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, with its average high-temperature of 36°F (2.2°C) and an average low-temperature of 23.9°F (-4.5°C), holds the record as the coldest month.Humidity
In December, the average relative humidity is 82%.Rainfall
December is the month with the most rainfall in Hillside Siding. Rain falls for 9.2 days and accumulates 0.87" (22mm) of precipitation.Snowfall
January through April, September, November and December are months with snowfall in Hillside Siding, Washington. December is the month with the most snowfall. Snow falls for 5.7 days and accumulates 3.07" (78mm) of snow.Daylight
The month with the shortest days is December, with an average of 8h and 36min of daylight.On the first day of December in Hillside Siding, sunrise is at 7:26 am and sunset at 4:15 pm. On the last day of the month, sunrise is at 7:46 am and sunset at 4:23 pm PST.
Sunshine
In Hillside Siding, the average sunshine in December is 5.8h.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 health risk from unprotected exposure to Sun's UV rays for average individuals.Note: In December, the maximum UV index of 2 suggests this advice:
Children necessitate constant protection from sunlight, unlike the majority, who can remain under the sun for about an hour without burning. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Frequently asked questions
What part of the year is the coldest in Hillside Siding?
How cold is December in Hillside Siding?
What is the average humidity in December in Hillside Siding?
What is the wettest month in Hillside Siding?
How many days does it rain in December in Hillside Siding?
When does it snow the most in Hillside Siding?
How much does it snow in Hillside Siding in December?
What is the month with the shortest days in Hillside Siding?
What is the average length of the day in December in Hillside Siding?
When are sunrise and sunset in December in Hillside Siding?
How many hours of sunshine does Hillside Siding have in December?
What are the months with the lowest UV index in Hillside Siding?
How high is the UV index in December in Hillside Siding?
Average temperature in December
Hillside Siding, WA
- Average high temperature in December: 36°F
The warmest month (with the highest average high temperature) is August (85.1°F).
The month with the lowest average high temperature is December (36°F).
- Average low temperature in December: 23.9°F
The month with the highest average low temperature is August (58.8°F).
The coldest month (with the lowest average low temperature) is December (23.9°F).
Average pressure in December
Hillside Siding, WA
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is August (29.93"Hg).
Average wind speed in December
Hillside Siding, WA
- Average wind speed in December: 4.2mph
The windiest month (with the highest average wind speed) is June (7.4mph).
The calmest month (with the lowest average wind speed) is December (4.2mph).
Average humidity in December
Hillside Siding, WA
- Average humidity in December: 82%
The month with the highest relative humidity is January (83%).
The months with the lowest relative humidity are July and August (41%).
Average rainfall in December
Hillside Siding, WA
- Average rainfall in December: 0.87"
The wettest month (with the highest rainfall) is December (0.87").
The driest month (with the least rainfall) is July (0.08").
Average rainfall days in December
Hillside Siding, WA
- Average rainfall days in December: 9.2 days
The month with the highest number of rainy days is March (10.8 days).
The month with the least rainy days is July (2.3 days).
Average snowfall in December
Hillside Siding, WA
- Average snowfall in December: 3.07"
The month with the highest snowfall is December (3.07").
The months with the least snowfall are May, June, July, August and October (0").
Average snowfall days in December
Hillside Siding, WA
- Average snowfall days in December: 5.7 days
The month with the highest number of snowfall days is December (5.7 days).
The months with the least snowfall days are May, June, July, August and October (0 days).
Average daylight in December /
Average sunshine in December
Hillside Siding, 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: 5h and 5min
The months with the most sunshine are July and August (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 30min).
Average sunshine days in December
Hillside Siding, WA
- Average sunshine days in December: 17.9 days
The month with the most sunshine days is July (27.6 days).
The month with the least sunshine days is February (15.5 days).
Average UV index in December
Hillside Siding, 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, November and December (UV index 2).
Average cloud cover in December
Hillside Siding, WA
- Average cloud cover in December: 38
The month with the most cloud cover is January (Cloud cover 40).
The months with the least cloud cover are July and August (Cloud cover 9).
Average visibility in December
Hillside Siding, WA
- Average visibility in December: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Hillside Siding, Washington, USA
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