Dehiwala-Mount Lavinia weather in June

In June, Dehiwala-Mount Lavinia sees average daytime highs of 29°C and overnight lows near 26°C, with 257 mm of rain across 26.5 wet days and about 12.4 hours of daylight. It is the 7th-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 4% of the time in June, and the air most often feels miserable.

Daylight stretches from about 12 h 24 min at the start of June to 12 h 24 min by month's end. Set against the rest of the year, June is Dehiwala-Mount Lavinia's 11th-clearest and 1st-windiest month. For the whole year in context, see Dehiwala-Mount Lavinia's year-round climate.

Daytime high
29°
7th warmest
Overnight low
26°
11th coldest
Rainfall
257 mm
26.5 wet days
Daylight
12 h 24 min
5:59 AM – 6:23 PM
Cloud cover
83%
11th clearest
Wind
20 km/h
1st windiest
Solar energy
4.81 kWh/m²
Travel score
3.3
out of 10

Dehiwala-Mount Lavinia is suburb of Colombo, Western Province, Sri Lanka.

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

Temperature in June

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 29°C through the month.

A typical June day in Dehiwala-Mount Lavinia reaches about 29°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 28°C and 29°C. Set against its neighbours, June runs on par with May and on par with July.

24°26°28°30°32°151015202530
Avg high (°C)Avg low (°C)
12926
22926
32926
42926
52926
62926
72926
82926
92926
102926
112926
122926
132926
142926
152926
162926
172926
182926
192926
202926
212926
222926
232926
242926
252926
262926
272826
282826
292826
302826

How June really feels in Dehiwala-Mount Lavinia

Once humidity and wind are folded in, June 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 June is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Dehiwala-Mount Lavinia weather by month

How June compares with the rest of the year at a glance. June is the 7th-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 25°608.811.65.4
Feb30° / 25°578.511.85.2
Mar30° / 26°7514.9124.5
Apr30° / 26°17424.412.13.3
May29° / 27°2932912.33.0
Jun29° / 26°25726.512.43.3
Jul28° / 26°20525.312.43.7
Aug28° / 26°18324.612.23.8
Sep28° / 26°23224.3123.7
Oct28° / 25°3282611.83.6
Nov29° / 25°33023.811.73.7
Dec29° / 25°17516.711.64.6

Cloud cover in June

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 4% of the time in June.

Beyond those clear spells, partly cloudy skies cover about 12% of June, with mostly cloudy or overcast conditions the remaining 84%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
11387
21288
31288
41189
51189
61189
71288
81288
91387
101387
111486
121486
131684
141684
151783
161882
171882
181981
191981
201981
211981
221981
232080
242080
251981
261882
271882
281882
291684
301684

Chance of precipitation in June

Any precipitation

Dehiwala-Mount Lavinia gets around 257 mm of rain over 26.5 wet days in June. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 89% and peaks near 95% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%100%151015202530
Rain chance (%)
195
295
395
495
595
694
794
893
993
1092
1191
1290
1390
1489
1588
1687
1787
1886
1986
2085
2185
2285
2384
2485
2585
2685
2785
2885
2985
3084

Humidity in June

DryComfortableHumidMuggyOppressiveMiserable

Most of June feels miserable — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, June lands in the miserable band about 96% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Oppressive (%)Miserable (%)
1298
2397
3397
4397
5496
6496
7496
8496
9496
10496
11496
12496
13496
14496
15496
16496
17397
18397
19397
20397
21397
22397
23496
24496
25496
26595
27595
28694
29694
30793

Wind in June

Winds average 20 km/h in June, the windiest month of the year.

Across June, daily wind ranges from about 19 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
119light breeze
220light breeze
320light breeze
420light breeze
520light breeze
620light breeze
720light breeze
820light breeze
920light breeze
1020light breeze
1120light breeze
1220breezy
1320breezy
1420breezy
1520breezy
1620breezy
1720breezy
1820breezy
1920breezy
2020breezy
2120breezy
2220breezy
2320breezy
2420breezy
2520light breeze
2620light breeze
2720light breeze
2820light breeze
2920light breeze
3020light breeze

Sunrise & sunset in June

DaylightNight

Daylight runs from about 12 h 24 min at the start of June to 12 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 0 minutes over June. Sunrise moves from 5:57 AM to 6:02 AM, and sunset from 6:19 PM to 6:25 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.45:576:19
212.45:576:19
312.45:576:20
412.45:576:20
512.45:576:20
612.45:576:20
712.45:586:20
812.45:586:21
912.45:586:21
1012.45:586:21
1112.45:586:21
1212.45:586:22
1312.45:586:22
1412.45:596:22
1512.45:596:22
1612.45:596:23
1712.45:596:23
1812.45:596:23
1912.45:596:23
2012.46:006:24
2112.46:006:24
2212.46:006:24
2312.46:006:24
2412.46:016:24
2512.46:016:25
2612.46:016:25
2712.46:016:25
2812.46:016:25
2912.46:026:25
3012.46:026:25

Solar energy in June

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in June, about 4.81 kWh/m².

