December weather forecastProspect, OR
December
Weather in December
The first month of the winter, December, is also a frosty month in Prospect, Oregon, with temperature in the range of an average low of 28.6°F (-1.9°C) and an average high of 42.8°F (6°C).Temperature
Prospect's coldest month, December, generally records average temperatures ranging from a high of 42.8°F (6°C) to a low of 28.6°F (-1.9°C).Humidity
In December, the average relative humidity in Prospect is 83%.Rainfall
December is the month with the most rainfall. Rain falls for 15.3 days and accumulates 3.82" (97mm) of precipitation.Snowfall
January through May, November and December are months with snowfall. In Prospect, in December, snow falls for 5.4 days, with typically accumulated 3.03" (77mm) of snow. Throughout the year, there are 25 snowfall days, and 21.77" (553mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 9h and 6min of daylight.On the first day of the month, sunrise is at 7:21 am and sunset at 4:37 pm. On the last day of December, in Prospect, sunrise is at 7:40 am and sunset at 4:46 pm PST.
Sunshine
The month with the least sunshine is December, with an average of 5h of sunshine.UV index
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV radiation for average individuals.Note: In December, the maximum UV index of 2 transforms into these recommendations:
While many people can endure lengthy sun exposure, it remains imperative to safeguard babies, children, and fair-skinned individuals. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Prospect, OR
- Average high temperature in December: 42.8°F
The warmest month (with the highest average high temperature) is August (82°F).
The month with the lowest average high temperature is December (42.8°F).
- Average low temperature in December: 28.6°F
The month with the highest average low temperature is August (48.6°F).
The coldest month (with the lowest average low temperature) is December (28.6°F).
Average pressure in December
Prospect, OR
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is August (29.98"Hg).
Average wind speed in December
Prospect, OR
- Average wind speed in December: 4.7mph
The windiest month (with the highest average wind speed) is January (5mph).
The calmest month (with the lowest average wind speed) is September (3.9mph).
Average humidity in December
Prospect, OR
- Average humidity in December: 83%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is August (60%).
Average rainfall in December
Prospect, OR
- Average rainfall in December: 3.82"
The wettest month (with the highest rainfall) is December (3.82").
The driest month (with the least rainfall) is July (0.24").
Average rainfall days in December
Prospect, OR
- Average rainfall days in December: 15.3 days
The month with the highest number of rainy days is March (18.3 days).
The month with the least rainy days is July (3.8 days).
Average snowfall in December
Prospect, OR
- Average snowfall in December: 3.03"
The month with the highest snowfall is February (6.77").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in December
Prospect, OR
- Average snowfall days in December: 5.4 days
The month with the highest number of snowfall days is February (6.2 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Prospect, OR
- Average daylight in December: 9h and 6min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in December: 5h and 0min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).
Average sunshine days in December
Prospect, OR
- Average sunshine days in December: 11.8 days
The month with the most sunshine days is July (25.7 days).
The month with the least sunshine days is February (10 days).
Average UV index in December
Prospect, OR
- Average UV index in December: 2
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in December
Prospect, OR
- Average cloud cover in December: 49
The month with the most cloud cover is March (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 13).
Average visibility in December
Prospect, OR
- Average visibility in December: 4mi
The months with the highest visibility are July, August and September (6mi).
The month with the lowest visibility is December (4mi).
