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
In San Diego, the month of January is known for its lowest average temperatures, reaching a high of 65.5°F (18.6°C) and a low of 48.7°F (9.3°C).Humidity
In San Diego, the average relative humidity in January is 67%.Rainfall
In January, the rain falls for 7 days. Throughout January, 0.63" (16mm) of precipitation is accumulated. In San Diego, during the entire year, the rain falls for 123.7 days and collects up to 15.24" (387mm) of precipitation.Snowfall
January, February and December are months with snowfall. The months with the most snowfall in San Diego are January, February and December, with an average 0.04" (1mm) of accumulated snow.Daylight
In San Diego, the average length of the day in January is 10h and 37min.On the first day of January, sunrise is at 7:23 am and sunset at 5:49 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 6:12 pm CST.
Sunshine
The average sunshine in January is 6.5h.UV index
January and December, with an average maximum UV index of 4, are months with the lowest UV index. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for average individuals.Note: The maximum UV index of 4 during January translates into these guidelines:
Preventative actions are necessary - Recommendations to ward off sunburn are given. Being in direct Sun during midday can be harmful due to intense solar radiation; 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. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest time of year in San Diego?
What is the usual temperature for San Diego in January?
What is the average humidity in January in San Diego?
How many days does it rain in January in San Diego?
What is the snowiest month in San Diego?
How many days does it snow in January in San Diego?
How many hours of daylight does San Diego have in January?
When is the sunrise / sunset in January in San Diego?
How long on average sun shines in January in San Diego?
What is the month with the lowest UV index in San Diego?
How high is the UV index in January in San Diego?
Average temperature in January
San Diego, TX
- Average high temperature in January: 65.5°F
The warmest month (with the highest average high temperature) is August (97.9°F).
The month with the lowest average high temperature is January (65.5°F).
- Average low temperature in January: 48.7°F
The month with the highest average low temperature is August (77.2°F).
The coldest month (with the lowest average low temperature) is January (48.7°F).
Average pressure in January
San Diego, TX
- Average pressure in January: 30.14"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are May and June (29.87"Hg).
Average wind speed in January
San Diego, TX
- Average wind speed in January: 8.7mph
The windiest month (with the highest average wind speed) is May (11.2mph).
The calmest month (with the lowest average wind speed) is September (8.2mph).
Average humidity in January
San Diego, TX
- Average humidity in January: 67%
The month with the highest relative humidity is May (72%).
The month with the lowest relative humidity is August (62%).
Average rainfall in January
San Diego, TX
- Average rainfall in January: 0.63"
The wettest month (with the highest rainfall) is September (2.52").
The driest month (with the least rainfall) is February (0.59").
Average rainfall days in January
San Diego, TX
- Average rainfall days in January: 7 days
The month with the highest number of rainy days is September (17.1 days).
The month with the least rainy days is January (7 days).
Average snowfall in January
San Diego, TX
- Average snowfall in January: 0.04"
The months with the highest snowfall are January, February and December (0.04").
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0").
Average snowfall days in January
San Diego, TX
- Average snowfall days in January: 0.2 days
The months with the highest number of snowfall days are January and February (0.2 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).
Average daylight in January /
Average sunshine in January
San Diego, TX
- Average daylight in January: 10h and 4min
The month with the longest days is June (Average daylight: 13h and 54min).
The month with the shortest days is December (Average daylight: 10h and 24min).
- Average sunshine in January: 6h and 3min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).
Average sunshine days in January
San Diego, TX
- Average sunshine days in January: 21.8 days
The month with the most sunshine days is January (21.8 days).
The month with the least sunshine days is September (11.2 days).
Average UV index in January
San Diego, TX
- Average UV index in January: 4
The month with the highest UV index is July (UV index 8).
The months with the lowest UV index are January and December (UV index 4).
Average cloud cover in January
San Diego, TX
- Average cloud cover in January: 37
The months with the most cloud cover are February and December (Cloud cover 43).
The month with the least cloud cover is August (Cloud cover 19).
Average visibility in January
San Diego, TX
- 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 Diego, Texas, USA
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