Aiken (SC) Monthly Rainfall & Precipitation
This page shows both the average monthly rainfall and the number of rainy days in Aiken, South Carolina, United States of America. This average is based on long-term data collected between 1990 and 2020. Let's explore the details to provide you with a complete overview.
Aiken has a relatively rain/snowy climate with high precipitation levels, averaging 1159 mm (46 in) of rain/snowfall annually.
Monthly Precipitation Levels
The average number of days each month with precipitation (> 0.2 mm (0.01 in))
Aiken experiences moderate seasonal variation in rainfall, with monthly averages ranging from 137 mm (5.4 in) in August, the wettest month, and 64 mm (2.5 in) in October, the driest month.
August, the wettest month, has a maximum daytime temperature of 33°C (91°F). During the driest month October you can expect a temperature of 25°C (77°F). For more detailed insights into the city's temperatures, visit our Aiken Temperature page.
Annual Rainfall in the United States of America: City Comparison
The map below shows the annual precipitation across the United States of America. You can also select the different months in case you are interested in a specific month.
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Aiken vs World: Rainfall Compared
Aiken's average annual precipitation is 1159 mm (46 in). Let's compare this to some popular worldwide tourist destinations:
In Barcelona, Spain, the average annual precipitation is 620 mm (24 in), evenly distributed across the year with no extreme wet or dry seasons.
In Shanghai, China, the annual average precipitation is 1347 mm (53 in), with a humid subtropical climate.
In Brisbane, Australia, the annual precipitation is 979 mm (39 in), making it wetter than Sydney.
Ho Chi Minh City, Vietnam, receives 1955 mm (77 in) of annual rainfall, with a pronounced wet season from May to November, typical of its tropical monsoon climate.
Precipitation amounts are measured using specific gauges installed at weather stations, collecting both rain and snow and any other type of precipitation. Rainfall is measured directly in millimeters, while that from snow and ice is obtained by melting it. Automated systems often incorporate heaters to make this easier.
Information from these stations is transmitted via Wi-Fi, satellite, GPS, or telephone connections to central monitoring networks. This information is immediately updated and integrated into weather models and forecasts.
The proximity of a location to a large body of water can significantly affect its rainfall patterns:
- Ocean Influence: Coastal regions typically receive more rainfall due to the presence of moisture-laden winds from the ocean. These regions tend to have more humid climates and experience more frequent precipitation, especially in winter.
- Continental Climates: Areas further from the sea, such as inland or continental regions, experience less frequent rainfall and more extreme seasonal variations in precipitation.
- "Ginger" was the longest-lasting Atlantic tropical storm, which spun around the open ocean for 28 days in 1971.
- The world's largest snowflake was recorded in the Guinness Book of Records, at 38 cm (15 inches) wide and 20 cm (7.9 inches) thick. The snowflake fell at Fort Keogh, Montana, USA, on 28 January 1887.
- The greatest snowfall recorded was on Mt. Rainier, Washington State, USA—over 31.5 meters (103 feet) fell during the winter of 1972.
For more detailed information about Aiken (SC)'s weather, including sunshine hours, humidity levels, and temperature data, visit our Aiken (SC) Climate page.
