September in Jamestown: afternoons around 59°F, nights around 34°F. Nothing in the forecast averages argues against a doorstep delivery; any basket in the catalog travels well.
Freezing nights (January, February, March, April, May, October, November and December). The average low reaches 12°F in February. Jams, sauces and fresh fruit should not spend a night outside; offices, senior residences and hospitals all receive indoors.
Wettest months (April and May). Around 4.8 and 3.8 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, Boulder 14 W station, 9.5 miles from Jamestown. 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.