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 Foster, Oregon, the lowest average temperatures are observed in December, with a high of 44.4°F (6.9°C) and a low of 32.9°F (0.5°C).Humidity
February, March and December, with an average relative humidity of 86%, are the most humid months.Rainfall
December is the month with the most rainfall in Foster, Oregon. Rain falls for 18.9 days and accumulates 5.47" (139mm) of precipitation.Snowfall
Months with snowfall are January through April, November and December. In Foster, in December, snow falls for 1 days, with typically accumulated 0.47" (12mm) of snow. In Foster, during the entire year, snow falls for 7.9 days and aggregates up to 7.76" (197mm) of snow.Daylight
The month with the shortest days in Foster is December, with an average of 8h and 54min of daylight.On the first day of the month, sunrise is at 7:27 am and sunset at 4:32 pm. On the last day of December, sunrise is at 7:46 am and sunset at 4:41 pm PST.
Sunshine
In December, the average sunshine is 4.3h.UV index
The average daily maximum UV index in December in Foster is 2. A UV Index estimate of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The UV index of 2 during December translates into the following guidance:
While most people are not greatly affected by extended sun exposure, those with fair skin, babies, and children must always have protection. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
Frequently asked questions
What is the coldest month in Foster?
How cold is December in Foster?
What are the most humid months in Foster?
What is the average humidity in December in Foster?
What is the rainiest month in Foster?
How many days does it rain in December in Foster?
How much does it snow in Foster in December?
What is the month with the shortest days in Foster?
What is the average length of the day in December in Foster?
When are sunrise and sunset in December in Foster?
How long on average sun shines in December in Foster?
What is the UV index reading in December in Foster?
Average temperature in December
Foster, OR
- Average high temperature in December: 44.4°F
The warmest month (with the highest average high temperature) is August (79.5°F).
The month with the lowest average high temperature is December (44.4°F).
- Average low temperature in December: 32.9°F
The month with the highest average low temperature is August (49.8°F).
The coldest month (with the lowest average low temperature) is December (32.9°F).
Average pressure in December
Foster, OR
- Average pressure in December: 30.11"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).
Average wind speed in December
Foster, OR
- Average wind speed in December: 5mph
The windiest month (with the highest average wind speed) is January (5.1mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).
Average humidity in December
Foster, OR
- Average humidity in December: 86%
The months with the highest relative humidity are February, March and December (86%).
The month with the lowest relative humidity is August (66%).
Average rainfall in December
Foster, OR
- Average rainfall in December: 5.47"
The wettest month (with the highest rainfall) is December (5.47").
The driest month (with the least rainfall) is July (0.24").
Average rainfall days in December
Foster, OR
- Average rainfall days in December: 18.9 days
The month with the highest number of rainy days is March (21.1 days).
The month with the least rainy days is July (4.1 days).
Average snowfall in December
Foster, OR
- Average snowfall in December: 0.47"
The month with the highest snowfall is February (3.7").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Foster, OR
- Average snowfall days in December: 1 days
The month with the highest number of snowfall days is February (3.4 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
Foster, 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: 4h and 2min
The month with the most sunshine is August (Average sunshine: 11h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 6min).
Average sunshine days in December
Foster, OR
- Average sunshine days in December: 11 days
The month with the most sunshine days is July (25.7 days).
The month with the least sunshine days is February (8.4 days).
Average UV index in December
Foster, OR
- Average UV index in December: 2
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is November (UV index 1).
Average cloud cover in December
Foster, OR
- Average cloud cover in December: 56
The months with the most cloud cover are February and March (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 19).
Average visibility in December
Foster, 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).
Foster, Oregon, USA
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