January weather forecastWest Covina, CA
January
Weather in January
January sees temperature variations ranging from 66.2°F (19°C) to 48.4°F (9.1°C) in West Covina, California, which makes the weather quite pleasant. The start of the year brings with it lower daylight hours, making the days relatively short. Rainfall characterizes this month, providing a refreshing break from the relatively dry winter months preceding it. The humidity dips a bit from the previous month, giving January a dry, crisp feel. January's short daylight hours extend into February, hanging onto the winter's dark days for a bit longer.Temperature
West Covina transitions into January recording an average high-temperature of a still enjoyable 66.2°F (19°C), closely aligning with the preceding month's temperature. During the month of January, West Covina's nighttime temperature lowers to an average of 48.4°F (9.1°C).Humidity
The average relative humidity in January in West Covina is 50%.Rainfall
In West Covina, during January, the rain falls for 5.4 days and regularly aggregates up to 1.34" (34mm) of precipitation. Throughout the year, in West Covina, there are 49.8 rainfall days, and 7.76" (197mm) of precipitation is accumulated.Snowfall
In West Covina, snow does not fall in January through November.Daylight
The average length of the day in January is 10h and 11min.On the first day of the month, sunrise is at 6:57 am and sunset at 4:53 pm. On the last day of January, sunrise is at 6:49 am and sunset at 5:20 pm PST.
Sunshine
In January, the average sunshine in West Covina is 7h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 4. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for average individuals.Note: The UV index of 4 during January leads to these advisories:
Take measures. Individuals with light skin might experience burns in under 30 minutes. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in January
West Covina, CA
- Average high temperature in January: 66.2°F
The warmest month (with the highest average high temperature) is August (88.9°F).
The month with the lowest average high temperature is December (63.5°F).
- Average low temperature in January: 48.4°F
The month with the highest average low temperature is August (64.9°F).
The coldest month (with the lowest average low temperature) is December (47.3°F).
Average pressure in January
West Covina, 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
West Covina, CA
- Average wind speed in January: 5.3mph
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 September and October (4.5mph).
Average humidity in January
West Covina, CA
- Average humidity in January: 50%
The months with the highest relative humidity are May and June (57%).
The month with the lowest relative humidity is November (46%).
Average rainfall in January
West Covina, CA
- Average rainfall in January: 1.34"
The wettest month (with the highest rainfall) is December (1.73").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in January
West Covina, CA
- Average rainfall days in January: 5.4 days
The month with the highest number of rainy days is March (6.8 days).
The month with the least rainy days is June (1.3 days).
Average snowfall days in January
West Covina, CA
- Average snowfall days in January: 0 days
The month with the highest number of snowfall days is December (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, September, October and November (0 days).
Average daylight in January /
Average sunshine in January
West Covina, 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: 7h and 0min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The months with the least sunshine are February and December (Average sunshine: 6h and 54min).
Average sunshine days in January
West Covina, CA
- Average sunshine days in January: 24.7 days
The month with the most sunshine days is June (28 days).
The month with the least sunshine days is February (21.6 days).
Average UV index in January
West Covina, CA
- Average UV index in January: 4
The month with the highest UV index is August (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 4).
Average cloud cover in January
West Covina, CA
- Average cloud cover in January: 20
The month with the most cloud cover is December (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in January
West Covina, 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).
