylight. It is the 11th-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 27°C through the month. The sky is clear or mostly clear about 8% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 h 06 min at the start of September to 12 hours by month's end. Set against the rest of the year, September is Ambalangoda's 9th-clearest and 4th-windiest month. For the whole year in context, see Ambalangoda's year-round climate.

Daytime high
27°
11th warmest
Overnight low
26°
6th coldest
Rainfall
278 mm
26.6 wet days
Daylight
12 hours
6:03 AM – 6:05 PM
Cloud cover
77%
9th clearest
Wind
18 km/h
4th windiest
Solar energy
5.22 kWh/m²
Travel score
3.8
out of 10

Ambalangoda is tourist town in the Southern Province of Sri Lanka.

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 27°C through the month.

A typical September day in Ambalangoda reaches about 27°C in the afternoon and slips back to 26°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 28°C. Set against its neighbours, September runs on par with August and on par with October.

20°23°25°28°30°151015202530
Avg high (°C)Avg low (°C)
12726
22726
32726
42726
52726
62726
72726
82726
92726
102726
112726
122726
132726
142726
152726
162726
172726
182726
192726
202726
212726
222726
232726
242826
252826
262826
272826
282826
292826
302826

How September really feels in Ambalangoda

Once humidity and wind are folded in, September averages 0 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
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Ambalangoda weather by month

How September compares with the rest of the year at a glance. September is the 11th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 25°5710.811.76.2
Feb28° / 25°479.811.86.2
Mar29° / 26°6515125.2
Apr29° / 26°16523.612.13.8
May28° / 26°33129.112.33.2
Jun28° / 26°30828.112.43.4
Jul28° / 26°27427.512.33.7
Aug27° / 26°24727.412.23.8
Sep27° / 26°27826.6123.8
Oct28° / 25°30926.911.93.8
Nov28° / 25°28023.711.74.2
Dec28° / 25°14918.311.65.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 8% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 15% of September, with mostly cloudy or overcast conditions the remaining 78%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12080
22080
32080
42179
52278
62278
72278
82278
92377
102377
112377
122476
132476
142476
152476
162476
172476
182278
192278
202278
212278
222179
232179
242179
252179
262179
272179
282179
292179
302278

Chance of precipitation in September

Any precipitation

Ambalangoda gets around 278 mm of rain over 26.6 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 88% and peaks near 90% on the wettest days.

0%20%40%60%80%100%151015202530
Rain chance (%)
188
288
389
489
589
689
790
890
990
1090
1190
1289
1389
1489
1589
1689
1789
1889
1989
2088
2188
2287
2387
2487
2586
2686
2785
2885
2985
3085

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 59% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Oppressive (%)Miserable (%)
15842
25941
35941
45941
55941
66040
76040
86040
95941
105941
115941
125842
135842
145743
155743
165743
175743
185743
195743
205743
215743
225842
235842
245941
255941
266040
276040
286139
296139
306139

Wind in September

Winds average 18 km/h in September.

Across September, daily wind ranges from about 17 km/h on the calmest days to 20 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202530
Wind speed (km/h)Feels
120light breeze
219light breeze
319light breeze
419light breeze
519light breeze
619light breeze
719light breeze
819light breeze
919light breeze
1019light breeze
1119light breeze
1219light breeze
1319light breeze
1419light breeze
1519light breeze
1619light breeze
1719light breeze
1819light breeze
1918light breeze
2018light breeze
2118light breeze
2218light breeze
2318light breeze
2418light breeze
2518light breeze
2618light breeze
2718light breeze
2817light breeze
2917light breeze
3017light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 06 min at the start of September to 12 hours by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over September. Sunrise moves from 6:06 AM to 6:01 AM, and sunset from 6:13 PM to 5:58 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.16:066:13
212.16:066:13
312.16:066:12
412.16:056:12
512.16:056:11
612.16:056:11
712.16:056:10
812.16:056:09
912.16:046:09
1012.16:046:08
1112.16:046:08
1212.16:046:07
1312.16:046:07
1412.06:036:06
1512.06:036:06
1612.06:036:05
1712.06:036:05
1812.06:036:04
1912.06:036:03
2012.06:026:03
2112.06:026:02
2212.06:026:02
2312.06:026:01
2412.06:026:01
2512.06:016:00
2612.06:016:00
2712.06:015:59
2812.06:015:59
2912.06:015:58
3012.06:015:58

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.22 kWh/m².

