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Weather & Climate in Indianapolis, IN
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Indianapolis experiences four distinct seasons with an average annual temperature of 55°F (13°C). Winters average 37°F in January while summers reach 75°F in July. The area gets 275 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 39.4 inches. The area receives 10.4 inches of snow annually. Air quality is rated Good with a median AQI of 41. The city sits at an elevation of 722 feet.
Temperature
37°F Jan (3°C)
75°F Jul (24°C)
| Annual Average | 55.2°F |
| 2% above US avg | |
| January Average | 37°F (3°C) |
| July Average | 75°F (24°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 722 ft (220 m) |
| Area | 368.0 sq mi (953.2 km²) |
| Population Density | 2,443/sq mi |
| Coordinates | 39.7767°N, 86.1459°W |
| Timezone | America/Indiana/Indianapolis |
| County | Marion County County |
| Nearest Airport | Indianapolis International (IND) 9 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 41.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively High |
| Risk Score | 97.5 / 100 |
| Social Vulnerability | 39.7 / 100 |
| Community Resilience | 49.4 / 100 |
Hazard Breakdown
| Tornado | Very High |
| Hurricane | Very Low |
| Earthquake | Relatively Moderate |
| Wildfire | Very Low |
| Flood | Relatively High |
| Hail | Relatively Moderate |
| Strong Wind | Very High |
| Heat Wave | Relatively High |
| Winter Weather | Relatively High |
| Lightning | Very High |
| Ice Storm | Relatively High |
| Drought | Relatively Low |
| Cold Wave | Relatively High |
| Landslide | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
8 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.8.
| Jun 17, 2021 | Illinois-Indiana border region | M3.8 | 98 km | 6 km |
| Sep 12, 2004 | 4 km NW of Manilla, Indiana | M3.8 | 46 km | 2 km |
| Dec 20, 1990 | 5 km S of Stilesville, Indiana | M3.7 | 46 km | 5 km |
| Apr 14, 2000 | 4 km NW of Heritage Lake, Indiana | M3.6 | 52 km | 5 km |
| Dec 17, 1990 | Illinois-Indiana border region | M3.2 | 83 km | 10 km |
| Dec 16, 1996 | 3 km NNE of Terre Haute, Indiana | M3.1 | 112 km | 5 km |
| Apr 17, 1990 | 8 km NW of Fort Recovery, Ohio | M3.0 | 134 km | 5 km |
| Jan 29, 1990 | 11 km S of Paoli, Indiana | M2.6 | 150 km | 0 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Tornado History
601 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 76 fatalities, 1,690 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Jun 11, 1998 | EF4 | 17 km | 13.2 mi | 0 |
| Jul 9, 1980 | EF4 | 60 km | 11.0 mi | 2 |
| Apr 3, 1974 | EF4 | 81 km | 35.6 mi | 4 |
| Apr 3, 1974 | EF4 | 81 km | 18.0 mi | 1 |
| Apr 3, 1974 | EF4 | 43 km | 18.9 mi | 0 |
| May 14, 1972 | EF4 | 6 km | 30.0 mi | 0 |
| Apr 11, 1965 | EF4 | 85 km | 21.8 mi | 0 |
| Apr 11, 1965 | EF4 | 67 km | 45.7 mi | 28 |
| Apr 11, 1965 | EF4 | 72 km | 48.0 mi | 25 |
| Apr 25, 1961 | EF4 | 37 km | 63.1 mi | 0 |
| Mar 14, 2024 | EF3 | 98 km | 41.3 mi | 1 |
| Mar 31, 2023 | EF3 | 91 km | 6.4 mi | 0 |
| Mar 31, 2023 | EF3 | 27 km | 5.5 mi | 0 |
| Mar 31, 2023 | EF3 | 73 km | 5.9 mi | 2 |
| Aug 24, 2016 | EF3 | 76 km | 8.6 mi | 0 |
| Nov 17, 2013 | EF3 | 86 km | 37.9 mi | 0 |
| Jun 5, 2010 | EF3 | 96 km | 7.5 mi | 0 |
| Jun 3, 2008 | EF3 | 53 km | 9.7 mi | 1 |
| Nov 15, 2005 | EF3 | 59 km | 10.0 mi | 0 |
| Sep 20, 2002 | EF3 | 73 km | 112.0 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950-2024, US only).
Wildfire History
5 wildfires (100+ acres) recorded within 100 km. Largest: UNNAMED (1,547 acres, 2021).
| Year | Name | Acres Burned | Distance |
| 2021 | UNNAMED | 1,547 | 73 km |
| 2007 | UNNAMED | 1,102 | 51 km |
| 2016 | UNNAMED | 898 | 73 km |
| 2010 | FORK RIDGE RX | 697 | 87 km |
| 2019 | UNNAMED | 670 | 87 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 37°F (3°C) | 2.3 in | Driest |
| February | 30°F (-1°C) | 2.3 in | Coldest |
| March | 41°F (5°C) | 3.4 in | |
| April | 52°F (11°C) | 3.9 in | |
| May | 62°F (17°C) | 4.3 in | |
| June | 72°F (22°C) | 3.7 in | |
| July | 75°F (24°C) | 4.5 in | Warmest, Wettest |
| August | 74°F (23°C) | 3.7 in | |
| September | 67°F (19°C) | 2.9 in | |
| October | 55°F (13°C) | 2.8 in | |
| November | 43°F (6°C) | 3.5 in | |
| December | 32°F (-0°C) | 3.0 in |
Indianapolis has a seasonal temperature swing of 45°F / from 30°F in February to 75°F in July. Total annual precipitation is 40.4 inches, with July being the wettest month (4.5") and January the driest (2.3").