January weather forecast
Nuku'alofa, Tonga

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The Rugged scenic shores of Nuku
The Rugged scenic shores of Nuku'alofa in Tonga, with a beautiful clear waterfront

Weather in January

January invites locals and visitors alike to enjoy its warm climate in Nuku'alofa, Tonga. The temperature often fluctuates between a high of 29.4°C (84.9°F) and a low of 23.4°C (74.1°F). The shift to February bears minimal change in temperature but more distinct alterations could be felt in terms of precipitation. January stands out with the most sum of sunshine hours. Humidity and UV index also remain relatively high, necessitating ample hydration and sun protection.

Temperature

Nuku'alofa ushers in January with an average high-temperature of a still moderately hot 29.4°C (84.9°F), showing a close resemblance to the previous month. Throughout the month of January, Nuku'alofa witnesses an average temperature of 23.4°C (74.1°F).

Heat index

The heat index for January is calculated to be a fiery hot 35°C (95°F). Greater safety measures are needed, risk of heat exhaustion and heat cramps is high. Continuous activity might trigger heatstroke.
Evaluating the heat index requires understanding its values in the shade and with gentle winds. With direct sunlight, the heat index could increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', binds temperature metrics with humidity values to give a sense of the actual warmth. Additional elements encompassing metabolic differences, the degree of physical activity, and attire can impact the individual's perception of temperature. Realize that direct exposure to sunlight can augment the felt heat, leading to a potential increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Youngsters often neglect the necessity for rest and hydration. Thirst is a sign of advancing dehydration - thus the importance of maintaining hydration, specifically during long-lasting physical activities.
The primary way humans combat excessive warmth is by perspiring, letting sweat evaporate and cool the body. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. Temperature imbalances caused by excessive heat retention can trigger heat-related maladies.

Humidity

The average relative humidity in January in Nuku'alofa is 77%.

Rainfall

In Nuku'alofa, in January, during 17 rainfall days, 174mm (6.85") of precipitation is typically accumulated. Throughout the year, in Nuku'alofa, there are 180 rainfall days, and 1721mm (67.76") of precipitation is accumulated.

Sea temperature

In Nuku'alofa, in January, the average water temperature is 27.7°C (81.9°F).
Note: Between 25°C (77°F) and 29°C (84.2°F), water temperature is typically considered very warm and pleasurable by everyone. Water activities at these temperatures are enjoyable for extended periods without discomfort.

Daylight

In January, the average length of the day in Nuku'alofa, Tonga, is 13h and 14min.
On the first day of the month, sunrise is at 06:02 and sunset at 19:26. On the last day of January, sunrise is at 06:22 and sunset at 19:25 +13.

Sunshine

January and March, with an average of 18h of sunshine, are months with the most sunshine in Nuku'alofa.

UV index

The months with the highest UV index are January through March, November and December, with an average maximum UV index of 12. A UV Index estimate of 11, and higher, represents an ultimate health vulnerability from exposure to the Sun's UV radiation for average individuals.
Note: The maximum UV index of 12 during January leads to these instructions:
Take all required precautions, as unprotected skin and eyes can burn in minutes. Stay in the shade and limit direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is particularly strong. Remember, however, that shade structures may not provide complete protection. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. After a swim or an outdoor workout, generously apply and reapply a broad-spectrum SPF 30+ sunscreen. Stay aware! UV radiation is magnified when reflecting off sand and water.
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Frequently asked questions

How hot is January in Nuku'alofa?

The high-temperature, in January, in Nuku'alofa, records 29.4°C (84.9°F), while the low-temperature is 23.4°C (74.1°F). The average heat index (a.k.a. 'real feel', 'feels like'), which factors the actual air temperature with the relative humidity, in January is calculated to be 35°C (95°F).

What is the average humidity in January in Nuku'alofa?

In January, the average relative humidity is 77%.

How many days does it rain in January in Nuku'alofa?

In Nuku'alofa, during January, the rain falls for 17 days and regularly aggregates up to 174mm (6.85") of precipitation.

How warm is the water in January in Nuku'alofa?

In Nuku'alofa, in January, the average water temperature is 27.7°C (81.9°F). For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

How many hours of daylight does Nuku'alofa have in January?

The average day length in January is 13h and 14min.

When is the sunrise / sunset in January in Nuku'alofa?

In January, on the first day of the month, sunrise is at 06:02 and sunset at 19:26. On the last day of the month, in Nuku'alofa, sunrise is at 06:22 and sunset at 19:25 +13.

What are the months with the most sunshine in Nuku'alofa?

The months with the most sunshine are January and March, with an average of 18h of sunshine.

How many hours of sunshine does Nuku'alofa have in January?

In January, the average sunshine duration in Nuku'alofa is 18h.

What is the month with the highest UV index in Nuku'alofa?

January through March, November and December, with an average maximum UV index of 12, are months with the highest UV index in Nuku'alofa.

What is the UV index intensity in January in Nuku'alofa?

In Nuku'alofa, the average daily maximum UV index in January is 12. A UV Index of 11, and more, symbolizes an ultimate hazard to health from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average UV index

Average temperature in January
Nuku'alofa, Tonga

Average temperature in January - Nuku
  • Average high temperature in January: 29.4°C

The warmest month (with the highest average high temperature) is February (29.9°C).
The month with the lowest average high temperature is August (24.8°C).

  • Average low temperature in January: 23.4°C

The month with the highest average low temperature is February (23.7°C).
The coldest month (with the lowest average low temperature) is July (18.1°C).

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Average humidity in January
Nuku'alofa, Tonga

Average humidity in January - Nuku
  • Average humidity in January: 77%

The month with the highest relative humidity is March (79%).
The month with the lowest relative humidity is November (73%).

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Average rainfall in January
Nuku'alofa, Tonga

Average rainfall in January - Nuku
  • Average rainfall in January: 174mm

The wettest month (with the highest rainfall) is February (210mm).
The driest months (with the least rainfall) are June and July (95mm).

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Average rainfall days in January
Nuku'alofa, Tonga

Average rainfall days in January - Nuku
  • Average rainfall days in January: 17 days

The months with the highest number of rainy days are February and March (19 days).
The month with the least rainy days is October (11 days).

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Average sea temperature in January
Nuku'alofa, Tonga

Average sea temperature in January - Nuku
  • Average sea temperature in January: 27.7°C

The best month for swimming (with the highest average sea temperature) is March (28.1°C).
The coldest months (with the lowest average sea temperature) are August and September (23.8°C).

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Average daylight in January /
Average sunshine in January
Nuku'alofa, Tonga

Average daylight in January / Average sunshine in January - Nuku
  • Average daylight in January: 13h and 1min

The month with the longest days is December (Average daylight: 13h and 24min).
The month with the shortest days is June (Average daylight: 10h and 54min).

  • Average sunshine in January: 18h

The months with the most sunshine are January and March (Average sunshine: 18h).
The month with the least sunshine is August (Average sunshine: 3h).

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Average UV index in January
Nuku'alofa, Tonga

Average UV index in January - Nuku
  • Average UV index in January: 12

The months with the highest UV index are January, February, March, November and December (UV index 12).
The months with the lowest UV index are June and July (UV index 6).

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Nuku'alofa, Tonga

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