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
January's weather in Fullerton records an average high-temperature of a still enjoyable 66.2°F (19°C), showing little deviation from December. Fullerton, during January, witnesses an average low-temperature of 51.4°F (10.8°C).Humidity
The average relative humidity in January in Fullerton is 54%.Rainfall
In Fullerton, in January, it is raining for 4.8 days, with typically 1.14" (29mm) of accumulated precipitation. Throughout the year, in Fullerton, there are 52.5 rainfall days, and 7.09" (180mm) of precipitation is accumulated.Daylight
In Fullerton, California, the average length of the day in January is 10h and 12min.On the first day of January in Fullerton, California, sunrise is at 6:56 am and sunset at 4:53 pm. On the last day of the month, sunrise is at 6:49 am and sunset at 5:21 pm PST.
Sunshine
In Fullerton, 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 Fullerton. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum daily UV index, 4 in January, converts into the following recommendations:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
Frequently asked questions
What are the temperatures in Fullerton in January?
What is the average humidity in January in Fullerton?
How much does it rain in Fullerton in January?
How many hours of daylight does Fullerton have in January?
What time are sunrise and sunset in January in Fullerton?
How many hours of sunshine does Fullerton have in January?
When is the lowest UV index in Fullerton?
How high is the UV index in January in Fullerton?
Average temperature in January
Fullerton, CA
- Average high temperature in January: 66.2°F
The warmest month (with the highest average high temperature) is August (83.5°F).
The month with the lowest average high temperature is December (64°F).
- Average low temperature in January: 51.4°F
The month with the highest average low temperature is August (65.5°F).
The coldest month (with the lowest average low temperature) is February (50.2°F).
Average pressure in January
Fullerton, 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
Fullerton, CA
- Average wind speed in January: 5.2mph
The windiest month (with the highest average wind speed) is April (6mph).
The calmest months (with the lowest average wind speed) are September and October (4.7mph).
Average humidity in January
Fullerton, CA
- Average humidity in January: 54%
The month with the highest relative humidity is June (65%).
The month with the lowest relative humidity is November (51%).
Average rainfall in January
Fullerton, CA
- Average rainfall in January: 1.14"
The wettest month (with the highest rainfall) is December (1.54").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in January
Fullerton, CA
- Average rainfall days in January: 4.8 days
The month with the highest number of rainy days is March (7.3 days).
The month with the least rainy days is June (1.5 days).
Average daylight in January /
Average sunshine in January
Fullerton, 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: 9h and 54min).
- 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
Fullerton, CA
- Average sunshine days in January: 25.2 days
The month with the most sunshine days is August (25.8 days).
The month with the least sunshine days is February (20.6 days).
Average UV index in January
Fullerton, 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
Fullerton, CA
- Average cloud cover in January: 20
The months with the most cloud cover are March and December (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in January
Fullerton, 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).
Fullerton, California, USA
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