December weather forecastWhittier, NH
December
Weather in December
December, the first month of the winter in Whittier, is also a subzero cold month, with an average temperature ranging between max 28°F (-2.2°C) and min 17.8°F (-7.9°C).Temperature
December involves a decrease in temperature, down from an icy 38.7°F (3.7°C) in November to a subzero cold 28°F (-2.2°C). Whittier's average low-temperature for the month of December records at a still freezing cold 17.8°F (-7.9°C).Humidity
In December, the average relative humidity in Whittier is 85%.Rainfall
In Whittier, during December, the rain falls for 8.7 days and regularly aggregates up to 1.18" (30mm) of precipitation. In Whittier, during the entire year, the rain falls for 132.9 days and collects up to 13.86" (352mm) of precipitation.Snowfall
January through May, October through December are months with snowfall in Whittier, New Hampshire. In December, in Whittier, it is snowing for 18.4 days. Throughout December, 5.16" (131mm) of snow is accumulated. Throughout the year, in Whittier, New Hampshire, there are 99.7 snowfall days, and 37.05" (941mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 0min of daylight.On the first day of the month, sunrise is at 6:59 am and sunset at 4:08 pm. On the last day of December, sunrise is at 7:19 am and sunset at 4:17 pm EST.
Sunshine
In December, the average sunshine in Whittier is 3.8h.UV index
The months with the lowest UV index in Whittier are January, February and December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for the average person.Note: In December, a daily maximum UV index of 1 leads to the following instructions:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Keep in mind! Snow's reflective quality can nearly double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Whittier, NH
- Average high temperature in December: 28°F
The warmest month (with the highest average high temperature) is July (74.8°F).
The month with the lowest average high temperature is January (22.5°F).
- Average low temperature in December: 17.8°F
The month with the highest average low temperature is July (55.8°F).
The coldest month (with the lowest average low temperature) is January (9.5°F).
Average pressure in December
Whittier, NH
- Average pressure in December: 30.03"Hg
The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in December
Whittier, NH
- Average wind speed in December: 6.8mph
The windiest month (with the highest average wind speed) is January (7.3mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).
Average humidity in December
Whittier, NH
- Average humidity in December: 85%
The months with the highest relative humidity are January and February (89%).
The month with the lowest relative humidity is May (78%).
Average rainfall in December
Whittier, NH
- Average rainfall in December: 1.18"
The wettest month (with the highest rainfall) is April (1.57").
The driest month (with the least rainfall) is September (0.71").
Average rainfall days in December
Whittier, NH
- Average rainfall days in December: 8.7 days
The month with the highest number of rainy days is July (16.6 days).
The month with the least rainy days is February (6.6 days).
Average snowfall in December
Whittier, NH
- Average snowfall in December: 5.16"
The months with the highest snowfall are January and February (6.1").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Whittier, NH
- Average snowfall days in December: 18.4 days
The month with the highest number of snowfall days is December (18.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Whittier, 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: 3h and 48min
The month with the most sunshine is August (Average sunshine: 9h and 30min).
The month with the least sunshine is February (Average sunshine: 3h and 36min).
Average sunshine days in December
Whittier, NH
- Average sunshine days in December: 12.5 days
The month with the most sunshine days is September (16.8 days).
The month with the least sunshine days is February (10.7 days).
Average UV index in December
Whittier, NH
- Average UV index in December: 1
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February and December (UV index 1).
Average cloud cover in December
Whittier, NH
- Average cloud cover in December: 62
The month with the most cloud cover is February (Cloud cover 65).
The month with the least cloud cover is August (Cloud cover 42).
Average visibility in December
Whittier, NH
- Average visibility in December: 4mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (4mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (4mi).
