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
Tustin's average high-temperature in January is a still comfortable 65.5°F (18.6°C), marking an insignificant difference from the 63.1°F (17.3°C) of December. The average temperature in Tustin during January nights dips to a fresh 52°F (11.1°C).Humidity
In Tustin, the average relative humidity in January is 57%.Rainfall
In Tustin, in January, during 4.3 rainfall days, 0.43" (11mm) of precipitation is typically accumulated. Throughout the year, there are 51.9 rainfall days, and 4.13" (105mm) of precipitation is accumulated.Daylight
The average length of the day in January is 10h and 13min.On the first day of the month, sunrise is at 6:56 am and sunset at 4:53 pm. On the last day of January, in Tustin, California, sunrise is at 6:48 am and sunset at 5:20 pm PST.
Sunshine
In January, the average sunshine in Tustin is 6.8h.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 value of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: During January, 4 as the daily maximum UV index converts into the following advice:
Take necessary precautions - Defending against sun damage is advocated. The Sun's radiation is especially intense around midday; try to stay in shade during this period. 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 is the average January temperature in Tustin?
What is the average humidity in January in Tustin?
How much does it rain in Tustin in January?
What is the average length of the day in January in Tustin?
When is the sunrise / sunset in January in Tustin?
How long on average sun shines in January in Tustin?
What is the month with the lowest UV index in Tustin?
How high is the UV index in January in Tustin?
Average temperature in January
Tustin, CA
- Average high temperature in January: 65.5°F
The warmest month (with the highest average high temperature) is August (80.2°F).
The month with the lowest average high temperature is December (63.1°F).
- Average low temperature in January: 52°F
The month with the highest average low temperature is August (65.1°F).
The coldest month (with the lowest average low temperature) is February (50.7°F).
Average pressure in January
Tustin, CA
- Average pressure in January: 30.1"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in January
Tustin, CA
- Average wind speed in January: 5.2mph
The windiest months (with the highest average wind speed) are April and May (6mph).
The calmest months (with the lowest average wind speed) are August, September and October (4.8mph).
Average humidity in January
Tustin, CA
- Average humidity in January: 57%
The month with the highest relative humidity is June (70%).
The month with the lowest relative humidity is November (55%).
Average rainfall in January
Tustin, CA
- Average rainfall in January: 0.43"
The wettest month (with the highest rainfall) is December (0.87").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in January
Tustin, CA
- Average rainfall days in January: 4.3 days
The month with the highest number of rainy days is March (6.7 days).
The month with the least rainy days is June (1.3 days).
Average daylight in January /
Average sunshine in January
Tustin, CA
- Average daylight in January: 10h and 1min
The month with the longest days is June (Average daylight: 14h and 24min).
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 42min).
Average sunshine days in January
Tustin, CA
- Average sunshine days in January: 25.6 days
The month with the most sunshine days is June (26.9 days).
The month with the least sunshine days is February (20.3 days).
Average UV index in January
Tustin, 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, March, November and December (UV index 4).
Average cloud cover in January
Tustin, CA
- Average cloud cover in January: 21
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 6).
Average visibility in January
Tustin, 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).
Tustin, California, USA
Weather forecast for your location
2. Allow the app to use your location