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.
1 If the concrete mix was stiff without too much water in it, the temperature was over 65Â° F during and after the slab was poured, and there has been little rain; you may be able to stain it in as little as 18 days.  If the temperature was under 65Â° F, the concrete mix was soupy, or thereâs been a lot of rain, I would wait 30-45 days before staining.