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 coldest month, exhibiting average temperatures of 36.3°F (2.4°C) at the peak and 25.9°F (-3.4°C) at the base.Humidity
In Hay, the average relative humidity in December is 80%.Rainfall
The months with the most rainfall are March and December, with an average 1.69" (43mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. In Hay, in December, snow falls for 8 days, with typically accumulated 3.46" (88mm) of snow. Throughout the year, there are 32.7 snowfall days, and 16.77" (426mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 8h and 36min of daylight.On the first day of December, sunrise is at 7:16 am and sunset at 4:05 pm. On the last day of the month, sunrise is at 7:36 am and sunset at 4:14 pm PST.
Sunshine
In December, the average sunshine is 5.3h.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 reading of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for the average person.Note: In December, the UV index of 2 transforms into the following advice:
Though extended exposure to the sun typically does not concern most people, it is crucial to always shield children, infants, and those with sensitive skin. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. 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
What part of the year is the coldest?
How cold is it in December?
What is the average humidity in December in Hay?
What is the wettest month?
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 many hours of sunshine does Hay have in December?
What are the months with the lowest UV index?
What is the UV index reading in December?
Average temperature in December
Hay, WA
- Average high temperature in December: 36.3°F
The warmest month (with the highest average high temperature) is August (83.8°F).
The month with the lowest average high temperature is December (36.3°F).
- Average low temperature in December: 25.9°F
The month with the highest average low temperature is August (61.7°F).
The coldest month (with the lowest average low temperature) is December (25.9°F).
Average pressure in December
Hay, WA
- Average pressure in December: 30.17"Hg
The month with the highest atmospheric pressure is January (30.2"Hg).
The month with the lowest atmospheric pressure is August (29.91"Hg).
Average wind speed in December
Hay, WA
- Average wind speed in December: 6.7mph
The windiest month (with the highest average wind speed) is April (8.1mph).
The calmest months (with the lowest average wind speed) are August and September (6mph).
Average humidity in December
Hay, WA
- Average humidity in December: 80%
The month with the highest relative humidity is January (81%).
The month with the lowest relative humidity is August (37%).
Average rainfall in December
Hay, WA
- Average rainfall in December: 1.69"
The wettest months (with the highest rainfall) are March and December (1.69").
The driest month (with the least rainfall) is July (0.31").
Average rainfall days in December
Hay, WA
- Average rainfall days in December: 10.6 days
The month with the highest number of rainy days is March (15.7 days).
The month with the least rainy days is July (4.8 days).
Average snowfall in December
Hay, WA
- Average snowfall in December: 3.46"
The month with the highest snowfall is February (5.12").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Hay, WA
- Average snowfall days in December: 8 days
The months with the highest number of snowfall days are February and December (8 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Hay, 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 2min
The month with the most sunshine is August (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 5h and 0min).
Average sunshine days in December
Hay, WA
- Average sunshine days in December: 15.5 days
The month with the most sunshine days is July (25 days).
The month with the least sunshine days is March (11.9 days).
Average UV index in December
Hay, 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
Hay, WA
- Average cloud cover in December: 45
The months with the most cloud cover are January and February (Cloud cover 46).
The months with the least cloud cover are July and August (Cloud cover 11).
Average visibility in December
Hay, WA
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Hay, Washington, USA
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