January weather forecast
Jeffersontown, KY

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Weather in January

January in Jeffersontown, Kentucky showcases a typical winter scenario. It is the coldest month with temperatures ranging from 26.1°F (-3.3°C) to 39°F (3.9°C). This is accompanied by the frequent appearance of snowfall and relative humidity of 77%. The snow creates a serene winter landscape, while the low temperatures invite residents to cozy up indoors around a warm fire. As the year begins, the weather also sets the mood for winter festivities in town.

Temperature

In Jeffersontown, Kentucky, the month of January is known for its lowest average temperatures, reaching a high of 39°F (3.9°C) and a low of 26.1°F (-3.3°C).

Humidity

In January, the average relative humidity in Jeffersontown is 77%.

Rainfall

In Jeffersontown, in January, it is raining for 8.4 days, with typically 1.14" (29mm) of accumulated precipitation. In Jeffersontown, during the entire year, the rain falls for 140.3 days and collects up to 18.31" (465mm) of precipitation.

Snowfall

Months with snowfall are January through April, November and December. In January, it is snowing for 5.7 days. Throughout January, 0.47" (12mm) of snow is accumulated. Throughout the year, there are 19.9 snowfall days, and 2.44" (62mm) of snow is accumulated.

Daylight

In Jeffersontown, the average length of the day in January is 9h and 52min.
On the first day of January, sunrise is at 7:58 am and sunset at 5:32 pm. On the last day of the month, sunrise is at 7:47 am and sunset at 6:03 pm EST.

Sunshine

The average sunshine in January is 4.4h.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for the average person.
Note: In January, the UV index of 2 transforms into the following advice:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Boost your sun resistance with garments that are densely woven yet spacious. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.
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Frequently asked questions

What are the coldest months in Jeffersontown?

January, on average, is the coldest month in Jeffersontown, Kentucky, registering a high temperature of 39°F (3.9°C) and a low of 26.1°F (-3.3°C).

How cold is it in Jeffersontown in January?

The high-temperature, in January, in Jeffersontown, is 39°F (3.9°C), while the low-temperature averages to 26.1°F (-3.3°C).

What is the average humidity in January in Jeffersontown?

The average relative humidity in January in Jeffersontown, Kentucky, is 77%.

How many days does it rain in January in Jeffersontown?

In January, in Jeffersontown, Kentucky, the rain falls for 8.4 days. Throughout January, 1.14" (29mm) of precipitation is accumulated.

How many days does it snow in January in Jeffersontown?

In Jeffersontown, Kentucky, in January, snow falls for 5.7 days, with typically accumulated 0.47" (12mm) of snow.

What is the average length of the day in January in Jeffersontown?

In Jeffersontown, the average day length in January is 9h and 52min.

What time are sunrise and sunset in January in Jeffersontown?

In January, on the first day of the month, sunrise is at 7:58 am and sunset at 5:32 pm. On the last day of the month, in Jeffersontown, Kentucky, sunrise is at 7:47 am and sunset at 6:03 pm EST.

How many hours of sunshine does Jeffersontown have in January?

In January, the average sunshine duration in Jeffersontown, Kentucky, is 4.4h.

What is the month with the lowest UV index in Jeffersontown?

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.

What is the UV index intensity in January in Jeffersontown?

The average daily maximum UV index in January is 2. A UV Index value of 2, and less, symbolizes a low health risk from unsafe exposure to Sun's UV rays.
Today
Tomorrow
Long-term
YearJanuaryFMAMJJASOND
Dec
January
Feb
Average high temperature
44.1°F 6.7°C
39°F 3.9°C
44.1°F 6.7°C
Average low temperature
32°F 0°C
26.1°F -3.3°C
29.1°F -1.6°C
Average pressure
30.14" 766mmHg
30.15" 766mmHg
30.11" 765mmHg
Average wind speed
7.5mph 12.1km/h
8.1mph 13km/h
7.9mph 12.7km/h
Average max. wind speed
8mph 12.9km/h
8.6mph 13.8km/h
8.5mph 13.7km/h
Average wind speed gusts
11.9mph 19.2km/h
12.8mph 20.6km/h
12.6mph 20.3km/h
Average humidity
79%
77%
80%
Average rainfall
1.26" 32mm
1.14" 29mm
1.54" 39mm
Average rainfall days
9.5
8.4
8.6
Average snowfall
0.39" 10mm
0.47" 12mm
0.67" 17mm
Average snowfall days
3.6
5.7
5.9
Average daylight
9h 4min
9h 5min
10h 5min
Average sunshine
4h 2min
4h 2min
5h 3min
Average sunshine days
18.6
18.6
15.5
Average UV index
2
2
2
Average cloud cover
55%
57%
56%
Average visibility
6mi 9.7km
6mi 9.7km
5mi 8km

Average temperature in January
Jeffersontown, KY

Average temperature in January - Jeffersontown, KY
  • Average high temperature in January: 39°F

The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is January (39°F).

  • Average low temperature in January: 26.1°F

The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).

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Average pressure in January
Jeffersontown, KY

Average pressure in January - Jeffersontown, KY
  • Average pressure in January: 30.15"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).

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Average wind speed in January
Jeffersontown, KY

Average wind speed in January - Jeffersontown, KY
  • Average wind speed in January: 8.1mph

The windiest month (with the highest average wind speed) is January (8.1mph).
The calmest months (with the lowest average wind speed) are July and August (4.9mph).

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Average humidity in January
Jeffersontown, KY

Average humidity in January - Jeffersontown, KY
  • Average humidity in January: 77%

The month with the highest relative humidity is February (80%).
The month with the lowest relative humidity is August (73%).

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Average rainfall in January
Jeffersontown, KY

Average rainfall in January - Jeffersontown, KY
  • Average rainfall in January: 1.14"

The wettest months (with the highest rainfall) are April and May (2.05").
The driest month (with the least rainfall) is September (0.87").

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Average rainfall days in January
Jeffersontown, KY

Average rainfall days in January - Jeffersontown, KY
  • Average rainfall days in January: 8.4 days

The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is January (8.4 days).

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Average snowfall in January
Jeffersontown, KY

Average snowfall in January - Jeffersontown, KY
  • Average snowfall in January: 0.47"

The month with the highest snowfall is February (0.67").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in January
Jeffersontown, KY

Average snowfall days in January - Jeffersontown, KY
  • Average snowfall days in January: 5.7 days

The month with the highest number of snowfall days is February (5.9 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight in January /
Average sunshine in January
Jeffersontown, KY

Average daylight in January / Average sunshine in January - Jeffersontown, KY
  • 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: 4h and 2min

The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is December (Average sunshine: 4h and 18min).

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Average sunshine days in January
Jeffersontown, KY

Average sunshine days in January - Jeffersontown, KY
  • Average sunshine days in January: 18.6 days

The month with the most sunshine days is October (20.4 days).
The month with the least sunshine days is May (12.3 days).

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Average UV index in January
Jeffersontown, KY

Average UV index in January - Jeffersontown, KY
  • Average UV index in January: 2

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 2).

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Average cloud cover in January
Jeffersontown, KY

Average cloud cover in January - Jeffersontown, KY
  • Average cloud cover in January: 57

The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is August (Cloud cover 28).

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Average visibility in January
Jeffersontown, KY

Average visibility in January - Jeffersontown, KY
  • Average visibility in January: 6mi

The months with the highest visibility are January, March, April, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are February and May (5mi).

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Jeffersontown, Kentucky, USA

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