Tonga weather in August

In August, Tonga sees average daytime highs of 25°C and overnight lows near 19°C, with 171 mm of rain across 26.2 wet days and about 12.2 hours of daylight. It is the 12th-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 25°C through the month. The sky is clear or mostly clear about 1% of the time in August, and the air most often feels muggy.

Daylight stretches from about 12 h 12 min at the start of August to 12 h 06 min by month's end. Set against the rest of the year, August is Tonga's 11th-clearest and 2nd-windiest month. For the whole year in context, see Tonga's year-round climate.

Daytime high
25°
12th warmest
Overnight low
19°
7th coldest
Rainfall
171 mm
26.2 wet days
Daylight
12 h 12 min
6:16 AM – 6:26 PM
Cloud cover
85%
11th clearest
Wind
8 km/h
2nd windiest
Solar energy
4.25 kWh/m²
Travel score
4.1
out of 10

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 25°C through the month.

A typical August day in Tonga reaches about 25°C in the afternoon and slips back to 19°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 23°C and 27°C. Set against its neighbours, August runs on par with July and on par with September.

15°20°25°30°151015202531
Avg high (°C)Avg low (°C)
12519
22519
32519
42519
52519
62519
72519
82519
92519
102519
112519
122519
132519
142519
152519
162519
172519
182519
192519
202519
212519
222519
232519
242519
252619
262619
272619
282619
292619
302619
312619

How August really feels in Tonga

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

August 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 August compares with the rest of the year at a glance. August is the 12th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 19°82.511.75.0
Feb32° / 20°184.811.84.2
Mar31° / 20°7015.5123.8
Apr29° / 20°13322.412.13.6
May28° / 20°14725.412.23.8
Jun27° / 20°14025.712.34.0
Jul26° / 19°14225.612.34.2
Aug25° / 19°17126.212.24.1
Sep26° / 19°20727.9123.7
Oct27° / 19°20028.411.93.7
Nov28° / 19°7013.911.85.1
Dec30° / 19°102.511.75.8

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 1% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 6% of August, with mostly cloudy or overcast conditions the remaining 93%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
1793
2793
3793
4793
5793
6892
7892
8892
9892
10991
11991
12991
13991
14991
15991
16991
17892
18892
19892
20892
21694
22694
23694
24694
25595
26595
27595
28595
29595
30595
31595

Chance of precipitation in August

Any precipitation

Tonga gets around 171 mm of rain over 26.2 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 85% and peaks near 90% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%100%151015202531
Rain chance (%)
181
281
381
481
581
682
782
882
983
1083
1183
1284
1384
1484
1585
1685
1786
1886
1986
2086
2187
2287
2387
2488
2588
2688
2789
2889
2990
3090
3190

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, August lands in the muggy band about 98% of days. Sticky, muggy-or-worse air turns up on roughly 98% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)
1397
2397
3397
4397
5397
6397
7397
8397
9397
10397
11397
12397
13397
14397
15397
16298
17298
18298
19298
20298
21298
22298
23298
24298
25298
26199
27199
28199
29199
30199
31199

Wind in August

Winds average 8 km/h in August.

Across August, daily wind ranges from about 7 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in August

DaylightNight

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

Days shrink by about 6 minutes over August. Sunrise moves from 6:17 AM to 6:14 AM, and sunset from 6:30 PM to 6:20 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.26:176:30
212.26:176:30
312.26:176:29
412.26:176:29
512.26:176:29
612.26:176:29
712.26:176:29
812.26:176:28
912.26:176:28
1012.26:176:28
1112.26:176:28
1212.26:176:27
1312.26:176:27
1412.26:176:27
1512.26:166:27
1612.26:166:26
1712.26:166:26
1812.26:166:26
1912.26:166:25
2012.16:166:25
2112.16:166:24
2212.16:166:24
2312.16:166:24
2412.16:156:23
2512.16:156:23
2612.16:156:22
2712.16:156:22
2812.16:156:22
2912.16:156:21
3012.16:146:21
3112.16:146:20

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 4.25 kWh/m².

For context, solar energy here swings from a low near 4.24 kWh/m² to a high of 6.02 kWh/m² in February across the year — August's 4.25 kWh/m² sits near the bottom.

012345151015202531
Solar energy (kWh/m²)Level
14.2Bright
24.2Bright
34.2Bright
44.2Bright
54.2Bright
64.2Bright
74.2Bright
84.2Bright
94.2Bright
104.2Bright
114.2Bright
124.2Bright
134.2Bright
144.2Bright
154.2Bright
164.2Bright
174.2Bright
184.2Bright
194.2Bright
204.3Bright
214.3Bright
224.3Bright
234.3Bright
244.3Bright
254.3Bright
264.3Bright
274.3Bright
284.3Bright
294.3Bright
304.3Bright
314.3Bright
Planning a trip in August

Hazard calendar for Tonga

In seasonPeak

In August, Tonga sits inside 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 August a good time to visit Tonga?

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

4.1
Sightseeing
6th-best month of the year
3.7
Beach & pool
11th-best month of the year

August is a reasonable time to visit Tonga for sightseeing.

What to pack for Tonga in August

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

In August, Tonga sees daytime highs around 25°C and nights near 19°C. Pack rain gear. Worth having: light clothes. About 26 days see rain.

rain gearlight clothes

UV index in Tonga in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August 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 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.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highApr 10UV 14Dec 20UV 9
UV index (midday)Level
Jan10Very high
Feb11Extreme
Mar14Extreme
Apr14Extreme
May13Extreme
Jun11Extreme
Jul11Extreme
Aug12Extreme
Sep13Extreme
Oct13Extreme
Nov11Extreme
Dec9Very high

Air quality in Tonga in August

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where August 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).

0306090120JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorModeratePoorUnhealthyFeb 13105 µg/m³Aug 1422 µg/m³
PM2.5 (µg/m³)Level
Jan85Unhealthy
Feb109Unhealthy
Mar71Unhealthy
Apr54Poor
May34Moderate
Jun28Moderate
Jul23Moderate
Aug22Moderate
Sep24Moderate
Oct35Moderate
Nov44Poor
Dec71Unhealthy
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.

KekemMelong

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
16 km
1,087 m
80 km
2,002 m
treesshrubsgrasslandcroplandartificial surfaces
August 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
Roman Catholic 33%Muslim 31%Protestant 27%animist 1%

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. 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).