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
With the start of January, Rosalia measures an average high-temperature of a still wintry 34.5°F (1.4°C), not significantly differing from December's 33.1°F (0.6°C). Throughout January, an average low-temperature of 24.6°F (-4.1°C) is expected.Humidity
With an average relative humidity of 87%, January is the most humid month.Rainfall
The wettest months are January and May, with an average 0.91" (23mm) of rainfall.Snowfall
Months with snowfall are January through May, September, November and December. In January, it is snowing for 7.4 days. Throughout January, 3.7" (94mm) of snow is accumulated. In Rosalia, during the entire year, snow falls for 32.5 days and aggregates up to 14.09" (358mm) of snow.Daylight
In January, the average length of the day in Rosalia, Washington, is 9h and 0min.On the first day of January, sunrise is at 7:36 am and sunset at 4:09 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 4:49 pm PST.
Sunshine
In Rosalia, the average sunshine in January 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 value of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: A maximum high UV index of 2 in January translates into the following recommendations:
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. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Take to heart! Snow reflection can almost magnify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How cold is it in January?
What is the most humid month in Rosalia?
What is the average humidity in January?
What is the rainiest month?
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?
How long on average sun shines in January in Rosalia?
When is the lowest UV index?
How high is the UV index in January?
Average temperature in January
Rosalia, WA
- Average high temperature in January: 34.5°F
The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is December (33.1°F).
- Average low temperature in January: 24.6°F
The month with the highest average low temperature is August (61.3°F).
The coldest month (with the lowest average low temperature) is December (23.9°F).
Average pressure in January
Rosalia, 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 (29.9"Hg).
Average wind speed in January
Rosalia, WA
- Average wind speed in January: 7.4mph
The windiest month (with the highest average wind speed) is March (8.8mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).
Average humidity in January
Rosalia, WA
- Average humidity in January: 87%
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is August (36%).
Average rainfall in January
Rosalia, WA
- Average rainfall in January: 0.91"
The wettest months (with the highest rainfall) are January and May (0.91").
The driest month (with the least rainfall) is July (0.16").
Average rainfall days in January
Rosalia, WA
- Average rainfall days in January: 7.6 days
The month with the highest number of rainy days is March (10.1 days).
The month with the least rainy days is July (3.5 days).
Average snowfall in January
Rosalia, WA
- Average snowfall in January: 3.7"
The month with the highest snowfall is February (3.82").
The months with the least snowfall are June, July, August and October (0").
Average snowfall days in January
Rosalia, WA
- Average snowfall days in January: 7.4 days
The month with the highest number of snowfall days is December (9.3 days).
The months with the least snowfall days are June, July, August and October (0 days).
Average daylight in January /
Average sunshine in January
Rosalia, 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 36min).
- Average sunshine in January: 4h and 3min
The month with the most sunshine is August (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 4h and 18min).
Average sunshine days in January
Rosalia, WA
- Average sunshine days in January: 17.5 days
The month with the most sunshine days is July (26.6 days).
The month with the least sunshine days is February (15.9 days).
Average UV index in January
Rosalia, 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
Rosalia, WA
- Average cloud cover in January: 55
The months with the most cloud cover are January and December (Cloud cover 55).
The month with the least cloud cover is July (Cloud cover 11).
Average visibility in January
Rosalia, 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).
Rosalia, Washington, USA
Weather forecast for your location
2. Allow the app to use your location