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 arrival of January brings an average high-temperature of a still chilly 45.5°F (7.5°C), subtly diverging from December's 43.7°F (6.5°C). An average minimum temperature of 35.2°F (1.8°C) is recorded during the month of January.Humidity
January and December, with an average relative humidity of 87%, are the most humid months.Rainfall
In January, the rain falls for 18.3 days. Throughout January, 4.53" (115mm) of precipitation is accumulated. In Steilacoom, during the entire year, the rain falls for 172.9 days and collects up to 30.08" (764mm) of precipitation.Snowfall
January through March, November and December are months with snowfall in Steilacoom. In Steilacoom, during January, snow falls for 1.9 days and regularly aggregates up to 1.26" (32mm) of snow. Throughout the year, there are 8.9 snowfall days, and 5.04" (128mm) of snow is accumulated.Daylight
The average length of the day in January is 9h and 1min.On the first day of January, sunrise is at 7:56 am and sunset at 4:31 pm. On the last day of the month, sunrise is at 7:36 am and sunset at 5:10 pm PST.
Sunshine
In January, the average sunshine 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 of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: An average maximum UV index of 2 in January leads to these recommendations:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Consider carefully! The reflective quality of snow 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 temperatures in January?
What is the most humid month?
What is the average humidity in January?
How much does it rain in January?
How much does it snow in Steilacoom in January?
What is the average length of the day in January?
When is the sunrise / sunset in January?
How many hours of sunshine does Steilacoom have in January?
When is the lowest UV index?
What is the UV index intensity in January?
Average temperature in January
Steilacoom, WA
- Average high temperature in January: 45.5°F
The warmest month (with the highest average high temperature) is August (78.1°F).
The month with the lowest average high temperature is December (43.7°F).
- Average low temperature in January: 35.2°F
The month with the highest average low temperature is August (52.7°F).
The coldest months (with the lowest average low temperature) are February and December (34.3°F).
Average pressure in January
Steilacoom, 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
Steilacoom, WA
- Average wind speed in January: 5mph
The windiest month (with the highest average wind speed) is March (5.2mph).
The calmest month (with the lowest average wind speed) is August (3.7mph).
Average humidity in January
Steilacoom, WA
- Average humidity in January: 87%
The months with the highest relative humidity are January and December (87%).
The month with the lowest relative humidity is July (68%).
Average rainfall in January
Steilacoom, WA
- Average rainfall in January: 4.53"
The wettest month (with the highest rainfall) is December (4.69").
The driest month (with the least rainfall) is July (0.39").
Average rainfall days in January
Steilacoom, WA
- Average rainfall days in January: 18.3 days
The month with the highest number of rainy days is March (20.1 days).
The month with the least rainy days is August (5 days).
Average snowfall in January
Steilacoom, WA
- Average snowfall in January: 1.26"
The month with the highest snowfall is February (2.28").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in January
Steilacoom, WA
- Average snowfall days in January: 1.9 days
The month with the highest number of snowfall days is February (3.2 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
Steilacoom, 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 1min
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 0min).
Average sunshine days in January
Steilacoom, WA
- Average sunshine days in January: 10.8 days
The month with the most sunshine days is August (23.4 days).
The month with the least sunshine days is February (9 days).
Average UV index in January
Steilacoom, WA
- Average UV index in January: 2
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in January
Steilacoom, WA
- Average cloud cover in January: 58
The month with the most cloud cover is December (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in January
Steilacoom, WA
- Average visibility in January: 5mi
The months with the highest visibility are June, July and August (6mi).
The months with the lowest visibility are January, February, March, April, May, September, October, November and December (5mi).
Steilacoom, Washington, USA
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