July weather forecast
Louisville, KY

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Louisville city at dusk, Kentucky
Louisville city at dusk, Kentucky

Weather in July

Louisville, Kentucky sails into the peak of its summer, with July boasting of the highest temperatures of the year, reaching up to 87.1°F (30.6°C). This is supplemented by the longest stretch of daylight hours, taking sun-drenched days up to approximately 14.5 hours. The rainfall increases slightly to 1.89" (48mm), keeping the environment fresh and lively. Notably, wind gusts reach their minimla level of 7.8mph (12.6km/h), contributing to the hot, calm weather that characterizes Louisville in July.

Temperature

July, with its average high-temperature of 87.1°F (30.6°C) and an average low-temperature of 67.5°F (19.7°C), holds the record as the warmest month.

Heat index

The heat index value for July is calculated to be a torrid 100.4°F (38°C). Special measures are necessary to avoid heat cramps and heat exhaustion. Persistent activity could result in heatstroke.
Heat index guidelines indicate values are for light wind scenarios and shaded regions. The heat index might be elevated by 15 Fahrenheit (8 Celsius) degrees due to direct sun exposure.
Note: The heat index, also known as 'real feel' or 'feels like', ties air temperature with relative humidity to produce the perceived temperature sensation. The effect of weather is individual, with a variety of people experiencing it differently due to distinctions in body mass, height, and level of activity. One must note that being under the direct sun can escalate the heat's effects, with the heat index possibly rising by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
Perspiring is how the human body naturally cools down, as sweat's evaporation takes away excess heat. With higher relative humidity, the rate of evaporation is reduced, resulting in increased heat retention in the body compared to drier air. Increasing body temperatures can be a precursor to dehydration if the body can't shed the extra heat.

Humidity

In Louisville, the average relative humidity in July is 75%.

Rainfall

The months with the most rainfall in Louisville are May and July, with an average 1.89" (48mm) of precipitation.

Snowfall

In Louisville, snow does not fall in May through October.

Daylight

The average length of the day in July is 14h and 31min.
On the first day of the month, sunrise is at 6:23 am and sunset at 9:10 pm. On the last day of July, sunrise is at 6:45 am and sunset at 8:53 pm EDT.

Sunshine

The months with the most sunshine in Louisville, Kentucky, are June and July, with an average of 10.4h of sunshine.

UV index

The months with the highest UV index in Louisville are May through August, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to Sun's UV rays for average individuals.
Note: The daily maximum UV index of 6 in July interprets into the following advice:
Eschew overexposure. Those with light skin may suffer burns in fewer than 20 minutes. Avoid direct Sun exposure and seek shade from 10 a.m. to 4 p.m., the period of highest UV radiation. Remember, however, that not all shade structures offer full protection. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
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Frequently asked questions

What time of the year is the hottest in Louisville?

Louisville's temperature records reveal July as the warmest month, marked by average highs of 87.1°F (30.6°C) and lows of 67.5°F (19.7°C).

How hot does it get in Louisville in July?

July temperatures in Louisville, Kentucky, vary between a high-temperature of 87.1°F (30.6°C) and a low-temperature of 67.5°F (19.7°C). The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which represents the influence of relative humidity on air temperature, in July is calculated to be 100.4°F (38°C).

What is the average humidity in July in Louisville?

In July, the average relative humidity in Louisville is 75%.

What is the wettest month in Louisville?

The wettest months in Louisville are May and July, with an average 1.89" (48mm) of rainfall.

How much does it rain in Louisville in July?

In Louisville, Kentucky, in July, it is raining for 15.5 days, with typically 1.89" (48mm) of accumulated precipitation.

When it does not snow in Louisville?

May through October are months without snowfall in Louisville.

What is the average length of the day in July in Louisville?

In July, the average day length in Louisville is 14h and 31min.

When are sunrise and sunset in July in Louisville?

On the first day of July, sunrise is at 6:23 am and sunset at 9:10 pm. On the last day of the month, sunrise is at 6:45 am and sunset at 8:53 pm EDT.

What are the months with the most sunshine in Louisville?

The months with the most sunshine are June and July, with an average of 10.4h of sunshine.

How many hours of sunshine does Louisville have in July?

In Louisville, Kentucky, the average sunshine duration in July is 10.4h.

What is the month with the highest UV index in Louisville?

The months with the highest UV index in Louisville are May through August, with an average maximum UV index of 6.

What is the UV index intensity in July in Louisville?

In Louisville, Kentucky, the average daily maximum UV index in July is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in July
Louisville, KY

Average temperature in July - Louisville, KY
  • Average high temperature in July: 87.1°F

The warmest month (with the highest average high temperature) is July (87.1°F).
The month with the lowest average high temperature is January (38.8°F).

  • Average low temperature in July: 67.5°F

The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (25.9°F).

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Average pressure in July
Louisville, KY

Average pressure in July - Louisville, KY
  • Average pressure in July: 29.98"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 July
Louisville, KY

Average wind speed in July - Louisville, KY
  • Average wind speed in July: 4.9mph

The windiest month (with the highest average wind speed) is January (7.8mph).
The calmest months (with the lowest average wind speed) are July and August (4.9mph).

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Average humidity in July
Louisville, KY

Average humidity in July - Louisville, KY
  • Average humidity in July: 75%

The months with the highest relative humidity are February and December (80%).
The months with the lowest relative humidity are August and October (73%).

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Average rainfall in July
Louisville, KY

Average rainfall in July - Louisville, KY
  • Average rainfall in July: 1.89"

The wettest months (with the highest rainfall) are May and July (1.89").
The driest months (with the least rainfall) are January and September (1.06").

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Average rainfall days in July
Louisville, KY

Average rainfall days in July - Louisville, KY
  • Average rainfall days in July: 15.5 days

The month with the highest number of rainy days is May (16 days).
The month with the least rainy days is February (8.9 days).

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Average snowfall in July
Louisville, KY

Average snowfall in July - Louisville, KY
  • Average snowfall in July: 0"

The month with the highest snowfall is February (1.06").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in July
Louisville, KY

Average snowfall days in July - Louisville, KY
  • Average snowfall days in July: 0 days

The month with the highest number of snowfall days is January (7.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight in July /
Average sunshine in July
Louisville, KY

Average daylight in July / Average sunshine in July - Louisville, KY
  • Average daylight in July: 14h and 3min

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 July: 10h and 2min

The months with the most sunshine are June and July (Average sunshine: 10h and 24min).
The months with the least sunshine are January and December (Average sunshine: 4h and 24min).

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Average sunshine days in July
Louisville, KY

Average sunshine days in July - Louisville, KY
  • Average sunshine days in July: 11.8 days

The month with the most sunshine days is November (19.3 days).
The month with the least sunshine days is May (11.7 days).

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Average UV index in July
Louisville, KY

Average UV index in July - Louisville, KY
  • Average UV index in July: 6

The months with the highest UV index are May, 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 July
Louisville, KY

Average cloud cover in July - Louisville, KY
  • Average cloud cover in July: 32

The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is August (Cloud cover 28).

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Average visibility in July
Louisville, KY

Average visibility in July - Louisville, KY
  • Average visibility in July: 6mi

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

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Louisville, Kentucky, USA

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