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
Arcata's January average high-temperature settles at a still fresh 53.6°F (12°C), showing a near match with the preceding month. Arcata cools down to an average low-temperature of 43°F (6.1°C) throughout the month of January.Humidity
In January, the average relative humidity in Arcata is 79%.Rainfall
In Arcata, in January, during 14.8 rainfall days, 4.72" (120mm) of precipitation is typically accumulated. Throughout the year, in Arcata, there are 114.7 rainfall days, and 29.37" (746mm) of precipitation is accumulated.Snowfall
January, March through December are months without snowfall.Daylight
The average length of the day in January is 9h and 38min.On the first day of January, sunrise is at 7:40 am and sunset at 4:58 pm. On the last day of the month, sunrise is at 7:27 am and sunset at 5:31 pm PST.
Sunshine
In Arcata, California, the average sunshine in January is 5.3h.UV index
The months with the lowest UV index in Arcata, California, are January through March, November and December, with an average maximum UV index of 3. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for average individuals.Note: In January, a daily UV index of 3 turns into the following recommendations:
Undertake precautions - Obligation exists to protect against skin and eye damage. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Arcata in January?
What is the average humidity in January in Arcata?
How much does it rain in Arcata in January?
When it does not snow in Arcata?
Does it snow in Arcata in January?
How many hours of daylight does Arcata have in January?
When is the sunrise / sunset in January in Arcata?
How long on average sun shines in January in Arcata?
What is the month with the lowest UV index in Arcata?
What is the UV index reading in January in Arcata?
Average temperature in January
Arcata, CA
- Average high temperature in January: 53.6°F
The warmest month (with the highest average high temperature) is August (69.6°F).
The month with the lowest average high temperature is December (52.7°F).
- Average low temperature in January: 43°F
The month with the highest average low temperature is August (52.3°F).
The coldest month (with the lowest average low temperature) is February (41.9°F).
Average pressure in January
Arcata, CA
- Average pressure in January: 30.13"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is August (29.96"Hg).
Average wind speed in January
Arcata, CA
- Average wind speed in January: 7.4mph
The windiest month (with the highest average wind speed) is March (8.4mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in January
Arcata, CA
- Average humidity in January: 79%
The month with the highest relative humidity is March (82%).
The month with the lowest relative humidity is October (75%).
Average rainfall in January
Arcata, CA
- Average rainfall in January: 4.72"
The wettest month (with the highest rainfall) is December (5.31").
The driest month (with the least rainfall) is July (0.12").
Average rainfall days in January
Arcata, CA
- Average rainfall days in January: 14.8 days
The month with the highest number of rainy days is March (17.5 days).
The month with the least rainy days is August (2.1 days).
Average snowfall in January
Arcata, CA
- Average snowfall in January: 0"
The month with the highest snowfall is February (0.39").
The months with the least snowfall are January, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in January
Arcata, CA
- Average snowfall days in January: 0 days
The month with the highest number of snowfall days is February (0.3 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in January /
Average sunshine in January
Arcata, CA
- Average daylight in January: 9h and 4min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in January: 5h and 2min
The month with the most sunshine is July (Average sunshine: 11h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 12min).
Average sunshine days in January
Arcata, CA
- Average sunshine days in January: 15.3 days
The month with the most sunshine days is July (28.3 days).
The month with the least sunshine days is March (12.1 days).
Average UV index in January
Arcata, CA
- 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 January, February, March, November and December (UV index 3).
Average cloud cover in January
Arcata, CA
- Average cloud cover in January: 43
The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 16).
Average visibility in January
Arcata, CA
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, September, October, November and December (6mi).
The month with the lowest visibility is August (5mi).
Arcata, California, USA
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