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
The onset of January notes an average high-temperature of a still chilly 45.3°F (7.4°C), subtly shifted from December's 43.5°F (6.4°C). In Rollingbay, January nights experience a modest descent in temperature from daily peaks, cooling down to an average of 37°F (2.8°C).Humidity
The months with the highest humidity in Rollingbay are January and December, with an average relative humidity of 85%.Rainfall
In Rollingbay, in January, it is raining for 17 days, with typically 3.54" (90mm) of accumulated precipitation. Throughout the year, there are 172.2 rainfall days, and 23.7" (602mm) of precipitation is accumulated.Snowfall
January through March, November and December are months with snowfall. In Rollingbay, in January, snow falls for 2 days, with typically accumulated 0.87" (22mm) of snow. Throughout the year, there are 8.7 snowfall days, and 4.25" (108mm) of snow is accumulated.Daylight
The average length of the day in January is 8h and 57min.On the first day of January, sunrise is at 7:58 am and sunset at 4:28 pm. On the last day of the month, sunrise is at 7:38 am and sunset at 5:08 pm PST.
Sunshine
In January, the average sunshine is 4.5h.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 of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for average individuals.Note: In January, the maximum UV index of 2 translates into these guidelines:
Children necessitate constant protection from sunlight, unlike the majority, who can remain under the sun for about an hour without burning. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in January?
What are the most humid months?
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 Rollingbay have in January?
What time are sunrise and sunset in January?
How many hours of sunshine does Rollingbay have in January?
What is the month with the lowest UV index?
What is the UV index reading in January?
Average temperature in January
Rollingbay, WA
- Average high temperature in January: 45.3°F
The warmest month (with the highest average high temperature) is August (75.4°F).
The month with the lowest average high temperature is December (43.5°F).
- Average low temperature in January: 37°F
The month with the highest average low temperature is August (55°F).
The coldest month (with the lowest average low temperature) is December (36.3°F).
Average pressure in January
Rollingbay, WA
- Average pressure in January: 30.09"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The months with the lowest atmospheric pressure are March, August and September (30.01"Hg).
Average wind speed in January
Rollingbay, WA
- Average wind speed in January: 5.7mph
The windiest month (with the highest average wind speed) is March (6.1mph).
The calmest months (with the lowest average wind speed) are July and August (3.7mph).
Average humidity in January
Rollingbay, WA
- Average humidity in January: 85%
The months with the highest relative humidity are January and December (85%).
The months with the lowest relative humidity are July and August (71%).
Average rainfall in January
Rollingbay, WA
- Average rainfall in January: 3.54"
The wettest month (with the highest rainfall) is December (3.58").
The driest month (with the least rainfall) is July (0.35").
Average rainfall days in January
Rollingbay, WA
- Average rainfall days in January: 17 days
The month with the highest number of rainy days is March (19.9 days).
The month with the least rainy days is August (5.9 days).
Average snowfall in January
Rollingbay, WA
- Average snowfall in January: 0.87"
The month with the highest snowfall is February (2.32").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in January
Rollingbay, WA
- Average snowfall days in January: 2 days
The month with the highest number of snowfall days is February (3.1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in January /
Average sunshine in January
Rollingbay, WA
- Average daylight in January: 9h and 0min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in January: 4h and 3min
The month with the most sunshine is August (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 4h and 18min).
Average sunshine days in January
Rollingbay, WA
- Average sunshine days in January: 10.9 days
The month with the most sunshine days is August (22.9 days).
The month with the least sunshine days is November (9.2 days).
Average UV index in January
Rollingbay, WA
- Average UV index in January: 2
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in January
Rollingbay, WA
- Average cloud cover in January: 54
The month with the most cloud cover is December (Cloud cover 55).
The month with the least cloud cover is August (Cloud cover 26).
Average visibility in January
Rollingbay, 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).
Rollingbay, Washington, USA
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