Climate and monthly weather forecast
Jeffersontown, KY

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The climate of Jeffersontown

Jeffersontown, Kentucky, falls in the humid subtropical zone according to the Köppen climate classification. Under this Cfa classification, the area experiences no dry season and maintains a significant concentration of humidity throughout the year.

As a distinct feature of the humid subtropical climate pattern, Jeffersontown sees a variegated tangle of temperature ranges, humidity levels, and rainfall trends. Temperature variations within a year range from a low of 26.1°F (-3.3°C) in the chilled months to a much warmer high of 86.5°F (30.3°C) during the hottest periods. Relative humidity holds steady from 73% to 80% across different months, underscoring its subtropical climate characteristic.

Rainfall in Jeffersontown is evenly spread through the year, with the highest average monthly accumulation recorded at 2.05" (52mm) and the lowest pegged at a still fairly damp 0.87" (22mm). Snowfall, on the other hand, is more season dependent, peaking at 0.67" (17mm) and then descending to no visible snowfall from May to September. Wind measurements indicate an average speed ranging from 4.9mph (7.9km/h) to 8.1mph (13km/h), with the maximum gust velocity touching 12.8mph (20.6km/h).

Reflecting the volume of rainfall, the number of rainy days in a year chart a path from a low of 8.4 days to a high of 16.8 days. In a contrasting pattern, snowfall days idle at zero during the warm months, then skyrocket to 5.9 days amidst heavy winter. The sunlight basks the city for between 4.3 to 10.4 hours per day, illuminating it for up to 14.8 hours on the longest days.

The best time to visit Jeffersontown

Taking weather preferences into account, the best time for a visit to Jeffersontown would be during those months with moderate temperatures, less rainfall, and ample hours of daylight. These conditions make June through September an optimal period for travel. The temperatures during this period sit between a comfortable 75.7°F (24.3°C) and 86.5°F (30.3°C), while the rainfall averages at around 1.61" (41mm) per month. Furthermore, daylight stretches from 14.3 hours to 14.8 hours per day, offering ample time for outdoor exploration and recreational activities.

The worst time to visit Jeffersontown

Considering fluctuations in the climatic conditions, the least desirable time to visit would be the cold season running from December to February. Temperatures plunge to a chilly range from 39°F (3.9°C) to 26.1°F (-3.3°C). Additionally, snowfall of up to 0.67" (17mm) occurs, with up to 5.9 snowfall days within the month. Sunlight also sees a decrease, with daylight lasting for just 9.6 to 10.8 hours a day. On top of these, traveling during these months means bracing for the year's highest relative humidity, reaching a peak of 80% in February, which increases the feeling of cold.

Spring weather in Jeffersontown

Spring in Jeffersontown extends from March through May. During this period, the city begins to shed its winter coolness, with temperatures climbing steadily from 54.1°F (12.3°C) up to 75.7°F (24.3°C). Rainfall augments slightly and ranges from 1.34" (34mm) to 2.05" (52mm) per month. The relative humidity varies minimally from 75% to 78%, and daylight begins extending, running from 12 to 14.3 hours per day.

Summer weather in Jeffersontown

Summers in Jeffersontown sprinkle the city with warmth from June to August. The mercury vacillates between a pleasant 75.7°F (24.3°C) up to a scorching high of 86.5°F (30.3°C). The relative humidity decreases slightly but still occupies the range between a constant 73% and 74%. Rainfall, while still present, plunges to an average of 1.61" (41mm) in the peak summer month of June. Achieving the pinnacle of daylight length, the region baulks in daylight for up to a blinding 14.8 hours a day during the heart of the summer.

Autumn weather in Jeffersontown

The city of Jeffersontown embraces autumn from September to November. Temperatures moderate from a warmer 79.3°F (26.3°C) down to a cooler 53.2°F (11.8°C). The average rainfall inches up to 1.46" (37mm) in October but otherwise maintains a uniform volume across the months. The length of daylight gradually recedes from 12.4 to 10.1 hours. It is worth noting the slight increase in relative humidity in this season, moving between 74% and 76%.

Winter weather in Jeffersontown

Jeffersontown sees winter descend from December through February. Recordings of temperature have marked a distinct decline in this phase, dropping from 44.1°F (6.7°C) to a low 26.1°F (-3.3°C). Rainfall levels taper off slightly to 1.26" (32mm) in December but remain steady in the subsequent months. A notable increase in the snowfall is observed, rising to a peak of 0.67" (17mm) in February. Coexisting with the chill of winter is a dip in daylight hours, dawdling from 9.6 to just 9.9 hours.

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%. Weather in January »

Weather in February

As spring approaches, February heralds a slight rise in temperatures. Compared to January, the lower temperatures rise to 29.1°F (-1.6°C), while upper temperatures reach 44.1°F (6.7°C). Despite the slightly warmer days, snowfall persists, adding to the winter ambience. Weather in February »

Weather in March

March sees a significant transformation in Jeffersontown's weather landscape. There is an evident increase in temperatures ranging from 37.6°F (3.1°C) to 54.1°F (12.3°C) and a shift to predominantly rainy days. The changing weather, with more rain and less snow, provides an environment conducive to the blossoming of spring flowers. Weather in March »

Weather in April

April in Jeffersontown witnesses a considerable increase in temperatures, with low averages of 47.7°F (8.7°C) and highs of 66.4°F (19.1°C). The spring takes over completely as snowfall disappears, replaced by increased rainfall at 2.05" (52mm). Weather in April »

Weather in May

May weather in Jeffersontown is characterized by a pleasant rise in temperatures. The mercury levels fluctuate between a low of 57°F (13.9°C) and a high of 75.7°F (24.3°C). With zero snowfall, rainfall dominates the month at 2.05" (52mm), keeping the surroundings lush and green. Weather in May »

