Nuku‘alofa Temperature by Month

Nuku‘alofa, Tongatapu Island, Tonga has a consistently comfortable climate year-round, with daytime highs averaging 26°C (79°F). Below you'll find a full monthly breakdown and a comparison with cities worldwide.

Year-round, Nuku‘alofa experiences a consistently comfortable climate. Maximum daytime temperatures range from a comfortable 28°C (82°F) in February to a comfortable 24°C (75°F) in the coolest month, August. Nighttime temperatures range from 26°C (79°F) in February to 22°C (72°F) in August.

The chart below illustrates the average maximum day and minimum night temperatures in Nuku‘alofa by month:

Low temperatures are most often recorded between 4 AM and 6 AM, while highs typically occur around 3 PM.

The chart below shows the average temperature throughout the year:

Nuku‘alofa's average annual maximum temperature is 26°C (79°F). To put that in context, here's how it compares to a few well-known destinations:

Lisbon, Portugal averages 21°C (70°F) annually, warm summers, mild winters, and rain mainly in the cooler months.

On the cooler end, Oslo, Norway averages just 10°C (50°F) annually, with pleasant summers but long, cold winters.

San Francisco, USA averages 19°C (66°F) annually, but with little seasonal variation, summers are often cool and foggy, winters mild.

Perth, Australia averages 25°C (77°F) annually, with a classic Mediterranean climate, hot dry summers and mild wet winters.

Temperature alone doesn't tell the whole story, humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.

In Nuku‘alofa, August is the coolest month, with average highs of 24°C (75°F) and humidity around 75%, considered high. In February, the warmest month, temperatures average 28°C (82°F) with 78% humidity, conditions that feel high. For a full picture, see our humidity page.

Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.

The readings come from a range of sources, land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.

Seasonal temperature shifts influence more than just how warm it feels, they also drive changes in rainfall, cloud cover, and wind patterns throughout the year.

Warmer air holds more moisture, which tends to mean heavier or more frequent rain during the warmer months. When temperatures drop in winter, any precipitation that does fall is more likely to come as snow or sleet, though in Nuku‘alofa this rarely lasts long on the ground.

For more on Nuku‘alofa's weather, including monthly rainfall, sunshine hours, and humidity, visit our Nuku‘alofa climate page.