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Monthly Precipitation Table (20 years)
Indianapolis International Airport Daily and Monthly Weather Summaries (CF6)
| Month | Average High |
Average Low |
Average Precip |
Average Snowfall |
| January | 36.1 | 20.9 | 3.12 | 8.8 |
| February | 40.8 | 24.2 | 2.43 | 6.0 |
| March | 51.9 | 33.0 | 3.69 | 3.2 |
| April | 63.9 | 43.3 | 4.34 | 0.2 |
| May | 73.4 | 53.7 | 4.75 | 0.0 |
| June | 82.0 | 62.9 | 4.95 | 0.0 |
| July | 85.2 | 66.4 | 4.42 | 0.0 |
| August | 84.3 | 65.0 | 3.20 | 0.0 |
| September | 78.2 | 57.4 | 3.14 | 0.0 |
| October | 65.6 | 45.5 | 3.22 | 0.1 |
| November | 51.8 | 34.9 | 3.45 | 0.8 |
| December | 40.4 | 26.2 | 2.92 | 6.4 |
| Annual | 62.9 | 44.6 | 43.63 | 25.5 |
NOTE: These records are now found at the new Records page.
Highest Temperature ever recorded: 106 on July 14, 1936 (last of several dates)
Lowest Temperature ever recorded: -27 on January 19, 1994
Greatest temperature change during a calendar day: 58 degrees on January 12, 1916
The high was 68 degrees while the low was 10 degrees.
Average First Freeze Date: October 26
Average Last Freeze Date: April 17
Earliest First Freeze Date on Record: September 30, 1899 and 1993
Latest Last Freeze Date on Record: May 27, 1961
Precipitation (in inches)
Maximum in 24 hours: 7.20 on September 1, 2003
Maximum in 1 Month: 13.14 in July 2015
Minimum in 1 Month: 0.07 in March 1910
Maximum in 1 Year: 57.50 in 1876
Minimum in 1 Year: 24.97 in 1934
Most consecutive days with measurable precipitation: 13; from April 9-21, 1893
Most consecutive days without measurable precipitation: 39; from August 14-September 22, 1908
Snowfall (in inches)
Maximum in 24 hours: 12.5 on February 24-25, 1965
Maximum in a single storm: 16.1 on February 16-17, 1910
Maximum in 1 month: 30.6 in January 1978
Maximum in 1 season: 58.2 on 1981-82
Maximum Depth Measured: 20 on January 26-28, 1978
Normal Date of First Measurable Snowfall: November 24
Normal Date of Last Measurable Snowfall: March 16
Earliest Date of First Measurable Snowfall: October 18, 1989
Latest Date of Last Measurable Snowfall: May 9, 1923
Since 1948...
Day of the Year which has Received the Most Snow: February 25 with 40.8 inches
Maximum Snowfall in a Calendar Day: March 19, 1906 with 12.1 inches
Day of the Year with the Greatest Average Snow Depth: January 31 with 1.7 inches on the ground
Day(s) of the Year with the Most Number of Snow Days of a Trace or Greater: January 9, 15 and 30 with 29 Days
Wind (miles-per-hour)
Average direction and speed: 9.6 from the Southwest
Highest wind gust (1984-present): 85 on April 14, 2006
Pressure (inches of Mercury, reduced to sea level)
Highest: 30.96 on February 12, 1981
Lowest: 28.78 on February 28, 1902
| January | February | March | April |
| May | June | July | August |
| September | October | November | December |
| Winter (2024-25) | Spring | Summer | Fall |
| Annual |
| January | February | March | April |
| May | June | July | August |
| September | October | November | December |
| Winter (2023-24) | Spring | Summer | Fall |
| Annual |
Indianapolis Observed Monthly Precipitation Table
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