Jaffna weather in July

In July, Jaffna sees average daytime highs of 30°C and overnight lows near 28°C, with 33 mm of rain across 9.2 wet days and about 12.5 hours of daylight. It is the 4th-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 8% of the time in July, and the air most often feels miserable.

Daylight stretches from about 12 h 36 min at the start of July to 12 h 24 min by month's end. Set against the rest of the year, July is Jaffna's 12th-clearest and 3rd-windiest month. For the whole year in context, see Jaffna's year-round climate.

Daytime high
30°
4th warmest
Overnight low
28°
10th coldest
Rainfall
33 mm
9.2 wet days
Daylight
12 h 30 min
6:00 AM – 6:31 PM
Cloud cover
82%
12th clearest
Wind
26 km/h
3rd windiest
Solar energy
5.74 kWh/m²
Travel score
4.9
out of 10

Jaffna is capital city of the Northern Province of Sri Lanka.

Density
8,371/km²
people per km²
Founded
1621

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 30°C through the month.

A typical July day in Jaffna reaches about 30°C in the afternoon and slips back to 28°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 30°C. Set against its neighbours, July runs on par with June and on par with August.

25°28°30°33°35°151015202531
Avg high (°C)Avg low (°C)
13028
23028
33028
43028
53028
63028
73028
83028
93028
103028
113028
123028
133028
143028
153028
163028
173028
183028
193028
203028
213028
223028
233028
242928
252928
262928
272928
282928
292928
302928
312928

How July really feels in Jaffna

Once humidity and wind are folded in, July averages 31 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
31
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.

Jaffna weather by month

How July compares with the rest of the year at a glance. July is the 4th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 25°626.711.57.0
Feb28° / 25°254.211.77.4
Mar29° / 26°223.411.96.5
Apr30° / 28°457.712.25.2
May30° / 28°587.612.45.0
Jun30° / 28°275.512.65.2
Jul30° / 28°339.212.54.9
Aug29° / 28°4810.512.35.0
Sep29° / 27°671212.14.9
Oct29° / 27°20820.911.84.2
Nov28° / 26°3132211.64.5
Dec27° / 25°20016.311.45.5

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 8% of the time in July, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 9% of July, with mostly cloudy or overcast conditions the remaining 83%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12278
22278
32278
42278
52179
62080
71981
81981
91981
101981
111882
121981
131882
141882
151882
161783
171783
181684
191684
201585
211486
221486
231486
241387
251387
261387
271387
281486
291486
301585
311684

Chance of precipitation in July

Any precipitation

Jaffna gets around 33 mm of rain over 9.2 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 29% and peaks near 34% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)
120
221
322
423
524
625
726
827
929
1030
1131
1232
1332
1433
1533
1634
1734
1833
1933
2033
2133
2232
2332
2431
2531
2630
2730
2829
2929
3028
3128

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 96% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
1397
2397
3397
4397
5397
6397
7496
8496
9496
10496
11496
12496
13496
14496
15496
16496
17496
18496
19496
20496
21595
22595
23595
24595
25595
26595
27694
28694
29694
30694
31694

Wind in July

Winds average 26 km/h in July.

Across July, daily wind ranges from about 26 km/h on the calmest days to 28 km/h at its breeziest. It stays fairly steady from day to day.

0102030151015202531
Wind speed (km/h)Feels
128breezy
228breezy
328breezy
428breezy
527breezy
627breezy
727breezy
827breezy
927breezy
1027breezy
1126breezy
1226breezy
1326breezy
1426breezy
1526breezy
1626breezy
1726breezy
1826breezy
1926breezy
2026breezy
2126breezy
2226breezy
2326breezy
2426breezy
2526breezy
2626breezy
2726breezy
2826breezy
2926breezy
3026breezy
3127breezy

Sunrise & sunset in July

DaylightNight

Daylight runs from about 12 h 36 min at the start of July to 12 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 12 minutes over July. Sunrise moves from 5:57 AM to 6:03 AM, and sunset from 6:30 PM to 6:29 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.65:576:30
212.65:576:30
312.65:576:30
412.65:576:30
512.65:586:31
612.55:586:31
712.55:586:31
812.55:586:31
912.55:596:31
1012.55:596:31
1112.55:596:31
1212.55:596:31
1312.55:596:31
1412.56:006:31
1512.56:006:31
1612.56:006:31
1712.56:006:31
1812.56:016:31
1912.56:016:31
2012.56:016:31
2112.56:016:31
2212.56:016:31
2312.56:026:31
2412.56:026:30
2512.56:026:30
2612.56:026:30
2712.56:026:30
2812.56:036:30
2912.46:036:30
3012.46:036:29
3112.46:036:29

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 5.74 kWh/m².

For context, solar energy here swings from a low near 4.22 kWh/m² to a high of 6.58 kWh/m² in March across the year — July's 5.74 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.9Bright
25.9Bright
35.9Bright
45.9Bright
55.9Bright
65.8Bright
75.8Bright
85.8Bright
95.8Bright
105.8Bright
115.8Bright
125.8Bright
135.7Bright
145.7Bright
155.7Bright
165.7Bright
175.7Bright
185.7Bright
195.7Bright
205.7Bright
215.7Bright
225.7Bright
235.7Bright
245.7Bright
255.7Bright
265.7Bright
275.7Bright
285.7Bright
295.8Bright
305.8Bright
315.8Bright
Planning a trip in July

Hazard calendar for Jaffna

In seasonPeak

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

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

Jaffna'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 July a good time to visit Jaffna?

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

4.9
Sightseeing
9th-best month of the year
6.7
Beach & pool
7th-best month of the year

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

What to pack for Jaffna in July

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

In July, Jaffna sees daytime highs around 30°C and nights near 28°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 Jaffna in July

The nearest coast averages about 29°C in July — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 14 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
Feb27Warm
Mar29Tropical
Apr30Tropical
May30Tropical
Jun29Tropical
Jul29Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov28Tropical
Dec27Warm

UV index in Jaffna in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July 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 Jaffna peaks around August 17 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 17UV 13Jan 11UV 8
UV index (midday)Level
Jan8Very high
Feb12Extreme
Mar12Extreme
Apr13Extreme
May13Extreme
Jun11Extreme
Jul12Extreme
Aug14Extreme
Sep12Extreme
Oct12Extreme
Nov11Extreme
Dec9Very high

Air quality in Jaffna 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 Jaffna 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 Jaffna?

Jaffna sits at 9.7°N, 80.0°E, 7 m above sea level, in Sri Lanka. The nearest listed city is Valvedditturai, 24 km away.

ValvedditturaiPoint PedroMannarMullaittivuVavuniyaAnuradhapuraTrincomaleePuttalam

Topography around Jaffna

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

Within 3 km, the terrain around Jaffna has only modest variations in elevation — a maximum elevation change of 16 m around an average of 4 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 22 m; within 80 km, only modest variations in elevation — a maximum elevation change of 99 m.

The land around Jaffna is covered by water (45%), trees (26%) and artificial surfaces (22%) within 3 km, water (46%) and trees (24%) within 16 km, and water (77%) within 80 km.

3 km
16 m
16 km
22 m
80 km
99 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetlandmangroves
July weather nearby: Valvedditturai 24 km · Point Pedro 30 km · Mannar 77 km · Mullaittivu 99 km · Vavuniya 115 km · Anuradhapura 157 km · Trincomalee 181 km · Puttalam 183 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 Jaffna (9.6684°, 80.0074°, 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).