In this report, we use a base of To see the daily range of temperatures have a look at the The graph below shows the average rainfall and number of rainy days per month.The bar chart below shows the average daily sunshine hours in CharlestonThe graph below shows the daily range of temperatures for each month.A monthly average windspeed of over 16km/h or 10mph suggests a location is fairly windy.The graph below shows the average relative humidity.Map showing location of Charleston (32.77657, -79.93092) Low Temp: 39 °F. The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands. All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, What's the weather like in Charleston, United States in September 2020? 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 average hourly temperature, color coded into bands. In Charleston, there are 4 comfortable months with high temperatures in the range of 70-85°. The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose.
Charleston is located near a large body of water (e.g., ocean, sea, or large lake). The solar day over the course of September. The tables give daily averages along with highest and lowest relative humidity levels.Relative humidity measures the actual amount of moisture in the air as a percentage of the maximum amount of moisture the air can hold. Humidity: 88%. Averages are for Charleston Air Force Base Reporting Station, which is 10 miles from Charleston. The thin dotted line is the corresponding average liquid-equivalent snowfall. Weather data is prone to errors, outages, and other defects. Daytime maximum temperatures average around a muggy 29°C (83°F), whilst at night 21°C (70°F) is … Lower dew points feel drier and higher dew points feel more humid. High Temp: 91 °F. Showing: All Year Climate & Weather Averages in Charleston. 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). 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. September is in the fall / autumn in Charleston and is typically the 4th warmest month of the year. 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.

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

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.
The average accumulated growing degree days in Charleston are 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 month of September in Charleston is reliably fully within the growing season.