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
Rancho San Diego marks the onset of January with an average high-temperature of a still enjoyable 65.8°F (18.8°C), subtly divergent from December's 63.7°F (17.6°C). Throughout the month of January, the nighttime temperature dips to an average of 48.4°F (9.1°C).Humidity
In Rancho San Diego, the average relative humidity in January is 55%.Rainfall
In January, in Rancho San Diego, the rain falls for 5.2 days. Throughout January, 1.1" (28mm) of precipitation is accumulated. In Rancho San Diego, California, during the entire year, the rain falls for 56.1 days and collects up to 8.27" (210mm) of precipitation.Daylight
In Rancho San Diego, the average length of the day in January is 10h and 17min.On the first day of January in Rancho San Diego, sunrise is at 6:49 am and sunset at 4:52 pm. On the last day of the month, sunrise is at 6:43 am and sunset at 5:19 pm PST.
Sunshine
The average sunshine in January is 6.9h.UV index
January, February, November and December, with an average maximum UV index of 4, are months with the lowest UV index in Rancho San Diego. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for average individuals.Note: The daily high UV index of 4 in January translates into this advice:
Be vigilant - Preventing sunburn is recommended. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average January temperature in Rancho San Diego?
What is the average humidity in January in Rancho San Diego?
How much does it rain in Rancho San Diego in January?
How many hours of daylight does Rancho San Diego have in January?
What time are sunrise and sunset in January in Rancho San Diego?
How long on average sun shines in January in Rancho San Diego?
When is the lowest UV index in Rancho San Diego?
How high is the UV index in January in Rancho San Diego?
Average temperature in January
Rancho San Diego, CA
- Average high temperature in January: 65.8°F
The warmest month (with the highest average high temperature) is August (83.8°F).
The month with the lowest average high temperature is December (63.7°F).
- Average low temperature in January: 48.4°F
The month with the highest average low temperature is August (65.8°F).
The coldest month (with the lowest average low temperature) is December (47.8°F).
Average pressure in January
Rancho San Diego, 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 (29.87"Hg).
Average wind speed in January
Rancho San Diego, CA
- Average wind speed in January: 4.8mph
The windiest month (with the highest average wind speed) is April (5.5mph).
The calmest month (with the lowest average wind speed) is October (4.3mph).
Average humidity in January
Rancho San Diego, CA
- Average humidity in January: 55%
The month with the highest relative humidity is May (66%).
The month with the lowest relative humidity is November (53%).
Average rainfall in January
Rancho San Diego, CA
- Average rainfall in January: 1.1"
The wettest month (with the highest rainfall) is February (1.81").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in January
Rancho San Diego, CA
- Average rainfall days in January: 5.2 days
The month with the highest number of rainy days is March (7.7 days).
The month with the least rainy days is June (1.4 days).
Average daylight in January /
Average sunshine in January
Rancho San Diego, 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 6min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).
Average sunshine days in January
Rancho San Diego, CA
- Average sunshine days in January: 25.4 days
The month with the most sunshine days is June (27.7 days).
The month with the least sunshine days is February (21.9 days).
Average UV index in January
Rancho San Diego, 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
Rancho San Diego, 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 7).
Average visibility in January
Rancho San Diego, 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).
Rancho San Diego, California, USA
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