Romulus, MI Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Romulus, a city in Wayne County, Michigan.
Overnight
57°F
Chance Rain Showers
A chance of rain showers. Mostly cloudy. Low around 57, with temperatures rising to around 59 overnight. Northeast wind around 6 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Romulus
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 57°F | Chance Rain Showers | 6 mph NE | 21% |
| Saturday | 69°F | Rain Showers | 5 to 9 mph E | 74% |
| Saturday Night | 60°F | Showers And Thunderstorms | 5 to 8 mph E | 94% |
| Sunday | 69°F | Chance Showers And Thunderstorms | 7 to 13 mph NNE | 48% |
| Sunday Night | 53°F | Partly Cloudy | 13 mph NE | 4% |
| Monday | 63°F | Mostly Cloudy | 12 to 15 mph NE | 4% |
| Monday Night | 50°F | Mostly Cloudy | 12 to 15 mph NE | 7% |
| Tuesday | 62°F | Mostly Cloudy | 17 mph NE | 13% |
| Tuesday Night | 52°F | Chance Rain Showers | 16 mph ENE | 46% |
| Wednesday | 62°F | Chance Rain Showers | 14 to 17 mph ENE | 52% |
| Wednesday Night | 52°F | Chance Rain Showers | 9 to 14 mph ENE | 52% |
| Thursday | 65°F | Slight Chance Rain Showers then Partly Sunny | 12 mph NE | 19% |
| Thursday Night | 52°F | Mostly Cloudy | 9 mph NE | 12% |
| Friday | 69°F | Mostly Sunny | 7 to 10 mph NE | 8% |
Forecast source: National Weather Service (api.weather.gov) for Romulus (42.224, -83.366). Updated through the day.
Growing snapshot for Romulus
Last spring frost
Apr 20
First fall frost
Oct 27
Growing season
188 days
Hardiness zone
6b
More local growing data for Romulus: nearby ZIP 48242 weather · frost dates · planting calendar · Michigan frost dates
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Climate data from the nearest NOAA station, Detroit Metro Ap, Mi (1.8 mi from Romulus). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.