Tonga weather in January 2026

Expect daytime maximum temperatures of 29°C in Tonga in January and high heat and humidity based on long-term weather averages. There are 18 days with some rainfall and typically 174 mm of rainfall in the month.

  • 29°C maximum daytime temperature in January in Tonga (Nuku'alofa)29
    29°C max day temperature
  • 18 days with some rainfall in January in Tonga (Nuku'alofa)18
    18 days with some rainfall
  • 24°C minimum night-time temperature in January in Tonga (Nuku'alofa)24
    24°C min night temperature
  • 13 hours of daylight per day in January in Tonga (Nuku'alofa)13
    13 hours of daylight per day
  • High heat & humidity in January in Tonga (Nuku'alofa)H
    High heat & humidity
  • 174 mm monthly rainfall in January in Tonga (Nuku'alofa)174
    174 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in January in Tonga (Nuku'alofa)11
    11+ (Extreme) UV index
  • 27°C sea temperature in January in Tonga (Nuku'alofa)27
    27°C sea temperature

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The January weather guide for Tonga (Nuku'alofa) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Top Tonga destinations

Below are average maximum temperatures at popular countries, regions and places in Tonga in January. Select a holiday destination to see more weather parameters.

All Tonga destinations

Metric (°C / mm)  |  Imperial (°F / inches)

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How hot is it in Tonga in January?

Daytime temperatures usually reach 29°C in Nuku'alofa, Tonga in January with high heat and humidity, falling to 24°C at night.

How warm is the sea around Tonga in January?

The average sea temperature around Nuku'alofa, Tonga in January is 27°C.

Does it rain in Tonga in January?

There are usually 18 days with some rain in Nuku'alofa, Tonga in January and the average monthly rainfall is 174mm.

What is the chance of a cyclone in Tonga in January?

On average less than 1 day in January in Nuku'alofa, Tonga is likely to be affected by the passage of one or more tropical storms.

Tonga January sunrise & sunset times

Browse the sunrise and sunset times for Tonga in January 2026. Select a month to view Tonga sunrise and sunset times for the next 12 months. The Tonga sunrise and sunset times shown below are for Nuku'alofa.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Thursday, 1st January 2026 06:02 19:26
Friday, 16th January 2026 06:12 19:28
Saturday, 31st January 2026 06:22 19:26

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