Mount Ayr, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mount Ayr, a town in Newton County, Indiana.
Today
83°F
Patchy Fog then Mostly Sunny
Patchy fog before 8am. Mostly sunny, with a high near 83. South wind 0 to 5 mph.
7-day forecast for Mount Ayr
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 83°F | Patchy Fog then Mostly Sunny | 0 to 5 mph S | 0% |
| Tonight | 61°F | Partly Cloudy | 0 mph | 0% |
| Wednesday | 82°F | Partly Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph SSW | 18% |
| Wednesday Night | 65°F | Slight Chance Showers And Thunderstorms then Showers And Thunderstorms | 0 to 5 mph SSW | 78% |
| Thursday | 79°F | Showers And Thunderstorms | 0 to 5 mph SSW | 78% |
| Thursday Night | 62°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 0 mph | 59% |
| Friday | 81°F | Partly Sunny | 0 mph | 13% |
| Friday Night | 63°F | Slight Chance Showers And Thunderstorms | 0 mph | 16% |
| Saturday | 83°F | Mostly Sunny | 0 to 5 mph SSW | 11% |
| Saturday Night | 67°F | Partly Cloudy | 0 to 5 mph SSW | 10% |
| Sunday | 85°F | Mostly Sunny | 5 to 10 mph SW | 11% |
| Sunday Night | 69°F | Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 25% |
| Monday | 85°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 25% |
| Monday Night | 68°F | Chance Showers And Thunderstorms | 5 to 10 mph SW | 39% |
Forecast source: National Weather Service (api.weather.gov) for Mount Ayr (40.952, -87.299). Updated through the day.
Growing snapshot for Mount Ayr
Last spring frost
Apr 23
First fall frost
Oct 18
Growing season
177 days
Hardiness zone
6a
More local growing data for Mount Ayr: nearby ZIP 47964 weather · frost dates · planting calendar · Indiana frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Rensselaer, In (6.8 mi from Mount Ayr). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.