The black line is the percentage chance that a given day is within the growing season. The average hourly temperature, color coded into bands. July is the hottest month for Charleston with an average high temperature of 89.9°, which ranks it as cooler than most places in South Carolina. Averages are for Charleston Air Force Base Reporting Station, which is 10 miles from Charleston. Humidity: 88%. We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. Daytime maximum temperatures average around a muggy 29°C (83°F), whilst at night 21°C (70°F) is … The climate in Charleston during September can be summarized as hot, humid and wet. The earliest sunrise of the month in Charleston is Relative humidity measures the actual amount of moisture in the air as a percentage of the maximum amount of moisture the air can hold. Daytime maximum temperatures average around a muggy 29°C (83°F), whilst at night 21°C (70°F) is normal.On average September is the 4th wettest month of the year in Charleston with around On the flip side this corresponds to an average of 7.8 hours of sunshine per day.Map showing location of Charleston (32.77657, -79.93092) 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 bar chart below shows the average monthly peak daytime temperatures at CharlestonPlease note: these are the average peak daytime temperatures (usually around mid-afternoon) so do not show daytime / night highs and lows. Daylight saving time is observed in Charleston during 2020, but it neither starts nor ends during September, so the entire month is in daylight saving time. The number of hours during which the Sun is visible (black line).
Includes monthly temperatures, rainfall, hours of sunshine and relative humidity In Charleston, there are 4 comfortable months with high temperatures in the range of 70-85°. Get the monthly weather forecast for Charleston, SC, including daily high/low, historical averages, to help you plan ahead. The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on September. The growing season in Charleston typically lasts for The month of September in Charleston experiences gradually decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 46% to 40%. Charleston Relative Humidity (SC) Home; Weather History; South Carolina ; Charleston Relative Humidity; Relative humidity of Charleston including average monthly and annual data. High Temp: 91 °F. This section reports on the wide-area average surface temperature of that water. The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than Average monthly temperatures and weather for Charleston (SC), united-states. The average surface water temperature in Charleston is One day in Charleston, SC 11 replies; Thanksgiving Dinner in Charleston 5 replies; Advice needed on Girls weekend in Charleston (or area) 8 replies; Hop On/Off Trolley Tours 12 replies; Parking in Historic District 7 replies; 1st Trip to Charleston -- Best Plantation?

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. Charleston Weather Forecasts. Averages are for Charleston Air Force Base Reporting Station, which is 10 miles from Charleston. Charleston Weather in September. 17 replies The climate in Charleston during September can be summarized as hot, humid and wet.September is in the fall / autumn in Charleston and is typically the 4th warmest month of the year. The month of September in Charleston is reliably fully within the growing season. By September, Charleston’s weather is beginning to feel less humid than during the height of summer, but it will still be extremely humid for much of the month. All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's
Average Humidity. As might be expected, this is also the cloudiest time of the year, with cloudy or overcast weather more than half the time. Weather data is prone to errors, outages, and other defects.

9 replies; Wanting a haunted hotel experience in Charleston. The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds. Afternoon rain showers and thunderstorms are common, with a 40-50% chance of rain on any given day. The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. For the purposes of this report, the geographical coordinates of Charleston are 32.777 deg latitude, -79.931 deg longitude, and 3 ft elevation. The shaded overlays indicate night and civil twilight. Weather Underground provides local & long-range weather forecasts, weatherreports, maps & tropical weather conditions for the Charleston area. Mean Temp: 67 °F. 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.