December weather forecastSeabrook, NH
December
Weather in December
December marks the return of Winter in Seabrook, New Hampshire, attracting fans of snow sports and cosy indoor activities alike. The holiday spirit is amplified by the white blanket of snow that covers the city. With both daylight and sunshine hours at their lowest, December calls for warmth and candles. Amid the festive cheer, frequent snow showers are observed with an average of 3.43" (87mm) of snowfall recorded. As the wind gusts reach up to 17.8mph (28.6km/h), anticipate a White Christmas filled with joy, warmth, and merriment.Temperature
A moderate decline in the average high-temperature is seen during December, decreasing from a frosty 47.8°F (8.8°C) in November to an icy 38.3°F (3.5°C). Seabrook encounters an average low-temperature of 28.9°F (-1.7°C) during December nights.Humidity
The average relative humidity in December is 77%.Rainfall
The wettest months are October and December, with an average 2.83" (72mm) of rainfall.Snowfall
Months with snowfall are January through April, October through December. In December, in Seabrook, it is snowing for 6.5 days. Throughout December, 3.43" (87mm) of snow is accumulated. In Seabrook, during the entire year, snow falls for 33 days and aggregates up to 15.24" (387mm) of snow.Daylight
With an average of 9h and 6min of daylight, December has the shortest days of the year in Seabrook.On the first day of the month, sunrise is at 6:55 am and sunset at 4:10 pm. On the last day of December, sunrise is at 7:14 am and sunset at 4:19 pm EST.
Sunshine
February and December, with an average of 4.8h of sunshine, are months with the least sunshine in Seabrook.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Seabrook. A UV Index reading of 2, and below, represents a low threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A maximum UV index of 2 in December translates into the following recommendations:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. The solar radiation around mid-day is intense; avoid the Sun and stay safe. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. 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
Seabrook, NH
- Average high temperature in December: 38.3°F
The warmest month (with the highest average high temperature) is July (76.5°F).
The month with the lowest average high temperature is January (32.5°F).
- Average low temperature in December: 28.9°F
The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (21.9°F).
Average pressure in December
Seabrook, 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 (29.92"Hg).
Average wind speed in December
Seabrook, NH
- Average wind speed in December: 11.3mph
The windiest month (with the highest average wind speed) is January (12.1mph).
The calmest months (with the lowest average wind speed) are July and August (6.9mph).
Average humidity in December
Seabrook, NH
- Average humidity in December: 77%
The months with the highest relative humidity are June and July (79%).
The month with the lowest relative humidity is November (74%).
Average rainfall in December
Seabrook, NH
- Average rainfall in December: 2.83"
The wettest months (with the highest rainfall) are October and December (2.83").
The driest month (with the least rainfall) is September (1.54").
Average rainfall days in December
Seabrook, NH
- Average rainfall days in December: 11.4 days
The month with the highest number of rainy days is May (15.4 days).
The month with the least rainy days is January (7.7 days).
Average snowfall in December
Seabrook, NH
- Average snowfall in December: 3.43"
The month with the highest snowfall is February (4.02").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in December
Seabrook, NH
- Average snowfall days in December: 6.5 days
The months with the highest number of snowfall days are January and February (8.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in December /
Average sunshine in December
Seabrook, 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 42min).
The months with the least sunshine are February and December (Average sunshine: 4h and 48min).
Average sunshine days in December
Seabrook, NH
- Average sunshine days in December: 14.7 days
The month with the most sunshine days is November (16.9 days).
The month with the least sunshine days is April (13.1 days).
Average UV index in December
Seabrook, NH
- Average UV index in December: 2
The months with the highest UV index are 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
Seabrook, NH
- Average cloud cover in December: 48
The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in December
Seabrook, NH
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