For context, solar energy here swings from a low near 4.62 kWh/m² to a high of 6.26 kWh/m² in March across the year — June's 4.81 kWh/m² sits near the bottom.

024151015202530
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.7Bright
44.7Bright
54.7Bright
64.7Bright
74.7Bright
84.7Bright
94.7Bright
104.7Bright
114.7Bright
124.8Bright
134.8Bright
144.8Bright
154.8Bright
164.8Bright
174.8Bright
184.9Bright
194.9Bright
204.9Bright
214.9Bright
224.9Bright
234.9Bright
244.9Bright
254.9Bright
264.9Bright
274.9Bright
284.9Bright
294.9Bright
304.9Bright
Planning a trip in June

Hazard calendar for Dehiwala-Mount Lavinia

In seasonPeak

In June, Dehiwala-Mount Lavinia sits inside its cyclone season. The full year is below, with each hazard's peak months called out.

Dehiwala-Mount Lavinia 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 June a good time to visit Dehiwala-Mount Lavinia?

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

3.3
Sightseeing
10th-best month of the year
4.0
Beach & pool
11th-best month of the year

June is a weaker month for outdoor sightseeing in Dehiwala-Mount Lavinia.

What to pack for Dehiwala-Mount Lavinia in June

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

In June, Dehiwala-Mount Lavinia sees daytime highs around 29°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 Dehiwala-Mount Lavinia in June

The nearest coast averages about 28°C in June — 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 August 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
Jan28Warm
Feb28Tropical
Mar29Tropical
Apr30Tropical
May29Tropical
Jun28Tropical
Jul28Warm
Aug27Warm
Sep28Warm
Oct28Tropical
Nov29Tropical
Dec28Tropical

UV index in Dehiwala-Mount Lavinia in June

LowModerateHighVery highExtreme

Clear-sky midday UV in June peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Dehiwala-Mount Lavinia peaks around September 10 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 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 highSep 10UV 13Dec 15UV 10
UV index (midday)Level
Jan10Extreme
Feb12Extreme
Mar12Extreme
Apr12Extreme
May12Extreme
Jun11Extreme
Jul11Extreme
Aug13Extreme
Sep13Extreme
Oct12Extreme
Nov10Extreme
Dec10Very high

Air quality in Dehiwala-Mount Lavinia in June

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where June falls, not just the annual average.

Air quality in Dehiwala-Mount Lavinia is worst in February — around 37 µg/m³ PM2.5 (poor), about 2.1× the cleanest month (September, 18 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecPoorModerateFeb 1437 µg/m³Sep 1118 µg/m³
PM2.5 (µg/m³)Level
Jan36Poor
Feb37Poor
Mar36Poor
Apr28Moderate
May24Moderate
Jun19Moderate
Jul18Moderate
Aug18Moderate
Sep18Moderate
Oct20Moderate
Nov30Moderate
Dec34Moderate
Location & terrain

Where is Dehiwala-Mount Lavinia?

Dehiwala-Mount Lavinia sits at 6.8°N, 79.9°E, 16 m above sea level, in Sri Lanka. The nearest listed city is Maharagama, 6.0 km away.

Topography around Dehiwala-Mount Lavinia

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Dehiwala-Mount Lavinia.

Within 3 km, the terrain around Dehiwala-Mount Lavinia has only modest variations in elevation — a maximum elevation change of 33 m around an average of 7 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 74 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,145 m.

The land around Dehiwala-Mount Lavinia is covered by artificial surfaces (51%) and water (32%) within 3 km, water (50%), trees (25%) and artificial surfaces (21%) within 16 km, and trees (59%) and water (37%) within 80 km.

3 km
33 m
16 km
74 m
80 km
2,145 m
treesgrasslandcroplandartificial surfacesbare terrainwater
June weather nearby: Maharagama 6.0 km · Sri Jayewardenepura Kotte 6.0 km · Pita Kotte 7.0 km · Moratuwa 8.0 km · Battaramulla South 8.0 km · Kolonnawa 10 km · Kotikawatta 11 km · Colombo 11 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 Dehiwala-Mount Lavinia (6.8402°, 79.8712°, elevation 16 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).