Mannar weather in April

In April, Mannar sees average daytime highs of 31°C and overnight lows near 27°C, with 78 mm of rain across 13.4 wet days and about 12.2 hours of daylight. It is the 1st-warmest and 4th-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 39% of the time in April, and the air most often feels miserable.

Daylight stretches from about 12 h 06 min at the start of April to 12 h 18 min by month's end. Set against the rest of the year, April is Mannar's 3rd-clearest and 11th-windiest month. For the whole year in context, see Mannar's year-round climate.

Daytime high
31°
1st warmest
Overnight low
27°
9th coldest
Rainfall
78 mm
13.4 wet days
Daylight
12 h 12 min
6:05 AM – 6:17 PM
Cloud cover
54%
3rd clearest
Wind
14 km/h
11th windiest
Solar energy
6.04 kWh/m²
Travel score
4.1
out of 10

Mannar is town in Sri Lanka.

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

Temperature in April

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 31°C through the month.

A typical April day in Mannar 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 30°C and 33°C. Set against its neighbours, April runs on par with March and on par with May.

25°28°30°33°35°151015202530
Avg high (°C)Avg low (°C)
13126
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
293127
303127

How April really feels in Mannar

Once humidity and wind are folded in, April 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
8 feel dangerously hot (≥ 39°C)
Days feeling ≤ C
0
wind chill below the day's low

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

Mannar weather by month

How April compares with the rest of the year at a glance. April is the 1st-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 24°586.711.56.6
Feb29° / 24°274.611.76.2
Mar31° / 25°295.511.95.2
Apr31° / 27°7813.412.24.1
May31° / 28°699.812.44.4
Jun31° / 28°245.612.54.9
Jul30° / 27°235.812.55.0
Aug30° / 27°336.812.35.0
Sep30° / 27°569.812.14.8
Oct29° / 26°18620.511.83.9
Nov28° / 25°24722.211.64.1
Dec28° / 24°15115.311.55.5

Cloud cover in April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 39% of the time in April.

Beyond those clear spells, partly cloudy skies cover about 20% of April, with mostly cloudy or overcast conditions the remaining 41%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16832
26733
36733
46634
56535
66535
76436
86436
96238
106238
116139
126040
136040
146040
155842
165842
175842
185842
195743
205644
215644
225446
235347
245347
255248
265248
275149
285050
295050
305050

Chance of precipitation in April

Any precipitation

Mannar gets around 78 mm of rain over 13.4 wet days in April. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 44% and peaks near 47% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
134
236
338
439
541
642
744
845
945
1046
1146
1247
1347
1446
1546
1646
1746
1845
1945
2045
2145
2245
2345
2445
2545
2645
2746
2846
2946
3046

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, April lands in the miserable band about 80% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Muggy (%)Oppressive (%)Miserable (%)
144452
234255
334057
423860
523662
613465
713267
813069
912772
1002575
1102377
1202179
1301981
1401783
1501684
1601585
1701387
1801288
1901189
2001090
210991
220991
230892
240793
250694
260694
270595
280595
290496
300496

Wind in April

Winds average 14 km/h in April.

Across April, daily wind ranges from about 13 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
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1314light breeze
1414light breeze
1514light breeze
1614light breeze
1714light breeze
1814light breeze
1915light breeze
2015light breeze
2115light breeze
2215light breeze
2316light breeze
2416light breeze
2516light breeze
2617light breeze
2717light breeze
2818light breeze
2918light breeze
3018light breeze

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 06 min at the start of April to 12 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 12 minutes over April. Sunrise moves from 6:13 AM to 5:59 AM, and sunset from 6:17 PM to 6:17 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.16:136:17
212.16:126:17
312.16:126:17
412.16:116:17
512.16:116:17
612.16:106:17
712.16:106:17
812.16:096:17
912.16:086:17
1012.16:086:17
1112.26:076:17
1212.26:076:17
1312.26:066:17
1412.26:066:17
1512.26:056:17
1612.26:056:17
1712.26:046:17
1812.26:046:17
1912.26:036:17
2012.26:036:17
2112.26:026:17
2212.26:026:17
2312.36:016:17
2412.36:016:17
2512.36:016:17
2612.36:006:17
2712.36:006:17
2812.35:596:17
2912.35:596:17
3012.35:596:17

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 6.04 kWh/m².

For context, solar energy here swings from a low near 4.06 kWh/m² to a high of 6.38 kWh/m² in March across the year — April's 6.04 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.3Intense
26.2Intense
36.2Intense
46.2Intense
56.2Intense
66.1Intense
76.1Intense
86.1Intense
96.1Intense
106.1Intense
116.1Intense
126.1Intense
136.0Intense
146.0Intense
156.0Intense
166.0Intense
176.0Intense
186.0Intense
196.0Intense
206.0Intense
216.0Intense
226.0Intense
236.0Intense
246.0Intense
256.0Intense
266.0Bright
276.0Bright
286.0Bright
296.0Bright
306.0Bright
Planning a trip in April

Hazard calendar for Mannar

In seasonPeak

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

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

Mannar'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 April a good time to visit Mannar?

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

4.1
Sightseeing
10th-best month of the year
6.2
Beach & pool
9th-best month of the year

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

What to pack for Mannar in April

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

In April, Mannar sees daytime highs around 31°C and nights near 27°C. Pack light clothes and sun protection. Worth having: rain gear. About 13 days see rain.

light clothessun protectionrain gear

Sea temperature near Mannar in April

The nearest coast averages about 30°C in April — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 13 km away) 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
Feb28Warm
Mar29Tropical
Apr30Tropical
May30Tropical
Jun29Tropical
Jul28Tropical
Aug28Tropical
Sep28Tropical
Oct29Tropical
Nov29Tropical
Dec28Warm

UV index in Mannar in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April 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 Mannar peaks around April 17 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 9 at about 9 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highApr 17UV 13Jan 9UV 9
UV index (midday)Level
Jan9Very high
Feb12Extreme
Mar13Extreme
Apr13Extreme
May13Extreme
Jun11Extreme
Jul12Extreme
Aug13Extreme
Sep12Extreme
Oct12Extreme
Nov11Extreme
Dec9Very high

Air quality in Mannar in April

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Mannar 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 1323 µg/m³Sep 1516 µg/m³
PM2.5 (µg/m³)Level
Jan20Moderate
Feb19Moderate
Mar21Moderate
Apr22Moderate
May24Moderate
Jun18Moderate
Jul17Moderate
Aug18Moderate
Sep16Moderate
Oct18Moderate
Nov18Moderate
Dec19Moderate
Location & terrain

Where is Mannar?

Mannar sits at 9.0°N, 79.9°E, 9 m above sea level, in Sri Lanka. The nearest listed city is Vavuniya, 73 km away.

VavuniyaJaffnaAnuradhapuraValvedditturaiPoint PedroPuttalamMullaittivuSigiriya

Topography around Mannar

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

Within 3 km, the terrain around Mannar 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 13 m; within 80 km, only modest variations in elevation — a maximum elevation change of 174 m.

The land around Mannar is covered by water (39%) and trees (24%) within 3 km, water (73%) within 16 km, and water (56%) and trees (33%) within 80 km.

3 km
11 m
16 km
13 m
80 km
174 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetlandmangroves
April weather nearby: Vavuniya 73 km · Jaffna 77 km · Anuradhapura 96 km · Valvedditturai 97 km · Point Pedro 100 km · Puttalam 106 km · Mullaittivu 107 km · Sigiriya 150 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 Mannar (8.9894°, 79.8784°, 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).