Ruby, MI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Ruby, a community in St. Clair County, Michigan.
This Afternoon
72°F
Mostly Sunny
Mostly sunny. High near 72, with temperatures falling to around 70 in the afternoon. South wind around 14 mph, with gusts as high as 25 mph.
7-day forecast for Ruby
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 72°F | Mostly Sunny | 14 mph S | 3% |
| Tonight | 59°F | Mostly Cloudy | 8 to 12 mph S | 3% |
| Wednesday | 68°F | Light Rain Likely | 9 to 15 mph S | 74% |
| Wednesday Night | 51°F | Light Rain | 6 to 15 mph SSW | 96% |
| Thursday | 63°F | Partly Sunny | 6 to 13 mph SW | 9% |
| Thursday Night | 46°F | Mostly Cloudy then Slight Chance Light Rain | 2 to 7 mph W | 19% |
| Friday | 58°F | Chance Light Rain | 2 to 7 mph NNW | 40% |
| Friday Night | 40°F | Chance Light Rain | 7 mph N | 40% |
| Saturday | 53°F | Chance Light Rain | 8 mph NNW | 29% |
| Saturday Night | 34°F | Mostly Cloudy | 6 mph WNW | 13% |
| Sunday | 54°F | Partly Sunny then Slight Chance Light Rain | 5 to 8 mph WSW | 15% |
| Sunday Night | 34°F | Slight Chance Light Rain then Mostly Cloudy | 6 mph WSW | 15% |
| Monday | 54°F | Partly Sunny then Slight Chance Light Rain | 6 to 9 mph WNW | 15% |
| Monday Night | 35°F | Slight Chance Light Rain then Partly Cloudy | 8 mph WSW | 15% |
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 Nov 3, 2026.