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
The arrival of January brings an average high-temperature of a still enjoyable 64.9°F (18.3°C), nearly identical to December's 62.4°F (16.9°C). Throughout January, an average low-temperature of 46.9°F (8.3°C) is experienced in Charter Oak.Humidity
The average relative humidity in January in Charter Oak is 49%.Rainfall
In Charter Oak, in January, during 4.9 rainfall days, 1.06" (27mm) of precipitation is typically accumulated. Throughout the year, in Charter Oak, there are 45.2 rainfall days, and 6.5" (165mm) of precipitation is accumulated.Daylight
In Charter Oak, the average length of the day in January is 10h and 11min.On the first day of January, sunrise is at 6:56 am and sunset at 4:52 pm. On the last day of the month, sunrise is at 6:49 am and sunset at 5:20 pm PST.
Sunshine
The months with the least sunshine are January, February and December, with an average of 7h of sunshine.UV index
In January, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for average individuals.Note: The maximum daily UV index, 4 in January, converts into the following recommendations:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Experience reduced UV exposure by about half when donning a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Charter Oak in January?
What is the average humidity in January in Charter Oak?
How many days does it rain in January in Charter Oak?
How many hours of daylight does Charter Oak have in January?
When are sunrise and sunset in January in Charter Oak?
What is the month with the least sunshine in Charter Oak?
How long on average sun shines in January in Charter Oak?
How high is the UV index in January in Charter Oak?
Average temperature in January
Charter Oak, CA
- Average high temperature in January: 64.9°F
The warmest month (with the highest average high temperature) is August (89.4°F).
The month with the lowest average high temperature is December (62.4°F).
- Average low temperature in January: 46.9°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 (45.5°F).
Average pressure in January
Charter Oak, 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 (29.87"Hg).
Average wind speed in January
Charter Oak, CA
- Average wind speed in January: 5.2mph
The windiest months (with the highest average wind speed) are April and May (5.7mph).
The calmest month (with the lowest average wind speed) is September (4.3mph).
Average humidity in January
Charter Oak, CA
- Average humidity in January: 49%
The months with the highest relative humidity are March and May (55%).
The months with the lowest relative humidity are August and November (45%).
Average rainfall in January
Charter Oak, CA
- Average rainfall in January: 1.06"
The wettest month (with the highest rainfall) is February (1.46").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days in January
Charter Oak, CA
- Average rainfall days in January: 4.9 days
The month with the highest number of rainy days is March (6.3 days).
The month with the least rainy days is June (1.2 days).
Average daylight in January /
Average sunshine in January
Charter Oak, 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: 7h and 0min
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: 7h and 0min).
Average sunshine days in January
Charter Oak, CA
- Average sunshine days in January: 25.1 days
The month with the most sunshine days is June (27.8 days).
The month with the least sunshine days is February (22 days).
Average UV index in January
Charter Oak, CA
- Average UV index in January: 4
The months with the highest UV index are July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in January
Charter Oak, CA
- Average cloud cover in January: 19
The months with the most cloud cover are March and December (Cloud cover 21).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility in January
Charter Oak, 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).
Charter Oak, California, USA
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