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
Riverside's average high-temperature in January sits at a cold 32.7°F (0.4°C), showing little difference from the previous month. Riverside records a mean low-temperature of 19.2°F (-7.1°C) in January.Humidity
With an average relative humidity of 85%, January is the most humid month.Rainfall
In Riverside, in January, during 9.7 rainfall days, 1.46" (37mm) of precipitation is typically accumulated. Throughout the year, there are 109.9 rainfall days, and 11.34" (288mm) of precipitation is accumulated.Snowfall
January through May, November and December are months with snowfall in Riverside. In January, in Riverside, it is snowing for 11.1 days. Throughout January, 6.1" (155mm) of snow is accumulated. In Riverside, during the entire year, snow falls for 46.8 days and aggregates up to 25.75" (654mm) of snow.Daylight
The average length of the day in January is 9h and 23min.On the first day of January, sunrise is at 8:25 am and sunset at 5:26 pm. On the last day of the month, sunrise is at 8:09 am and sunset at 6:02 pm MST.
Sunshine
In Riverside, the average sunshine in January is 5.2h.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 minimal health vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum UV index of 2 during January translates into these guidelines:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is January?
What is the most humid month?
What is the average humidity in January?
How many days does it rain in January?
How many days does it snow in January?
What is the average length of the day in January?
When are sunrise and sunset in January in Riverside?
How long on average sun shines in January?
What are the months with the lowest UV index?
What is the UV index reading in January in Riverside?
Average temperature in January
Riverside, OR
- Average high temperature in January: 32.7°F
The warmest month (with the highest average high temperature) is July (85.3°F).
The month with the lowest average high temperature is December (31.8°F).
- Average low temperature in January: 19.2°F
The month with the highest average low temperature is August (59°F).
The coldest month (with the lowest average low temperature) is January (19.2°F).
Average pressure in January
Riverside, OR
- Average pressure in January: 30.23"Hg
The month with the highest atmospheric pressure is January (30.23"Hg).
The months with the lowest atmospheric pressure are June and August (29.93"Hg).
Average wind speed in January
Riverside, OR
- Average wind speed in January: 5mph
The windiest month (with the highest average wind speed) is April (7.8mph).
The calmest month (with the lowest average wind speed) is January (5mph).
Average humidity in January
Riverside, OR
- Average humidity in January: 85%
The month with the highest relative humidity is January (85%).
The months with the lowest relative humidity are July and August (31%).
Average rainfall in January
Riverside, OR
- Average rainfall in January: 1.46"
The wettest month (with the highest rainfall) is December (1.77").
The driest month (with the least rainfall) is July (0.12").
Average rainfall days in January
Riverside, OR
- Average rainfall days in January: 9.7 days
The month with the highest number of rainy days is March (15.3 days).
The month with the least rainy days is July (3.4 days).
Average snowfall in January
Riverside, OR
- Average snowfall in January: 6.1"
The month with the highest snowfall is December (9.13").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in January
Riverside, OR
- Average snowfall days in January: 11.1 days
The month with the highest number of snowfall days is December (13.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Riverside, OR
- Average daylight in January: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in January: 5h and 1min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).
Average sunshine days in January
Riverside, OR
- Average sunshine days in January: 15.7 days
The month with the most sunshine days is July (25.3 days).
The month with the least sunshine days is March (11.5 days).
Average UV index in January
Riverside, 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, March, November and December (UV index 2).
Average cloud cover in January
Riverside, OR
- Average cloud cover in January: 47
The months with the most cloud cover are January and December (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 8).
Average visibility in January
Riverside, OR
- Average visibility in January: 4mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
Riverside, Oregon, USA
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