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 denotes a barely perceptible change in the average high-temperatures to a still mild 57.7°F (14.3°C) from December's 56.3°F (13.5°C). During January, Fort Ross records a consistent average nighttime temperature of 42.3°F (5.7°C).Humidity
In Fort Ross, the average relative humidity in January is 75%.Rainfall
In Fort Ross, California, in January, during 8.1 rainfall days, 1.97" (50mm) of precipitation is typically accumulated. Throughout the year, there are 60.1 rainfall days, and 12.87" (327mm) of precipitation is accumulated.Daylight
In Fort Ross, the average length of the day in January is 9h and 50min.On the first day of January in Fort Ross, California, sunrise is at 7:30 am and sunset at 5:02 pm. On the last day of the month, sunrise is at 7:19 am and sunset at 5:33 pm PST.
Sunshine
In January, the average sunshine is 5.6h.UV index
January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index in Fort Ross. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: A maximum high UV index of 3 in January translates into the following recommendations:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Fort Ross in January?
What is the average humidity in January in Fort Ross?
How many days does it rain in January in Fort Ross?
How many hours of daylight does Fort Ross have in January?
When is the sunrise / sunset in January in Fort Ross?
How long on average sun shines in January in Fort Ross?
When is the lowest UV index in Fort Ross?
What is the UV index reading in January in Fort Ross?
Average temperature in January
Fort Ross, CA
- Average high temperature in January: 57.7°F
The warmest month (with the highest average high temperature) is August (81°F).
The month with the lowest average high temperature is December (56.3°F).
- Average low temperature in January: 42.3°F
The months with the highest average low temperature are August and September (53.4°F).
The coldest month (with the lowest average low temperature) is December (41.4°F).
Average pressure in January
Fort Ross, CA
- Average pressure in January: 30.13"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).
Average wind speed in January
Fort Ross, CA
- Average wind speed in January: 5.3mph
The windiest month (with the highest average wind speed) is May (7.2mph).
The calmest month (with the lowest average wind speed) is November (5mph).
Average humidity in January
Fort Ross, CA
- Average humidity in January: 75%
The month with the highest relative humidity is March (77%).
The month with the lowest relative humidity is September (62%).
Average rainfall in January
Fort Ross, CA
- Average rainfall in January: 1.97"
The wettest month (with the highest rainfall) is February (3.27").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in January
Fort Ross, CA
- Average rainfall days in January: 8.1 days
The month with the highest number of rainy days is March (10.3 days).
The month with the least rainy days is August (0.9 days).
Average daylight in January /
Average sunshine in January
Fort Ross, 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: 5h and 4min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 24min).
Average sunshine days in January
Fort Ross, CA
- Average sunshine days in January: 22 days
The month with the most sunshine days is July (28.9 days).
The month with the least sunshine days is February (19.9 days).
Average UV index in January
Fort Ross, CA
- Average UV index in January: 3
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in January
Fort Ross, CA
- Average cloud cover in January: 38
The month with the most cloud cover is March (Cloud cover 42).
The month with the least cloud cover is July (Cloud cover 11).
Average visibility in January
Fort Ross, 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).
Fort Ross, California, USA
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