September in Arecibo: afternoons around 86°F, nights around 67°F. Chocolate and cheese are the two to route to an address where someone can bring the box straight in; cookie, nut, coffee and spa baskets shrug off an afternoon on the step.
Heat (June, July, August, September and October). Afternoons average 85°F or more, peaking near 87°F in June. Send chocolate, cheese and fresh fruit to a workplace or a front desk in these months; baked goods, nuts, coffee, tea and spa baskets can take a doorstep drop.
Wettest months (May and September). Around 10.4 and 9.9 inches of rain on average. Boxes are sealed, not waterproof: a covered porch or a workplace address keeps the packaging presentable.
Normals: NOAA National Centers for Environmental Information, 1991 to 2020, Arecibo Obsy station, 5.4 miles from Arecibo. 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.