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 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 commencement of January brings an average high-temperature of a still refreshing 64°F (17.8°C), marking an inconsequential divergence from December. During January, San Luis Rey witnesses a consistent average low-temperature of 50.7°F (10.4°C).Humidity
In January, the average relative humidity is 61%.Rainfall
In San Luis Rey, during January, the rain falls for 6 days and regularly aggregates up to 1.26" (32mm) of precipitation. Throughout the year, there are 68.2 rainfall days, and 9.49" (241mm) of precipitation is accumulated.Daylight
In San Luis Rey, the average length of the day in January is 10h and 15min.On the first day of the month, sunrise is at 6:52 am and sunset at 4:52 pm. On the last day of January, sunrise is at 6:45 am and sunset at 5:19 pm PST.
Sunshine
In San Luis Rey, the average sunshine in January is 6.8h.UV index
The months with the lowest UV index in San Luis Rey are January through March, November and December, with an average maximum UV index of 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 4 in January interprets into the following recommendations:
Undertake precautions - Guarding against sun damage is counselled. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are January temperatures?
What is the average humidity in January?
How many days does it rain in January?
How many hours of daylight does San Luis Rey have in January?
When is the sunrise / sunset in January?
How many hours of sunshine does San Luis Rey have in January?
What is the month with the lowest UV index?
What is the UV index reading in January?
Average temperature in January
San Luis Rey, CA
- Average high temperature in January: 64°F
The warmest month (with the highest average high temperature) is August (78.6°F).
The month with the lowest average high temperature is December (62.4°F).
- Average low temperature in January: 50.7°F
The month with the highest average low temperature is August (64.2°F).
The coldest month (with the lowest average low temperature) is February (49.6°F).
Average pressure in January
San Luis Rey, 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
San Luis Rey, CA
- Average wind speed in January: 5.1mph
The windiest months (with the highest average wind speed) are April and May (6mph).
The calmest month (with the lowest average wind speed) is October (4.8mph).
Average humidity in January
San Luis Rey, CA
- Average humidity in January: 61%
The month with the highest relative humidity is June (73%).
The month with the lowest relative humidity is November (60%).
Average rainfall in January
San Luis Rey, CA
- Average rainfall in January: 1.26"
The wettest month (with the highest rainfall) is December (1.97").
The driest month (with the least rainfall) is June (0.12").
Average rainfall days in January
San Luis Rey, CA
- Average rainfall days in January: 6 days
The month with the highest number of rainy days is March (8 days).
The month with the least rainy days is June (2.7 days).
Average daylight in January /
Average sunshine in January
San Luis Rey, 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 months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).
Average sunshine days in January
San Luis Rey, CA
- Average sunshine days in January: 23.8 days
The month with the most sunshine days is October (24.2 days).
The month with the least sunshine days is February (20 days).
Average UV index in January
San Luis Rey, 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
San Luis Rey, CA
- Average cloud cover in January: 22
The month with the most cloud cover is December (Cloud cover 25).
The month with the least cloud cover is August (Cloud cover 8).
Average visibility in January
San Luis Rey, 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).
San Luis Rey, California, USA
Weather forecast for your location
2. Allow the app to use your location