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
Lyons witnesses the coldest weather in December, with temperatures averaging a high of 42.6°F (5.9°C) and a low of 31.1°F (-0.5°C).Humidity
In December, the average relative humidity in Lyons is 85%.Rainfall
December is the month with the most rainfall. Rain falls for 18.9 days and accumulates 6.65" (169mm) of precipitation.Snowfall
Months with snowfall in Lyons are January through April, November and December. In Lyons, Oregon, in December, during 2.1 snowfall days, 1.1" (28mm) of snow is typically accumulated. Throughout the year, in Lyons, there are 14.4 snowfall days, and 15.59" (396mm) of snow is accumulated.Daylight
December has the shortest days of the year, with an average of 8h and 54min of daylight.On the first day of the month, sunrise is at 7:28 am and sunset at 4:31 pm. On the last day of December, in Lyons, sunrise is at 7:47 am and sunset at 4:39 pm PST.
Sunshine
The average sunshine in December is 3.8h.UV index
In Lyons, the average daily maximum UV index in December is 2. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: In December, a regular UV index of 2 translates into these guidelines:
The majority are not significantly affected by prolonged sun exposure. Infants, children, and those with fair skin must always have protection. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
Frequently asked questions
What is the coldest time of year in Lyons?
How cold is December in Lyons?
What is the average humidity in December in Lyons?
What is the rainiest month in Lyons?
How much does it rain in Lyons in December?
How many days does it snow in December in Lyons?
What is the month with the shortest days in Lyons?
How many hours of daylight does Lyons have in December?
When are sunrise and sunset in December in Lyons?
How many hours of sunshine does Lyons have in December?
What is the UV index reading in December in Lyons?
Average temperature in December
Lyons, OR
- Average high temperature in December: 42.6°F
The warmest month (with the highest average high temperature) is August (77.7°F).
The month with the lowest average high temperature is December (42.6°F).
- Average low temperature in December: 31.1°F
The month with the highest average low temperature is August (48.4°F).
The coldest month (with the lowest average low temperature) is December (31.1°F).
Average pressure in December
Lyons, OR
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).
Average wind speed in December
Lyons, OR
- Average wind speed in December: 5.9mph
The windiest month (with the highest average wind speed) is January (6.2mph).
The calmest month (with the lowest average wind speed) is August (3.9mph).
Average humidity in December
Lyons, OR
- Average humidity in December: 85%
The month with the highest relative humidity is March (87%).
The month with the lowest relative humidity is August (67%).
Average rainfall in December
Lyons, OR
- Average rainfall in December: 6.65"
The wettest month (with the highest rainfall) is December (6.65").
The driest month (with the least rainfall) is July (0.35").
Average rainfall days in December
Lyons, OR
- Average rainfall days in December: 18.9 days
The month with the highest number of rainy days is March (21.2 days).
The month with the least rainy days is July (5.4 days).
Average snowfall in December
Lyons, OR
- Average snowfall in December: 1.1"
The month with the highest snowfall is February (6.5").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Lyons, OR
- Average snowfall days in December: 2.1 days
The month with the highest number of snowfall days is February (5.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Lyons, OR
- Average daylight in December: 8h and 5min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in December: 3h and 5min
The month with the most sunshine is August (Average sunshine: 11h and 0min).
The month with the least sunshine is February (Average sunshine: 3h and 30min).
Average sunshine days in December
Lyons, OR
- Average sunshine days in December: 10.6 days
The month with the most sunshine days is July (23.8 days).
The month with the least sunshine days is March (7.7 days).
Average UV index in December
Lyons, OR
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 5).
The month with the lowest UV index is November (UV index 1).
Average cloud cover in December
Lyons, OR
- Average cloud cover in December: 59
The months with the most cloud cover are February and March (Cloud cover 64).
The month with the least cloud cover is August (Cloud cover 21).
Average visibility in December
Lyons, OR
- Average visibility in December: 5mi
The month with the highest visibility is August (6mi).
The months with the lowest visibility are February and April (4mi).
Lyons, Oregon, USA
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