December weather forecastLester, WA
December
Weather in December
December, the first month of the winter in Lester, is still a freezing cold month, with an average temperature varying between 30.2°F (-1°C) and 20.3°F (-6.5°C).Temperature
December, characterized by an average high temperature of 30.2°F (-1°C) and a low temperature of 20.3°F (-6.5°C), is generally the coldest month.Humidity
In December, the average relative humidity is 92%.Rainfall
In December, the rain falls for 8.1 days. Throughout December, 4.02" (102mm) of precipitation is accumulated. In Lester, during the entire year, the rain falls for 127.9 days and collects up to 28.58" (726mm) of precipitation.Snowfall
Months with snowfall are January through June, September through December. In December, it is snowing for 22.3 days. Throughout December, 27.24" (692mm) of snow is accumulated. In Lester, during the entire year, snow falls for 135.3 days and aggregates up to 134.33" (3412mm) of snow.Daylight
With an average of 8h and 36min of daylight, December has the shortest days of the year.On the first day of December, sunrise is at 7:32 am and sunset at 4:17 pm. On the last day of the month, sunrise is at 7:52 am and sunset at 4:26 pm PST.
Sunshine
In December, the average sunshine is 3.1h.UV index
January, February, November and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for ordinary individuals.Note: An average maximum UV index of 1 in December leads to these recommendations:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Be on the lookout! Nearly twofold UV radiation from the Sun can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Lester, WA
- Average high temperature in December: 30.2°F
The warmest month (with the highest average high temperature) is August (71.2°F).
The month with the lowest average high temperature is December (30.2°F).
- Average low temperature in December: 20.3°F
The month with the highest average low temperature is August (45°F).
The coldest month (with the lowest average low temperature) is December (20.3°F).
Average pressure in December
Lester, WA
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is August (29.97"Hg).
Average wind speed in December
Lester, WA
- Average wind speed in December: 4.5mph
The windiest month (with the highest average wind speed) is January (5mph).
The calmest month (with the lowest average wind speed) is September (3.9mph).
Average humidity in December
Lester, WA
- Average humidity in December: 92%
The months with the highest relative humidity are January and February (93%).
The month with the lowest relative humidity is July (69%).
Average rainfall in December
Lester, WA
- Average rainfall in December: 4.02"
The wettest month (with the highest rainfall) is January (4.21").
The driest month (with the least rainfall) is July (0.51").
Average rainfall days in December
Lester, WA
- Average rainfall days in December: 8.1 days
The month with the highest number of rainy days is May (15.7 days).
The month with the least rainy days is January (6.8 days).
Average snowfall in December
Lester, WA
- Average snowfall in December: 27.24"
The month with the highest snowfall is January (27.72").
The months with the least snowfall are July and August (0").
Average snowfall days in December
Lester, WA
- Average snowfall days in December: 22.3 days
The month with the highest number of snowfall days is December (22.3 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in December /
Average sunshine in December
Lester, WA
- Average daylight in December: 8h and 36min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in December: 3h and 6min
The month with the most sunshine is August (Average sunshine: 10h and 54min).
The months with the least sunshine are January and February (Average sunshine: 3h and 0min).
Average sunshine days in December
Lester, WA
- Average sunshine days in December: 8.5 days
The month with the most sunshine days is August (20.2 days).
The month with the least sunshine days is February (6 days).
Average UV index in December
Lester, WA
- Average UV index in December: 1
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in December
Lester, WA
- Average cloud cover in December: 70
The month with the most cloud cover is February (Cloud cover 72).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in December
Lester, WA
- Average visibility in December: 3mi
The months with the highest visibility are June, July and August (5mi).
The months with the lowest visibility are January, February, March and December (3mi).
