Contents
- Weather in January
- Frequently asked questions
- Average temperature in January
- Average pressure in January
- Average wind speed in January
- Average humidity in January
- Average rainfall in January
- Average rainfall days in January
- Average snowfall in January
- Average snowfall days in January
- Average daylight in January
- Average sunshine in January
- Average sunshine days in January
- Average UV index in January
- Average cloud cover in January
- Average visibility in January
Weather in January
Temperature
As January takes hold, the average high-temperature is a still chilly 46.9°F (8.3°C), nearly mirroring that of the previous month. Throughout January, the nighttime temperature averages to an icy 34.3°F (1.3°C).Humidity
In January, the average relative humidity is 85%.Rainfall
In Foster, in January, it is raining for 17.4 days, with typically 4.92" (125mm) of accumulated precipitation. Throughout the year, there are 167.6 rainfall days, and 36.54" (928mm) of precipitation is accumulated.Snowfall
January through April, November and December are months with snowfall. In Foster, in January, during 1.5 snowfall days, 2.01" (51mm) of snow is typically accumulated. Throughout the year, in Foster, there are 7.9 snowfall days, and 7.76" (197mm) of snow is accumulated.Daylight
In Foster, the average length of the day in January is 9h and 18min.On the first day of January, sunrise is at 7:46 am and sunset at 4:41 pm. On the last day of the month, sunrise is at 7:30 am and sunset at 5:18 pm PST.
Sunshine
In January, the average sunshine is 4.3h.UV index
The average daily maximum UV index in January is 2. A UV Index estimate of 2, and below, represents a low health risk from exposure to the Sun's UV rays for the average person.Note: A maximum daily UV index of 2 during January morphs into the following directions:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average January temperature?
What is the average humidity in January?
How much does it rain in January?
How much does it snow in January?
How many hours of daylight does Foster have in January?
What time are sunrise and sunset in January?
How long on average sun shines in January?
What is the UV index reading in January?
Average temperature in January
Foster, OR
- Average high temperature in January: 46.9°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 January: 34.3°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 January
Foster, OR
- Average pressure in January: 30.12"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 January
Foster, OR
- Average wind speed in January: 5.1mph
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 January
Foster, OR
- Average humidity in January: 85%
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 January
Foster, OR
- Average rainfall in January: 4.92"
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 January
Foster, OR
- Average rainfall days in January: 17.4 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 January
Foster, OR
- Average snowfall in January: 2.01"
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 January
Foster, OR
- Average snowfall days in January: 1.5 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 January /
Average sunshine in January
Foster, OR
- Average daylight in January: 9h and 2min
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 January: 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 January
Foster, OR
- Average sunshine days in January: 12.3 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 January
Foster, OR
- Average UV index in January: 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 January
Foster, OR
- Average cloud cover in January: 55
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 January
Foster, OR
- Average visibility in January: 5mi
The month with the highest visibility is August (6mi).
The months with the lowest visibility are February and April (4mi).
Foster, Oregon, USA
Weather forecast for your location
2. Allow the app to use your location