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When Is the Best Time to Pour Concrete in South Carolina?

Spring and fall are the easiest seasons to pour concrete in the Upstate; summer and winter pours work with extra precautions.

Short answer: Spring and fall are the easiest times to pour concrete in the Upstate: mild temperatures make finishing and curing easier, and HomeGuide notes they often bring better contractor pricing too. Summer pours are fine with heat precautions. In winter, the American Concrete Institute treats any time the air is, or is expected to be, below 40°F during the protection period as cold weather, needing protection.

By Concrete Pros Greenville SC Editorial Team · Last reviewed October 2026 · How we research

In this guide

Concrete can be poured year-round in South Carolina. What changes is how much care the crew needs to take, and what that care costs.

Why temperature matters

Concrete hardens by a chemical reaction with water (hydration), not by drying. Heat speeds that reaction up; cold slows it down. Either extreme can weaken the surface if the crew doesn’t adjust.

Hot weather: Upstate summers

ACI’s hot-weather guidance is about conditions that speed up moisture loss and hydration, not a single temperature. Some engineers start hot-weather procedures above about 85°F. On a hot, humid Upstate afternoon, the risks are:

  • Fast setting, leaving less time to finish.
  • Surface drying before curing starts, which leads to cracking.
  • Water added on site to keep the mix workable, which reduces strength and increases shrinkage and cracking.

What good crews do in summer: pour early in the morning, use cool mix water or ice, use retarding or water-reducing admixtures, dampen the base first, and start curing immediately with fogging, wet burlap or a curing compound.

Cold weather: winter pours

ACI 306 defines cold weather as when the air temperature has fallen to, or is expected to fall below, 40°F during the protection period. The danger is fresh concrete freezing before it gains enough strength:

  • ACI notes concrete reaches its freeze-damage threshold at about 500 psi, and at 50°F most well-proportioned mixes get there within 48 hours.
  • Freezing damage is assumed once the concrete itself drops below 32°F.
  • Protected for two to three days in normal conditions (unloaded slabs), concrete usually comes through fine.

What good crews do in winter: use warm mix water or accelerating admixtures, never pour on frozen ground, and cover the slab with insulated blankets after finishing.

Rain

Light rain after the concrete has set is rarely a problem. Heavy rain during or just after finishing can wash out the surface. Watch the forecast for the first several hours, and keep plastic sheeting on hand.

Planning a spring or fall project? Request a free quote early; those seasons book up.

Curing tips for any season

  • Start curing right after finishing. Concrete Network notes skipped curing can cut surface strength by up to 50% in extreme cases.
  • Keep it moist or sealed with a curing compound, wet blankets or plastic for the first several days.
  • Stay off it: walk after 24–48 hours, drive after at least 7 days, heavy vehicles after about 28–30 days.
  • Seal later: wait 28–30 days before applying a sealer to new concrete.

Asking your contractor

  1. What will you do differently if it’s above 85°F or below 40°F on pour day?
  2. Will you add water to the truck on site? (The answer should be no.)
  3. How will the slab be cured, and for how long?
  4. What’s the rain plan?

See how to compare concrete quotes for the full checklist.

Get a free quote from a local contractor

Tell us about the job once. A licensed contractor who works in your part of the Upstate will call you about a free, no-obligation quote, usually within 24 hours.

Request a free quote or call (864) 432-1750.

Sources

Concrete Pros Greenville SC is a free referral service. Work is performed by independent licensed contractors in our network.