December weather forecastMonroe, WA
December
Weather in December
December, the first month of the winter in Monroe, is still a cold month, with an average temperature fluctuating between 31.8°F (-0.1°C) and 41.2°F (5.1°C).Temperature
The lowest temperatures are recorded in December, with averages reaching a high of 41.2°F (5.1°C) and a low of 31.8°F (-0.1°C).Humidity
The months with the highest humidity are January, February and December, with an average relative humidity of 86%.Rainfall
The month with the most rainfall is December, when the rain falls for 12.4 days and typically aggregates up to 1.85" (47mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. In Monroe, in December, during 1.1 snowfall days, 0.2" (5mm) of snow is typically accumulated. In Monroe, during the entire year, snow falls for 7 days and aggregates up to 2.64" (67mm) of snow.Daylight
With an average of 8h and 30min of daylight, December has the shortest days of the year.On the first day of the month, sunrise is at 7:36 am and sunset at 4:17 pm. On the last day of December, sunrise is at 7:56 am and sunset at 4:25 pm PST.
Sunshine
The month with the least sunshine is December, with an average of 3.8h of sunshine.UV index
January, February, November and 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 low threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum daily UV index of 2 in December converts into the following recommendations:
Most individuals face no significant issues with extended sun exposure, but it is always essential to protect children, babies, and those with sensitive skin. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Monroe, WA
- Average high temperature in December: 41.2°F
The warmest month (with the highest average high temperature) is August (75.6°F).
The month with the lowest average high temperature is December (41.2°F).
- Average low temperature in December: 31.8°F
The month with the highest average low temperature is August (49.8°F).
The coldest month (with the lowest average low temperature) is December (31.8°F).
Average pressure in December
Monroe, WA
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).
Average wind speed in December
Monroe, WA
- Average wind speed in December: 4.5mph
The windiest month (with the highest average wind speed) is January (4.9mph).
The calmest month (with the lowest average wind speed) is August (3.3mph).
Average humidity in December
Monroe, WA
- Average humidity in December: 86%
The months with the highest relative humidity are January, February and December (86%).
The month with the lowest relative humidity is July (71%).
Average rainfall in December
Monroe, WA
- Average rainfall in December: 1.85"
The wettest month (with the highest rainfall) is December (1.85").
The driest month (with the least rainfall) is August (0.2").
Average rainfall days in December
Monroe, WA
- Average rainfall days in December: 12.4 days
The month with the highest number of rainy days is March (13.6 days).
The month with the least rainy days is August (4 days).
Average snowfall in December
Monroe, WA
- Average snowfall in December: 0.2"
The month with the highest snowfall is February (1.02").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Monroe, WA
- Average snowfall days in December: 1.1 days
The month with the highest number of snowfall days is February (2.8 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
Monroe, WA
- Average daylight in December: 8h and 30min
The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in December: 3h and 48min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 3h and 48min).
Average sunshine days in December
Monroe, WA
- Average sunshine days in December: 17.1 days
The month with the most sunshine days is August (25.5 days).
The month with the least sunshine days is April (15 days).
Average UV index in December
Monroe, 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, November and December (UV index 2).
Average cloud cover in December
Monroe, WA
- Average cloud cover in December: 60
The month with the most cloud cover is December (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in December
Monroe, WA
- Average visibility in December: 4mi
The month with the highest visibility is July (6mi).
The months with the lowest visibility are January, February, March, April, November and December (4mi).
