Can You Pour Concrete in 110°F Arizona Summers?
Yes — here's how Phoenix concrete crews pour through summer without compromising slab strength: retarders, ice-chilled water, early starts, cure protection.
Short answer
Yes. Pouring concrete at 110°F+ is routine in Phoenix when the crew uses the right mix design, schedule, and cure protocol. Skipping any of those is what produces the cracked, crazed, dusty slabs you see on cheap summer pours.
The four levers we pull
1. Mix design — a retarder slows hydration. Type II cement and fly-ash blends generate less heat. 2. Ice-chilled mix water — drops fresh-concrete temperature 10–15°F at the truck. 3. Early-morning starts — pours start 4:30–6:00 AM in June through September. 4. Cure protection — curing compound sprayed within 30 minutes, or wet-burlap cure for high-spec slabs.
What we don't do
- Pour into an afternoon thunderstorm forecast.
- Skip vapor barrier on summer slabs (the slab will pull moisture from below and curl).
- Pour without sun shade on small high-finish jobs.
FAQ
Will a summer-poured slab be weaker?
No, when poured with proper mix and cure protocol. The slab can actually gain comparable 28-day strength to a winter pour.
How long does curing take in summer?
Same 28-day strength curve — but the first 7 days of moisture protection are critical.
