December weather forecast
Salem, MA

December is right back in the heart of winter with temperatures ranging from 23°F (-5°C) to 39°F (3.9°C) in Salem. With daylight hours shrinking to the shortest of the year and an average UV index of 1, outdoor activities are often limited. The city, already renowned for its historic charm, dons a magical look during the holiday season. The sea temperature drops to 45°F (7.2°C), preventing water-based activities. With the highest rainfall measure of the year at 4.1" (104mm), December is a time to enjoy indoor festivities.

Temperature

December's arrival corresponds with a decrease in average high-temperatures, from November's fresh 51.8°F (11°C) to a wintry 39.2°F (4°C). Salem, in December, witnesses an average low-temperature of 23°F (-5°C).

Rainfall

In Salem, in December, during 12 rainfall days, 4.13" (105mm) of precipitation is typically accumulated. Throughout the year, there are 124 rainfall days, and 43.03" (1093mm) of precipitation is accumulated.

Ocean temperature

In December, the average ocean temperature in Salem is 44.6°F (7°C).
Note: With the appropriate swimsuit, one can swim in 44.6°F (7°C) even if temperatures dip below 50°F (10°C); otherwise, be ready for cold shock and breath issues. A fleeting swim around 55.4°F (13°C) is distressing.

Daylight

December has the shortest days of the year in Salem, Massachusetts, with an average of 9h and 6min of daylight.
On the first day of the month, sunrise is at 6:54 am and sunset at 4:11 pm. On the last day of December, sunrise is at 7:13 am and sunset at 4:20 pm EST.

Sunshine

January, 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 1, are months with the lowest UV index in Salem. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for the average person.
Note: In December, a daily UV index of 1 turns into the following recommendations:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.