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
December's transformation into January witnesses an average high-temperature of a still chilly 48.7°F (9.3°C), noting a minor change from the preceding month. Night temperatures in January exhibit a subtle decrease, settling at an average of 41.5°F (5.3°C).Humidity
The average relative humidity in January is 82%.Rainfall
In Siletz, in January, during 14.8 rainfall days, 2.72" (69mm) of precipitation is typically accumulated. Throughout the year, there are 139.5 rainfall days, and 18.66" (474mm) of precipitation is accumulated.Snowfall
January, February and November are months with snowfall. January is the first month it typically snows. Throughout January, in the average 0.3 snowfall days, it receives 0.16" (4mm) of snow. Throughout the year, there are 1.6 snowfall days, and 0.47" (12mm) of snow is accumulated.Daylight
The average length of the day in January is 9h and 16min.On the first day of January, sunrise is at 7:52 am and sunset at 4:45 pm. On the last day of the month, sunrise is at 7:35 am and sunset at 5:22 pm PST.
Sunshine
January and February, with an average of 4h of sunshine, are months with the least sunshine.UV index
In January, the average daily maximum UV index is 3. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: In January, the maximum UV index of 3 translates into these guidelines:
Exercise prevention - Protecting skin and eyes from harm is required. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Take note! UV radiation from the Sun can double in intensity 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 is the average humidity in January?
How much does it rain in January?
When does it start snowing?
What is the average length of the day in January?
When are sunrise and sunset in January?
What are the months with the least sunshine?
How many hours of sunshine does Siletz have in January?
What is the UV index reading in January?
Average temperature in January
Siletz, OR
- Average high temperature in January: 48.7°F
The warmest month (with the highest average high temperature) is August (67.6°F).
The month with the lowest average high temperature is December (47.7°F).
- Average low temperature in January: 41.5°F
The month with the highest average low temperature is August (53.6°F).
The coldest month (with the lowest average low temperature) is December (40.6°F).
Average pressure in January
Siletz, OR
- Average pressure in January: 30.09"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is September (30.02"Hg).
Average wind speed in January
Siletz, OR
- Average wind speed in January: 9.8mph
The windiest month (with the highest average wind speed) is January (9.8mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in January
Siletz, OR
- Average humidity in January: 82%
The months with the highest relative humidity are February, March, November and December (83%).
The months with the lowest relative humidity are April, May, July, September and October (81%).
Average rainfall in January
Siletz, OR
- Average rainfall in January: 2.72"
The wettest month (with the highest rainfall) is December (3.07").
The driest month (with the least rainfall) is July (0.16").
Average rainfall days in January
Siletz, OR
- Average rainfall days in January: 14.8 days
The month with the highest number of rainy days is March (18.2 days).
The month with the least rainy days is August (3.7 days).
Average snowfall in January
Siletz, OR
- Average snowfall in January: 0.16"
The month with the highest snowfall is February (0.28").
The months with the least snowfall are March, April, May, June, July, August, September, October and December (0").
Average snowfall days in January
Siletz, OR
- Average snowfall days in January: 0.3 days
The month with the highest number of snowfall days is February (0.9 days).
The months with the least snowfall days are March, April, May, June, July, August, September and October (0 days).
Average daylight in January /
Average sunshine in January
Siletz, OR
- Average daylight in January: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in January: 4h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The months with the least sunshine are January and February (Average sunshine: 4h and 0min).
Average sunshine days in January
Siletz, OR
- Average sunshine days in January: 14 days
The month with the most sunshine days is July (25.8 days).
The month with the least sunshine days is March (10.9 days).
Average UV index in January
Siletz, OR
- Average UV index in January: 3
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are February, November and December (UV index 2).
Average cloud cover in January
Siletz, OR
- Average cloud cover in January: 58
The months with the most cloud cover are February and March (Cloud cover 59).
The month with the least cloud cover is July (Cloud cover 29).
Average visibility in January
Siletz, OR
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, October, November and December (6mi).
The months with the lowest visibility are August and September (5mi).
Siletz, Oregon, USA
Weather forecast for your location
2. Allow the app to use your location