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 advent of January signifies a minor shift to an average high-temperature of a still chilly 46°F (7.8°C), aligning closely with December. Astoria encounters an average temperature dip to a cold 39.2°F (4°C) throughout January, subtly lower than its daytime maximum.Humidity
January through March, November and December, with an average relative humidity of 84%, are the most humid months.Rainfall
In January, the rain falls for 20.1 days. Throughout January, 6.22" (158mm) of precipitation is accumulated. Throughout the year, there are 192.7 rainfall days, and 40.12" (1019mm) of precipitation is accumulated.Snowfall
January through March and December are months with snowfall. In Astoria, in January, during 0.9 snowfall days, 0.75" (19mm) of snow is typically accumulated. In Astoria, during the entire year, snow falls for 3.4 days and aggregates up to 1.93" (49mm) of snow.Ocean temperature
In Astoria, in January, the average water temperature is 48.4°F (9.1°C).Note: Swimming in 48.4°F (9.1°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 is 9h and 7min.On the first day of January, sunrise is at 7:57 am and sunset at 4:39 pm. On the last day of the month, sunrise is at 7:39 am and sunset at 5:18 pm PST.
Sunshine
The months with the least sunshine are January and February, with an average of 3.8h of sunshine.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 low health risk from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum UV index, 2 during January, leads to the following recommendations:
Although prolonged sun exposure does not typically bother most people, children, babies, and those with sensitive skin should always have protection. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Astoria in January?
What are the most humid months?
What is the average humidity in January?
How many days does it rain in January?
How much does it snow in January?
What is the water temperature in January?
What is the average length of the day in January?
When is the sunrise / sunset in January?
What are the months with the least sunshine?
How long on average sun shines in January?
When is the lowest UV index?
What is the UV index reading in January?
Average temperature in January
Astoria, OR
- Average high temperature in January: 46°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 (45.1°F).
- Average low temperature in January: 39.2°F
The month with the highest average low temperature is August (53.1°F).
The coldest month (with the lowest average low temperature) is December (38.5°F).
Average pressure in January
Astoria, OR
- Average pressure in January: 30.08"Hg
The month with the highest atmospheric pressure is January (30.08"Hg).
The months with the lowest atmospheric pressure are March and September (30.02"Hg).
Average wind speed in January
Astoria, OR
- Average wind speed in January: 9.1mph
The windiest month (with the highest average wind speed) is January (9.1mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in January
Astoria, OR
- Average humidity in January: 84%
The months with the highest relative humidity are January, February, March, November and December (84%).
The month with the lowest relative humidity is May (81%).
Average rainfall in January
Astoria, OR
- Average rainfall in January: 6.22"
The wettest month (with the highest rainfall) is December (6.42").
The driest month (with the least rainfall) is July (0.51").
Average rainfall days in January
Astoria, OR
- Average rainfall days in January: 20.1 days
The month with the highest number of rainy days is December (21.2 days).
The month with the least rainy days is August (7.2 days).
Average snowfall in January
Astoria, OR
- Average snowfall in January: 0.75"
The month with the highest snowfall is February (0.91").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in January
Astoria, OR
- Average snowfall days in January: 0.9 days
The month with the highest number of snowfall days is February (1.4 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average sea temperature in January
Astoria, OR
- Average sea temperature in January: 48.5°F
The best month for swimming (with the highest average sea temperature) is July (56.9°F).
The coldest month (with the lowest average sea temperature) is February (47.7°F).
Average daylight in January /
Average sunshine in January
Astoria, OR
- Average daylight in January: 9h and 1min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in January: 3h and 5min
The month with the most sunshine is August (Average sunshine: 9h and 54min).
The months with the least sunshine are January and February (Average sunshine: 3h and 48min).
Average sunshine days in January
Astoria, OR
- Average sunshine days in January: 9.8 days
The month with the most sunshine days is August (20.1 days).
The month with the least sunshine days is February (7.5 days).
Average UV index in January
Astoria, OR
- 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
Astoria, OR
- Average cloud cover in January: 60
The months with the most cloud cover are January and February (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 36).
Average visibility in January
Astoria, OR
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are July, August and September (5mi).
Astoria, Oregon, USA
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