December weather forecast
Roto, Cook Islands

Roto's December climate transitions to a slightly warmer realm, with the high-temperature reaching an average of 28.9°C (84°F). However, the weather remains consistent with the previous months in almost all aspects. Rainfall increases once more to 193mm (7.6"), painting a clear picture of the rainy season's peak. The daily sunshine duration stays consistent with November, getting 8 hours of sunshine. Despite the increase in rainfall, wind conditions remain similar to the previous months, rounding off the year with a familiar tropical climate pattern.

Temperature

The commencement of December in Roto brings an average high-temperature of a still moderately hot 28.9°C (84°F), marking an inconsequential divergence from November. Roto's December nights observe a minor shift from the daytime temperatures, resulting in an average dip to a still moderately hot 27.8°C (82°F).

Heat index

December's mean heat index is estimated at a tropical 33°C (91.4°F). Apply extra caution, heat cramps and heat exhaustion could happen. Heatstroke might occur with long-duration activity.
Metrics for the heat index primarily focus on shaded spots and light wind conditions. The direct sun can potentially cause the heat index to increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', arises from combining readings of air temperature and relative moisture content. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values are extremely significant for babies and toddlers. Young children typically face greater hazards than adults because they do not sweat as much. Their larger skin surface in comparison to their little bodies and the high heat production from their active nature compounds their vulnerability.

Humidity

With an average relative humidity of 74%, December is the least humid month.

Rainfall

In Roto, in December, during 26.6 rainfall days, 193mm (7.6") of precipitation is typically accumulated. In Roto, during the entire year, the rain falls for 301.2 days and collects up to 1868mm (73.54") of precipitation.

Daylight

With an average of 12h and 48min of daylight, December has the longest days of the year in Roto.
On the first day of December, sunrise is at 06:31 and sunset at 19:14. On the last day of the month, sunrise is at 06:44 and sunset at 19:29 -10.

Sunshine

In December, the average sunshine is 8h.

UV index

The months with the highest UV index in Roto, Cook Islands, are January through December, with an average maximum UV index of 7. The months with the lowest UV index are January through December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for the ordinary person.
Note: In December, a daily maximum UV index of 7 leads to the following instructions:
Use protective steps and abide by sun safety guidelines. Safeguarding against skin and eye harm is necessary. During the period from 10 a.m. to 4 p.m., UV radiation is highest. Try to avoid direct sunlight during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.