Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
December is the month when Morton experiences its coldest temperatures, averaging a high of 41.2°F (5.1°C) and a low of 30.7°F (-0.7°C).Humidity
In December, the average relative humidity is 87%.Rainfall
In Morton, in December, it is raining for 17.5 days, with typically 5.83" (148mm) of accumulated precipitation. Throughout the year, in Morton, there are 178.8 rainfall days, and 40.47" (1028mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through April, November and December. In Morton, in December, during 3.5 snowfall days, 1.77" (45mm) of snow is typically accumulated. In Morton, during the entire year, snow falls for 20 days and aggregates up to 17.24" (438mm) 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 the month, sunrise is at 7:33 am and sunset at 4:23 pm. On the last day of December, in Morton, sunrise is at 7:53 am and sunset at 4:31 pm PST.
Sunshine
In Morton, the average sunshine in December is 3.9h.UV index
In Morton, the average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: In December, the maximum UV index of 2 suggests this advice:
Extended time in the sun generally does not harm most, but those with sensitive skin, infants, and children should always be protected. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the coldest months?
How cold does it get in December?
What is the average humidity in December in Morton?
How much does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
What is the average length of the day in December?
What time are sunrise and sunset in December?
How long on average sun shines in December?
What is the UV index intensity in December?
Average temperature in December
Morton, WA
- Average high temperature in December: 41.2°F
The warmest month (with the highest average high temperature) is August (75.9°F).
The month with the lowest average high temperature is December (41.2°F).
- Average low temperature in December: 30.7°F
The month with the highest average low temperature is August (47.3°F).
The coldest month (with the lowest average low temperature) is December (30.7°F).
Average pressure in December
Morton, WA
- Average pressure in December: 30.09"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).
Average wind speed in December
Morton, WA
- Average wind speed in December: 5mph
The windiest month (with the highest average wind speed) is January (5.3mph).
The calmest month (with the lowest average wind speed) is August (3.6mph).
Average humidity in December
Morton, WA
- Average humidity in December: 87%
The month with the highest relative humidity is February (88%).
The month with the lowest relative humidity is July (71%).
Average rainfall in December
Morton, WA
- Average rainfall in December: 5.83"
The wettest month (with the highest rainfall) is January (6.46").
The driest month (with the least rainfall) is July (0.43").
Average rainfall days in December
Morton, WA
- Average rainfall days in December: 17.5 days
The month with the highest number of rainy days is March (20.3 days).
The month with the least rainy days is July (6.3 days).
Average snowfall in December
Morton, WA
- Average snowfall in December: 1.77"
The month with the highest snowfall is January (5.51").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Morton, WA
- Average snowfall days in December: 3.5 days
The month with the highest number of snowfall days is February (6 days).
The months with the least snowfall days are June, July, August and October (0 days).
Average daylight in December /
Average sunshine in December
Morton, WA
- Average daylight in December: 8h and 4min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in December: 3h and 5min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The months with the least sunshine are January and February (Average sunshine: 3h and 48min).
Average sunshine days in December
Morton, WA
- Average sunshine days in December: 10.5 days
The month with the most sunshine days is August (23.2 days).
The month with the least sunshine days is February (8.2 days).
Average UV index in December
Morton, WA
- Average UV index in December: 2
The month with the highest UV index is July (UV index 5).
The month with the lowest UV index is November (UV index 1).
Average cloud cover in December
Morton, WA
- Average cloud cover in December: 60
The month with the most cloud cover is March (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in December
Morton, WA
- Average visibility in December: 4mi
The months with the highest visibility are July, August and September (5mi).
The months with the lowest visibility are January, February, March, April, May, June, October, November and December (4mi).
Morton, Washington, USA
Weather forecast for your location
2. Allow the app to use your location