Kalutara weather in July

In July, Kalutara sees average daytime highs of 28°C and overnight lows near 25°C, with 294 mm of rain across 28.9 wet days and about 12.3 hours of daylight. It is the 10th-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 4% of the time in July, and the air most often feels miserable.

Daylight stretches from about 12 h 24 min at the start of July to 12 h 18 min by month's end. Set against the rest of the year, July is Kalutara's 12th-clearest and 2nd-windiest month. For the whole year in context, see Kalutara's year-round climate.

Daytime high
28°
10th warmest
Overnight low
25°
9th coldest
Rainfall
294 mm
28.9 wet days
Daylight
12 h 18 min
6:05 AM – 6:26 PM
Cloud cover
83%
12th clearest
Wind
16 km/h
2nd windiest
Solar energy
4.72 kWh/m²
Travel score
3.4
out of 10

Kalutara is city in Western Province, Sri Lanka.

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

Temperature in July

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 28°C through the month.

A typical July day in Kalutara reaches about 28°C in the afternoon and slips back to 25°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 29°C. Set against its neighbours, July runs on par with June and on par with August.

20°23°25°28°30°151015202531
Avg high (°C)Avg low (°C)
12826
22826
32826
42825
52825
62825
72825
82825
92825
102825
112825
122825
132825
142825
152825
162825
172825
182825
192825
202825
212825
222825
232825
242825
252825
262825
272825
282825
292825
302825
312825

How July really feels in Kalutara

Once humidity and wind are folded in, July averages 22 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
22
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in July is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Kalutara weather by month

How July compares with the rest of the year at a glance. July is the 10th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 24°7911.111.75.5
Feb29° / 24°649.911.85.4
Mar30° / 25°7914.3124.7
Apr30° / 26°18724.712.13.4
May29° / 26°33429.712.33.0
Jun28° / 26°33128.812.43.1
Jul28° / 25°29428.912.33.4
Aug28° / 25°26728.812.23.5
Sep28° / 25°29227.7123.6
Oct28° / 25°35027.711.93.5
Nov28° / 25°3362411.73.8
Dec28° / 24°18419.111.64.5

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 4% of the time in July, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 10% of July, with mostly cloudy or overcast conditions the remaining 86%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
11684
21684
31585
41585
51585
61585
71486
81486
91486
101486
111387
121387
131288
141288
151387
161387
171387
181387
191387
201387
211486
221486
231486
241585
251585
261585
271585
281684
291684
301783
311783

Chance of precipitation in July

Any precipitation

Kalutara gets around 294 mm of rain over 28.9 wet days in July. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 93% and peaks near 95% on the wettest days.

0%20%40%60%80%100%151015202531
Rain chance (%)
195
295
395
495
595
695
795
895
995
1095
1195
1294
1394
1494
1594
1693
1793
1893
1992
2092
2192
2292
2391
2491
2591
2692
2792
2892
2992
3092
3193

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, July lands in the miserable band about 65% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
12179
22377
32476
42575
52773
62872
72971
83070
93169
103268
113367
123565
133664
143763
153862
163961
174060
184060
194159
204159
214258
224258
234258
244258
254258
264159
274159
284060
294060
303961
313961

Wind in July

Winds average 16 km/h in July.

Across July, daily wind ranges from about 16 km/h on the calmest days to 16 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
116light breeze
216light breeze
316light breeze
416light breeze
516light breeze
616light breeze
716light breeze
816light breeze
916light breeze
1016light breeze
1116light breeze
1216light breeze
1316light breeze
1416light breeze
1516light breeze
1616light breeze
1716light breeze
1816light breeze
1916light breeze
2016light breeze
2116light breeze
2216light breeze
2316light breeze
2416light breeze
2516light breeze
2616light breeze
2716light breeze
2816light breeze
2916light breeze
3016light breeze
3116light breeze

