Batticaloa weather in September

In September, Batticaloa sees average daytime highs of 30°C and overnight lows near 27°C, with 48 mm of rain across 11.1 wet days and about 12 hours of daylight. It is the 5th-warmest and 9th-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 15% 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 11 h 54 min by month's end. Set against the rest of the year, September is Batticaloa's 7th-clearest and 10th-windiest month. For the whole year in context, see Batticaloa's year-round climate.

Daytime high
30°
5th warmest
Overnight low
27°
8th coldest
Rainfall
48 mm
11.1 wet days
Daylight
12 hours
5:56 AM – 5:59 PM
Cloud cover
70%
7th clearest
Wind
10 km/h
10th windiest
Solar energy
6.12 kWh/m²
Travel score
4.5
out of 10

Batticaloa is city in Eastern Province, 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 30°C through the month.

A typical September day in Batticaloa reaches about 30°C in the afternoon and slips back to 27°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 31°C. Set against its neighbours, September runs on par with August and about 1°C warmer than October.

25°28°30°33°35°151015202530
Avg high (°C)Avg low (°C)
13127
23127
33127
43127
53127
63127
73127
83127
93127
103027
113027
123027
133027
143027
153027
163027
173027
183027
193027
203027
213027
223027
233027
243027
253027
263027
273027
283027
293027
303027

How September really feels in Batticaloa

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.

Batticaloa weather by month

How September compares with the rest of the year at a glance. September is the 5th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 25°17115.511.65.6
Feb27° / 25°8811.211.76.2
Mar29° / 26°528.311.96.1
Apr30° / 27°5910.512.25.0
May31° / 28°519.412.34.4
Jun32° / 28°255.412.44.2
Jul32° / 28°245.812.44.3
Aug31° / 27°317.512.34.5
Sep30° / 27°4811.1124.5
Oct29° / 26°15218.811.84.2
Nov28° / 25°28323.511.64.1
Dec27° / 25°30221.611.64.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 15% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 19% of September, with mostly cloudy or overcast conditions the remaining 66%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12872
22971
33070
43169
53169
63169
73268
83466
93466
103565
113565
123664
133763
143763
153763
163763
173664
183664
193664
203664
213565
223565
233466
243466
253367
263466
273466
283466
293565
303565

Chance of precipitation in September

Any precipitation

Batticaloa gets around 48 mm of rain over 11.1 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 37% and peaks near 46% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
128
229
329
430
530
631
731
832
932
1032
1133
1233
1334
1434
1535
1635
1736
1837
1938
2039
2140
2241
2342
2443
2544
2645
2745
2845
2946
3046

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 67% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)Miserable (%)
117029
216930
316831
416831
516732
616633
716534
816534
916534
1016534
1116534
1216534
1316534
1416633
1516633
1606733
1706733
1806733
1906733
2006733
2106733
2206733
2306733
2406832
2506832
2606832
2706832
2806832
2906931
3006931

Wind in September

Winds average 10 km/h in September.

Across September, daily wind ranges from about 10 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
2910calm
3010calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 06 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 12 minutes over September. Sunrise moves from 5:58 AM to 5:54 AM, and sunset from 6:07 PM to 5:51 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.15:586:07
212.15:586:07
312.15:586:06
412.15:586:06
512.15:586:05
612.15:586:05
712.15:586:04
812.15:586:03
912.15:576:03
1012.15:576:02
1112.15:576:02
1212.15:576:01
1312.15:576:01
1412.15:576:00
1512.05:565:59
1612.05:565:59
1712.05:565:58
1812.05:565:58
1912.05:565:57
2012.05:565:56
2112.05:565:56
2212.05:555:55
2312.05:555:55
2412.05:555:54
2512.05:555:54
2612.05:555:53
2712.05:555:52
2812.05:555:52
2911.95:545:51
3011.95:545:51

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.12 kWh/m².

For context, solar energy here swings from a low near 4.2 kWh/m² to a high of 6.43 kWh/m² in March across the year — September's 6.12 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
16.2Intense
26.2Intense
36.2Intense
46.2Intense
56.2Intense
66.2Intense
76.2Intense
86.2Intense
96.2Intense
106.2Intense
116.2Intense
126.2Intense
136.2Intense
146.2Intense
156.2Intense
166.2Intense
176.2Intense
186.1Intense
196.1Intense
206.1Intense
216.1Intense
226.1Intense
236.1Intense
246.0Intense
256.0Intense
266.0Intense
276.0Bright
286.0Bright
296.0Bright
305.9Bright
Planning a trip in September

Hazard calendar for Batticaloa

In seasonPeak

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

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

Batticaloa's monsoon runs October–January, when most of the year's rain falls.

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

Is September a good time to visit Batticaloa?

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

4.5
Sightseeing
6th-best month of the year
6.4
Beach & pool
8th-best month of the year

September is a reasonable time to visit Batticaloa for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Batticaloa in September

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

In September, Batticaloa sees daytime highs around 30°C and nights near 27°C. Pack light clothes and sun protection. Worth having: rain gear. About 11 days see rain.

light clothessun protectionrain gear

Sea temperature near Batticaloa in September

The nearest coast averages about 29°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 20 km away) is warmest in May at about 30°C and coldest in January near 27°C.

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

26°28°30°32°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb28Warm
Mar29Tropical
Apr30Tropical
May30Tropical
Jun30Tropical
Jul29Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov29Tropical
Dec28Warm

UV index in Batticaloa 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 Batticaloa peaks around April 16 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 10 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeApr 16UV 14Dec 20UV 10
UV index (midday)Level
Jan10Extreme
Feb12Extreme
Mar13Extreme
Apr14Extreme
May13Extreme
Jun11Extreme
Jul11Extreme
Aug13Extreme
Sep13Extreme
Oct12Extreme
Nov11Extreme
Dec10Very high

Air quality in Batticaloa 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 Batticaloa is worst in May — around 25 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMay 2125 µg/m³Dec 2118 µg/m³
PM2.5 (µg/m³)Level
Jan19Moderate
Feb19Moderate
Mar20Moderate
Apr19Moderate
May25Moderate
Jun23Moderate
Jul23Moderate
Aug23Moderate
Sep22Moderate
Oct22Moderate
Nov20Moderate
Dec18Moderate
Location & terrain

Where is Batticaloa?

Batticaloa sits at 7.7°N, 81.7°E, 17 m above sea level, in Sri Lanka. The nearest listed city is Eravur Town, 12 km away.

KalmunaiAmparaVakaraiPolonnaruwaPottuvilSigiriyaBadulla

Topography around Batticaloa

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

Within 3 km, the terrain around Batticaloa has only modest variations in elevation — a maximum elevation change of 19 m around an average of 3 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 44 m; within 80 km, large variations in elevation — a maximum elevation change of 844 m.

The land around Batticaloa is covered by water (33%) and grassland (21%) within 3 km, water (53%) and cropland (22%) within 16 km, and water (40%) and trees (35%) within 80 km.

3 km
19 m
16 km
44 m
80 km
844 m
treesgrasslandcroplandartificial surfacesbare terrainwatermangroves
September weather nearby: Eravur Town 12 km · Kalmunai 37 km · Ampara 46 km · Vakarai 55 km · Polonnaruwa 80 km · Pottuvil 94 km · Sigiriya 107 km · Badulla 107 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 Batticaloa (7.7102°, 81.6924°, elevation 17 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).