Climate Chart of Charleston, USA

Monthly data: Temperature °C, Rain (mm), Sunshine (h) · 2013–2023

Climate overview

Temperature

The coolest monthly mean temperature is 1.9 °C in January, while the warmest is 24.5 °C in July. These are monthly averages, not daytime highs or lows, so temperatures on an individual visit may differ. Across the calendar months, the unweighted mean of monthly mean temperatures is 13.8 °C; it summarizes the monthly averages without weighting them by the number of days in each month.

Rain

Mean daily rainfall is lowest at 2.35 mm/day in November and highest at 4.51 mm/day in July. These figures describe average daily amounts for each month, not monthly rainfall totals, and they do not indicate how often rain falls. The unweighted mean across the monthly daily means is 3.37 mm/day. Even in the lower-rainfall month, the average cannot guarantee dry weather for a particular outing.

Sunshine

Average daily sunshine reaches its highest supplied monthly mean at 11.09 hours/day in June and its lowest at 4.80 hours/day in December. Sunshine duration can help with broad outdoor-planning expectations, but it is not the same as day length and does not promise clear skies on a specific day. The unweighted mean across monthly sunshine means is 8.18 hours/day per day.

Snow

The highest monthly mean daily snowfall in the supplied data is 4.32 mm/day in February; the unweighted mean across monthly daily snowfall means is 1.20 mm/day. These are average daily amounts, not monthly totals. They do not establish how many days have snow, snow depth, lasting snow cover, or whether conditions suit skiing, so visitors should not treat them as a forecast of snow on the ground.

Best Travel Time Guide for Charleston, USA: Ideal Seasons and Weather Insights

For visitors prioritising lower average rainfall, November is the conditional option in the supplied figures, with mean daily rainfall of 2.35 mm/day. Rain preparation is especially relevant for July, when the mean daily amount is 4.51 mm/day; neither average tells you whether rain will fall during your visit or how long a wet spell might last. Check the forecast near departure and bring adaptable rain protection rather than assuming either month will be consistently dry or wet. If cooler monthly averages are your priority, consider January, whose monthly mean temperature is 1.9 °C; this is an average, not a daytime minimum or a guarantee of cool weather on every day. For outdoor sightseeing planned around sunshine, June has the highest mean daily sunshine duration at 11.09 hours/day, while December has the lowest at 4.80 hours/day. Sunshine duration is not day length, and these separate criteria do not combine into a universal best time to visit. The recorded snowfall mean for February is 4.32 mm/day per day, but that average cannot establish snow cover or particular ground conditions.

Climate Data Overview for Charleston, USA

Explore the comprehensive climate data for Charleston, USA. This detailed table provides valuable insights into temperature variations, precipitation levels, and seasonal changes, helping you understand the unique weather patterns of this region.

• See also climate change in Charleston
• Explore the climate in USA