January weather forecast
Puerto Rico, Spain

The opening of the year brings to Puerto Rico a balance of mild and wet conditions, with the chill of winter slightly noticeable. Rainfall intensifies this month, culminating in an average of 45mm (1.77") over three days precedently noted. A quick glimpse outside would reveal a considerable amount of daylight, for approximately 10.6 hours. The margins between warmth and cold taper, with mornings a hint cooler than afternoons. Weather deviations from these conditions remain infrequent, honing a consistent weather pattern.

Temperature

January and February are the coldest months in Puerto Rico, with an average high-temperature of 18°C (64.4°F).

Rainfall

In Puerto Rico, Spain, during January, the rain falls for 3 days and regularly aggregates up to 45mm (1.77") of precipitation. Throughout the year, in Puerto Rico, Spain, there are 21 rainfall days, and 291mm (11.46") of precipitation is accumulated.

Sea temperature

In January, the average sea temperature is 20.2°C (68.4°F).
Note: Most people find swimming in 20.2°C (68.4°F) unenjoyable. As the water temperature falls from 21°C (69.8°F) to 15°C (59°F), controlling one's breathing becomes harder.

Daylight

In January, the average length of the day in Puerto Rico is 10h and 37min.
On the first day of the month, sunrise is at 07:53 and sunset at 18:18. On the last day of January, sunrise is at 07:50 and sunset at 18:42 WET.

Sunshine

January, November and December, with an average of 6h of sunshine, are months with the least sunshine in Puerto Rico.

UV index

January and December, with an average maximum UV index of 4, are months with the lowest UV index. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the ordinary person.
Note: The maximum daily UV index of 4 in January converts into the following recommendations:
Preventative actions are necessary - Recommendations to ward off sunburn are given. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.