December weather forecastLyons, OR
December
Weather in December
The first month of the winter, December, is still a cold month in Lyons, Oregon, with an average temperature ranging between max 42.6°F (5.9°C) and min 31.1°F (-0.5°C).Temperature
Lyons's December weather, with an average high temperature of 42.6°F (5.9°C) and an average low temperature of 31.1°F (-0.5°C), tends to be the coldest of the year.Humidity
In Lyons, the average relative humidity in December is 85%.Rainfall
The month with the most rainfall is December, when the rain falls for 18.9 days and typically aggregates up to 6.65" (169mm) of precipitation.Snowfall
January through April, November and December are months with snowfall. In Lyons, in December, during 2.1 snowfall days, 1.1" (28mm) of snow is typically accumulated. Throughout the year, there are 14.4 snowfall days, and 15.59" (396mm) of snow is accumulated.Daylight
The month with the shortest days in Lyons is December, 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, sunrise is at 7:47 am and sunset at 4:39 pm PST.
Sunshine
In December, the average sunshine is 3.8h.UV index
In Lyons, the average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: The average daily UV index of 2 in December transforms into the following instructions:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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 54min
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 48min
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).
