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
Wilsonville's shift into January sets the average high-temperature at a still frosty 46°F (7.8°C), a figure that deviates only slightly from December's 44.2°F (6.8°C). Wilsonville experiences a steady low-temperature of 35.1°F (1.7°C) throughout January.Humidity
January, February and December, with an average relative humidity of 85%, are the most humid months.Rainfall
In Wilsonville, in January, during 18.4 rainfall days, 4.21" (107mm) of precipitation is typically accumulated. Throughout the year, there are 173.8 rainfall days, and 29.96" (761mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through March, November and December. In Wilsonville, in January, during 1.4 snowfall days, 0.55" (14mm) of snow is typically accumulated. Throughout the year, in Wilsonville, there are 6.1 snowfall days, and 3.66" (93mm) of snow is accumulated.Daylight
The average length of the day in January is 9h and 13min.On the first day of the month, sunrise is at 7:50 am and sunset at 4:38 pm. On the last day of January, in Wilsonville, sunrise is at 7:32 am and sunset at 5:16 pm PST.
Sunshine
The average sunshine in January is 4.3h.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 reading of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for the ordinary person.Note: A typical high UV index of 2 in January suggests the following recommendations:
Prolonged sun exposure should always be prevented in babies, children, and those with sensitive skin. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are January temperatures?
What are the most humid months?
What is the average humidity in January?
How much 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?
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?
Average temperature in January
Wilsonville, OR
- Average high temperature in January: 46°F
The warmest month (with the highest average high temperature) is August (81°F).
The month with the lowest average high temperature is December (44.2°F).
- Average low temperature in January: 35.1°F
The month with the highest average low temperature is August (54°F).
The coldest month (with the lowest average low temperature) is December (34.3°F).
Average pressure in January
Wilsonville, OR
- Average pressure in January: 30.12"Hg
The month with the highest atmospheric pressure is January (30.12"Hg).
The months with the lowest atmospheric pressure are August and September (30.01"Hg).
Average wind speed in January
Wilsonville, OR
- Average wind speed in January: 5.5mph
The windiest months (with the highest average wind speed) are January and February (5.5mph).
The calmest month (with the lowest average wind speed) is August (3.8mph).
Average humidity in January
Wilsonville, OR
- Average humidity in January: 85%
The months with the highest relative humidity are January, February and December (85%).
The month with the lowest relative humidity is August (65%).
Average rainfall in January
Wilsonville, OR
- Average rainfall in January: 4.21"
The wettest month (with the highest rainfall) is December (4.49").
The driest months (with the least rainfall) are July and August (0.31").
Average rainfall days in January
Wilsonville, OR
- Average rainfall days in January: 18.4 days
The month with the highest number of rainy days is March (20.9 days).
The months with the least rainy days are July and August (4.4 days).
Average snowfall in January
Wilsonville, OR
- Average snowfall in January: 0.55"
The month with the highest snowfall is February (1.26").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in January
Wilsonville, OR
- Average snowfall days in January: 1.4 days
The month with the highest number of snowfall days is February (2.1 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in January /
Average sunshine in January
Wilsonville, OR
- Average daylight in January: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in January: 4h and 2min
The month with the most sunshine is August (Average sunshine: 11h and 6min).
The month with the least sunshine is February (Average sunshine: 4h and 12min).
Average sunshine days in January
Wilsonville, OR
- Average sunshine days in January: 11 days
The month with the most sunshine days is July (25 days).
The month with the least sunshine days is March (8.3 days).
Average UV index in January
Wilsonville, OR
- Average UV index in January: 2
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in January
Wilsonville, OR
- Average cloud cover in January: 56
The month with the most cloud cover is February (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 21).
Average visibility in January
Wilsonville, OR
- Average visibility in January: 5mi
The months with the highest visibility are July, August and September (6mi).
The months with the lowest visibility are January, February, March, April, May, June, October, November and December (5mi).
Wilsonville, Oregon, USA
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