Charleston receives its highest rainfall in Jul, while humidity peaks during winter months.
🌧️ Wettest:Jul — 117 mm☀️ Driest:Oct — 75 mm
💧 Humidity peaks at 85% in Jan · annual avg 76%
🌍 Climate Summary
Avg Annual Temp:55.2°F
Avg Annual Rainfall:1085 mm
Avg Humidity:76%
Data Period:1981 – 2025
Charleston Climate Overview
Charleston has a warm temperate climate with warm summers and freezing winters.
Temperatures peak in Jul and drop to their lowest in Jan,
while rainfall is highest during summer months.
Humidity remains high throughout the year, especially during winter months, creating cold and damp conditions.
📈 Yearly Trends
The warmest year in Charleston's recorded history was 2023
(avg: 58.8°F),
while the coldest year was 1989
(avg: 52.3°F),
based on annual average temperatures.
📊 Key Climate Trends
🌡️ Charleston's temperature shows a slight warming trend over the past decade
📈 Minimum temperatures show a slight warming trend in recent years
🌧️ Rainfall has decreased in recent years compared to earlier periods
🌡️ Annual Temperature Trend
View Range:
Average annual high/low · Last 10 years · °F
Charleston's temperatures shows a slight warming trend over the past decade.
The highest recorded temperature reached
105.6°F in Jul 2012,
while the lowest dropped to
-13.5°F in Jan 1982.
🌧️ Annual Precipitation
View Range:
Total annual precipitation · Last 10 years · mm/year
Annual rainfall in Charleston shows noticeable variation. Rainfall has decreased in recent years compared to earlier periods.
Based on 45 years of data (1981–2025), Jul is typically the hottest month in Charleston, West Virginia, with average high temperatures around 96.2°F.
What is the coldest month in Charleston?▼
Jan is the coldest month in Charleston, with average low temperatures around 6.7°F.
What is the rainiest month in Charleston?▼
Jul receives the most rainfall with approximately 117 mm, while Oct is the driest with 75 mm.
What was the highest temperature ever recorded in Charleston?▼
The highest recorded temperature was 105.6°F in Jul 2012. This is part of the historical record spanning 1981–2025.
What was the lowest temperature ever recorded in Charleston?▼
The lowest recorded temperature was -13.5°F in Jan 1982.
How many years of data does this page cover?▼
This page covers 45 years of climate data from 1981 to 2025. As new data is added to the database the page automatically reflects the updated coverage.
How much sunlight does Charleston get?▼
Charleston receives the most sunlight in Jun with an average solar radiation of 6.06 kWh/m²/day. This solar radiation data, sourced from NASA POWER, is useful for solar energy planning, agriculture, and understanding seasonal sunshine availability in West Virginia.
Where does this weather data come from?▼
All climate data is sourced from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite and model data. It provides monthly averages for temperature, precipitation, humidity, wind speed, and solar radiation.
📚 Data Source
All weather data is sourced from NASA POWER (Prediction of Worldwide Energy Resources), a NASA project providing solar and meteorological data for renewable energy, building efficiency, and agricultural research.