For context, solar energy here swings from a low near 4.68 kWh/m² to a high of 6.3 kWh/m² in March across the year — September's 5.22 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.3Bright
25.3Bright
35.3Bright
45.3Bright
55.3Bright
65.3Bright
75.3Bright
85.3Bright
95.3Bright
105.3Bright
115.3Bright
125.3Bright
135.3Bright
145.3Bright
155.3Bright
165.3Bright
175.2Bright
185.2Bright
195.2Bright
205.2Bright
215.2Bright
225.2Bright
235.2Bright
245.2Bright
255.2Bright
265.2Bright
275.1Bright
285.1Bright
295.1Bright
305.1Bright
Planning a trip in September

Hazard calendar for Ambalangoda

In seasonPeak

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

Ambalangoda sits in the North Indian Ocean cyclone zone; the season peaks May and October–November.

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

Is September a good time to visit Ambalangoda?

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

3.8
Sightseeing
6th-best month of the year
4.0
Beach & pool
8th-best month of the year

September is a weaker month for outdoor sightseeing in Ambalangoda.

What to pack for Ambalangoda in September

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

In September, Ambalangoda sees daytime highs around 27°C and nights near 26°C. Pack light clothes and rain gear. Worth having: sun protection. About 27 days see rain.

light clothesrain gearsun protection

Sea temperature near Ambalangoda in September

The nearest coast averages about 28°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 15 km away) is warmest in April at about 30°C and coldest in July near 28°C.

The water stays above 20°C all year — warm enough for a swim any month.

26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan28Warm
Feb28Tropical
Mar29Tropical
Apr30Tropical
May29Tropical
Jun28Tropical
Jul28Warm
Aug28Warm
Sep28Warm
Oct28Tropical
Nov29Tropical
Dec28Tropical

UV index in Ambalangoda 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 Ambalangoda peaks around April 17 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 10 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highApr 17UV 13Dec 21UV 10
UV index (midday)Level
Jan10Very high
Feb12Extreme
Mar12Extreme
Apr14Extreme
May12Extreme
Jun11Extreme
Jul11Extreme
Aug13Extreme
Sep13Extreme
Oct12Extreme
Nov11Extreme
Dec10Very high

Air quality in Ambalangoda 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 Ambalangoda is worst in January — around 35 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (September, 16 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateJan 1834 µg/m³Sep 1316 µg/m³
PM2.5 (µg/m³)Level
Jan35Moderate
Feb31Moderate
Mar25Moderate
Apr21Moderate
May20Moderate
Jun18Moderate
Jul17Moderate
Aug17Moderate
Sep16Moderate
Oct18Moderate
Nov25Moderate
Dec30Moderate
Location & terrain

Where is Ambalangoda?

Ambalangoda sits at 6.2°N, 80.1°E, 13 m above sea level, in Sri Lanka. The nearest listed city is Bentota, 22 km away.

GalleBeruwalaUnawatunaKalutaraWeligamaMirissaPanadura

Topography around Ambalangoda

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

Within 3 km, the terrain around Ambalangoda has only modest variations in elevation — a maximum elevation change of 30 m around an average of 5 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 180 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,145 m.

The land around Ambalangoda is covered by water (49%) and trees (41%) within 3 km, water (53%) and trees (44%) within 16 km, and trees (55%) and water (43%) within 80 km.

3 km
30 m
16 km
180 m
80 km
2,145 m
treesgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: Bentota 22 km · Galle 27 km · Beruwala 28 km · Unawatuna 32 km · Kalutara 40 km · Weligama 51 km · Mirissa 55 km · Panadura 56 km

Sri Lanka travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type D / G / M
230 V · 50 Hz
Prices
≈ 27% of US
price level, 2025
GDP per capita
$5,002
2025
Happiness
4.0 / 10
World Happiness, 2025
Safe drinking water
47%
of population, 2024
Homicide rate
3.3
per 100k, 2019
Road deaths
19.7
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Low
EF EPI 486
Religion
Buddhist 70%Hindu 13%Muslim 10%Roman Catholic 6%

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 Ambalangoda (6.2355°, 80.0538°, elevation 13 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). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).