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
January brings a marginal elevation to a still wintry 39.9°F (4.4°C) from December's 38.7°F (3.7°C) in Plymouth's average high-temperatures. Plymouth registers a consistent average low-temperature of 29.7°F (-1.3°C) during January.Humidity
The most humid month is January, with an average relative humidity of 79%.Rainfall
In Plymouth, in January, during 11.3 rainfall days, 0.98" (25mm) of precipitation is typically accumulated. Throughout the year, there are 106.1 rainfall days, and 7.76" (197mm) of precipitation is accumulated.Snowfall
January through March, September, November and December are months with snowfall. In Plymouth, during January, snow falls for 2.3 days and regularly aggregates up to 1.06" (27mm) of snow. In Plymouth, during the entire year, snow falls for 10.3 days and aggregates up to 6.02" (153mm) of snow.Daylight
In January, the average length of the day is 9h and 8min.On the first day of the month, sunrise is at 7:38 am and sunset at 4:22 pm. On the last day of January, sunrise is at 7:20 am and sunset at 5:00 pm PST.
Sunshine
January and December, with an average of 5.4h of sunshine, are months with the least 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 value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV rays for the average person.Note: The average daily UV index of 2 in January transforms into the following instructions:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Stay sun-safe with clothing that is both closely woven and worn loosely. Be on the lookout! Nearly twofold UV radiation from the Sun can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is January cold?
What is the most humid month in Plymouth?
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 Plymouth have in January?
What time are sunrise and sunset in January?
What are the months with the least sunshine?
How long on average sun shines in January in Plymouth?
What is the month with the lowest UV index?
How high is the UV index in January?
Average temperature in January
Plymouth, WA
- Average high temperature in January: 39.9°F
The warmest month (with the highest average high temperature) is July (89.1°F).
The month with the lowest average high temperature is December (38.7°F).
- Average low temperature in January: 29.7°F
The month with the highest average low temperature is August (64.2°F).
The coldest month (with the lowest average low temperature) is December (28.6°F).
Average pressure in January
Plymouth, WA
- Average pressure in January: 30.19"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is August (29.91"Hg).
Average wind speed in January
Plymouth, WA
- Average wind speed in January: 6.6mph
The windiest month (with the highest average wind speed) is April (9.3mph).
The calmest month (with the lowest average wind speed) is December (6.2mph).
Average humidity in January
Plymouth, WA
- Average humidity in January: 79%
The month with the highest relative humidity is January (79%).
The months with the lowest relative humidity are July and August (36%).
Average rainfall in January
Plymouth, WA
- Average rainfall in January: 0.98"
The wettest month (with the highest rainfall) is March (1.02").
The driest month (with the least rainfall) is July (0.16").
Average rainfall days in January
Plymouth, WA
- Average rainfall days in January: 11.3 days
The month with the highest number of rainy days is March (13.1 days).
The month with the least rainy days is July (3.8 days).
Average snowfall in January
Plymouth, WA
- Average snowfall in January: 1.06"
The month with the highest snowfall is February (2.83").
The months with the least snowfall are April, May, June, July, August and October (0").
Average snowfall days in January
Plymouth, WA
- Average snowfall days in January: 2.3 days
The month with the highest number of snowfall days is December (3.2 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
Plymouth, 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: 5h and 2min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The months with the least sunshine are January and December (Average sunshine: 5h and 24min).
Average sunshine days in January
Plymouth, WA
- 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 February (14 days).
Average UV index in January
Plymouth, WA
- 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
Plymouth, WA
- Average cloud cover in January: 44
The months with the most cloud cover are January and December (Cloud cover 44).
The month with the least cloud cover is July (Cloud cover 9).
Average visibility in January
Plymouth, WA
- 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).
Plymouth, Washington, USA
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