December weather forecastLebanon, NH
December
Weather in December
Rounding off the year, December in Lebanon marks the onset of winter. The city witnesses a growing frequency of snowfall, reaching up to 6.3" (160mm). Daylight diminishes further, making way for longer nights and a marked evening chill. Despite the increased snowfall, there is still a fair share of sunshine. As the year ends, Lebanon is cloaked in a stunning winter wonderland, bringing an enchanting end to the year.Temperature
With the onset of December, Lebanon's average high-temperature adjusts, receding from November's wintry 42.3°F (5.7°C) to a freezing cold 30.7°F (-0.7°C). The average nighttime temperature lowers to a still subzero cold 20.8°F (-6.2°C) throughout December.Humidity
The average relative humidity in December in Lebanon is 83%.Rainfall
In Lebanon, in December, during 10.6 rainfall days, 2.24" (57mm) of precipitation is typically accumulated. Throughout the year, there are 156.4 rainfall days, and 26.14" (664mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In December, in Lebanon, it is snowing for 14.1 days. Throughout December, 6.3" (160mm) of snow is accumulated. In Lebanon, during the entire year, snow falls for 74.2 days and aggregates up to 35.67" (906mm) of snow.Daylight
The month with the shortest days is December, with an average of 9h and 0min of daylight.On the first day of December, sunrise is at 7:03 am and sunset at 4:13 pm. On the last day of the month, sunrise is at 7:22 am and sunset at 4:22 pm EST.
Sunshine
The average sunshine in December is 4h.UV index
The months with the lowest UV index are February and December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for average individuals.Note: In December, a daily UV index of 1 turns into the following recommendations:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Lebanon, NH
- Average high temperature in December: 30.7°F
The warmest month (with the highest average high temperature) is July (77.9°F).
The month with the lowest average high temperature is January (25.2°F).
- Average low temperature in December: 20.8°F
The month with the highest average low temperature is July (56.1°F).
The coldest month (with the lowest average low temperature) is January (12.4°F).
Average pressure in December
Lebanon, NH
- Average pressure in December: 30.04"Hg
The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Lebanon, NH
- Average wind speed in December: 6.8mph
The windiest month (with the highest average wind speed) is April (7.4mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).
Average humidity in December
Lebanon, NH
- Average humidity in December: 83%
The months with the highest relative humidity are January and February (86%).
The month with the lowest relative humidity is May (75%).
Average rainfall in December
Lebanon, NH
- Average rainfall in December: 2.24"
The wettest month (with the highest rainfall) is October (2.87").
The driest month (with the least rainfall) is September (1.77").
Average rainfall days in December
Lebanon, NH
- Average rainfall days in December: 10.6 days
The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is January (8.6 days).
Average snowfall in December
Lebanon, NH
- Average snowfall in December: 6.3"
The month with the highest snowfall is February (9.29").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Lebanon, NH
- Average snowfall days in December: 14.1 days
The month with the highest number of snowfall days is January (16.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Lebanon, NH
- Average daylight in December: 9h and 0min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in December: 4h and 0min
The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 3h and 36min).
Average sunshine days in December
Lebanon, NH
- Average sunshine days in December: 11.8 days
The month with the most sunshine days is September (16.3 days).
The month with the least sunshine days is March (9.7 days).
Average UV index in December
Lebanon, NH
- Average UV index in December: 1
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are February and December (UV index 1).
Average cloud cover in December
Lebanon, NH
- Average cloud cover in December: 59
The month with the most cloud cover is February (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 37).
Average visibility in December
Lebanon, NH
- Average visibility in December: 5mi
The months with the highest visibility are April, May, June, July, August, October, November and December (5mi).
The months with the lowest visibility are January, February, March and September (4mi).
