Union Mills, IN Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Union Mills, a community in Laporte County, Indiana.
Today
82°F
Mostly Sunny
Mostly sunny, with a high near 82. South wind around 5 mph.
7-day forecast for Union Mills
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 82°F | Mostly Sunny | 5 mph S | 0% |
| Tonight | 61°F | Partly Cloudy | 5 mph S | 0% |
| Wednesday | 82°F | Partly Sunny then Slight Chance Showers And Thunderstorms | 5 mph SW | 29% |
| Wednesday Night | 64°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 0 to 5 mph S | 86% |
| Thursday | 78°F | Rain Showers | 5 mph SW | 86% |
| Thursday Night | 61°F | Showers And Thunderstorms Likely then Slight Chance Showers And Thunderstorms | 0 to 5 mph SE | 60% |
| Friday | 81°F | Mostly Sunny | 0 to 5 mph SW | 9% |
| Friday Night | 62°F | Partly Cloudy | 0 to 5 mph SW | 9% |
| Saturday | 83°F | Mostly Sunny | 0 to 10 mph SW | 11% |
| Saturday Night | 67°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 5 mph SW | 19% |
| Sunday | 84°F | Slight Chance Showers And Thunderstorms then Mostly Sunny | 5 to 15 mph SW | 19% |
| Sunday Night | 68°F | Chance Showers And Thunderstorms | 10 to 15 mph SW | 38% |
| Monday | 84°F | Chance Rain Showers then Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 38% |
| Monday Night | 68°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 10 mph SW | 46% |
Forecast source: National Weather Service (api.weather.gov) for Union Mills (41.495, -86.784). Updated through the day.
Growing snapshot for Union Mills
Last spring frost
Apr 29
First fall frost
Oct 13
Growing season
166 days
Hardiness zone
5b
More local growing data for Union Mills: nearby ZIP 46382 weather · frost dates · planting calendar · Indiana frost dates
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Climate data from the nearest NOAA station, Wanatah 2 Wnw, In (8.8 mi from Union Mills). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.