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Average Weather in May in Heritage Creek Kentucky, United States

Daily low temperatures increase by 9°F, from 54°F to 63°F, rarely falling below 43°F or exceeding 72°F.

For reference, on July 21, the hottest day of the year, temperatures in Heritage Creek 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 May

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 May. 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 May

Average Hourly Temperature in May in Heritage Creek18152229112233445566778899101011111212131314141515161617171818191920202121222223232424252526262727282829293030313112 AM4 AM8 AM12 PM4 PM8 PM12 AMAprJuncoldcoolcomfortablewarmcoldhotwarm
The average hourly temperature, color coded into bands: frigid < 15°F < freezing < 32°F < very cold < 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.

Xi’an, China (7,356 miles away) and Daegu, South Korea (6,881 miles) are the far-away foreign places with temperatures most similar to Heritage Creek (view comparison).

Clouds

The month of May in Heritage Creek experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 49% throughout the month. The highest chance of overcast or mostly cloudy conditions is 50% on May 27.

The clearest day of the month is May 1, with clear, mostly clear, or partly cloudy conditions 52% 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 69%.

Cloud Cover Categories in May

Cloud Cover Categories in May in Heritage Creek1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%AprJunAug 2369%Aug 2369%May 152%May 152%May 3152%May 3152%May 1151%May 1151%May 2151%May 2151%clearmostly clearpartly cloudymostly cloudyovercast
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 Heritage Creek, the chance of a wet day over the course of May is essentially constant, remaining around 40% throughout.

For reference, the year's highest daily chance of a wet day is 41% on June 6, and its lowest chance is 24% on October 25.

Probability of Precipitation in May

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 May in Heritage Creek is decreasing, starting the month at 4.7 inches, when it rarely exceeds 8.2 inches or falls below 1.9 inches, and ending the month at 4.0 inches, when it rarely exceeds 7.0 inches or falls below 1.7 inches.

The highest average 31-day accumulation is 4.7 inches on May 3.

Average Monthly Rainfall in May

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 May in Heritage Creek, the length of the day is increasing. From the start to the end of the month, the length of the day increases by 50 minutes, implying an average daily increase of 1 minute, 39 seconds, and weekly increase of 11 minutes, 35 seconds.

The shortest day of the month is May 1, with 13 hours, 48 minutes of daylight and the longest day is May 31, with 14 hours, 38 minutes of daylight.

Hours of Daylight and Twilight in May

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 latest sunrise of the month in Heritage Creek is 6:46 AM on May 1 and the earliest sunrise is 24 minutes earlier at 6:21 AM on May 31.

The earliest sunset is 8:34 PM on May 1 and the latest sunset is 25 minutes later at 8:59 PM on May 31.

Daylight saving time is observed in Heritage Creek during 2017, but it neither starts nor ends during May, 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, 49 minutes later, at 9:09 PM, while on December 21, the shortest day of the year, it rises at 7:55 AM and sets 9 hours, 31 minutes later, at 5:26 PM.

Sunrise & Sunset with Twilight in May

The solar day over the course of May. 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 Heritage Creek is very rapidly increasing during May, rising from 4% to 29% over the course of the month.

For reference, on July 24, the muggiest day of the year, there are muggy conditions 67% 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 May

Humidity Comfort Levels in May in Heritage Creek1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%10%20%30%40%50%60%70%80%90%100%AprJunMay 14%May 14%May 3129%May 3129%May 119%May 119%May 2119%May 2119%oppressiveoppressivemuggymuggyhumidhumiddrydrycomfortablecomfortable
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 Heritage Creek is decreasing during May, decreasing from 7.7 miles per hour to 6.4 miles per hour over the course of the month.

For reference, on February 25, the windiest day of the year, the daily average wind speed is 8.9 miles per hour, while on July 31, the calmest day of the year, the daily average wind speed is 5.1 miles per hour.

Average Wind Speed in May

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 Heritage Creek throughout May is predominantly from the south, with a peak proportion of 35% on May 15.

Wind Direction in May

Wind Direction in May in Heritage Creek1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%AprJunwestsoutheastnorth
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).

Growing Season

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

The growing season in Heritage Creek typically lasts for 7.1 months (217 days), from around April 2 to around November 5, rarely starting before March 13 or after April 21, and rarely ending before October 18 or after November 24.

The month of May in Heritage Creek is reliably fully within the growing season.

Time Spent in Various Temperature Bands and the Growing Season in May

Time Spent in Various Temperature Bands and the Growing Season in May in Heritage Creekgrowing season1815222911223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%AprJun100%May 16100%May 1650%Apr 250%Apr 290%Apr 2190%Apr 21very coldcoldcoolcomfortablewarmhotfreezing
The percentage of time spent in various temperature bands: frigid < 15°F < freezing < 32°F < very cold < 45°F < cold < 55°F < cool < 65°F < comfortable < 75°F < warm < 85°F < hot < 95°F < sweltering. The black line is the percentage chance that a given day is within the growing season.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

The average accumulated growing degree days in Heritage Creek are rapidly increasing during May, increasing by 510°F, from 494°F to 1,004°F, over the course of the month.

Growing Degree Days in May

The average growing degree days accumulated over the course of May, with 25th to 75th and 10th to 90th percentile bands.

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 Heritage Creek is essentially constant during May, remaining within 0.2 kWh of 6.2 kWh throughout.

Average Daily Incident Shortwave Solar Energy in May

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 Heritage Creek are 38.124 deg latitude, -85.720 deg longitude, and 466 ft elevation.

The topography within 2 miles of Heritage Creek contains significant variations in elevation, with a maximum elevation change of 512 feet and an average elevation above sea level of 491 feet. Within 10 miles also contains significant variations in elevation (535 feet). Within 50 miles also contains significant variations in elevation (804 feet).

The area within 2 miles of Heritage Creek is covered by artificial surfaces (73%) and trees (26%), within 10 miles by artificial surfaces (60%) and trees (27%), and within 50 miles by cropland (47%) and trees (46%).

Data Sources

This report illustrates the typical weather in Heritage Creek 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 2 weather stations near enough to contribute to our estimation of the temperature and dew point in Heritage Creek.

For each station, the records are corrected for the elevation difference between that station and Heritage Creek 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 Heritage Creek is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Heritage Creek and a given station.

The stations contributing to this reconstruction are: Standiford Field (92%, 7 kilometers, north) and Godman Army Airfield (8%, 33 kilometers, southwest).

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.

Disclaimer

The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.

We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.