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
In Steptoe, the lowest temperatures are generally noted in December, averaging a high of 34.7°F (1.5°C) and a low of 24.6°F (-4.1°C).Humidity
In Steptoe, the average relative humidity in December is 84%.Rainfall
December is the month with the most rainfall. Rain falls for 9.5 days and accumulates 1.93" (49mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. In Steptoe, during December, snow falls for 9.6 days and regularly aggregates up to 4.65" (118mm) of snow. In Steptoe, during the entire year, snow falls for 39.6 days and aggregates up to 22.68" (576mm) of snow.Daylight
December has the shortest days of the year, with an average of 8h and 36min of daylight.On the first day of the month, sunrise is at 7:15 am and sunset at 4:02 pm. On the last day of December, sunrise is at 7:35 am and sunset at 4:10 pm PST.
Sunshine
The months with the least sunshine in Steptoe are January and December, with an average of 4.6h of sunshine.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 of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: In December, the maximum UV index of 2 suggests these recommendations:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What time of the year is the coldest?
How cold is December?
What is the average humidity in December?
What is the wettest month?
How many days does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Steptoe have in December?
When is the sunrise / sunset in December?
What is the month with the least sunshine?
How many hours of sunshine does Steptoe have in December?
What are the months with the lowest UV index in Steptoe?
What is the UV index reading in December in Steptoe?
Average temperature in December
Steptoe, WA
- Average high temperature in December: 34.7°F
The warmest month (with the highest average high temperature) is August (83.5°F).
The month with the lowest average high temperature is December (34.7°F).
- Average low temperature in December: 24.6°F
The month with the highest average low temperature is August (60.4°F).
The coldest month (with the lowest average low temperature) is December (24.6°F).
Average pressure in December
Steptoe, WA
- Average pressure in December: 30.17"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is August (29.91"Hg).
Average wind speed in December
Steptoe, WA
- Average wind speed in December: 7mph
The windiest month (with the highest average wind speed) is March (8mph).
The calmest month (with the lowest average wind speed) is August (5.9mph).
Average humidity in December
Steptoe, WA
- Average humidity in December: 84%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is August (37%).
Average rainfall in December
Steptoe, WA
- Average rainfall in December: 1.93"
The wettest month (with the highest rainfall) is December (1.93").
The driest month (with the least rainfall) is July (0.28").
Average rainfall days in December
Steptoe, WA
- Average rainfall days in December: 9.5 days
The month with the highest number of rainy days is April (14.6 days).
The month with the least rainy days is July (4.5 days).
Average snowfall in December
Steptoe, WA
- Average snowfall in December: 4.65"
The month with the highest snowfall is February (6.69").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Steptoe, WA
- Average snowfall days in December: 9.6 days
The months with the highest number of snowfall days are February and December (9.6 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Steptoe, 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: 4h and 4min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The months with the least sunshine are January and December (Average sunshine: 4h and 36min).
Average sunshine days in December
Steptoe, WA
- Average sunshine days in December: 15.5 days
The month with the most sunshine days is July (24.6 days).
The month with the least sunshine days is February (12.2 days).
Average UV index in December
Steptoe, 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
Steptoe, WA
- Average cloud cover in December: 53
The months with the most cloud cover are January and December (Cloud cover 53).
The month with the least cloud cover is July (Cloud cover 11).
Average visibility in December
Steptoe, WA
- Average visibility in December: 5mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (5mi).
Steptoe, Washington, USA
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