July Weather at Santee Cooper Regional Airport South Carolina, United States
Daily high temperatures are around 91°F, rarely falling below 84°F or exceeding 97°F. The highest daily average high temperature is 91°F on July 16.
Daily low temperatures are around 72°F, rarely falling below 66°F or exceeding 77°F. The highest daily average low temperature is 72°F on July 18.
For reference, on July 14, the hottest day of the year, temperatures at Santee Cooper Regional Airport typically range from 72°F to 91°F, while on January 17, the coldest day of the year, they range from 37°F to 57°F.
Average High and Low Temperature in July at Santee Cooper Regional Airport
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 at Santee Cooper Regional Airport
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 month of July at Santee Cooper Regional Airport experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 50% throughout the month. The highest chance of overcast or mostly cloudy conditions is 52% on July 13.
The clearest day of the month is July 1, with clear, mostly clear, or partly cloudy conditions 51% of the time.
For reference, on July 12, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 52%, while on October 27, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 66%.
Cloud Cover Categories in July at Santee Cooper Regional Airport
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. At Santee Cooper Regional Airport, the chance of a wet day over the course of July is rapidly increasing, starting the month at 45% and ending it at 51%.
For reference, the year's highest daily chance of a wet day is 52% on August 5, and its lowest chance is 18% on October 30.
Probability of Precipitation in July at Santee Cooper Regional Airport
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 at Santee Cooper Regional Airport is gradually increasing, starting the month at 4.0 inches, when it rarely exceeds 6.1 inches or falls below 2.0 inches, and ending the month at 4.4 inches, when it rarely exceeds 7.0 inches or falls below 2.2 inches.
Average Monthly Rainfall in July at Santee Cooper Regional Airport
Over the course of July at Santee Cooper Regional Airport, the length of the day is decreasing. From the start to the end of the month, the length of the day decreases by 32 minutes, implying an average daily decrease of 1 minute, 4 seconds, and weekly decrease of 7 minutes, 25 seconds.
The shortest day of the month is July 31, with 13 hours, 49 minutes of daylight and the longest day is July 1, with 14 hours, 21 minutes of daylight.
Hours of Daylight and Twilight in July at Santee Cooper Regional Airport
The earliest sunrise of the month at Santee Cooper Regional Airport is 6:14 AM on July 1 and the latest sunrise is 18 minutes later at 6:32 AM on July 31.
The latest sunset is 8:34 PM on July 1 and the earliest sunset is 14 minutes earlier at 8:21 PM on July 31.
Daylight saving time is observed at Santee Cooper Regional Airport during 2021, 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 6:11 AM and sets 14 hours, 23 minutes later, at 8:34 PM, while on December 21, the shortest day of the year, it rises at 7:21 AM and sets 9 hours, 55 minutes later, at 5:16 PM.
Sunrise & Sunset with Twilight in July at Santee Cooper Regional Airport
The figure below presents a compact representation of key lunar data for July 2021. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.
Moon Rise, Set & Phases in July at Santee Cooper Regional Airport
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 at Santee Cooper Regional Airport is increasing during July, rising from 88% to 95% over the course of the month.
The highest chance of a muggy day during July is 96% on July 23.
For reference, on July 23, the muggiest day of the year, there are muggy conditions 96% of the time, while on January 31, the least muggy day of the year, there are muggy conditions 0% of the time.
Humidity Comfort Levels in July at Santee Cooper Regional Airport
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
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 at Santee Cooper Regional Airport is essentially constant during July, remaining within 0.2 miles per hour of 6.1 miles per hour throughout.
For reference, on March 9, the windiest day of the year, the daily average wind speed is 8.5 miles per hour, while on August 9, the calmest day of the year, the daily average wind speed is 5.8 miles per hour.
Average Wind Speed in July at Santee Cooper Regional Airport
The hourly average wind direction at Santee Cooper Regional Airport throughout July is predominantly from the south, with a peak proportion of 44% on July 14.
Wind Direction in July at Santee Cooper Regional Airport
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 at Santee Cooper Regional Airport typically lasts for 7.7 months (237 days), from around March 20 to around November 12, rarely starting before March 1 or after April 14, and rarely ending before October 26 or after December 3.
The month of July at Santee Cooper Regional Airport is reliably fully within the growing season.
Time Spent in Various Temperature Bands and the Growing Season in July at Santee Cooper Regional Airport
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
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 at Santee Cooper Regional Airport are rapidly increasing during July, increasing by 869°F, from 2,412°F to 3,281°F, over the course of the month.
Growing Degree Days in July at Santee Cooper Regional Airport
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 at Santee Cooper Regional Airport is essentially constant during July, remaining within 0.2 kWh of 6.1 kWh throughout.
Average Daily Incident Shortwave Solar Energy in July at Santee Cooper Regional Airport
For the purposes of this report, the geographical coordinates of Santee Cooper Regional Airport are 33.588 deg latitude, -80.207 deg longitude, and 95 ft elevation.
The topography within 2 miles of Santee Cooper Regional Airport is essentially flat, with a maximum elevation change of 56 feet and an average elevation above sea level of 100 feet. Within 10 miles is essentially flat (151 feet). Within 50 miles contains only modest variations in elevation (535 feet).
The area within 2 miles of Santee Cooper Regional Airport is covered by cropland (42%), trees (35%), and artificial surfaces (15%), within 10 miles by trees (37%) and cropland (30%), and within 50 miles by trees (49%) and cropland (27%).
This report illustrates the typical weather at Santee Cooper Regional Airport, 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
Santee Cooper Regional Airport has a weather station that reported reliably enough during the analysis period that we have included it in our network. When available, historical temperature and dew point measurements are taken directly from this weather station. These records are obtained from NOAA's Integrated Surface Hourly data set, falling back on ICAO METAR records as required.
In the case of missing or erroneous measurements from this station, we fall back on records from nearby stations, adjusted according to typical seasonal and diurnal intra-station differences. For a given day of the year and hour of the day, the fallback station is selected to minimize the prediction error over the years for which there are measurements for both stations.
The stations on which we may fall back include but are not limited to Williamsburg Regional Airport, Berkeley County Airport, Sumter Airport, Shaw Air Force Base, Summerville Airport, Orangeburg Municipal Airport, McEntire Air National Guard Weather Facility Base, and Charleston International Airport.
All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , 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 airports 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.
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.