Grissom AFB, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Grissom AFB, a community in Miami County, Indiana.
Today
82°F
Sunny
Sunny, with a high near 82. South wind around 0 mph.
7-day forecast for Grissom AFB
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 82°F | Sunny | 0 mph | 0% |
| Tonight | 59°F | Mostly Clear | 0 mph | 0% |
| Wednesday | 83°F | Sunny | 0 to 5 mph SW | 0% |
| Wednesday Night | 65°F | Partly Cloudy then Chance Showers And Thunderstorms | 0 to 5 mph SW | 38% |
| Thursday | 81°F | Showers And Thunderstorms Likely | 5 to 10 mph SW | 69% |
| Thursday Night | 64°F | Showers And Thunderstorms Likely | 0 to 5 mph SW | 69% |
| Friday | 82°F | Partly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph SW | 29% |
| Friday Night | 64°F | Chance Showers And Thunderstorms | 0 to 5 mph SW | 29% |
| Saturday | 83°F | Mostly Sunny | 5 to 10 mph SW | 14% |
| Saturday Night | 67°F | Mostly Clear | 5 to 10 mph SW | 14% |
| Sunday | 85°F | Mostly Sunny | 5 to 15 mph SW | 10% |
| Sunday Night | 69°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph SW | 20% |
| Monday | 85°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph SW | 22% |
| Monday Night | 68°F | Chance Showers And Thunderstorms | 10 mph SW | 41% |
Forecast source: National Weather Service (api.weather.gov) for Grissom AFB (40.657, -86.145). Updated through the day.
Growing snapshot for Grissom AFB
Last spring frost
Apr 25
First fall frost
Oct 17
Growing season
174 days
Hardiness zone
6a
More local growing data for Grissom AFB: nearby ZIP 46971 weather · frost dates · planting calendar · Indiana frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Young America, In (11.7 mi from Grissom AFB). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.