January weather forecast
Porto Santo Island, Portugal

The year kicks off in Porto Santo Island with consistent and mild weather, maintaining a relatively harmonious balance between the warm sea and cooler land temperatures. Despite being one of the colder months, the subtropical maritime climate is vastly different from harsh winter conditions found in more northern countries. There's ample sunshine, boasting longer daylight hours compared to the later autumn months. January does, however, have a higher propensity for rainfall with an average of 67mm (2.64") over 13 days, and relative humidity at 78%. Ample moisture and occasional rain showers bring a unique freshness to the island's landscape and contribute to its rich, green vegetation.

Temperature

During the coldest month, January, temperatures average a high of 18°C (64.4°F) and a low of 13.8°C (56.8°F).

Humidity

The months with the highest humidity in Porto Santo Island are January and February, with an average relative humidity of 78%.

Rainfall

The month with the most rainfall in Porto Santo Island is January, when the rain falls for 13 days and typically aggregates up to 67mm (2.64") of precipitation.

Sea temperature

In January, the average sea temperature in Porto Santo Island is 18.6°C (65.5°F).
Note: Swimming in water at 18.6°C (65.5°F) is not a pleasing experience for the majority. As the temperature descends from 21°C (69.8°F) to 15°C (59°F), controlling breathing becomes increasingly hard.

Daylight

In Porto Santo Island, the average length of the day in January is 10h and 16min.
On the first day of January in Porto Santo Island, sunrise is at 08:08 and sunset at 18:09. On the last day of the month, sunrise is at 08:01 and sunset at 18:35 WET.

Sunshine

January, February, November and December, with an average of 5h of sunshine, are months with the least sunshine.

UV index

January and December, with an average maximum UV index of 3, are months with the lowest UV index. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for average individuals.
Note: An average UV index of 3 in January transforms into this advice:
Undertake protective steps - Obligation to safeguard skin and eyes from harm is in place. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.