Based on this score, the best time of year to visit Charleston for general outdoor tourist activities is from mid July to late September , with a peak score in the first week of September. Based on this score, the best time of year to visit Charleston for hot-weather activities is from late June to early September , with a peak score in the last week of July. For each hour between AM and PM of each day in the analysis period to , independent scores are computed for perceived temperature, cloud cover, and total precipitation.
Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed. Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.
Our precipitation score , which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0. The growing season in Charleston typically lasts for 6. 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.
Based on growing degree days alone, the first spring blooms in Charleston should appear around March 8 , only rarely appearing before February 18 or after March 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 experiences significant seasonal variation over the course of the year. The brighter period of the year lasts for 4. The brightest month of the year in Charleston is June , with an average of 6. The darker period of the year lasts for 3.
The darkest month of the year in Charleston is December , with an average of 1. For the purposes of this report, the geographical coordinates of Charleston are The topography within 2 miles of Charleston contains significant variations in elevation, with a maximum elevation change of feet and an average elevation above sea level of feet.
Within 10 miles contains significant variations in elevation 1, feet. Within 50 miles contains very significant variations in elevation 3, feet.
This report illustrates the typical weather in Charleston, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, to December 31, There are 4 weather stations near enough to contribute to our estimation of the temperature and dew point in Charleston.
For each station, the records are corrected for the elevation difference between that station and Charleston 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 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.
To get a sense of how much these sources agree with each other, you can view a comparison of Charleston and the stations that contribute to our estimates of its temperature history and climate. Please note that each source's contribution is adjusted for elevation and the relative change present in the MERRA-2 data.
All data relating to the Sun's position e. 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 kilometer grid. 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. 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.
Please review our full terms contained on our Terms of Service page. You're permitted to use this graph as long as you provide prominent attribution with a link back close to the use of the graph.
For print usage, please acquire a license. Full Year. Spring Summer Fall Winter. Climate in Charleston Link. History: Charleston weather by month. Click on each chart for more information.
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. Average Hourly Temperature in Charleston Link. The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight. Compare Charleston to another city:. Cloud Cover Categories in Charleston Link. The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds.
Daily Chance of Precipitation in Charleston Link. 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. Average Monthly Rainfall in Charleston Link. The average rainfall solid line accumulated over the course of a sliding 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 snowfall. Average Monthly Snowfall in Charleston Link. The average snowfall solid line accumulated over the course of a sliding 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 rainfall. Hours of Daylight and Twilight in Charleston Link. 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 solar day over the course of the year 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.
The transitions to and from daylight saving time are indicated by the 'DST' labels. The time in which the moon is above the horizon light blue area , with new moons dark gray lines and full moons blue lines indicated. Charleston experiences extreme seasonal variation in the perceived humidity. Autumn is mild in the early and middle season, and the foliage is colorful.
Overall, the period from May to October is the best time to visit West Virginia - though, keep in mind that summer is also the peak tourist season and draws large crowds. The mountain climate in the eastern region is colder than the rest of the state during peak summer, which is an excellent time for hiking and backpacking.
Winter is the worst time to visit West Virginia as the weather is cold, and temperatures are below freezing. Fog is a constant companion as the cloudy skies hide the sun for many days. Snow and rain both are persistent during the winter, and the roads are icy. Winter is a slow season for tourism but attracts some visitors for activities like skiing, snowshoeing, and snowmobiling.
West Virginia receives 40" mm to " mm of snow in the various regions of the state. West Virginia is usually calm, but thunderstorms occasionally occur in late spring and early summer. Tornadoes hit the state but in lesser numbers and low intensity as the winds find strong barriers in the form of high mountain ranges. Summer experiences heavy rain and hailstorms are not entirely unexpected in the state.
Snowstorms are common during the winter, although they lack the strength of those in the other parts of the country. January is the coldest month of the year in West Virginia as the temperatures plummet to the frigid zones.
January is the snowiest month with an average of 10" mm to 15" mm ; Eastern regions like Snowshoe, Elkins, Bartow, Marlinton, and Seneca State Forest accumulate significantly higher amounts of snow over the average. The snow is sufficient for exciting winter activities like dogsledding, snowshoeing, and sleigh riding, among others. Rain is a regular host in West Virginia, and January is no exception with 4" Though winter has a range of activities, the tourist numbers dwindle in January, and off-season discounts are common.
Note that most of the mountain trails remain closed during the winter as do some of the state parks, and it is rightly so, as the sunshine is scarce and the roads are icy. The eastern mountains block cold air masses that are unable to pass to the west side most of the time and bring severe cold to West Virginia's eastern valley regions during the winter.
Snowstorms tap the state during the winter though they are rarely destructive or deposit vast quantities of snow. The sunshine is usually bleak in February with the sun present on the horizon for hardly 10 days on an average.
Cloud coverage is almost universal in the state, along with the light but persistent rain showers. Overall, expect to have snow and ice cover on the ground in most places amid cloudy skies and rare sunny days.
No wonder that February lags the charts in popularity to visit West Virginia! March arrives with the promise of the warm temperatures of spring in West Virginia. A slight increase in rainfall is evident during the spring, while snowfall sees a slight decrease to approximately 6" Mornings are foggy, especially in the mountains, and the trails are still snowy.
Cold fronts are common in March even though the sun is in office for 13 to 14 days - the sun rays are not strong to break the cloud cover or thaw the snow. Early spring, has warm, moist days and cold nights. The landscape gradually changes from the wintry white to bring in specks of green as the sunlight gathers strength by the end of March.
Pack in layered clothing, preferably with a raincoat, for availing early bird discounts, as the tourist season has not yet picked up. April sees the advent of spring in West Virginia with warm days and mild nights. Spring smells of freshwater and blossoming flowers like honeysuckles and rhododendrons in the background of greenery everywhere. Rain is persistent, but snowfall is almost over with the end of winter. Traces of snow is common in the mountains, but the lowlands are almost free of any fresh deposits.
Creeks, streams, lakes, and rivers gather fresh water from the melting of snow. While the roaring freshwater entices people, note that the water is mostly cold and better for kayaking or fishing instead of swimming! April is a shoulder season for tourism that sees a rise in visitor numbers.
May sees warm temperatures in West Virginia with comfortable days and nights as the spring weather blesses the state. Sunshine increases in the state, especially in the southern part, as the average number of days with sunshine increases to Rainfall is to the tune of 4" Mountain trails are open everywhere by the end of spring, and there is a buzz of activities like white water rafting, hiking, and biking.
The first of the thunderstorms are likely to hit in May, so be cautious in the highlands where there is no cover from the rain! Mid to late spring is the start of the peak tourist season and the resultant swelling of crowds in West Virginia. June is beautiful, with many sunny days and one of the best times to visit West Virginia.
The usually cloudy skies give way to sunshine as the daylight lasts over 12 hours. Rainfall is to the tune of 5" mm , and thunderstorms are common, especially in the high plateau regions. An umbrella or a raincoat is a useful accessory in the bag while exploring the highlands and state parks. June sees a crowd encompassing the Monongahela National Forest area as the weather is excellent for hiking, backpacking, and hunting. Note that flooding occasionally occurs in West Virginia due to heavy rainfall and melting of snow.
July is undoubtedly the hottest and most humid month of the year in West Virginia. Most of the state receives ample rain in the range of 5" mm to 7" Camping in the mountains is a popular activity during the summer, but keep in mind that West Virginia is less favorable for stargazing as it rarely offers clear skies for long stretches.
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