January weather forecast
Lisbon, Portugal

Starting the year off, January in Lisbon, Portugal, typically experiences chillier temperatures, a cloudy sky, and frequent rainfall. This is the time when Lisbon sees the highest rainfall of the year, with an average of 100mm (3.94") recorded. Although the days are shorter during this month, the sea still maintains a slightly mild temperature, which makes walks along the shore fairly pleasant. One can expect crisp mornings and cool evenings, with the conditions overall more suited to indoor activities. The UV index is at its lowest, indicating fewer daylight hours for sightseeing and outdoor activities.

Temperature

Temperature readings in Lisbon reach their annual highs in January, averaging 14.8°C (58.6°F) and a minimum average of 8.3°C (46.9°F).

Rainfall

In January, in Lisbon, the rain falls for 14 days. Throughout January, 100mm (3.94") of precipitation is accumulated. Throughout the year, there are 112 rainfall days, and 774mm (30.47") of precipitation is accumulated.

Sea temperature

In Lisbon, Portugal, the average seawater temperature in January is 15.8°C (60.4°F).
Note: Swimming is not a pleasant activity for most when the water temperature is 15.8°C (60.4°F). As the water temperature drops from 21°C (69.8°F) to 15°C (59°F), breathing becomes more difficult to control.

Daylight

The average length of the day in January in Lisbon is 9h and 49min.
On the first day of the month, sunrise is at 07:54 and sunset at 17:25. On the last day of January, sunrise is at 07:43 and sunset at 17:56 WET.

Sunshine

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

UV index

The months with the lowest UV index are January and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for average individuals.
Note: A daily maximum UV index of 2 in January translates into the following instructions:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.