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Average Weather in July in Shepherdsville Kentucky, United States

In Shepherdsville, the month of July is characterized by essentially constant daily high temperatures, with daily highs around 87°F throughout the month, rarely exceeding 94°F or dropping below 80°F. The highest daily average high temperature is 88°F on July 21.

Daily low temperatures are around 70°F, rarely falling below 61°F or exceeding 76°F. The highest daily average low temperature is 71°F on July 22.

For reference, on July 21, the hottest day of the year, temperatures in Shepherdsville typically range from 71°F to 88°F, while on January 29, the coldest day of the year, they range from 28°F to 43°F.

Average High and Low Temperature in July

The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on July. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Average Hourly Temperature in July

Average Hourly Temperature in July in Shepherdsville12 AM4 AM8 AM12 PM4 PM8 PM12 AM181522291122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930303131JunAugcoolcomfortablewarmhot
The average hourly temperature, color coded into bands: frigid < 15°F < freezing < 32°F < chilly < 45°F < cold < 55°F < cool < 65°F < comfortable < 75°F < warm < 85°F < hot < 95°F < sweltering. The shaded overlays indicate night and civil twilight.

Clouds

The month of July in Shepherdsville experiences decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 43% to 34%.

The clearest day of the month is July 31, with clear, mostly clear, or partly cloudy conditions 66% of the time.

For reference, on January 2, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 57%, while on August 23, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 68%.

Cloud Cover in July

The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds: clear < 20% < mostly clear < 40% < partly cloudy < 60% < mostly cloudy < 80% < overcast.

Precipitation

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Shepherdsville, the chance of a wet day over the course of July is decreasing, starting the month at 38% and ending it at 33%.

For reference, the year's highest daily chance of a wet day is 41% on May 28, and its lowest chance is 23% on October 15.

Probability of Precipitation in July

The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).

Rainfall

To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during July in Shepherdsville is decreasing, starting the month at 3.6 inches, when it rarely exceeds 5.8 inches or falls below 1.6 inches, and ending the month at 3.1 inches, when it rarely exceeds 5.1 inches or falls below 1.2 inches.

Average Monthly Rainfall in July

The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average liquid-equivalent snowfall.

Sun

Over the course of July in Shepherdsville, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 38 minutes, implying an average daily decrease of 1 minute, 16 seconds, and weekly decrease of 8 minutes, 50 seconds.

The shortest day of the month is July 31, with 14 hours, 7 minutes of daylight and the longest day is July 1, with 14 hours, 45 minutes of daylight.

Hours of Daylight and Twilight in July

The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The earliest sunrise of the month in Shepherdsville is 6:24 AM on July 1 and the latest sunrise is 21 minutes later at 6:45 AM on July 31.

The latest sunset is 9:09 PM on July 1 and the earliest sunset is 17 minutes earlier at 8:52 PM on July 31.

Daylight saving time is observed in Shepherdsville during 2017, but it neither starts nor ends during July, so the entire month is in daylight saving time.

For reference, on June 21, the longest day of the year, the Sun rises at 6:20 AM and sets 14 hours, 48 minutes later, at 9:08 PM, while on December 21, the shortest day of the year, it rises at 7:55 AM and sets 9 hours, 32 minutes later, at 5:26 PM.

Sunrise & Sunset with Twilight in July

The solar day over the course of July. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray.

Humidity

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

The chance that a given day will be muggy in Shepherdsville is gradually increasing during July, rising from 62% to 67% over the course of the month.

The highest chance of a muggy day during July is 70% on July 25.

For reference, on July 24, the muggiest day of the year, there are muggy conditions 70% of the time, while on January 1, the least muggy day of the year, there are muggy conditions 0% of the time.

Humidity Comfort Levels in July

Humidity Comfort Levels in July in Shepherdsville0%10%20%30%40%50%60%70%80%90%100%181522291122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930303131JunAugJul 2570%Jul 2570%Jul 162%Jul 162%Jul 1167%Jul 1167%oppressiveoppressivemuggymuggyhumidhumidcomfortablecomfortabledrydrymiserablemiserable
The percentage of time spent at various humidity comfort levels, categorized by dew point: dry < 55°F < comfortable < 60°F < humid < 65°F < muggy < 70°F < oppressive < 75°F < miserable.

Wind

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed in Shepherdsville is essentially constant during July, remaining within 0.1 miles per hour of 2.9 miles per hour throughout.

For reference, on February 25, the windiest day of the year, the daily average wind speed is 4.8 miles per hour, while on July 31, the calmest day of the year, the daily average wind speed is 2.7 miles per hour.

Average Wind Speed in July

The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.
The hourly average wind direction in Shepherdsville throughout July is predominantly from the west, with a peak proportion of 37% on July 13.

Wind Direction in July

Wind Direction in July in ShepherdsvilleSWS0%20%40%60%80%100%181522291122334455667788991010111112121313141415151616171718181919202021212222232324242525262627272828292930303131JunAugwestsoutheastnorth
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions (north, east, south, and west), excluding hours in which the mean wind speed is less than 1 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Solar Energy

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy in Shepherdsville is essentially constant during July, remaining around 6.6 kWh throughout.

The highest average daily incident shortwave solar energy during July is 6.6 kWh on July 10.

Average Daily Incident Shortwave Solar Energy in July

The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

Topography

For the purposes of this report, the geographical coordinates of Shepherdsville are 37.988 deg latitude, -85.716 deg longitude, and 453 ft elevation.

The topography within 2 miles of Shepherdsville contains only modest variations in elevation, with a maximum elevation change of 305 feet and an average elevation above sea level of 452 feet. Within 10 miles contains only modest variations in elevation (597 feet). Within 50 miles contains significant variations in elevation (928 feet).

The area within 2 miles of Shepherdsville is covered by artificial surfaces (73%), cropland (16%), and trees (11%), within 10 miles by trees (67%) and cropland (19%), and within 50 miles by cropland (49%) and trees (44%).

Data Sources

This report illustrates the typical weather in Shepherdsville year round, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

Temperature and Dew Point

There are 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Shepherdsville.

For each station, the records are corrected for the elevation difference between that station and Shepherdsville according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.

The estimated value at Shepherdsville is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Shepherdsville and a given station.

The stations contributing to this reconstruction are: Standiford Field (54%, 22 kilometers, north); Godman Army Airfield (41%, 24 kilometers, southwest); and Stuart Powell Field (6%, 95 kilometers, southeast).

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , by Jean Meeus.

All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.

Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.

Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.

Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .

Time zones for aiports and weather stations are provided by AskGeo.com .

Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.