December weather forecastLynden, WA
December
Weather in December
The first month of the winter, December, is also an icy month in Lynden, Washington, with an average temperature varying between 39.6°F (4.2°C) and 31.6°F (-0.2°C).Temperature
December is the coldest month, with an average high-temperature of 39.6°F (4.2°C) and an average low-temperature of 31.6°F (-0.2°C).Humidity
In December, the average relative humidity is 86%.Rainfall
In Lynden, during December, the rain falls for 19.2 days and regularly aggregates up to 6.85" (174mm) of precipitation. Throughout the year, in Lynden, Washington, there are 188 rainfall days, and 49.88" (1267mm) of precipitation is accumulated.Snowfall
Months with snowfall in Lynden are January through April, November and December. In December, it is snowing for 3 days. Throughout December, 1.89" (48mm) of snow is accumulated. Throughout the year, in Lynden, there are 14.7 snowfall days, and 10.2" (259mm) of snow is accumulated.Daylight
The month with the shortest days in Lynden is December, with an average of 8h and 18min of daylight.On the first day of December, sunrise is at 7:43 am and sunset at 4:15 pm. On the last day of the month, sunrise is at 8:03 am and sunset at 4:22 pm PST.
Sunshine
December has the least sunshine of the year in Lynden, with an average of 3.8h of sunshine.UV index
January, February, October through December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: A maximum UV index of 2 in December translates into the following recommendations:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Take to heart! Snow reflection can almost magnify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Lynden, WA
- Average high temperature in December: 39.6°F
The warmest month (with the highest average high temperature) is August (73.6°F).
The month with the lowest average high temperature is December (39.6°F).
- Average low temperature in December: 31.6°F
The month with the highest average low temperature is August (51.4°F).
The coldest months (with the lowest average low temperature) are February and December (31.6°F).
Average pressure in December
Lynden, WA
- Average pressure in December: 30.08"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The months with the lowest atmospheric pressure are March and August (30"Hg).
Average wind speed in December
Lynden, WA
- Average wind speed in December: 4.5mph
The windiest months (with the highest average wind speed) are January and February (4.7mph).
The calmest month (with the lowest average wind speed) is August (3.2mph).
Average humidity in December
Lynden, WA
- Average humidity in December: 86%
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is July (73%).
Average rainfall in December
Lynden, WA
- Average rainfall in December: 6.85"
The wettest month (with the highest rainfall) is November (7.72").
The driest month (with the least rainfall) is July (0.91").
Average rainfall days in December
Lynden, WA
- Average rainfall days in December: 19.2 days
The month with the highest number of rainy days is March (20.5 days).
The month with the least rainy days is August (7.8 days).
Average snowfall in December
Lynden, WA
- Average snowfall in December: 1.89"
The month with the highest snowfall is February (3.11").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Lynden, WA
- Average snowfall days in December: 3 days
The month with the highest number of snowfall days is February (4.7 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Lynden, WA
- Average daylight in December: 8h and 18min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 18min).
- Average sunshine in December: 3h and 48min
The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is December (Average sunshine: 3h and 48min).
Average sunshine days in December
Lynden, WA
- Average sunshine days in December: 10.3 days
The months with the most sunshine days are July and August (21 days).
The month with the least sunshine days is March (8.4 days).
Average UV index in December
Lynden, WA
- Average UV index in December: 2
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, October, November and December (UV index 2).
Average cloud cover in December
Lynden, WA
- Average cloud cover in December: 59
The month with the most cloud cover is March (Cloud cover 60).
The months with the least cloud cover are July and August (Cloud cover 30).
Average visibility in December
Lynden, WA
- Average visibility in December: 4mi
The months with the highest visibility are April, May, June, July, August, September and October (5mi).
The months with the lowest visibility are January, February, March, November and December (4mi).
