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 onset of January brings an average high-temperature of a still enjoyable 64.9°F (18.3°C), nearly matching the December temperature. During January, Tierrasanta's temperature falls to a steady low-temperature average of 51.4°F (10.8°C).Humidity
In Tierrasanta, the average relative humidity in January is 59%.Rainfall
In Tierrasanta, in January, during 5.2 rainfall days, 0.91" (23mm) of precipitation is typically accumulated. In Tierrasanta, during the entire year, the rain falls for 57.9 days and collects up to 7.48" (190mm) of precipitation.Daylight
In Tierrasanta, the average length of the day in January is 10h and 17min.On the first day of the month, sunrise is at 6:50 am and sunset at 4:52 pm. On the last day of January, in Tierrasanta, sunrise is at 6:43 am and sunset at 5:19 pm PST.
Sunshine
The average sunshine in January in Tierrasanta is 6.9h.UV index
January through March, November and December, with an average maximum UV index of 4, are months with the lowest UV index. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: In January, a daily maximum UV index of 4 leads to the following instructions:
Undertake precautions - Guarding against sun damage is counselled. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Tierrasanta in January?
What is the average humidity in January?
How much does it rain in January?
How many hours of daylight does Tierrasanta have in January?
When is the sunrise / sunset in January?
How many hours of sunshine does Tierrasanta have in January?
What is the month with the lowest UV index in Tierrasanta?
What is the UV index reading in January?
Average temperature in January
Tierrasanta, 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
Tierrasanta, 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
Tierrasanta, 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
Tierrasanta, 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
Tierrasanta, 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
Tierrasanta, 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 daylight in January /
Average sunshine in January
Tierrasanta, 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
Tierrasanta, 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
Tierrasanta, 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
Tierrasanta, 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
Tierrasanta, 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).
Tierrasanta, California, USA
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