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 lowest temperatures are recorded in January, with averages reaching a high of 26.1°F (-3.3°C) and a low of 14.4°F (-9.8°C).Humidity
In January, the average relative humidity is 86%.Rainfall
January is the month with the least rainfall in Jefferson. Rain falls for 4.6 days and accumulates 1.5" (38mm) of precipitation.Snowfall
January through May, October through December are months with snowfall in Jefferson, New York. In Jefferson, in January, during 19 snowfall days, 7.48" (190mm) of snow is typically accumulated. In Jefferson, New York, during the entire year, snow falls for 98 days and aggregates up to 50.39" (1280mm) of snow.Daylight
In Jefferson, the average length of the day in January is 9h and 29min.On the first day of January in Jefferson, sunrise is at 7:27 am and sunset at 4:35 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 5:10 pm EST.
Sunshine
In Jefferson, the average sunshine in January is 3h.UV index
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV radiation for the ordinary person.Note: A daily maximum UV index of 1 in January translates into the following instructions:
Children, infants, and individuals with sensitive skin should be constantly protected from extended sun exposure. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the coldest months in Jefferson?
How cold is January in Jefferson?
What is the average humidity in January in Jefferson?
What is the driest month in Jefferson?
How much does it rain in Jefferson in January?
How many days does it snow in January in Jefferson?
How many hours of daylight does Jefferson have in January?
What time are sunrise and sunset in January in Jefferson?
How many hours of sunshine does Jefferson have in January?
What are the months with the lowest UV index in Jefferson?
How high is the UV index in January in Jefferson?
Average temperature in January
Jefferson, NY
- Average high temperature in January: 26.1°F
The warmest month (with the highest average high temperature) is July (77°F).
The month with the lowest average high temperature is January (26.1°F).
- Average low temperature in January: 14.4°F
The month with the highest average low temperature is July (56.8°F).
The coldest month (with the lowest average low temperature) is January (14.4°F).
Average pressure in January
Jefferson, NY
- Average pressure in January: 30.05"Hg
The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in January
Jefferson, NY
- Average wind speed in January: 9.4mph
The windiest month (with the highest average wind speed) is January (9.4mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity in January
Jefferson, NY
- Average humidity in January: 86%
The months with the highest relative humidity are February and December (87%).
The months with the lowest relative humidity are April, May, June and July (80%).
Average rainfall in January
Jefferson, NY
- Average rainfall in January: 1.5"
The wettest month (with the highest rainfall) is August (3.27").
The driest month (with the least rainfall) is January (1.5").
Average rainfall days in January
Jefferson, NY
- Average rainfall days in January: 4.6 days
The month with the highest number of rainy days is May (19.3 days).
The month with the least rainy days is January (4.6 days).
Average snowfall in January
Jefferson, NY
- Average snowfall in January: 7.48"
The month with the highest snowfall is December (9.84").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in January
Jefferson, NY
- Average snowfall days in January: 19 days
The month with the highest number of snowfall days is January (19 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Jefferson, NY
- Average daylight in January: 9h and 3min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in January: 3h and 0min
The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is February (Average sunshine: 2h and 48min).
Average sunshine days in January
Jefferson, NY
- Average sunshine days in January: 9.5 days
The month with the most sunshine days is September (15 days).
The month with the least sunshine days is February (7.5 days).
Average UV index in January
Jefferson, NY
- Average UV index in January: 1
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 1).
Average cloud cover in January
Jefferson, NY
- Average cloud cover in January: 71
The month with the most cloud cover is February (Cloud cover 73).
The month with the least cloud cover is July (Cloud cover 42).
Average visibility in January
Jefferson, NY
- Average visibility in January: 5mi
The months with the highest visibility are January, April, May, June, July, August, October, November and December (5mi).
The months with the lowest visibility are February, March and September (4mi).
Jefferson, New York, USA
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