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
The coldest month is December, with an average high-temperature of 36.9°F (2.7°C) and an average low-temperature of 25.5°F (-3.6°C).Humidity
In December, the average relative humidity is 80%.Rainfall
In December, in Wiley City, the rain falls for 9.1 days. Throughout December, 0.83" (21mm) of precipitation is accumulated. In Wiley City, during the entire year, the rain falls for 82.2 days and collects up to 5.43" (138mm) of precipitation.Snowfall
January through March, September, November and December are months with snowfall. December is the month with the most snowfall in Wiley City. Snow falls for 5.4 days and accumulates 2.76" (70mm) of snow.Daylight
The month with the shortest days in Wiley City is December, with an average of 8h and 36min of daylight.On the first day of December, sunrise is at 7:26 am and sunset at 4:17 pm. On the last day of the month, sunrise is at 7:46 am and sunset at 4:25 pm PST.
Sunshine
In December, the average sunshine in Wiley City is 5.9h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for the average person.Note: The maximum UV index of 2 during December translates into these guidelines:
Though the majority can handle prolonged sun exposure, it is crucial to always shield babies, children, and those with fair skin. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Frequently asked questions
What part of the year is the coldest in Wiley City?
How cold is it in Wiley City in December?
What is the average humidity in December in Wiley City?
How many days does it rain in December in Wiley City?
When does it snow the most in Wiley City?
How many days does it snow in December in Wiley City?
What is the month with the shortest days in Wiley City?
What is the average length of the day in December in Wiley City?
When are sunrise and sunset in December in Wiley City?
How long on average sun shines in December in Wiley City?
What are the months with the lowest UV index in Wiley City?
How high is the UV index in December in Wiley City?
Average temperature in December
Wiley City, WA
- Average high temperature in December: 36.9°F
The warmest month (with the highest average high temperature) is August (86.5°F).
The month with the lowest average high temperature is December (36.9°F).
- Average low temperature in December: 25.5°F
The month with the highest average low temperature is August (60.3°F).
The coldest month (with the lowest average low temperature) is December (25.5°F).
Average pressure in December
Wiley City, WA
- Average pressure in December: 30.14"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
Wiley City, WA
- Average wind speed in December: 4.4mph
The windiest month (with the highest average wind speed) is June (7.1mph).
The calmest month (with the lowest average wind speed) is December (4.4mph).
Average humidity in December
Wiley City, WA
- Average humidity in December: 80%
The month with the highest relative humidity is January (81%).
The months with the lowest relative humidity are July and August (39%).
Average rainfall in December
Wiley City, WA
- Average rainfall in December: 0.83"
The wettest month (with the highest rainfall) is January (0.87").
The driest month (with the least rainfall) is July (0.08").
Average rainfall days in December
Wiley City, WA
- Average rainfall days in December: 9.1 days
The month with the highest number of rainy days is March (10.8 days).
The month with the least rainy days is August (2 days).
Average snowfall in December
Wiley City, WA
- Average snowfall in December: 2.76"
The month with the highest snowfall is December (2.76").
The months with the least snowfall are April, May, June, July, August and October (0").
Average snowfall days in December
Wiley City, WA
- Average snowfall days in December: 5.4 days
The month with the highest number of snowfall days is December (5.4 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
Wiley City, 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 36min).
Average sunshine days in December
Wiley City, WA
- Average sunshine days in December: 17.3 days
The month with the most sunshine days is July (27.5 days).
The month with the least sunshine days is February (15.8 days).
Average UV index in December
Wiley City, WA
- Average UV index in December: 2
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Wiley City, WA
- Average cloud cover in December: 37
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
Wiley City, 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).
Wiley City, Washington, USA
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