Ruby, MI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Ruby, a community in St. Clair County, Michigan.
Tonight
54°F
Mostly Cloudy
Mostly cloudy. Low around 54, with temperatures rising to around 56 overnight. Northeast wind 3 to 9 mph, with gusts as high as 20 mph.
7-day forecast for Ruby
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 54°F | Mostly Cloudy | 3 to 9 mph NE | 13% |
| Saturday | 66°F | Slight Chance Light Rain then Chance Showers And Thunderstorms | 3 to 7 mph ESE | 64% |
| Saturday Night | 55°F | Slight Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 3 to 7 mph E | 73% |
| Sunday | 65°F | Chance Rain Showers | 5 to 13 mph NNE | 37% |
| Sunday Night | 52°F | Slight Chance Rain Showers then Mostly Cloudy | 8 to 13 mph NE | 17% |
| Monday | 63°F | Mostly Cloudy | 12 mph NE | 3% |
| Monday Night | 49°F | Mostly Cloudy | 10 mph ENE | 7% |
| Tuesday | 62°F | Partly Sunny then Slight Chance Rain Showers | 13 mph ENE | 18% |
| Tuesday Night | 50°F | Chance Rain Showers | 9 to 13 mph ENE | 44% |
| Wednesday | 62°F | Chance Rain Showers | 10 mph ENE | 50% |
| Wednesday Night | 51°F | Chance Showers And Thunderstorms | 5 to 9 mph ENE | 50% |
| Thursday | 65°F | Slight Chance Showers And Thunderstorms | 8 mph NE | 20% |
| Thursday Night | 51°F | Slight Chance Rain Showers then Mostly Cloudy | 3 to 7 mph NE | 15% |
| Friday | 67°F | Partly Sunny | 3 to 8 mph NNE | 9% |
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 Sep 19, 2026.