By Bennett's Concrete and Excavation, Norwich, NY. Updated October 2026.
The short answer
In the Norwich area, frost-free nights generally arrive in mid-May. NOAA-based frost data for Norwich puts the 50 percent chance of the last 32-degree night at May 13 and the first fall frost at October 4. Between those dates, most concrete work goes smoothly. Before and after them, concrete can still be poured, but it needs protection and more time before it sees freeze-thaw and salt.
Season by season
| When | What to expect |
|---|---|
| March to April | Frost still in the ground, soft and muddy sites, freezing nights. Excavation and base work may wait for the ground to firm up. |
| May to June | Frost risk drops through May. Good curing weather. Busy season starts. |
| July to August | Heat and wind speed up setting. Early starts and fast finishing. |
| September | Often the best concrete weather of the year: mild days, cool nights. |
| October to November | Frost returns. Blankets, warmer mixes and closer watch on forecasts. |
| December to February | Cold-weather concreting rules apply. Mostly interior slabs in enclosed buildings. |
What 'too cold' means
NRMCA defines cold weather as more than three days in a row where the average daily temperature is below 40 degrees F. Concrete placed then must be protected from freezing until it reaches about 500 psi, roughly two days. For concrete that will face freeze-thaw, NRMCA says to protect it until about 3,500 psi. Concrete is never placed on frozen ground or on snow and ice. Our cold weather concrete guide covers what that looks like on site.
Why late fall is risky for driveways and walks
NRMCA's scaling guide warns about exterior concrete placed in late fall, winter or early spring, when it may freeze while still saturated. It also recommends no deicers on concrete in its first winter. A driveway poured in mid-November gets little time to dry and gain strength before the plows and salt trucks start. If you can, schedule salted surfaces like driveways, aprons and sidewalks earlier in the season.
What 'too hot' means
Summer brings its own problems. NRMCA's hot-weather guide lists high air and concrete temperatures, low humidity, wind and direct sun as the conditions that hurt fresh concrete. Wind above about 5 mph raises the risk of early surface cracks. In very hot weather, early morning pours give better control. See hot weather concrete.
Interior slabs have more room
Garage floors, basement floors and pole barn floors poured inside a closed building can often go later into the fall, because the building blocks wind and holds heat. The building still has to be closed in, the ground under the slab can't be frozen and the space may need to be heated. See the pole barn floor guide.
Watching the forecast on pour day
Even in the good months, pour day depends on the forecast. Heavy rain on fresh concrete can wash the surface, so pours get moved. Quikrete's curing directions say not to apply curing compound if rain or temperatures below 50 degrees F are expected within 24 hours. In spring and fall, a cold night after a warm day is the thing to watch. We'd rather move a pour a few days than finish it in the rain or race a frost.
Book early
The good-weather window is short, and every contractor's calendar fills in the spring. If you want a patio by summer or a driveway done well before winter, reach out in late winter or early spring. That also leaves time for any permits and for the site to dry out. Our concrete project timeline walks through the steps.
Sealing has its own season
NRMCA describes late summer, after a few dry days, as an ideal time to apply a breathable sealer. Concrete poured in spring or early summer can be sealed before its first winter. Late-season pours may have to wait. Ask us about concrete sealing when you schedule your pour.
