January weather forecastFoothill Ranch, CA
January
Weather in January
January, like December, in Foothill Ranch, California, is another refreshing winter month, with an average temperature ranging between min 50°F (10°C) and max 65.1°F (18.4°C).Temperature
As December transitions into January, Foothill Ranch records an average high-temperature of a still enjoyable 65.1°F (18.4°C), showing a gentle shift from the preceding month. Foothill Ranch encounters an average low-temperature of 50°F (10°C) during January nights.Humidity
The average relative humidity in January is 57%.Rainfall
In January, in Foothill Ranch, the rain falls for 5.6 days. Throughout January, 1.3" (33mm) of precipitation is accumulated. In Foothill Ranch, during the entire year, the rain falls for 65.4 days and collects up to 9.17" (233mm) of precipitation.Daylight
In January, the average length of the day is 10h and 13min.On the first day of the month, sunrise is at 6:55 am and sunset at 4:53 pm. On the last day of January, sunrise is at 6:47 am and sunset at 5:20 pm PST.
Sunshine
In January, the average sunshine in Foothill Ranch is 6.8h.UV index
The months with the lowest UV index in Foothill Ranch are January through March, November and December, with an average maximum UV index of 4. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 4 during January translates into the following directions:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. 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
Average temperature in January
Foothill Ranch, CA
- Average high temperature in January: 65.1°F
The warmest month (with the highest average high temperature) is August (82°F).
The month with the lowest average high temperature is December (63.1°F).
- Average low temperature in January: 50°F
The month with the highest average low temperature is August (64.4°F).
The coldest month (with the lowest average low temperature) is February (48.7°F).
Average pressure in January
Foothill Ranch, CA
- Average pressure in January: 30.1"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are June and September (29.88"Hg).
Average wind speed in January
Foothill Ranch, CA
- Average wind speed in January: 5mph
The windiest months (with the highest average wind speed) are April and May (5.7mph).
The calmest months (with the lowest average wind speed) are August and September (4.5mph).
Average humidity in January
Foothill Ranch, CA
- Average humidity in January: 57%
The months with the highest relative humidity are May and June (69%).
The month with the lowest relative humidity is November (55%).
Average rainfall in January
Foothill Ranch, CA
- Average rainfall in January: 1.3"
The wettest month (with the highest rainfall) is December (1.85").
The driest month (with the least rainfall) is June (0.08").
Average rainfall days in January
Foothill Ranch, CA
- Average rainfall days in January: 5.6 days
The month with the highest number of rainy days is March (8.1 days).
The month with the least rainy days is June (2 days).
Average daylight in January /
Average sunshine in January
Foothill Ranch, CA
- Average daylight in January: 10h and 12min
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 48min
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 36min).
Average sunshine days in January
Foothill Ranch, CA
- Average sunshine days in January: 24.2 days
The months with the most sunshine days are January and October (24.2 days).
The month with the least sunshine days is May (19.3 days).
Average UV index in January
Foothill Ranch, 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
Foothill Ranch, CA
- Average cloud cover in January: 22
The months with the most cloud cover are March and December (Cloud cover 24).
The month with the least cloud cover is August (Cloud cover 6).
Average visibility in January
Foothill Ranch, 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).
