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
On the advent of January, Sunnyside's average high-temperature exhibits a minor adjustment to a still cold 36.5°F (2.5°C) from December's 36.1°F (2.3°C). Sunnyside's average low-temperature for the month of January records at a freezing cold 26.6°F (-3°C).Humidity
With an average relative humidity of 83%, January is the most humid month in Sunnyside.Rainfall
In Sunnyside, in January, during 10.8 rainfall days, 1.06" (27mm) of precipitation is typically accumulated. Throughout the year, there are 104.5 rainfall days, and 8.23" (209mm) of precipitation is accumulated.Snowfall
January through March, September, November and December are months with snowfall. In Sunnyside, in January, during 4.6 snowfall days, 2.01" (51mm) of snow is typically accumulated. Throughout the year, there are 15.6 snowfall days, and 7.36" (187mm) of snow is accumulated.Daylight
The average length of the day in January is 9h and 6min.On the first day of January, sunrise is at 7:43 am and sunset at 4:23 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 5:02 pm PST.
Sunshine
January has the least sunshine of the year, with an average of 4.9h of sunshine.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for the average person.Note: In January, the maximum UV index of 2 translates into these guidelines:
Prolonged sun exposure generally does not trouble most people. However, it is vital to ensure protection for babies, children, and individuals with sensitive skin. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Remember to consider! The UV radiation from the Sun can be intensified nearly twice by the reflection of snow.
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 much does it rain in January?
How much does it snow in January?
What is the average length of the day in January?
When is the sunrise / sunset in January?
What is the month with the least sunshine?
How long on average sun shines in January?
When is the lowest UV index?
What is the UV index reading in January?
Average temperature in January
Sunnyside, WA
- Average high temperature in January: 36.5°F
The warmest month (with the highest average high temperature) is July (87.1°F).
The month with the lowest average high temperature is December (36.1°F).
- Average low temperature in January: 26.6°F
The month with the highest average low temperature is August (61.5°F).
The coldest month (with the lowest average low temperature) is December (25.3°F).
Average pressure in January
Sunnyside, WA
- Average pressure in January: 30.17"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is August (29.92"Hg).
Average wind speed in January
Sunnyside, WA
- Average wind speed in January: 5.2mph
The windiest month (with the highest average wind speed) is April (8.3mph).
The calmest month (with the lowest average wind speed) is December (5mph).
Average humidity in January
Sunnyside, WA
- Average humidity in January: 83%
The month with the highest relative humidity is January (83%).
The months with the lowest relative humidity are July and August (38%).
Average rainfall in January
Sunnyside, WA
- Average rainfall in January: 1.06"
The wettest month (with the highest rainfall) is May (1.1").
The driest month (with the least rainfall) is July (0.24").
Average rainfall days in January
Sunnyside, WA
- Average rainfall days in January: 10.8 days
The month with the highest number of rainy days is March (13.3 days).
The month with the least rainy days is July (4.1 days).
Average snowfall in January
Sunnyside, WA
- Average snowfall in January: 2.01"
The month with the highest snowfall is December (2.24").
The months with the least snowfall are April, May, June, July, August and October (0").
Average snowfall days in January
Sunnyside, WA
- Average snowfall days in January: 4.6 days
The month with the highest number of snowfall days is December (5 days).
The months with the least snowfall days are April, May, June, July, August and October (0 days).
Average daylight in January /
Average sunshine in January
Sunnyside, WA
- Average daylight in January: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in January: 4h and 5min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 54min).
Average sunshine days in January
Sunnyside, WA
- Average sunshine days in January: 15.9 days
The month with the most sunshine days is July (26.2 days).
The month with the least sunshine days is March (15.4 days).
Average UV index in January
Sunnyside, WA
- Average UV index in January: 2
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in January
Sunnyside, WA
- Average cloud cover in January: 50
The month with the most cloud cover is January (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 10).
Average visibility in January
Sunnyside, WA
- Average visibility in January: 5mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January and December (5mi).
Sunnyside, Washington, USA
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