December weather forecastMonitor, WA
December
Weather in December
The first month of the winter, December, is also a wintry month in Monitor, Washington, with an average temperature varying between 20.3°F (-6.5°C) and 32.5°F (0.3°C).Temperature
The lowest temperatures are recorded in December, with averages reaching a high of 32.5°F (0.3°C) and a low of 20.3°F (-6.5°C).Humidity
The average relative humidity in December in Monitor is 88%.Rainfall
In December, the rain falls for 10.2 days. Throughout December, 1.77" (45mm) of precipitation is accumulated. In Monitor, Washington, during the entire year, the rain falls for 113.5 days and collects up to 12.32" (313mm) of precipitation.Snowfall
Months with snowfall in Monitor are January through April, November and December. The month with the most snowfall is December, when snow falls for 7.3 days and typically aggregates up to 4.65" (118mm) of snow.Daylight
December has the shortest days of the year in Monitor, with an average of 8h and 30min of daylight.On the first day of the month, sunrise is at 7:29 am and sunset at 4:12 pm. On the last day of December, sunrise is at 7:49 am and sunset at 4:20 pm PST.
Sunshine
In December, the average sunshine in Monitor, Washington, is 4.9h.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Monitor. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: The average daily UV index of 2 in December transforms into the following instructions:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Outfit yourself in sun-safe attire, like long sleeves, pants, a hat, and UV-blocking sunglasses. Remember to consider! The UV radiation from the Sun can be intensified nearly twice by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Monitor, WA
- Average high temperature in December: 32.5°F
The warmest months (with the highest average high temperature) are July and August (82.2°F).
The month with the lowest average high temperature is December (32.5°F).
- Average low temperature in December: 20.3°F
The month with the highest average low temperature is August (52.2°F).
The coldest month (with the lowest average low temperature) is December (20.3°F).
Average pressure in December
Monitor, WA
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is August (29.94"Hg).
Average wind speed in December
Monitor, WA
- Average wind speed in December: 3.4mph
The windiest months (with the highest average wind speed) are June and July (5.8mph).
The calmest month (with the lowest average wind speed) is December (3.4mph).
Average humidity in December
Monitor, WA
- Average humidity in December: 88%
The month with the highest relative humidity is January (90%).
The months with the lowest relative humidity are July and August (49%).
Average rainfall in December
Monitor, WA
- Average rainfall in December: 1.77"
The wettest month (with the highest rainfall) is January (2.05").
The driest month (with the least rainfall) is July (0.2").
Average rainfall days in December
Monitor, WA
- Average rainfall days in December: 10.2 days
The month with the highest number of rainy days is March (15 days).
The month with the least rainy days is August (3.3 days).
Average snowfall in December
Monitor, WA
- Average snowfall in December: 4.65"
The month with the highest snowfall is December (4.65").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Monitor, WA
- Average snowfall days in December: 7.3 days
The month with the highest number of snowfall days is December (7.3 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
Monitor, WA
- Average daylight in December: 8h and 30min
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 30min).
- Average sunshine in December: 4h and 54min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days in December
Monitor, WA
- Average sunshine days in December: 15.5 days
The month with the most sunshine days is August (26.1 days).
The month with the least sunshine days is March (12.4 days).
Average UV index in December
Monitor, WA
- Average UV index in December: 2
The month with the highest UV index is July (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
Monitor, WA
- Average cloud cover in December: 48
The month with the most cloud cover is January (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 12).
Average visibility in December
Monitor, WA
- Average visibility in December: 4mi
The months with the highest visibility are April, May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February and December (4mi).
