Indianapolis (IN) Monthly Rainfall & Precipitation
This page shows both the average monthly rainfall and the number of rainy days in Indianapolis, Indiana, United States of America. The figures are based on a 30-year period (1990–2020) to provide a reliable average. Now, let's explore all the details to give you a full picture.
Indianapolis is known for its substantial rain/snowfall, with annual precipitation reaching 1202 mm (47 in).
Monthly Precipitation Levels
The average number of days each month with precipitation (> 0.2 mm (0.01 in))
Indianapolis can be quite wet during June, receiving approximately 157 mm (6.2 in) of precipitation over 15 rainy days.
In contrast February, experiences much drier conditions, with 69 mm (2.7 in) of snow/rainfall, spread across 10 snowy/rainy days.
June, the wettest month, has a maximum daytime temperature of 28°C (82°F). The city receives 290 hours of sunshine in this period. During the driest month February you can expect a temperature of 3°C (37°F). For more detailed insights into the city's temperatures, visit our Indianapolis Temperature page.
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in July
Explore Indianapolis's Historical Precipitation: 1976-2026
Browse day-by-day precipitation records for Indianapolis spanning 51 years. Select any month and year to see actual rainfall and snowfall recorded on each day.
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.
heavy rainfall
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Indianapolis vs World: Rainfall Compared
Indianapolis's average annual precipitation is 1202 mm (47 in). Let's compare this to some popular worldwide tourist destinations:
The climate in San Francisco, USA, is influenced by coastal weather, with 469 mm (18 in) of rainfall mostly during the winter months.
Beijing, China, receives 560 mm (22 in) of annual precipitation, concentrated in the summer months.
Perth, Australia, receives 565 mm (22 in) of rainfall annually, mostly during the winter months.
Bangkok, Thailand, experiences a tropical monsoon climate with 1668 mm (66 in) of annual rainfall, with the heaviest precipitation occurring during September and October.
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.
- "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 Indianapolis (IN)'s weather, including sunshine hours, humidity levels, and temperature data, visit our Indianapolis (IN) Climate page.
