Tonga in Summer

In summer (June, July and August), Tonga sees average daytime highs around 26°C and overnight lows near 19°C, with 453 mm of rain over about 78 wet days across the season. It is the coldest season of the year and the 2nd-wettest season.

Across summer, daytime highs hold fairly steady around 26°C. The sky is clear or mostly clear about 2% of the time across summer, and the air most often feels muggy.

Summer is Tonga's 3rd-best season to visit on our travel score. For the whole year in context, see Tonga's year-round climate.

Avg daytime high: 26°C; coldest season of the year
Avg overnight low: 19°C
Rainfall: 453 mm; 78 wet days
Avg wind: 7 km/h
Travel score: 4.1; 3rd-best season
Months: Jun · Jul · Aug

← Spring Tonga year-round climate Fall →

Spring Summer Fall Winter

Temperature in Tonga in Summer

Average highAverage lowShaded bands: 10–90% of days

Across summer, daytime highs hold fairly steady around 26°C.

A typical summer day in Tonga reaches about 26°C and drops to 19°C overnight. The warmest of the three months is June, the coolest July.

How summer really feels in Tonga

Once humidity and wind are folded in, summer brings about 0 days that feel above 32°C and 0 that feel at or below 0°C.

Days feeling ≥ 32°C

heat index over the day's high

Days feeling ≤ 0°C

wind chill below the day's low

summer sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Tonga 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	31° / 19°	8	2.5	11.7	5.0
Feb	32° / 20°	18	4.8	11.8	4.2
Mar	31° / 20°	70	15.5	12	3.8
Apr	29° / 20°	133	22.4	12.1	3.6
May	28° / 20°	147	25.4	12.2	3.8
Jun	27° / 20°	140	25.7	12.3	4.0
Jul	26° / 19°	142	25.6	12.3	4.2
Aug	25° / 19°	171	26.2	12.2	4.1
Sep	26° / 19°	207	27.9	12	3.7
Oct	27° / 19°	200	28.4	11.9	3.7
Nov	28° / 19°	70	13.9	11.8	5.1
Dec	30° / 19°	10	2.5	11.7	5.8

Cloud cover in Summer

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 2% of the time across summer.

Chance of precipitation in Summer

Any precipitation

Tonga gets around 453 mm of rain over 78 wet days across summer. The line is the day-by-day chance of measurable precipitation.

Humidity in Summer

DryComfortableHumidMuggyOppressiveMiserable

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

Wind in Summer

Winds average 7 km/h across summer.

Sunrise & sunset in Summer

DaylightNight

Daylight runs from about 12 h 18 min in early June to 12 h 06 min by late August. The lit band spans sunrise to sunset each day.

Solar energy in Summer

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day across summer, about 4.3 kWh/m².

Planning a trip in summer

Hazard calendar for Tonga

In seasonPeak

In summer, Tonga overlaps its rainy season season. The full year is below, with each hazard's peak months called out.

Tonga's rainy season runs April–October, when most of the year's rain falls.

Tonga sees seasonal dust haze (February–April), heaviest in February.

Rainy season

Dust

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is summer a good time to visit Tonga?

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.

4.1

Sightseeing

3rd-best month of the year

3.9

Beach & pool

4th-best month of the year

summer is a reasonable time to visit Tonga for sightseeing.

What to pack for Tonga in Summer

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

In summer, Tonga sees daytime highs around 26°C and nights near 19°C. Pack rain gear. Worth having: light clothes. About 78 days see rain.

rain gearlight clothes

UV index in Tonga in Summer

LowModerateHighVery highExtreme

Clear-sky midday UV across summer averages 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 Tonga peaks around April 10 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 9 (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	11	14	14	13	11	11	12	13	13	11	9
Level	Very high	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Extreme	Very high

	UV index (midday)	Level
Jan	10	Very high
Feb	11	Extreme
Mar	14	Extreme
Apr	14	Extreme
May	13	Extreme
Jun	11	Extreme
Jul	11	Extreme
Aug	12	Extreme
Sep	13	Extreme
Oct	13	Extreme
Nov	11	Extreme
Dec	9	Very high

Air quality in Tonga in Summer

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Tonga is worst in February — around 109 µg/m³ PM2.5 (unhealthy), about 4.9× the cleanest month (August, 22 µg/m³).

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

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	85	109	71	54	34	28	23	22	24	35	44	71
Level	Unhealthy	Unhealthy	Unhealthy	Poor	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Poor	Unhealthy

	PM2.5 (µg/m³)	Level
Jan	85	Unhealthy
Feb	109	Unhealthy
Mar	71	Unhealthy
Apr	54	Poor
May	34	Moderate
Jun	28	Moderate
Jul	23	Moderate
Aug	22	Moderate
Sep	24	Moderate
Oct	35	Moderate
Nov	44	Poor
Dec	71	Unhealthy

Location & terrain

Where is Tonga?

Tonga sits at 5.0°N, 10.7°E, 809 m above sea level, in Cameroon. The nearest listed city is Bangangté, 27 km away.

Topography around Tonga

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

Within 3 km, the terrain around Tonga has only modest variations in elevation — a maximum elevation change of 178 m around an average of 795 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,087 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,002 m.

The land around Tonga is covered by trees (63%) and grassland (30%) within 3 km, trees (78%) and grassland (20%) within 16 km, and trees (80%) within 80 km.

3 km

178 m

trees 63%

16 km

1,087 m

trees 78%

80 km

2,002 m

trees 80%

treesshrubsgrasslandcroplandartificial surfaces

← Spring Tonga year-round climate Fall →

Summer weather nearby: Bangangté 27 km · Bandjoun 55 km · Foumbot 61 km · Bafang 62 km · Bafia 64 km · Bafoussam 65 km · Kekem 78 km · Melong 84 km

Cameroon travel facts

Travel advisory: Level 2; Exercise Increased Caution
Power plugs: Type C / E; 220 V · 50 Hz
Prices: ≈ 34% of US; price level, 2025
GDP per capita: $1,972; 2025
Happiness: 5.1 / 10; World Happiness, 2025
Homicide rate: 6.8; per 100k, 2022
Road deaths: 30.2; per 100k/yr, 2019
Income group: Lower middle; World Bank
English: Very low; EF EPI 445
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 Tonga (4.9667°, 10.7°, elevation 809 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.