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 for January is a still comfortable 64.9°F (18.3°C), closely aligning with the temperature of the preceding month. During the nights in January, an average low-temperature of 51.4°F (10.8°C) is observed.Humidity
The average relative humidity in January is 59%.Rainfall
In La Jolla, in January, during 5.2 rainfall days, 0.91" (23mm) of precipitation is typically accumulated. Throughout the year, there are 57.9 rainfall days, and 7.48" (190mm) of precipitation is accumulated.Ocean temperature
In La Jolla, in January, the average water temperature is 59.4°F (15.2°C).Note: For most individuals, swimming in 59.4°F (15.2°C) is not a pleasant experience. The difficulty in managing breathing increases as the temperature decreases from 69.8°F (21°C) to 59°F (15°C).
Daylight
The average length of the day in January is 10h and 17min.On the first day of January in La Jolla, sunrise is at 6:51 am and sunset at 4:53 pm. On the last day of the month, sunrise is at 6:44 am and sunset at 5:20 pm PST.
Sunshine
The average sunshine in January is 6.9h.UV index
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the average person.Note: In January, a daily UV index of 4 turns into the following recommendations:
Undertake protective steps - Obligation to safeguard skin and eyes from harm is in place. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the 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?
How many days does it rain in January?
How cold is the water in January?
How many hours of daylight does La Jolla have in January?
What time are sunrise and sunset in January?
How many hours of sunshine does La Jolla have in January?
What is the month with the lowest UV index?
What is the UV index intensity in January?
Average temperature in January
La Jolla, CA
- Average high temperature in January: 64.9°F
The warmest month (with the highest average high temperature) is August (79.3°F).
The month with the lowest average high temperature is December (63.5°F).
- Average low temperature in January: 51.4°F
The month with the highest average low temperature is August (65.8°F).
The coldest month (with the lowest average low temperature) is February (50.2°F).
Average pressure in January
La Jolla, CA
- 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 June and September (29.88"Hg).
Average wind speed in January
La Jolla, CA
- Average wind speed in January: 5.1mph
The windiest month (with the highest average wind speed) is April (6mph).
The calmest month (with the lowest average wind speed) is October (4.8mph).
Average humidity in January
La Jolla, CA
- Average humidity in January: 59%
The months with the highest relative humidity are May and June (71%).
The month with the lowest relative humidity is November (57%).
Average rainfall in January
La Jolla, CA
- Average rainfall in January: 0.91"
The wettest month (with the highest rainfall) is February (1.46").
The driest month (with the least rainfall) is June (0.12").
Average rainfall days in January
La Jolla, CA
- Average rainfall days in January: 5.2 days
The month with the highest number of rainy days is March (7.1 days).
The month with the least rainy days is June (2.2 days).
Average sea temperature in January
La Jolla, CA
- Average sea temperature in January: 59.2°F
The best month for swimming (with the highest average sea temperature) is August (67.9°F).
The coldest month (with the lowest average sea temperature) is February (58.7°F).
Average daylight in January /
Average sunshine in January
La Jolla, CA
- Average daylight in January: 10h and 2min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in January: 6h and 5min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 48min).
Average sunshine days in January
La Jolla, CA
- Average sunshine days in January: 24.8 days
The month with the most sunshine days is January (24.8 days).
The month with the least sunshine days is February (20.2 days).
Average UV index in January
La Jolla, CA
- Average UV index in January: 4
The months with the highest UV index are July, August and September (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 4).
Average cloud cover in January
La Jolla, CA
- Average cloud cover in January: 20
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
La Jolla, 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).
La Jolla, California, USA
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