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Grissom AFB, IN
Full City Profile · Indiana · Miami County County
2.7
/5.0
C+
Fair
2,882
Population
721/sq mi density
$52,829
Median Income
$24,193 per capita
$84,700
Home Value
$185,601 Zillow
$864
Median Rent
22.3% income on rent
50°F
Avg Temperature
275 sunny days/yr
315
Violent Crime/100K
3,207 property/100K
C+
Overall
2.7 / 5.0
Fair overall score based on economy, affordability, safety and education
B+
Economy
3.6 / 5.0
$52,829 median income, 2.7% unemployment
A+
Affordability
5.0 / 5.0
$84,700 home value, $864/mo rent
F
Safety
1.0 / 5.0
315 violent crimes/100K
F
Education
1.4 / 5.0
4.9% bachelor's degree or higher
Grissom AFB experiences four distinct seasons with an average annual temperature of 50°F (10°C). Winters average 24°F in January while summers reach 72°F in July. The area gets 275 sunny days per year. Annual precipitation totals 41.1 inches. The area receives 24.6 inches of snow annually. Air quality is rated Good with a median AQI of 41.
Temperature
24°F Jan (-4°C)
72°F Jul (22°C)
| Annual Average | 50.1°F |
| 7% below US avg | |
| January Average | 24°F (-4°C) |
| July Average | 72°F (22°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 793 ft (242 m) |
| Area | 4.0 sq mi (10.4 km²) |
| Population Density | 721/sq mi |
| Coordinates | 40.6571°N, 86.1454°W |
| Timezone | America/Indiana/Indianapolis |
| County | Miami County County |
| Nearest Airport | Delaware County Regional (MIE) 49 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 41.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 52.8 / 100 |
| Social Vulnerability | 53.4 / 100 |
| Community Resilience | 54.8 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively Low |
| Ice Storm | Very Low |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Tsunami History
1 tsunami recorded within 500 km. Highest wave on record: 3.0 m (10 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1954 | MICHIGAN CITY, IN (LAKE MICHIGAN) | Avalanche | 3.0 m | 7 | 131 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 24°F (-4°C) | 2.1 in | Coldest |
| February | 28°F (-2°C) | 2.0 in | Driest |
| March | 38°F (3°C) | 2.9 in | |
| April | 49°F (10°C) | 4.0 in | |
| May | 61°F (16°C) | 3.9 in | |
| June | 70°F (21°C) | 3.6 in | |
| July | 72°F (22°C) | 4.3 in | Warmest, Wettest |
| August | 71°F (22°C) | 3.6 in | |
| September | 65°F (18°C) | 3.0 in | |
| October | 53°F (12°C) | 2.6 in | |
| November | 41°F (5°C) | 3.0 in | |
| December | 29°F (-1°C) | 3.0 in |
Grissom AFB has a seasonal temperature swing of 48°F / from 24°F in January to 72°F in July. Total annual precipitation is 37.8 inches, with July being the wettest month (4.3") and February the driest (2.0").