January weather forecastNuku'alofa, Tonga

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's weather, upon January's arrival, documents an average high-temperature of a still moderately hot 29.4°C (84.9°F), nearly identical to the prior month. In the month of January, Nuku'alofa experiences an average low-temperature of 23.4°C (74.1°F).

Heat index

In January, the average heat index is appraised at a torrid 35°C (95°F). Undertake additional precautions, heat cramps and heat exhaustion could happen. Heatstroke could occur from sustained activity.
Research indicates the heat index considers values in shaded locales and with light winds. When under direct sunshine, the heat index may be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', determines the feeling of heat when you account for the relative humidity. Elements such as metabolic variations, pregnancy, and physical exertion can influence one's weather perception. One must note that being under the direct sun can escalate the heat's effects, with the heat index possibly rising by 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for children. Young ones are generally more prone to risk than adults due to their reduced ability to sweat. Their large skin surface area relative to their diminutive bodies and elevated heat production from their activities further enhance this risk.
When the body gets too warm, it perspires, leading to sweat evaporation which cools it down. Under conditions of high temperature and humidity (enhanced heat index), sweat production is compromised, exacerbating the sensation of warmth. When heat surpasses the body's release mechanisms, dehydration and overheating risks become pronounced.

Humidity

In Nuku'alofa, Tonga, the average relative humidity in January is 77%.

Rainfall

In January, the rain falls for 17 days. Throughout January, 174mm (6.85") of precipitation is accumulated. Throughout the year, there are 180 rainfall days, and 1721mm (67.76") of precipitation is accumulated.

Sea temperature

In January, the average sea temperature is 27.7°C (81.9°F).
Note: For activities such as swimming and diving, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as particularly pleasant and satisfying for prolonged periods without feeling uneasy.

Daylight

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

UV index

January through March, November and December, with an average maximum UV index of 12, are months with the highest UV index. A UV Index of 11, and more, symbolizes an extreme health hazard from exposure to the Sun's UV rays for the average person.
Note: In January, the maximum UV index of 12 suggests these recommendations:
Employ every precaution of importance, unprotected skin and eyes could burn within moments. The time between 10 a.m. and 4 p.m. is when UV radiation is at its peak. Limit exposure to direct sunlight during these hours. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Regardless of cloud cover, it's recommended to apply generously and reapply often a sunscreen with an SPF of at least 30, especially after swimming or any outdoor activity. Be mindful! Sand and water reflections can up the Sun's UV exposure.