Weather in June

June unveils the summer season in Jeffersontown with the temperature swinging between 64.2°F (17.9°C) and 84°F (28.9°C). This month provides the longest daylight hours, uplifting the spirits of the town residents. The absence of snowfall and relative humidity at 74% makes it an ideal time for summer activities and events. Weather in June »

Weather in July

July showcases the peak of summer in Jeffersontown, with the highest temperature reaching 86.5°F (30.3°C) and the lows around 67.6°F (19.8°C). It also brings with it the highest ultraviolet index of 6, necessitating protective measures for outdoor activities. Weather in July »

Weather in August

August continues to uphold the summer season with highs of 85.6°F (29.8°C) and a slightly reduced low of 65.8°F (18.8°C). The month experiences less rainfall at 1.54" (39mm), resulting in drier days. Even though there is a slight decrease in daylight hours compared to July, the town displays vibrant summer energy with numerous outdoor activities in play. The initiation of August records an average high-temperature of a moderately hot 85.6°F (29.8°C), displaying a near consistency with the previous month. Weather in August »

Weather in September

September brings a gradual cooling trend with temperatures declining to a maximum of 79.3°F (26.3°C) and a minimum of 59.9°F (15.5°C). The town experiences the least rainfall of the year at 0.87" (22mm). As the transition from summer to autumn starts, the weather becomes more comfortable. Weather in September »

Weather in October

October brings about a perceptible plunge in temperatures, signaling the onset of autumn in Jeffersontown. The crisp chill in the air justifies the need for light sweaters, with high temperatures of 66.9°F (19.4°C) and low temperatures landing at 48.6°F (9.2°C). Weather in October »

Weather in November

November’s weather in Jeffersontown triggers the switch between autumn and winter, signified by temperatures ranging from 37.8°F (3.2°C) to 53.2°F (11.8°C). A small but noticeable re-emergence of snowfall is observed. This transition month is marked by falling leaves and shorter daylight hours, setting a slow pace for life in the town. Weather in November »

Weather in December

In December, winter firmly establishes itself with an average high of 44.1°F (6.7°C) and a low of 32°F (0°C). A noticeable increase in snowfall at 0.39" (10mm) ushers in the winter wonderland imagery. The drop in temperature, amplified by longer nights, makes indoor activities more prevalent. Weather in December »
Updated: Aug 20, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the coldest time of year?

The coldest temperatures occur during January, when averages reach a peak of 39°F (3.9°C) and a low of 26.1°F (-3.3°C).

How much does it rain?

In Jeffersontown, during the entire year, the rain falls for 140.3 days and collects up to 18.31" (465mm) of precipitation.

When does it snow?

January through April, November and December are months with snowfall.

How many days does it snow in Jeffersontown?

Throughout the year, there are 19.9 snowfall days, and 2.44" (62mm) of snow is accumulated.

What is the month with the lowest UV index?

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

What is the most humid month?

February is the most humid month, with an average relative humidity of 80%.

What is the snowiest month?

The month with the most snowfall is February, when snow falls for 5.9 days and typically aggregates up to 0.67" (17mm) of snow.

When is Daylight Saving Time (DST)?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.

What is the rainiest month?

The months with the most rainfall are April and May, with an average 2.05" (52mm) of precipitation.

When it does not snow?

May through October are months without snowfall.

When are the longest days?

June has the longest days of the year, with an average of 14h and 48min of daylight.

What month has the most sunshine?

June has the most sunshine of the year, with an average of 10.4h of sunshine.

When is the highest UV index?

June through August, with an average maximum UV index of 6, are months with the highest UV index.

What month is the hottest?

Jeffersontown's July weather, marked by an average high temperature of 86.5°F (30.3°C) and an average low temperature of 67.6°F (19.8°C), is the warmest in the year.

What is the least humid month?

With an average relative humidity of 73%, August is the least humid month.

What is the driest month?

The month with the least rainfall is September, when the rain falls for 11.3 days and typically collects 0.87" (22mm) of precipitation.

What is the month with the shortest days?

With an average of 9h and 36min of daylight, December has the shortest days of the year.

What is the month with the least sunshine?

With an average of 4.3h of sunshine, December has the least sunshine of the year.
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Average temperature
Jeffersontown, KY

Average temperature - Jeffersontown, KY

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).

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).

Average pressure
Jeffersontown, KY

Average pressure - Jeffersontown, KY

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

Average wind speed
Jeffersontown, KY

Average wind speed - Jeffersontown, KY

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).

Average humidity
Jeffersontown, KY

Average humidity - Jeffersontown, KY

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

Average rainfall
Jeffersontown, KY

Average rainfall - Jeffersontown, KY

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

Average rainfall days
Jeffersontown, KY

Average rainfall days - Jeffersontown, KY

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).

Average snowfall
Jeffersontown, KY

Average snowfall - Jeffersontown, KY

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").

Average snowfall days
Jeffersontown, KY

Average snowfall days - Jeffersontown, KY

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).

Average daylight / Average sunshine
Jeffersontown, KY

Average daylight / Average sunshine - Jeffersontown, KY

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).

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).

Average sunshine days
Jeffersontown, KY

Average sunshine days - Jeffersontown, KY

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

Average UV index
Jeffersontown, KY

Average UV index - Jeffersontown, KY

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).

Average cloud cover
Jeffersontown, KY

Average cloud cover - Jeffersontown, KY

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

Average visibility
Jeffersontown, KY

Average visibility - Jeffersontown, KY

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).

Jeffersontown, Kentucky, USA

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