The month in detail
What to expect in December
Summer in Tonga brings pleasant temperatures (81°F) and long sunny days (7.2h of sunshine). Expect rain on 39% of days — a light raincoat in the bag is recommended. A good balance between weather and crowds, even if June (8.2/10) remains theoretically better.
December ranks 7 out of 12 months in Tonga. Compared to November: +2°F daytime, 5 pts more rainy days.
This month's conditions
What it's like in December
UV index
9 · very high
protection essential
Feels like
very humid
21°
Sea
27°C
warm, ideal
Daylight
13.3h of daylight
Air quality
excellent
AQI 14
Compare
Is December the right month?
The best month in Tonga is June (8.2/10), 0.2 pt higher than December.
Book
Plan your trip
Hotels at their lowest outside peak season, highest on comfortable months. Shoulder seasons offer a good price/climate compromise.
Stay
Hotels & rentals · Tonga
Expedia →
Activities
Tours, tickets, experiences
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Flights
Multi-airline comparator
Kiwi →
🎟️ Activities & tours · Tonga
GetYourGuide selection · free cancellation
Practical info
What you need to know before you go
Three angles: the country (language, currency, safety, budget), the year-round climate, and the specifics of a tropical stay.
Country · Tonga
🗣️LanguageTongan
💶CurrencyPaʻanga tongan (T$)
🚗DrivingLeft-hand
🛡️Safety ⓘVery safe · 1/5
💰Cost of living ⓘCheap · 2/5
🌡️ Climate
🌍Climate typeTropical
📈Climate trend ⓘ+1.54°F/decade
🔥Hottest monthJanuary · 82°F
❄️Coolest monthAugust · 73°F
🌧️Rainiest month ⓘFebruary · 60%
🏝️ Tropical stay
🌞Dry season ⓘMay → Sep
🌧️Wet season ⓘDec → Mar
🌀Cyclones ⓘSeason Nov-Apr
Explore
Other destinations in December
If December doesn't convince you for this destination, compare with others.
Location
Where is Tonga ?
Global position + regional geographic context.
🌍 World
🔍 Geographic context
TongaTropical climate with a 8.2 → 5.0 gap between best and worst month. 10 years of ERA5 data to choose by project.
21.21°S · 175.15°W
Questions
Frequently asked questions
What is the best time to visit Tonga?
June is the best month with 77°F highs, 72°F lows, 6.7h of sunshine and 21.0% rainy days. The months of June & July offer comparable conditions.
How many hours of sunshine does Tonga get in June?
Tonga averages 6.7 sunshine hours per day in June. It is the sunniest month with a climate score of 7.7/10.
What is the rainiest month in Tonga?
February is the most unfavourable month with February has the lowest climate score of the year and the lowest climate score of the year.
What are the temperatures at night in Tonga in June?
In June, overnight lows reach 72°F, while afternoon highs average 77°F.
Is Tonga good in winter?
In winter (December-February), Tonga scores 5.7/10 on average — Acceptable conditions for cultural visits.. The best month overall remains June with a score of 7.7/10.
When should you avoid Tonga?
February is the most difficult month to visit Tonga, with February has the lowest climate score of the year. Climate conditions are at their lowest of the year during this period.
Can you swim in Tonga in December?
In December, the sea averages 81°F in Tonga: warm, ideal. Ideal conditions for swimming and snorkeling.
Do you need sun protection in Tonga in December?
The average UV index reaches 9 in December in Tonga (very high), with about 13.3h of daylight. Protection essential.