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
In Jamestown, January's average high-temperature stands at a mild 55.4°F (13°C), closely related to the preceding month. Throughout January, an average nighttime temperature of 38.8°F (3.8°C) is experienced.Humidity
The average relative humidity in January is 67%.Rainfall
In Jamestown, in January, during 8.7 rainfall days, 3.43" (87mm) of precipitation is typically accumulated. In Jamestown, during the entire year, the rain falls for 76.7 days and collects up to 23.9" (607mm) of precipitation.Snowfall
January through March, November and December are months with snowfall. In January, it is snowing for 0.1 days. Throughout January, 0.04" (1mm) of snow is accumulated. Throughout the year, there are 2.1 snowfall days, and 4.41" (112mm) of snow is accumulated.Daylight
The average length of the day in January is 9h and 53min.On the first day of January, sunrise is at 7:17 am and sunset at 4:52 pm. On the last day of the month, sunrise is at 7:06 am and sunset at 5:23 pm PST.
Sunshine
The average sunshine in January is 6.2h.UV index
In January, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for average individuals.Note: The maximum UV index of 3 during January leads to these instructions:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in January?
What is the average humidity in January?
How much does it rain in January?
How much does it snow in January?
What is the average length of the day in January?
When is the sunrise / sunset in January?
How many hours of sunshine does Jamestown have in January?
What is the UV index reading in January?
Average temperature in January
Jamestown, CA
- Average high temperature in January: 55.4°F
The warmest month (with the highest average high temperature) is July (91.4°F).
The month with the lowest average high temperature is December (52.9°F).
- Average low temperature in January: 38.8°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is December (37.2°F).
Average pressure in January
Jamestown, 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 (29.91"Hg).
Average wind speed in January
Jamestown, CA
- Average wind speed in January: 4.8mph
The windiest months (with the highest average wind speed) are February, March and April (5.7mph).
The calmest months (with the lowest average wind speed) are November and December (4.7mph).
Average humidity in January
Jamestown, CA
- Average humidity in January: 67%
The month with the highest relative humidity is March (70%).
The month with the lowest relative humidity is July (32%).
Average rainfall in January
Jamestown, CA
- Average rainfall in January: 3.43"
The wettest month (with the highest rainfall) is March (4.76").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days in January
Jamestown, CA
- Average rainfall days in January: 8.7 days
The month with the highest number of rainy days is March (13.4 days).
The month with the least rainy days is August (1.4 days).
Average snowfall in January
Jamestown, CA
- Average snowfall in January: 0.04"
The month with the highest snowfall is February (2.72").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in January
Jamestown, CA
- Average snowfall days in January: 0.1 days
The month with the highest number of snowfall days is February (1.2 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in January /
Average sunshine in January
Jamestown, 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 36min).
- Average sunshine in January: 6h and 1min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 0min).
Average sunshine days in January
Jamestown, CA
- Average sunshine days in January: 21.8 days
The months with the most sunshine days are July and August (28.4 days).
The month with the least sunshine days is March (16.8 days).
Average UV index in January
Jamestown, CA
- Average UV index in January: 3
The months with the highest UV index are June and July (UV index 7).
The month with the lowest UV index is November (UV index 2).
Average cloud cover in January
Jamestown, CA
- Average cloud cover in January: 30
The month with the most cloud cover is March (Cloud cover 35).
The months with the least cloud cover are July and August (Cloud cover 5).
Average visibility in January
Jamestown, 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).
Jamestown, California, USA
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