December weather forecastLondonderry, NH
December
Weather in December
December ushers in Londonderry's winter, transforming the cityscape into a snowy wonderland. The cold clings tightly, and daylight becomes a precious commodity. Rainfall sees a marginal rise, but snowfall typically steals the spotlight. December is known for its cold temperatures oscillating from 25.3ºF to 36.3ºF. It's a call to ready oneself for the full force of winter, marked by the outset of January and another year of diverse weather patterns.Temperature
With the beginning of December, the average high-temperature in Londonderry shows a decrease, transitioning from a chilly 46.6°F (8.1°C) in November to a cold 36.3°F (2.4°C). Londonderry's nighttime temperature in December drops to an average of 25.3°F (-3.7°C).Humidity
In Londonderry, the average relative humidity in December is 79%.Rainfall
In Londonderry, in December, during 6.3 rainfall days, 1.1" (28mm) of precipitation is typically accumulated. In Londonderry, during the entire year, the rain falls for 104.4 days and collects up to 12.95" (329mm) of precipitation.Snowfall
Months with snowfall in Londonderry are January through May, October through December. December is the month with the most snowfall in Londonderry. Snow falls for 4 days and accumulates 2.99" (76mm) of snow.Daylight
December has the shortest days of the year in Londonderry, with an average of 9h and 6min of daylight.On the first day of December, sunrise is at 6:57 am and sunset at 4:12 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 4:21 pm EST.
Sunshine
In Londonderry, the average sunshine in December is 4.8h.UV index
The months with the lowest UV index in Londonderry are January through March, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for the average person.Note: In December, the maximum UV index of 2 transforms into these recommendations:
Most individuals face no major issues with lengthy exposure to the sun, but children, infants, and individuals with fair skin always require protection. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Londonderry, NH
- Average high temperature in December: 36.3°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (30.6°F).
- Average low temperature in December: 25.3°F
The month with the highest average low temperature is July (61°F).
The coldest month (with the lowest average low temperature) is January (18°F).
Average pressure in December
Londonderry, NH
- Average pressure in December: 30.03"Hg
The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Londonderry, NH
- Average wind speed in December: 7.8mph
The windiest month (with the highest average wind speed) is January (8.3mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity in December
Londonderry, NH
- Average humidity in December: 79%
The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is April (72%).
Average rainfall in December
Londonderry, NH
- Average rainfall in December: 1.1"
The wettest month (with the highest rainfall) is October (1.38").
The driest month (with the least rainfall) is January (0.75").
Average rainfall days in December
Londonderry, NH
- Average rainfall days in December: 6.3 days
The month with the highest number of rainy days is June (12.1 days).
The month with the least rainy days is January (4.1 days).
Average snowfall in December
Londonderry, NH
- Average snowfall in December: 2.99"
The month with the highest snowfall is December (2.99").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Londonderry, NH
- Average snowfall days in December: 4 days
The month with the highest number of snowfall days is January (7.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Londonderry, NH
- Average daylight in December: 9h and 6min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 4h and 48min
The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in December
Londonderry, NH
- Average sunshine days in December: 21.3 days
The months with the most sunshine days are January and December (21.3 days).
The month with the least sunshine days is June (16.7 days).
Average UV index in December
Londonderry, NH
- Average UV index in December: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in December
Londonderry, NH
- Average cloud cover in December: 47
The month with the most cloud cover is March (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in December
Londonderry, NH
- Average visibility in December: 6mi
The months with the highest visibility are January, April, November and December (6mi).
The months with the lowest visibility are February, March, May, June, July, August, September and October (5mi).
