Valvedditturai weather in September

In September, Valvedditturai sees average daytime highs of 31°C and overnight lows near 27°C, with 42 mm of rain across 8.5 wet days and about 12.1 hours of daylight. It is the 6th-warmest and 5th-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 21% 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 Valvedditturai's 7th-clearest and 5th-windiest month. For the whole year in context, see Valvedditturai's year-round climate.

Daytime high
31°
6th warmest
Overnight low
27°
7th coldest
Rainfall
42 mm
8.5 wet days
Daylight
12 h 06 min
6:02 AM – 6:05 PM
Cloud cover
69%
7th clearest
Wind
22 km/h
5th windiest
Solar energy
5.89 kWh/m²
Travel score
4.6
out of 10

Valvedditturai 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 Valvedditturai reaches about 31°C in the afternoon and slips back to 27°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 32°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
103127
113127
123127
133127
143127
153127
163127
173127
183127
193127
203127
213127
223127
233127
243127
253127
263127
273127
283127
293027
303027

How September really feels in Valvedditturai

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.

Valvedditturai weather by month

How September compares with the rest of the year at a glance. September is the 6th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 25°667.511.56.8
Feb28° / 25°274.711.77.0
Mar30° / 26°213.111.96.2
Apr31° / 27°346.312.24.8
May32° / 28°40512.44.5
Jun31° / 28°173.112.64.7
Jul31° / 28°215.412.54.5
Aug31° / 27°326.812.34.6
Sep31° / 27°428.512.14.6
Oct29° / 26°17218.711.84.1
Nov28° / 26°28122.211.64.2
Dec27° / 25°1911711.45.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 21% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 14% of September, with mostly cloudy or overcast conditions the remaining 66%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13169
23070
33169
43169
53268
63268
73268
83268
93268
103367
113367
123466
133565
143565
153565
163664
173664
183664
193664
203763
213763
223664
233664
243664
253664
263664
273664
283763
293763
303763

Chance of precipitation in September

Any precipitation

Valvedditturai gets around 42 mm of rain over 8.5 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 28% and peaks near 40% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
122
222
323
423
524
624
725
825
925
1026
1126
1226
1326
1426
1526
1626
1726
1826
1927
2027
2128
2229
2330
2432
2533
2634
2736
2837
2938
3040

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 72% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Oppressive (%)Miserable (%)
13070
23169
33169
43169
53169
63169
73169
83070
93070
103070
112971
122971
132872
142872
152773
162773
172674
182674
192674
202575
212575
222674
232674
242674
252773
262773
272872
282872
292872
302872

Wind in September

Winds average 22 km/h in September.

Across September, daily wind ranges from about 19 km/h on the calmest days to 23 km/h at its breeziest. It stays fairly steady from day to day.

0510152025151015202530
Wind speed (km/h)Feels
123breezy
223breezy
323breezy
423breezy
523breezy
623breezy
723breezy
823breezy
923breezy
1023breezy
1123breezy
1223breezy
1323breezy
1423breezy
1523breezy
1623breezy
1722breezy
1822breezy
1922breezy
2022breezy
2122breezy
2221breezy
2321breezy
2421breezy
2521breezy
2620breezy
2720breezy
2820light breeze
2919light breeze
3019light 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 6:03 AM to 6:01 AM, and sunset from 6:15 PM to 5:56 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.26:036:15
212.26:036:14
312.26:036:14
412.26:036:13
512.26:036:12
612.16:036:12
712.16:036:11
812.16:036:10
912.16:036:10
1012.16:036:09
1112.16:036:09
1212.16:026:08
1312.16:026:07
1412.16:026:07
1512.16:026:06
1612.16:026:05
1712.06:026:05
1812.06:026:04
1912.06:026:03
2012.06:026:03
2112.06:026:02
2212.06:026:01
2312.06:016:01
2412.06:016:00
2512.06:015:59
2612.06:015:59
2712.06:015:58
2811.96:015:58
2911.96:015:57
3011.96:015:56

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.89 kWh/m².

For context, solar energy here swings from a low near 4.2 kWh/m² to a high of 6.56 kWh/m² in March across the year — September's 5.89 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.9Bright
25.9Bright
35.9Bright
45.9Bright
55.9Bright
65.9Bright
75.9Bright
85.9Bright
95.9Bright
105.9Bright
115.9Bright
125.9Bright
135.9Bright
146.0Bright
155.9Bright
165.9Bright
175.9Bright
185.9Bright
195.9Bright
205.9Bright
215.9Bright
225.9Bright
235.8Bright
245.8Bright
255.8Bright
265.8Bright
275.7Bright
285.7Bright
295.7Bright
305.6Bright
Planning a trip in September

Hazard calendar for Valvedditturai

In seasonPeak

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

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

Valvedditturai's monsoon runs October–December, 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 Valvedditturai?

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

4.6
Sightseeing
7th-best month of the year
6.7
Beach & pool
9th-best month of the year

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

What to pack for Valvedditturai in September

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

In September, Valvedditturai sees daytime highs around 31°C and nights near 27°C. Pack light clothes. Worth having: rain gear, sun protection and a windbreaker. About 9 days see rain.

light clothesrain gearsun protectiona windbreaker

Sea temperature near Valvedditturai 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 offshore is warmest in April 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
Feb27Warm
Mar29Tropical
Apr30Tropical
May30Tropical
Jun29Tropical
Jul29Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov28Tropical
Dec27Warm

UV index in Valvedditturai 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 Valvedditturai peaks around August 16 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 11 at about 8 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highAug 16UV 13Jan 11UV 8
UV index (midday)Level
Jan8Very high
Feb12Extreme
Mar12Extreme
Apr12Extreme
May13Extreme
Jun11Extreme
Jul12Extreme
Aug14Extreme
Sep12Extreme
Oct12Extreme
Nov11Extreme
Dec8Very high

Air quality in Valvedditturai 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 Valvedditturai is worst in May — around 24 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateMay 1623 µg/m³Sep 1817 µg/m³
PM2.5 (µg/m³)Level
Jan20Moderate
Feb19Moderate
Mar20Moderate
Apr20Moderate
May24Moderate
Jun19Moderate
Jul18Moderate
Aug19Moderate
Sep17Moderate
Oct18Moderate
Nov17Moderate
Dec19Moderate
Location & terrain

Where is Valvedditturai?

Valvedditturai sits at 9.8°N, 80.2°E, 10 m above sea level, in Sri Lanka. The nearest listed city is Point Pedro, 7.0 km away.

JaffnaMullaittivuMannarVavuniyaAnuradhapuraTrincomaleePuttalam

Topography around Valvedditturai

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

Within 3 km, the terrain around Valvedditturai has only modest variations in elevation — a maximum elevation change of 22 m around an average of 6 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 25 m; within 80 km, only modest variations in elevation — a maximum elevation change of 99 m.

The land around Valvedditturai is covered by trees (40%) and water (30%) within 3 km, water (56%) within 16 km, and water (76%) within 80 km.

3 km
22 m
16 km
25 m
80 km
99 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetlandmangroves
September weather nearby: Point Pedro 7.0 km · Jaffna 24 km · Mullaittivu 94 km · Mannar 97 km · Vavuniya 124 km · Anuradhapura 169 km · Trincomalee 180 km · Puttalam 201 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 Valvedditturai (9.8167°, 80.1667°, elevation 10 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).