Sunrise & sunset in July

DaylightNight

Daylight runs from about 12 h 24 min at the start of July to 12 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over July. Sunrise moves from 6:02 AM to 6:07 AM, and sunset from 6:25 PM to 6:25 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.46:026:25
212.46:026:25
312.46:036:25
412.46:036:25
512.46:036:25
612.46:036:26
712.46:036:26
812.46:046:26
912.46:046:26
1012.46:046:26
1112.46:046:26
1212.46:056:26
1312.46:056:26
1412.46:056:26
1512.46:056:26
1612.36:056:26
1712.36:066:26
1812.36:066:26
1912.36:066:26
2012.36:066:26
2112.36:066:26
2212.36:066:26
2312.36:066:26
2412.36:076:26
2512.36:076:26
2612.36:076:26
2712.36:076:26
2812.36:076:26
2912.36:076:25
3012.36:076:25
3112.36:076:25

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 4.72 kWh/m².

For context, solar energy here swings from a low near 4.47 kWh/m² to a high of 6.09 kWh/m² in March across the year — July's 4.72 kWh/m² falls in the middle.

024151015202531
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
124.7Bright
134.7Bright
144.7Bright
154.7Bright
164.7Bright
174.7Bright
184.7Bright
194.7Bright
204.7Bright
214.7Bright
224.7Bright
234.7Bright
244.7Bright
254.8Bright
264.8Bright
274.8Bright
284.8Bright
294.8Bright
304.8Bright
314.8Bright
Planning a trip in July

Hazard calendar for Kalutara

In seasonPeak

None of Kalutara's seasonal hazards are active in July. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Kalutara 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 July a good time to visit Kalutara?

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

3.4
Sightseeing
9th-best month of the year
3.8
Beach & pool
11th-best month of the year

July is a weaker month for outdoor sightseeing in Kalutara.

What to pack for Kalutara in July

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

In July, Kalutara sees daytime highs around 28°C and nights near 25°C. Pack light clothes and rain gear. Worth having: sun protection. About 29 days see rain.

light clothesrain gearsun protection

Sea temperature near Kalutara in July

The nearest coast averages about 28°C in July — 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 28°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
Aug28Warm
Sep28Warm
Oct28Tropical
Nov29Tropical
Dec28Tropical

UV index in Kalutara in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July 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 Kalutara 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 Kalutara in July

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Kalutara is worst in January — around 84 µg/m³ PM2.5 (unhealthy), about 2.8× the cleanest month (July, 29 µg/m³).

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

0306090JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorModeratePoorUnhealthyJan 1483 µg/m³Jul 2129 µg/m³
PM2.5 (µg/m³)Level
Jan84Unhealthy
Feb78Unhealthy
Mar73Unhealthy
Apr62Unhealthy
May44Poor
Jun31Moderate
Jul29Moderate
Aug30Moderate
Sep35Poor
Oct52Poor
Nov74Unhealthy
Dec81Unhealthy
Location & terrain

Where is Kalutara?

Kalutara sits at 6.6°N, 80.0°E, 7 m above sea level, in Sri Lanka. The nearest listed city is Beruwala, 12 km away.

HomagamaMaharagamaDehiwala-Mount LaviniaSri Jayewardenepura Kotte

Topography around Kalutara

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

Within 3 km, the terrain around Kalutara has only modest variations in elevation — a maximum elevation change of 45 m around an average of 6 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 277 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,145 m.

The land around Kalutara is covered by water (48%) and trees (41%) within 3 km, water (48%) and trees (46%) within 16 km, and trees (60%) and water (37%) within 80 km.

3 km
45 m
16 km
277 m
80 km
2,145 m
treesgrasslandcroplandartificial surfaceswater
July weather nearby: Beruwala 12 km · Panadura 16 km · Bentota 18 km · Moratuwa 23 km · Homagama 29 km · Maharagama 30 km · Dehiwala-Mount Lavinia 30 km · Sri Jayewardenepura Kotte 34 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 Kalutara (6.5831°, 79.9593°, elevation 7 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).