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 snowfall in January
- Average snowfall 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 introduction of January notes a subtle temperature variation to a moderate 55.9°F (13.3°C) from December's 54°F (12.2°C). Throughout January, the temperature falls to an average low of 40.6°F (4.8°C).Humidity
The average relative humidity in January is 71%.Rainfall
In January, the rain falls for 9.2 days. Throughout January, 1.85" (47mm) of precipitation is accumulated. Throughout the year, there are 70.2 rainfall days, and 13.43" (341mm) of precipitation is accumulated.Snowfall
January through November are months without snowfall in Folsom.Daylight
In Folsom, the average length of the day in January is 9h and 50min.On the first day of January, sunrise is at 7:22 am and sunset at 4:53 pm. On the last day of the month, sunrise is at 7:11 am and sunset at 5:24 pm PST.
Sunshine
In Folsom, the average sunshine in January is 6h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 3. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.Note: The daily high UV index of 3 in January translates into this advice:
Be vigilant - A duty to shield skin and eyes from injury exists. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are January temperatures?
What is the average humidity in January in Folsom?
How many days does it rain in January?
When it does not snow?
Does it snow in January?
How many hours of daylight does Folsom have in January?
When are sunrise and sunset in January?
How long on average sun shines in January?
What are the months with the lowest UV index?
What is the UV index reading in January?
Average temperature in January
Folsom, CA
- Average high temperature in January: 55.9°F
The warmest month (with the highest average high temperature) is July (93.7°F).
The month with the lowest average high temperature is December (54°F).
- Average low temperature in January: 40.6°F
The month with the highest average low temperature is August (59.9°F).
The coldest month (with the lowest average low temperature) is December (40.1°F).
Average pressure in January
Folsom, CA
- Average pressure in January: 30.16"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in January
Folsom, CA
- Average wind speed in January: 4.7mph
The windiest month (with the highest average wind speed) is February (5.5mph).
The calmest month (with the lowest average wind speed) is September (3.9mph).
Average humidity in January
Folsom, CA
- Average humidity in January: 71%
The month with the highest relative humidity is March (74%).
The month with the lowest relative humidity is July (41%).
Average rainfall in January
Folsom, CA
- Average rainfall in January: 1.85"
The wettest month (with the highest rainfall) is March (2.48").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in January
Folsom, CA
- Average rainfall days in January: 9.2 days
The month with the highest number of rainy days is March (12.9 days).
The month with the least rainy days is July (1.2 days).
Average snowfall in January
Folsom, CA
- Average snowfall in January: 0"
The month with the highest snowfall is December (0.04").
The months with the least snowfall are January, February, March, April, May, June, July, August, September, October and November (0").
Average snowfall days in January
Folsom, CA
- Average snowfall days in January: 0 days
The month with the highest number of snowfall days is December (0.2 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
Folsom, CA
- Average daylight in January: 9h and 5min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in January: 6h and 0min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).
Average sunshine days in January
Folsom, CA
- Average sunshine days in January: 21.3 days
The month with the most sunshine days is July (29.1 days).
The month with the least sunshine days is March (17.3 days).
Average UV index in January
Folsom, CA
- Average UV index in January: 3
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in January
Folsom, CA
- Average cloud cover in January: 33
The month with the most cloud cover is March (Cloud cover 38).
The month with the least cloud cover is July (Cloud cover 4).
Average visibility in January
Folsom, 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).
Folsom, California, USA
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