Salem
New Hampshire, USA
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Salem, NH

Ocean temperature

In Salem, New Hampshire, in December, the average water temperature is 46°F (7.8°C).
Note: Swimming in 46°F (7.8°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

Daylight

The month with the shortest days is December, with an average of 9.1h of daylight.

How cold is the water in December in Salem?

In Salem, New Hampshire, the average seawater temperature in December is 46°F (7.8°C). Swimming in 46°F (7.8°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

What is the month with the shortest days in Salem?

The month with the shortest days in Salem is December, with an average of 9.1h of daylight.

How many hours of daylight does Salem have in December?

The average length of the day in December in Salem, New Hampshire, is 9.1h.
Average sea temperature in December - Salem, NH
  • Average sea temperature in December: 7.8°C

The best month for swimming (with the highest average sea temperature) is August (19.1°C).
The coldest month (with the lowest average sea temperature) is March (3.8°C).

Average daylight in December - Salem, NH
  • Average daylight in December: 9.1h

The month with the longest days is June (Average daylight: 15.3h).
The month with shortest days is December (Average daylight: 9.1h).