December weather forecast and climate
South Effingham, NH

The first month of the winter, December, is still a cold month in South Effingham, New Hampshire, with temperature in the range of an average low of 21.7°F (-5.7°C) and an average high of 33.1°F (0.6°C).

Temperature

In South Effingham, the average high-temperature in December drops, from a chilly 44.2°F (6.8°C) in November, to a wintry 33.1°F (0.6°C). In December, the average low-temperature is 21.7°F (-5.7°C).

Humidity

The average relative humidity in South Effingham is 81%.

Rainfall

In South Effingham, in December, it is raining for 8.8 days, with typically 3.11" (79mm) of accumulated precipitation. In South Effingham, during the entire year, the rain falls for 138 days and collects up to 30.08" (764mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall in South Effingham. In South Effingham, snow falls for 8.9 days, with typically accumulated 7.2" (183mm) of snow. In South Effingham, during the entire year, snow falls for 48.9 days, and aggregates up to 38.15" (969mm) of snow.

Daylight

With an average of 9h of daylight, December has the shortest days of the year.

Sunshine

The average sunshine in December is 4.7h.

UV index

In December, the average daily maximum UV index is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to the UV radiation for ordinary individuals.
Note: The average daily UV index of 2 transform into the following instructions:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

What is the temperature in December in South Effingham?

In December, the average high-temperature is 33.1°F (0.6°C), and the average low-temperature is 21.7°F (-5.7°C).

What is the average humidity in December in South Effingham?

In South Effingham, New Hampshire, the average relative humidity in December is 81%.

How many days does it rain in December in South Effingham?

In South Effingham, New Hampshire, in December, during 8.8 rainfall days, 3.11" (79mm) of precipitation is typically accumulated.

How many days does it snow in December in South Effingham?

In South Effingham, in December, during 8.9 snowfall days, 7.2" (183mm) of snow is typically accumulated.

What is the month with the shortest days in South Effingham?

The month with the shortest days in South Effingham, New Hampshire, is December, with an average of 9h of daylight.

What is the average length of the day in December in South Effingham?

In South Effingham, New Hampshire, the average length of the day in December is 9h.

How many hours of sunshine does South Effingham have in December?

In South Effingham, the average sunshine in December is 4.7h.

What is the UV index reading in December in South Effingham?

In South Effingham, the average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unprotected exposure to the UV radiation.
Average temperature in December - South Effingham, NH
  • Average high temperature in December: 0.6°C

The warmest month (with the highest average high temperature) is July (25.8°C).
The month with the lowest average high temperature is January (-2.4°C).

  • Average low temperature in December: -5.7°C

The month with the highest average low temperature is July (14.4°C).
The coldest month (with the lowest average low temperature) is January (-10.1°C).

Average pressure in December - South Effingham, NH
  • Average pressure in December: 1016.8mbar

The month with the highest atmospheric pressure is November (1017.9mbar).
The month with the lowest atmospheric pressure is June (1013mbar).

Average wind speed in December - South Effingham, NH
  • Average wind speed in December: 11.1km/h

The windiest month (with the highest average wind speed) is January (12.2km/h).
The calmest months (with the lowest average wind speed) are July and August (7.8km/h).

Average humidity in December - South Effingham, NH
  • Average humidity in December: 81%

Months with the highest relative humidity are January and February (85%).
Months with the lowest relative humidity are April and November (77%).

Average rainfall in December - South Effingham, NH
  • Average rainfall in December: 79mm

The wettest month (with the highest rainfall) is October (84mm).
The driest month (with the least rainfall) is September (39mm).

Average rainfall days in December - South Effingham, NH
  • Average rainfall days in December: 8.8 days

The month with the highest number of rainy days is July (15.1 days).
The month with the least rainy days is February (5.5 days).

Average snowfall in December - South Effingham, NH
  • Average snowfall in December: 183mm

The month with the highest snowfall is February (247mm).
Months with the least snowfall are June, July, August and September (0mm).

Average snowfall days in December - South Effingham, NH
  • Average snowfall days in December: 8.9 days

The month with the highest number of snowfall days is February (11.5 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average daylight in December / Average sunshine in December - South Effingham, NH
  • Average daylight in December: 9h

The month with the longest days is June (Average daylight: 15.4h).
The month with the shortest days is December (Average daylight: 9h).

  • Average sunshine in December: 4.7h

The month with the most sunshine is August (Average sunshine: 10h).
The month with the least sunshine is February (Average sunshine: 4.5h).

Average sunshine days in December - South Effingham, NH
  • Average sunshine days in December: 16 days

The month with the most sunshine days is November (17.9 days).
The month with the least sunshine days is April (13.2 days).

Average UV index in December - South Effingham, NH
  • Average UV index in December: 2

Months with the highest UV index are June, July and August (UV index 5).
The month with the lowest UV index is February (UV index 1).

Average cloud cover in December - South Effingham, NH
  • Average cloud cover in December: 49

The month with the most cloud cover is March (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 36).

Average visibility in December - South Effingham, NH
  • Average visibility in December: 8km

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (8km).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (8km).