Most items are not heat sensitive and can ship anytime.

See Also: 1. Heat Sensitives 2. Heat Maps 3. Ship Transit Times 4. Heat Protection

Items that may need heat protection

Maximum ship temperatures if no Heat Protection.

No 70°F heat sensitive items to  southern states  during June, July, and August except by refrigerated truck.
Southern States: Louisiana, Texas, New Mexico, Arizona, Nevada and Southern California. 

Typically it's above  80°F / 26°C during June, July and August in the US.
Southern States are also typically above 80°F during May and September.

Heat sensitive's that need heat protection  over 80°F  (26°C) :

All Chocolates, M&M's, rainbow mix, and giant mints. 
        (When over 70°F (21°C) No Lindt Truffles)
Confections, yogurt & carob confections, baking drops and coatings, smooth and melty mints, sweet and salty mix,  Neapolitan coconuts, and haystacks. Unwrapped Cases: Lemon drops, horehound, and cinnamon balls.

 Heat sensitive's that need heat protection  over 90°F  (32°C) :

Medjool dates, date rolls, cherry sours, cinnamon imperials, Reese's pieces, Cases of sugar free hard candy , candy corn, jelly beans but NOT Jelly Belly jelly beans, and peach gummy rings. Unwrapped Packaged: Lemon drops, horehound, and cinnamon balls.