Marengo, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Marengo, a town in Crawford County, Indiana.
This Afternoon
92°F
Slight Chance Showers And Thunderstorms
A slight chance of showers and thunderstorms. Sunny, with a high near 92. Northwest wind around 3 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Marengo
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 92°F | Slight Chance Showers And Thunderstorms | 3 mph NW | 21% |
| Tonight | 67°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 3 mph E | 18% |
| Saturday | 91°F | Sunny then Slight Chance Showers And Thunderstorms | 3 mph S | 23% |
| Saturday Night | 70°F | Partly Cloudy | 3 mph S | 9% |
| Sunday | 91°F | Mostly Sunny | 5 mph SW | 9% |
| Sunday Night | 66°F | Mostly Cloudy then Slight Chance Rain Showers | 5 mph N | 24% |
| Monday | 83°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 5 mph NE | 47% |
| Monday Night | 60°F | Chance Showers And Thunderstorms | 8 mph NE | 47% |
| Tuesday | 74°F | Chance Showers And Thunderstorms | 6 mph NE | 39% |
| Tuesday Night | 57°F | Chance Showers And Thunderstorms then Mostly Cloudy | 3 to 7 mph NE | 39% |
| Wednesday | 72°F | Partly Sunny | 5 mph N | 11% |
| Wednesday Night | 55°F | Partly Cloudy | 5 mph N | 8% |
| Thursday | 72°F | Mostly Sunny | 5 mph N | 6% |
| Thursday Night | 55°F | Partly Cloudy | 5 mph N | 6% |
Forecast source: National Weather Service (api.weather.gov) for Marengo (38.371, -86.343). Updated through the day.
Growing snapshot for Marengo
Last spring frost
Apr 17
First fall frost
Oct 19
Growing season
184 days
Hardiness zone
6b
More local growing data for Marengo: nearby ZIP 47140 weather · frost dates · planting calendar · Indiana frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, English, In (9 mi from Marengo). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.