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 sea temperature 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 transition into January shows a subtle variation to a still chilly 45°F (7.2°C) from December's 43.2°F (6.2°C) in the average high-temperature. Recording a slight decline in temperature during the nights, Olalla's January temperatures average at an icy 36.1°F (2.3°C).Humidity
In January, the average relative humidity in Olalla is 86%.Rainfall
The wettest months are January and December, with an average 2.05" (52mm) of rainfall.Snowfall
January through March, November and December are months with snowfall in Olalla. In Olalla, in January, during 1.7 snowfall days, 0.63" (16mm) of snow is typically accumulated. Throughout the year, there are 7 snowfall days, and 2.36" (60mm) of snow is accumulated.Ocean temperature
In January, the average ocean temperature in Olalla is 46°F (7.8°C).Note: Swimming in 46°F (7.8°C) at temperatures under 50°F (10°C) requires thermal swimsuits; otherwise, one can face cold shock and breathing difficulty. Even brief immersion at 55.4°F (13°C) feels frosty.
Daylight
In January, the average length of the day in Olalla is 8h and 59min.On the first day of the month, sunrise is at 7:57 am and sunset at 4:29 pm. On the last day of January, sunrise is at 7:37 am and sunset at 5:09 pm PST.
Sunshine
In Olalla, Washington, 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 in Olalla. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: In January, the UV index of 2 transforms into the following advice:
Despite most people tolerating extended sun exposure, it is critical to always protect those with sensitive skin, infants, and children. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average January temperature in Olalla?
What is the average humidity in January in Olalla?
What is the wettest month in Olalla?
How much does it rain in Olalla in January?
How many days does it snow in January in Olalla?
What is the ocean temperature in January in Olalla?
What is the average length of the day in January in Olalla?
When is the sunrise / sunset in January in Olalla?
How long on average sun shines in January in Olalla?
What is the month with the lowest UV index in Olalla?
What is the UV index reading in January in Olalla?
Average temperature in January
Olalla, WA
- Average high temperature in January: 45°F
The warmest month (with the highest average high temperature) is August (77.2°F).
The month with the lowest average high temperature is December (43.2°F).
- Average low temperature in January: 36.1°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 (34.9°F).
Average pressure in January
Olalla, 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
Olalla, WA
- Average wind speed in January: 5.1mph
The windiest month (with the highest average wind speed) is March (5.5mph).
The calmest months (with the lowest average wind speed) are July and August (3.5mph).
Average humidity in January
Olalla, WA
- Average humidity in January: 86%
The month with the highest relative humidity is December (87%).
The month with the lowest relative humidity is July (69%).
Average rainfall in January
Olalla, WA
- Average rainfall in January: 2.05"
The wettest months (with the highest rainfall) are January and December (2.05").
The driest month (with the least rainfall) is July (0.28").
Average rainfall days in January
Olalla, WA
- Average rainfall days in January: 13.4 days
The month with the highest number of rainy days is March (15.3 days).
The month with the least rainy days is August (5.4 days).
Average snowfall in January
Olalla, WA
- Average snowfall in January: 0.63"
The month with the highest snowfall is February (1.22").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in January
Olalla, WA
- Average snowfall days in January: 1.7 days
The month with the highest number of snowfall days is February (2.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in January
Olalla, WA
- Average sea temperature in January: 46°F
The best month for swimming (with the highest average sea temperature) is August (53.3°F).
The coldest month (with the lowest average sea temperature) is February (45.8°F).
Average daylight in January /
Average sunshine in January
Olalla, 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 1min
The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 4h and 6min).
Average sunshine days in January
Olalla, WA
- Average sunshine days in January: 14.9 days
The month with the most sunshine days is August (22.8 days).
The month with the least sunshine days is February (11.8 days).
Average UV index in January
Olalla, 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
Olalla, WA
- Average cloud cover in January: 57
The month with the most cloud cover is December (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility in January
Olalla, WA
- Average visibility in January: 5mi
The months with the highest visibility are May, June, July, August and September (6mi).
The months with the lowest visibility are January, February, March, April, October, November and December (5mi).
Olalla, Washington, USA
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