Weather for Lihue, HI. Overcast 69.6Â° Feels like 69.6Â° High: 79Â° Low: 72Â° Current conditions as of 04/21/17 5:40 AM HST. Humidity: 91% Visibility: 10.0 mi Dewpoint: 67Â° Barometer: 30.06 in Wind: SW Sunrise: 6:12 AM Sunset: 06:59 PM.
The American Concrete Institute recommends a maintained temperature of 70 degrees F for three days or 50 degrees F for five days to gain sufficient strength for a cold pour to perform up to specification.
It needs to attain a minimum compressive strength of 500 pounds per square inch to avoid freeze damage. Under normal temperatures, concrete can achieve this minimum strength in as little as 24 hours. In cold weather, one needs to fool the concrete into thinking it's warm outside. For concrete to be successfully poured in cold weather, several precautions need to be taken. Never pour concrete on frozen ground, snow or ice.