January weather forecastArock, OR
January
Weather in January
January, the same as December, is a wintry winter month in Arock, Oregon, with temperature in the range of an average high of 36°F (2.2°C) and an average low of 23.4°F (-4.8°C).Temperature
January experiences an average high-temperature of a still wintry 36°F (2.2°C), barely different from December's 34.3°F (1.3°C). Arock experiences an average temperature drop to a subzero cold 23.4°F (-4.8°C) during January nights.Humidity
The months with the highest humidity are January and December, with an average relative humidity of 77%.Rainfall
In Arock, in January, it is raining for 8.9 days, with typically 1.14" (29mm) of accumulated precipitation. Throughout the year, there are 101.4 rainfall days, and 10.08" (256mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall in Arock. In Arock, in January, during 10.2 snowfall days, 4.8" (122mm) of snow is typically accumulated. In Arock, during the entire year, snow falls for 44.7 days and aggregates up to 21.38" (543mm) of snow.Daylight
The average length of the day in January in Arock, Oregon, is 9h and 27min.On the first day of the month, sunrise is at 8:21 am and sunset at 5:26 pm. On the last day of January, sunrise is at 8:05 am and sunset at 6:01 pm MST.
Sunshine
In Arock, the average sunshine in January is 6.1h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: An average UV index of 2 in January transforms into this advice:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. A hat with a broad brim is indispensable, filtering out up to half of UV rays. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in January
Arock, OR
- Average high temperature in January: 36°F
The warmest month (with the highest average high temperature) is July (87.3°F).
The month with the lowest average high temperature is December (34.3°F).
- Average low temperature in January: 23.4°F
The month with the highest average low temperature is August (64.6°F).
The coldest month (with the lowest average low temperature) is December (22.8°F).
Average pressure in January
Arock, OR
- Average pressure in January: 30.24"Hg
The month with the highest atmospheric pressure is January (30.24"Hg).
The months with the lowest atmospheric pressure are June, July and August (29.91"Hg).
Average wind speed in January
Arock, OR
- Average wind speed in January: 6.3mph
The windiest month (with the highest average wind speed) is March (8.7mph).
The calmest months (with the lowest average wind speed) are January and August (6.3mph).
Average humidity in January
Arock, OR
- Average humidity in January: 77%
The months with the highest relative humidity are January and December (77%).
The months with the lowest relative humidity are July and August (25%).
Average rainfall in January
Arock, OR
- Average rainfall in January: 1.14"
The wettest month (with the highest rainfall) is March (1.46").
The driest months (with the least rainfall) are July and August (0.16").
Average rainfall days in January
Arock, OR
- Average rainfall days in January: 8.9 days
The month with the highest number of rainy days is March (15.6 days).
The month with the least rainy days is July (2.6 days).
Average snowfall in January
Arock, OR
- Average snowfall in January: 4.8"
The month with the highest snowfall is December (6.34").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Arock, OR
- Average snowfall days in January: 10.2 days
The month with the highest number of snowfall days is December (11.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Arock, OR
- Average daylight in January: 9h and 30min
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 January: 6h and 6min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).
Average sunshine days in January
Arock, OR
- Average sunshine days in January: 16.4 days
The month with the most sunshine days is July (26.6 days).
The month with the least sunshine days is March (12.3 days).
Average UV index in January
Arock, OR
- Average UV index in January: 2
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in January
Arock, OR
- Average cloud cover in January: 37
The month with the most cloud cover is December (Cloud cover 38).
The month with the least cloud cover is July (Cloud cover 8).
Average visibility in January
Arock, OR
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
