Tonga weather in December

In December, Tonga sees average daytime highs of 30°C and overnight lows near 19°C, with 10 mm of rain across 2.5 wet days and about 11.7 hours of daylight. It is the 4th-warmest and 11th-wettest month of the year here.

Highs climb over the month, from about 29°C in the first days to 31°C by the end. The sky is clear or mostly clear about 39% of the time in December, and the air most often feels humid.

Daylight stretches from about 11 h 42 min at the start of December to 11 h 42 min by month's end. Set against the rest of the year, December is Tonga's 1st-clearest and 6th-windiest month. For the whole year in context, see Tonga's year-round climate.

Daytime high
30°
4th warmest
Overnight low
19°
2nd coldest
Rainfall
10 mm
2.5 wet days
Daylight
11 h 42 min
6:22 AM – 6:05 PM
Cloud cover
51%
1st clearest
Wind
7 km/h
6th windiest
Solar energy
5.51 kWh/m²
Travel score
5.8
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 29°C in the first days to 31°C by the end.

A typical December day in Tonga reaches about 30°C in the afternoon and slips back to 19°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 32°C. Set against its neighbours, December runs about 2°C warmer than November and about 1°C cooler than January.

15°20°25°30°35°151015202531
Avg high (°C)Avg low (°C)
12919
22919
32919
42919
52919
63019
73019
83019
93019
103019
113019
123019
133019
143019
153019
163019
173019
183019
193019
203019
213019
223119
233119
243119
253119
263119
273119
283119
293119
303119
313119

How December really feels in Tonga

Once humidity and wind are folded in, December 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

December 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 December compares with the rest of the year at a glance. December is the 4th-warmest and 11th-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 December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 39% of the time in December, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 20% of December, with mostly cloudy or overcast conditions the remaining 40%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14852
24951
35050
45248
55248
65446
75446
85545
95644
105842
115842
125941
136040
146139
156139
166238
176436
186436
196535
206535
216535
226634
236535
246535
256535
266436
276436
286238
296238
306139
316040

Chance of precipitation in December

Any precipitation

Tonga gets around 10 mm of rain over 2.5 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 8% and peaks near 20% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%151015202531
Rain chance (%)
120
219
318
417
516
615
714
813
912
1011
1110
1210
139
148
157
166
176
185
195
204
214
223
233
243
253
263
273
283
293
304
314

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the humid band about 53% of days. Sticky, muggy-or-worse air turns up on roughly 37% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1033067
2033265
3033364
4043561
5043660
6053857
7053956
8054154
9064351
10064449
11074647
12074845
13175042
14185140
15185338
16195535
17195733
18196030
191106128
201106326
211106524
222106622
232116621
242116819
252116918
263126718
273126817
284126717
294136617
305136616
316136516

Wind in December

Winds average 7 km/h in December.

Across December, daily wind ranges from about 6 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm
317calm

Sunrise & sunset in December

DaylightNight

Daylight runs from about 11 h 42 min at the start of December to 11 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 0 minutes over December. Sunrise moves from 6:15 AM to 6:29 AM, and sunset from 5:59 PM to 6:12 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.76:155:59
211.76:155:59
311.76:166:00
411.76:166:00
511.76:176:00
611.76:176:01
711.76:186:01
811.76:186:01
911.76:196:02
1011.76:196:02
1111.76:206:03
1211.76:206:03
1311.76:216:03
1411.76:216:04
1511.76:216:04
1611.76:226:05
1711.76:226:05
1811.76:236:06
1911.76:236:06
2011.76:246:07
2111.76:246:07
2211.76:256:08
2311.76:256:08
2411.76:266:08
2511.76:266:09
2611.76:276:09
2711.76:276:10
2811.76:286:10
2911.76:286:11
3011.76:286:11
3111.76:296:12

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 5.51 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 — December's 5.51 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
15.3Bright
25.3Bright
35.3Bright
45.3Bright
55.3Bright
65.4Bright
75.4Bright
85.4Bright
95.4Bright
105.4Bright
115.4Bright
125.5Bright
135.5Bright
145.5Bright
155.5Bright
165.5Bright
175.5Bright
185.6Bright
195.6Bright
205.6Bright
215.6Bright
225.6Bright
235.6Bright
245.6Bright
255.6Bright
265.7Bright
275.7Bright
285.7Bright
295.7Bright
305.7Bright
315.7Bright
Planning a trip in December

Hazard calendar for Tonga

In seasonPeak

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

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 December a good time to visit Tonga?

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

5.8
Sightseeing
1st-best month of the year
8.0
Beach & pool
1st-best month of the year

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

What to pack for Tonga in December

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

In December, Tonga sees daytime highs around 30°C and nights near 19°C. Pack light clothes. Worth having: sun protection.

light clothessun protection

UV index in Tonga in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 9 (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 December

GoodModeratePoorUnhealthyVery unhealthy

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