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 40.6°F (4.8°C) and a low of 27°F (-2.8°C).Humidity
In Jeff, the average relative humidity in January is 79%.Rainfall
In Jeff, during January, the rain falls for 11.3 days and regularly aggregates up to 1.89" (48mm) of precipitation. In Jeff, during the entire year, the rain falls for 168.8 days and collects up to 24.84" (631mm) of precipitation.Snowfall
Months with snowfall are January through April, October through December. In Jeff, during January, snow falls for 10.3 days and regularly aggregates up to 2.56" (65mm) of snow. In Jeff, Kentucky, during the entire year, snow falls for 33.3 days and aggregates up to 11.34" (288mm) of snow.Daylight
The average length of the day in January in Jeff is 9h and 57min.On the first day of the month, sunrise is at 7:46 am and sunset at 5:25 pm. On the last day of January, sunrise is at 7:36 am and sunset at 5:55 pm EST.
Sunshine
The month with the least sunshine is January, with an average of 4.3h of sunshine.UV index
January, February and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for ordinary individuals.Note: A typical high UV index of 2 in January suggests the following recommendations:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. When the Sun is at its strongest around midday, find shade and limit exposure. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Stay alert! Snow's reflective properties can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the coldest months?
How cold is January in Jeff?
What is the average humidity in January?
How many days does it rain in January?
How many days does it snow in January?
How many hours of daylight does Jeff have in January?
What time are sunrise and sunset in January?
What is the month with the least sunshine?
How long on average sun shines in January?
What is the month with the lowest UV index?
How high is the UV index in January?
Average temperature in January
Jeff, KY
- Average high temperature in January: 40.6°F
The warmest month (with the highest average high temperature) is July (85.3°F).
The month with the lowest average high temperature is January (40.6°F).
- Average low temperature in January: 27°F
The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (27°F).
Average pressure in January
Jeff, KY
- Average pressure in January: 30.16"Hg
The months with the highest atmospheric pressure are January and November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).
Average wind speed in January
Jeff, KY
- Average wind speed in January: 6.6mph
The windiest month (with the highest average wind speed) is April (6.7mph).
The calmest month (with the lowest average wind speed) is August (4mph).
Average humidity in January
Jeff, KY
- Average humidity in January: 79%
The months with the highest relative humidity are February and December (80%).
The month with the lowest relative humidity is November (75%).
Average rainfall in January
Jeff, KY
- Average rainfall in January: 1.89"
The wettest month (with the highest rainfall) is February (2.76").
The driest month (with the least rainfall) is September (1.46").
Average rainfall days in January
Jeff, KY
- Average rainfall days in January: 11.3 days
The month with the highest number of rainy days is May (18.6 days).
The month with the least rainy days is November (10.5 days).
Average snowfall in January
Jeff, KY
- Average snowfall in January: 2.56"
The month with the highest snowfall is February (3.15").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in January
Jeff, KY
- Average snowfall days in January: 10.3 days
The month with the highest number of snowfall days is January (10.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
Jeff, KY
- Average daylight in January: 9h and 5min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in January: 4h and 2min
The months with the most sunshine are June, July and August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days in January
Jeff, KY
- Average sunshine days in January: 12.7 days
The month with the most sunshine days is November (17.3 days).
The month with the least sunshine days is May (9.7 days).
Average UV index in January
Jeff, KY
- Average UV index in January: 2
The months with the highest UV index are May, June and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in January
Jeff, KY
- Average cloud cover in January: 57
The month with the most cloud cover is February (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in January
Jeff, KY
- Average visibility in January: 5mi
The months with the highest visibility are April, October and November (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September and December (5mi).
Jeff, Kentucky, USA
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