September in Romulus: afternoons around 74°F, nights around 56°F. Nothing in the forecast averages argues against a doorstep delivery; any basket in the catalog travels well.
Freezing nights (January, February, March and December). The average low reaches 19°F in January. Jams, sauces and fresh fruit should not spend a night outside; offices, senior residences and hospitals all receive indoors.
Snow (January, February, March and December). About 45 inches a year on average. Allow one extra business day when the date matters: a birthday box that ships two days out still lands on time if it leaves three days out.
Wettest months (May and July). Around 3.7 and 3.5 inches of rain on average. Boxes are sealed, not waterproof: a covered porch or a workplace address keeps the packaging presentable.
Weather only matters for the shipped box. The same-day flowers on this page are carried in by a local florist and handed over, whatever the month.
Normals: NOAA National Centers for Environmental Information, 1991 to 2020, Detroit Metro Ap station, 2.0 miles from Romulus. Heat: average high 85°F or more. Freezing: average low 32°F or less. Snow: 2 inches or more in the month. Wettest: the two months with the most rain.