Polonnaruwa in Summer
In summer (June, July and August), Polonnaruwa sees average daytime highs around 35°C and overnight lows near 26°C, with 76 mm of rain over about 15 wet days across the season. It is the warmest season of the year and the driest season of the year.
Across summer, daytime highs hold fairly steady around 35°C. The sky is clear or mostly clear about 9% of the time across summer, and the air most often feels oppressive.
Summer is Polonnaruwa's weakest season of the year to visit on our travel score. For the whole year in context, see Polonnaruwa's year-round climate.
- Avg daytime high
- 35°C
- warmest season of the year
- Avg overnight low
- 26°C
- Rainfall
- 76 mm
- 15 wet days
- Avg wind
- 20 km/h
- Travel score
- 2.8
- weakest season of the year
- Months
- Jun · Jul · Aug
Temperature in Polonnaruwa in Summer
Across summer, daytime highs hold fairly steady around 35°C.
A typical summer day in Polonnaruwa reaches about 35°C and drops to 26°C overnight. The warmest of the three months is June, the coolest August.
How summer really feels in Polonnaruwa
Once humidity and wind are folded in, summer brings about 92 days that feel above 32°C and 0 that feel at or below 0°C.
The story in summer is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Polonnaruwa weather by month
How the three summer months (June, July and August) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 29° / 22° | 110 | 14.3 | 11.6 | 4.8 |
| Feb | 30° / 22° | 73 | 10.7 | 11.7 | 4.7 |
| Mar | 33° / 23° | 50 | 9.1 | 11.9 | 3.8 |
| Apr | 34° / 25° | 92 | 14.2 | 12.2 | 2.5 |
| May | 35° / 26° | 67 | 9.3 | 12.4 | 2.5 |
| Jun | 35° / 27° | 18 | 4.1 | 12.5 | 2.8 |
| Jul | 35° / 26° | 26 | 5.4 | 12.4 | 2.8 |
| Aug | 35° / 26° | 32 | 5.6 | 12.3 | 2.7 |
| Sep | 35° / 26° | 53 | 8.2 | 12 | 2.6 |
| Oct | 33° / 25° | 181 | 17.3 | 11.8 | 2.7 |
| Nov | 30° / 23° | 233 | 22.6 | 11.6 | 3.2 |
| Dec | 29° / 23° | 207 | 19.7 | 11.5 | 4.1 |
Cloud cover in Summer
The sky is clear or mostly clear about 9% of the time across summer.
Chance of precipitation in Summer
Polonnaruwa gets around 76 mm of rain over 15 wet days across summer. The line is the day-by-day chance of measurable precipitation.
Humidity in Summer
Most of summer feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Summer
Winds average 20 km/h across summer.
Sunrise & sunset in Summer
Daylight runs from about 12 h 24 min in early June to 12 h 12 min by late August. The lit band spans sunrise to sunset each day.
Solar energy in Summer
Average shortwave solar energy reaching the ground each day across summer, about 5.8 kWh/m².
Hazard calendar for Polonnaruwa
In summer, Polonnaruwa overlaps its cyclone season. The full year is below, with each hazard's peak months called out.
Polonnaruwa sits in the North Indian Ocean cyclone zone; the season peaks May and October–November.
Polonnaruwa's monsoon runs October–January, when most of the year's rain falls.
Is summer a good time to visit Polonnaruwa?
Our two travel scores rate summer for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
summer is a weaker month for outdoor sightseeing in Polonnaruwa.
What to pack for Polonnaruwa in Summer
From summer's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In summer, Polonnaruwa sees daytime highs around 35°C and nights near 26°C. Pack light clothes. Worth having: sun protection and a windbreaker. About 15 days see rain.
Sea temperature near Polonnaruwa in Summer
The nearest coast averages about 29°C across summer — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 63 km away) is warmest in May 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.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 27 | 28 | 29 | 30 | 30 | 30 | 29 | 29 | 29 | 29 | 29 | 28 |
| Comfort | Warm | Warm | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 27 | Warm |
| Feb | 28 | Warm |
| Mar | 29 | Tropical |
| Apr | 30 | Tropical |
| May | 30 | Tropical |
| Jun | 30 | Tropical |
| Jul | 29 | Tropical |
| Aug | 29 | Tropical |
| Sep | 29 | Tropical |
| Oct | 29 | Tropical |
| Nov | 29 | Tropical |
| Dec | 28 | Warm |
UV index in Polonnaruwa in Summer
Clear-sky midday UV across summer averages 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 Polonnaruwa peaks around April 20 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 10 (very high).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 10 | 12 | 13 | 14 | 14 | 11 | 11 | 12 | 13 | 12 | 11 | 10 |
| Level | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 10 | Extreme |
| Feb | 12 | Extreme |
| Mar | 13 | Extreme |
| Apr | 14 | Extreme |
| May | 14 | Extreme |
| Jun | 11 | Extreme |
| Jul | 11 | Extreme |
| Aug | 12 | Extreme |
| Sep | 13 | Extreme |
| Oct | 12 | Extreme |
| Nov | 11 | Extreme |
| Dec | 10 | Very high |
Air quality in Polonnaruwa in Summer
Average fine-particle pollution (PM2.5) through the year — so you can see where summer falls, not just the annual average.
Air quality in Polonnaruwa is worst in May — around 28 µg/m³ PM2.5 (moderate), and holds fairly steady the rest of the year.
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 22 | 21 | 24 | 27 | 28 | 21 | 20 | 20 | 21 | 25 | 24 | 22 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 22 | Moderate |
| Feb | 21 | Moderate |
| Mar | 24 | Moderate |
| Apr | 27 | Moderate |
| May | 28 | Moderate |
| Jun | 21 | Moderate |
| Jul | 20 | Moderate |
| Aug | 20 | Moderate |
| Sep | 21 | Moderate |
| Oct | 25 | Moderate |
| Nov | 24 | Moderate |
| Dec | 22 | Moderate |
Where is Polonnaruwa?
Polonnaruwa sits at 7.9°N, 81.0°E, 0 m above sea level, in Sri Lanka. The nearest listed city is Sigiriya, 28 km away.
Topography around Polonnaruwa
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Polonnaruwa.
Within 3 km, the terrain around Polonnaruwa has only modest variations in elevation — a maximum elevation change of 38 m around an average of 57 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 297 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,871 m.
The land around Polonnaruwa is covered by trees (48%) and cropland (20%) within 3 km, trees (58%) and cropland (29%) within 16 km, and trees (60%) within 80 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
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 Polonnaruwa (7.9397°, 81.0027°, elevation 0 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.