January weather forecastWinnetka, CA
January
Weather in January
January, the same as December, is another comfortable winter month in Winnetka, California, with an average temperature fluctuating between 47.7°F (8.7°C) and 63.5°F (17.5°C).Temperature
January brings a marginal elevation to a still enjoyable 63.5°F (17.5°C) from December's 61.9°F (16.6°C) in Winnetka's average high-temperatures. The mean low-temperature during January nights is a chilly 47.7°F (8.7°C).Humidity
In Winnetka, the average relative humidity in January is 52%.Rainfall
In Winnetka, in January, it is raining for 4.5 days, with typically 1.14" (29mm) of accumulated precipitation. Throughout the year, there are 42.7 rainfall days, and 6.46" (164mm) of precipitation is accumulated.Snowfall
January through November are months without snowfall.Daylight
In Winnetka, the average length of the day in January is 10h and 11min.On the first day of the month, sunrise is at 7:00 am and sunset at 4:55 pm. On the last day of January, sunrise is at 6:52 am and sunset at 5:23 pm PST.
Sunshine
January, February and December, with an average of 6.8h of sunshine, are months with the least sunshine.UV index
In January, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the ordinary person.Note: The UV index of 4 during January leads to these advisories:
Guard yourself - An obligation to protect skin and eyes from harm exists. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in January
Winnetka, CA
- Average high temperature in January: 63.5°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 (61.9°F).
- Average low temperature in January: 47.7°F
The month with the highest average low temperature is August (64.8°F).
The coldest month (with the lowest average low temperature) is December (46.9°F).
Average pressure in January
Winnetka, CA
- Average pressure in January: 30.11"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in January
Winnetka, CA
- Average wind speed in January: 6.1mph
The windiest months (with the highest average wind speed) are January and December (6.1mph).
The calmest month (with the lowest average wind speed) is September (4.5mph).
Average humidity in January
Winnetka, CA
- Average humidity in January: 52%
The month with the highest relative humidity is June (59%).
The month with the lowest relative humidity is November (47%).
Average rainfall in January
Winnetka, CA
- Average rainfall in January: 1.14"
The wettest month (with the highest rainfall) is February (1.22").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in January
Winnetka, CA
- Average rainfall days in January: 4.5 days
The month with the highest number of rainy days is March (6.5 days).
The month with the least rainy days is June (1.4 days).
Average snowfall days in January
Winnetka, 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
Winnetka, 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 June and July (Average sunshine: 12h and 6min).
The months with the least sunshine are January, February and December (Average sunshine: 6h and 48min).
Average sunshine days in January
Winnetka, CA
- Average sunshine days in January: 25.3 days
The months with the most sunshine days are August and October (27.3 days).
The month with the least sunshine days is February (22 days).
Average UV index in January
Winnetka, CA
- Average UV index in January: 4
The months with the highest UV index are June, July, August and September (UV index 6).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in January
Winnetka, CA
- Average cloud cover in January: 21
The month with the most cloud cover is March (Cloud cover 22).
The month with the least cloud cover is August (Cloud cover 4).
Average visibility in January
Winnetka, 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).
