Vakarai weather in September

In September, Vakarai sees average daytime highs of 31°C and overnight lows near 27°C, with 59 mm of rain across 11.5 wet days and about 12 hours of daylight. It is the 5th-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 31°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 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 Vakarai's 8th-clearest and 6th-windiest month. For the whole year in context, see Vakarai's year-round climate.

Daytime high
31°
5th warmest
Overnight low
27°
8th coldest
Rainfall
59 mm
11.5 wet days
Daylight
12 hours
5:57 AM – 6:00 PM
Cloud cover
72%
8th clearest
Wind
17 km/h
6th windiest
Solar energy
6.21 kWh/m²
Travel score
3.9
out of 10

Vakarai is town in 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 31°C through the month.

A typical September day in Vakarai reaches about 31°C in the afternoon and slips back to 27°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 33°C. Set against its neighbours, September runs on par with August and about 2°C warmer than October.

25°28°30°33°35°151015202530
Avg high (°C)Avg low (°C)
13227
23227
33227
43227
53227
63227
73227
83227
93227
103227
113227
123227
133227
143227
153227
163227
173227
183227
193127
203127
213127
223127
233127
243127
253127
263127
273127
283127
293127
303127

How September really feels in Vakarai

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.

Vakarai weather by month

How September compares with the rest of the year at a glance. September is the 5th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 25°13614.711.65.8
Feb27° / 25°791011.76.4
Mar29° / 26°447.911.96.2
Apr30° / 27°6010.512.24.9
May32° / 28°53912.44.0
Jun33° / 28°203.812.53.9
Jul32° / 27°286.312.43.9
Aug32° / 27°388.412.33.9
Sep31° / 27°5911.5123.9
Oct30° / 26°17819.711.83.8
Nov28° / 25°29823.811.64.0
Dec27° / 25°27821.211.54.8

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 17% of September, with mostly cloudy or overcast conditions the remaining 68%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
12773
22872
32872
42872
52971
62971
73070
83070
93268
103268
113268
123367
133466
143466
153565
163565
173565
183466
193466
203466
213367
223367
233367
243367
253367
263367
273466
283466
293466
303565

Chance of precipitation in September

Any precipitation

Vakarai gets around 59 mm of rain over 11.5 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 38% and peaks near 52% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
131
231
332
432
532
632
732
832
932
1032
1132
1233
1333
1433
1534
1635
1736
1837
1938
2040
2141
2243
2345
2446
2548
2649
2750
2851
2951
3052

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 94% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)Miserable (%)
12935
22935
32935
42926
52926
62926
72926
82926
92926
102935
112935
122935
131945
141954
151954
161954
170964
180964
190964
200964
210964
220964
230964
240955
250955
260946
270946
280946
290946
301927

Wind in September

Winds average 17 km/h in September.

Across September, daily wind ranges from about 15 km/h on the calmest days to 18 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202530
Wind speed (km/h)Feels
118light breeze
218light breeze
318light breeze
418light breeze
518light breeze
618light breeze
718light breeze
818light breeze
918light breeze
1018light breeze
1118light breeze
1218light breeze
1318light breeze
1417light breeze
1517light breeze
1617light breeze
1717light breeze
1817light breeze
1917light breeze
2017light breeze
2117light breeze
2216light breeze
2316light breeze
2416light breeze
2516light breeze
2616light breeze
2716light breeze
2815light breeze
2915light breeze
3015light breeze

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 5:59 AM to 5:55 AM, and sunset from 6:09 PM to 5:52 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.25:596:09
212.15:596:08
312.15:596:08
412.15:596:07
512.15:596:06
612.15:596:06
712.15:596:05
812.15:586:05
912.15:586:04
1012.15:586:04
1112.15:586:03
1212.15:586:02
1312.15:586:02
1412.15:586:01
1512.15:576:01
1612.05:576:00
1712.05:575:59
1812.05:575:59
1912.05:575:58
2012.05:575:58
2112.05:575:57
2212.05:565:56
2312.05:565:56
2412.05:565:55
2512.05:565:55
2612.05:565:54
2712.05:565:53
2812.05:565:53
2911.95:565:52
3011.95:555:52

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.21 kWh/m².

For context, solar energy here swings from a low near 4.39 kWh/m² to a high of 6.66 kWh/m² in March across the year — September's 6.21 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
186.2Intense
196.2Intense
206.2Intense
216.2Intense
226.2Intense
236.2Intense
246.2Intense
256.2Intense
266.1Intense
276.1Intense
286.1Intense
296.1Intense
306.1Intense
Planning a trip in September

Hazard calendar for Vakarai

In seasonPeak

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

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

Vakarai'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 Vakarai?

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

3.9
Sightseeing
8th-best month of the year
6.0
Beach & pool
8th-best month of the year

September is a weaker month for outdoor sightseeing in Vakarai. The water and warmth also suit a beach or pool day.

What to pack for Vakarai in September

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

In September, Vakarai sees daytime highs around 31°C and nights near 27°C. Pack light clothes and sun protection. Worth having: rain gear. About 12 days see rain.

light clothessun protectionrain gear

Sea temperature near Vakarai 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 21 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 Vakarai 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 Vakarai peaks around April 20 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 20UV 14Dec 20UV 10
UV index (midday)Level
Jan10Extreme
Feb12Extreme
Mar13Extreme
Apr14Extreme
May14Extreme
Jun11Extreme
Jul11Extreme
Aug13Extreme
Sep12Extreme
Oct12Extreme
Nov11Extreme
Dec10Very high

Air quality in Vakarai 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 Vakarai is worst in May — around 22 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMay 2122 µg/m³Nov 2114 µg/m³
PM2.5 (µg/m³)Level
Jan16Moderate
Feb17Moderate
Mar16Moderate
Apr14Moderate
May22Moderate
Jun20Moderate
Jul19Moderate
Aug20Moderate
Sep19Moderate
Oct16Moderate
Nov14Moderate
Dec14Moderate
Location & terrain

Where is Vakarai?

Vakarai sits at 8.1°N, 81.4°E, 9 m above sea level, in Sri Lanka. The nearest listed city is Eravur Town, 44 km away.

Eravur TownPolonnaruwaTrincomaleeBatticaloaSigiriyaDambullaKalmunaiAmpara

Topography around Vakarai

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

Within 3 km, the terrain around Vakarai has only modest variations in elevation — a maximum elevation change of 11 m around an average of 2 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 125 m; within 80 km, large variations in elevation — a maximum elevation change of 658 m.

The land around Vakarai is covered by water (50%) and grassland (30%) within 3 km, water (49%) and trees (25%) within 16 km, and trees (38%) and water (37%) within 80 km.

3 km
11 m
16 km
125 m
80 km
658 m
treesgrasslandcroplandartificial surfacesbare terrainwatermangroves
September weather nearby: Eravur Town 44 km · Polonnaruwa 52 km · Trincomalee 54 km · Batticaloa 55 km · Sigiriya 78 km · Dambulla 91 km · Kalmunai 92 km · Ampara 97 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 Vakarai (8.1333°, 81.4333°, elevation 9 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).