Ruby, MI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Ruby, a community in St. Clair County, Michigan.
Today
84°F
Sunny
Sunny, with a high near 84. South southwest wind around 9 mph.
7-day forecast for Ruby
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Sunny | 9 mph SSW | 0% |
| Tonight | 59°F | Mostly Clear | 5 to 9 mph S | 0% |
| Wednesday | 87°F | Sunny | 5 to 9 mph SSW | 0% |
| Wednesday Night | 64°F | Partly Cloudy then Chance Showers And Thunderstorms | 2 to 8 mph SW | 33% |
| Thursday | 82°F | Showers And Thunderstorms | 2 to 7 mph WSW | 76% |
| Thursday Night | 62°F | Showers And Thunderstorms then Chance Showers And Thunderstorms | 1 to 5 mph NNW | 76% |
| Friday | 84°F | Chance Showers And Thunderstorms | 1 to 5 mph SW | 47% |
| Friday Night | 63°F | Chance Showers And Thunderstorms then Partly Cloudy | 3 mph S | 45% |
| Saturday | 88°F | Sunny | 2 to 8 mph SW | 12% |
| Saturday Night | 66°F | Chance Showers And Thunderstorms | 3 to 7 mph SSW | 31% |
| Sunday | 89°F | Chance Rain Showers | 3 to 10 mph SW | 31% |
| Sunday Night | 66°F | Chance Showers And Thunderstorms | 6 to 9 mph WSW | 44% |
| Monday | 85°F | Chance Rain Showers | 8 mph W | 44% |
| Monday Night | 64°F | Chance Showers And Thunderstorms | 3 to 7 mph WSW | 46% |
Forecast source: National Weather Service (api.weather.gov) for Ruby (43.033, -82.612). Updated through the day.
Growing snapshot for Ruby
Last spring frost
Apr 19
First fall frost
Nov 3
Growing season
196 days
Hardiness zone
6a
More local growing data for Ruby: nearby ZIP 48049 weather · frost dates · planting calendar · Michigan frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Port Huron, Mi (8.9 mi from Ruby). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.