Grissom AFB, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Grissom AFB, a community in Miami County, Indiana.
This Afternoon
69°F
Mostly Cloudy
Mostly cloudy. High near 69, with temperatures falling to around 61 in the afternoon. Southwest wind around 15 mph, with gusts as high as 25 mph.
7-day forecast for Grissom AFB
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 69°F | Mostly Cloudy | 15 mph SW | 7% |
| Tonight | 48°F | Mostly Cloudy | 10 to 15 mph SW | 6% |
| Thursday | 60°F | Mostly Cloudy | 10 to 15 mph SW | 8% |
| Thursday Night | 43°F | Chance Rain Showers | 5 to 10 mph W | 46% |
| Friday | 53°F | Chance Rain Showers | 10 to 15 mph NW | 39% |
| Friday Night | 35°F | Chance Rain Showers then Mostly Cloudy | 5 to 10 mph NW | 39% |
| Saturday | 53°F | Mostly Sunny | 5 to 10 mph NW | 1% |
| Saturday Night | 30°F | Mostly Clear | 0 to 5 mph NW | 0% |
| Sunday | 57°F | Sunny | 5 to 10 mph W | 0% |
| Sunday Night | 33°F | Mostly Clear | 5 to 10 mph W | 0% |
| Monday | 61°F | Sunny | 5 to 10 mph W | 0% |
| Monday Night | 38°F | Clear | 5 to 10 mph SW | 0% |
| Tuesday | 63°F | Sunny | 5 to 10 mph W | 0% |
| Tuesday Night | 37°F | Mostly Clear | 0 to 5 mph NW | 2% |
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 Nov 4, 2026.