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, February and December are characterised by lowest temperatures, with an average high of 45.3°F (7.4°C).Humidity
January, August and September, with an average relative humidity of 79%, are the most humid months.Rainfall
In January, in Roche Harbor, the rain falls for 17.3 days. Throughout January, 3.15" (80mm) of precipitation is accumulated. Throughout the year, there are 167.7 rainfall days, and 23.46" (596mm) of precipitation is accumulated.Snowfall
January through March, November and December are months with snowfall. In Roche Harbor, in January, snow falls for 1.5 days, with typically accumulated 0.83" (21mm) of snow. In Roche Harbor, during the entire year, snow falls for 6.9 days and aggregates up to 3.43" (87mm) of snow.Daylight
The average length of the day in January is 8h and 50min.On the first day of the month, sunrise is at 8:04 am and sunset at 4:27 pm. On the last day of January, sunrise is at 7:43 am and sunset at 5:08 pm PST.
Sunshine
In Roche Harbor, the average sunshine in January is 4.2h.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 estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for average individuals.Note: The UV index of 2 during January leads to these advisories:
Babies, children, and individuals with sensitive skin should always have protection against extended sun exposure. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the coldest months?
What is the usual temperature for Roche Harbor in January?
What is the most humid month?
What is the average humidity in January?
How many days does it rain in January in Roche Harbor?
How much does it snow in January?
How many hours of daylight does Roche Harbor have in January?
When are sunrise and sunset in January?
How long on average sun shines in January in Roche Harbor?
When is the lowest UV index?
What is the UV index intensity in January?
Average temperature in January
Roche Harbor, WA
- Average high temperature in January: 45.3°F
The warmest month (with the highest average high temperature) is July (64.9°F).
The months with the lowest average high temperature are January, February and December (45.3°F).
- Average low temperature in January: 41°F
The month with the highest average low temperature is August (57.7°F).
The coldest month (with the lowest average low temperature) is February (40.5°F).
Average pressure in January
Roche Harbor, WA
- Average pressure in January: 30.07"Hg
The month with the highest atmospheric pressure is January (30.07"Hg).
The month with the lowest atmospheric pressure is March (30"Hg).
Average wind speed in January
Roche Harbor, WA
- Average wind speed in January: 9.7mph
The windiest month (with the highest average wind speed) is November (10.7mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).
Average humidity in January
Roche Harbor, WA
- Average humidity in January: 79%
The months with the highest relative humidity are January, August and September (79%).
The month with the lowest relative humidity is April (76%).
Average rainfall in January
Roche Harbor, WA
- Average rainfall in January: 3.15"
The wettest month (with the highest rainfall) is November (3.43").
The driest month (with the least rainfall) is July (0.43").
Average rainfall days in January
Roche Harbor, WA
- Average rainfall days in January: 17.3 days
The month with the highest number of rainy days is March (20.2 days).
The month with the least rainy days is August (5.3 days).
Average snowfall in January
Roche Harbor, WA
- Average snowfall in January: 0.83"
The month with the highest snowfall is February (1.77").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in January
Roche Harbor, WA
- Average snowfall days in January: 1.5 days
The month with the highest number of snowfall days is February (2.7 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
Roche Harbor, WA
- Average daylight in January: 8h and 5min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in January: 4h and 1min
The month with the most sunshine is July (Average sunshine: 11h and 6min).
The month with the least sunshine is December (Average sunshine: 4h and 6min).
Average sunshine days in January
Roche Harbor, WA
- Average sunshine days in January: 10.8 days
The month with the most sunshine days is August (24.7 days).
The month with the least sunshine days is November (8.7 days).
Average UV index in January
Roche Harbor, WA
- Average UV index in January: 2
The month with the highest UV index is 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
Roche Harbor, WA
- Average cloud cover in January: 55
The months with the most cloud cover are February and December (Cloud cover 56).
The months with the least cloud cover are July and August (Cloud cover 23).
Average visibility in January
Roche Harbor, 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).
Roche Harbor, Washington, USA
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