January weather forecastSouth Whittier, CA
January
Weather in January
January, like December, in South Whittier, California, is another refreshing winter month, with an average temperature fluctuating between 66.9°F (19.4°C) and 50.7°F (10.4°C).Temperature
With the advent of January, South Whittier's high-temperatures adjust to a still enjoyable 66.9°F (19.4°C), closely aligning with the preceding month. South Whittier's nighttime temperature during January is consistently averaged at a fresh 50.7°F (10.4°C).Humidity
The average relative humidity in January in South Whittier is 51%.Rainfall
In January, in South Whittier, the rain falls for 2.6 days. Throughout January, 0.2" (5mm) of precipitation is accumulated. In South Whittier, during the entire year, the rain falls for 27.3 days and collects up to 1.97" (50mm) of precipitation.Daylight
The average length of the day in January in South Whittier is 10h and 12min.On the first day of January, sunrise is at 6:57 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
The months with the least sunshine are January, February and December, with an average of 6.8h of sunshine.UV index
In South Whittier, the average daily maximum UV index in January is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.Note: In January, a regular UV index of 5 translates into these guidelines:
Prioritize safety - Recommendations to avert sunburn are shared. Direct exposure to the Sun during its peak hours around mid-day should be minimized for safety. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in January
South Whittier, CA
- Average high temperature in January: 66.9°F
The warmest month (with the highest average high temperature) is August (85.6°F).
The month with the lowest average high temperature is December (64.8°F).
- Average low temperature in January: 50.7°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 (49.8°F).
Average pressure in January
South Whittier, 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
South Whittier, CA
- Average wind speed in January: 5.3mph
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
South Whittier, CA
- Average humidity in January: 51%
The month with the highest relative humidity is June (63%).
The month with the lowest relative humidity is November (48%).
Average rainfall in January
South Whittier, CA
- Average rainfall in January: 0.2"
The wettest month (with the highest rainfall) is December (0.47").
The driest month (with the least rainfall) is June (0").
Average rainfall days in January
South Whittier, CA
- Average rainfall days in January: 2.6 days
The month with the highest number of rainy days is March (4.6 days).
The month with the least rainy days is June (0.5 days).
Average daylight in January /
Average sunshine in January
South Whittier, 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: 9h and 54min).
- Average sunshine in January: 6h and 48min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The months with the least sunshine are January, February and December (Average sunshine: 6h and 48min).
Average sunshine days in January
South Whittier, CA
- Average sunshine days in January: 27.5 days
The month with the most sunshine days is June (29.3 days).
The month with the least sunshine days is February (23.8 days).
Average UV index in January
South Whittier, CA
- Average UV index in January: 5
The month with the highest UV index is August (UV index 7).
The months with the lowest UV index are February, November and December (UV index 4).
Average cloud cover in January
South Whittier, CA
- Average cloud cover in January: 21
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 6).
Average visibility in January
South Whittier, 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).
