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 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 average high-temperature is a still comfortable 65.5°F (18.6°C) in January, hardly different from the 63.9°F (17.7°C) recorded in December. During January, the temperature tends to dip to an average of 51.4°F (10.8°C) at night.Humidity
The average relative humidity in January is 55%.Rainfall
The month with the most rainfall is January, when the rain falls for 5.4 days and typically aggregates up to 1.54" (39mm) of precipitation.Ocean temperature
January through May and December, with an average ocean temperature of 59°F (15°C), are months with the coldest seawater.Note: The majority of people do not enjoy swimming in 59°F (15°C). The difficulty in controlling breathing escalates as the temperature descends from 69.8°F (21°C) to 59°F (15°C).
Daylight
In Santa Monica, the average length of the day in January is 10h and 11min.On the first day of January, sunrise is at 6:59 am and sunset at 4:55 pm. On the last day of the month, sunrise is at 6:51 am and sunset at 5:23 pm PST.
Sunshine
The average sunshine in January is 6.7h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: The daily high UV index of 4 during January translates into the following recommendations:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
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?
What is the rainiest month?
How many days does it rain in January?
What months are the ocean coldest?
What is the ocean temperature in January?
How many hours of daylight does Santa Monica have in January?
When are sunrise and sunset in January?
How long on average sun shines in January?
When is the lowest UV index?
What is the UV index intensity in January?
Average temperature in January
Santa Monica, CA
- Average high temperature in January: 65.5°F
The warmest month (with the highest average high temperature) is August (80.8°F).
The month with the lowest average high temperature is December (63.9°F).
- Average low temperature in January: 51.4°F
The month with the highest average low temperature is August (64.4°F).
The coldest month (with the lowest average low temperature) is February (50.5°F).
Average pressure in January
Santa Monica, CA
- Average pressure in January: 30.1"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are June and September (29.9"Hg).
Average wind speed in January
Santa Monica, CA
- Average wind speed in January: 5.8mph
The windiest month (with the highest average wind speed) is April (6.3mph).
The calmest months (with the lowest average wind speed) are August and September (4.8mph).
Average humidity in January
Santa Monica, CA
- Average humidity in January: 55%
The month with the highest relative humidity is June (69%).
The month with the lowest relative humidity is November (52%).
Average rainfall in January
Santa Monica, CA
- Average rainfall in January: 1.54"
The wettest month (with the highest rainfall) is January (1.54").
The driest months (with the least rainfall) are June and August (0.08").
Average rainfall days in January
Santa Monica, CA
- Average rainfall days in January: 5.4 days
The month with the highest number of rainy days is March (6.8 days).
The month with the least rainy days is August (1.8 days).
Average sea temperature in January
Santa Monica, CA
- Average sea temperature in January: 59°F
The best months for swimming (with the highest average sea temperature) are August, September and October (66°F).
The coldest months (with the lowest average sea temperature) are January, February, March, April, May and December (59°F).
Average daylight in January /
Average sunshine in January
Santa Monica, CA
- Average daylight in January: 10h and 1min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in January: 6h and 4min
The months with the most sunshine are July and August (Average sunshine: 11h and 54min).
The months with the least sunshine are February and December (Average sunshine: 6h and 36min).
Average sunshine days in January
Santa Monica, CA
- Average sunshine days in January: 24.7 days
The month with the most sunshine days is August (27.9 days).
The month with the least sunshine days is February (21.8 days).
Average UV index in January
Santa Monica, CA
- Average UV index in January: 4
The months with the highest UV index are June, July, August and September (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 4).
Average cloud cover in January
Santa Monica, CA
- Average cloud cover in January: 22
The months with the most cloud cover are March and December (Cloud cover 23).
The month with the least cloud cover is August (Cloud cover 8).
Average visibility in January
Santa Monica, CA
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Santa Monica, California, USA
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