As stated in the Noise Guidebook, âSTC is used as a. measure of a material's ability to reduce sound,â and. effectively mitigate any adverse noise levels that. could impede a person's use of a residential or. commercial structure. The higher the STC value, the. greater the sound attenuation and presumably the.
1 Record Coldest year in Pennsylvania - 1917 / Avg temperature 46.08 degrees. 2  Pennsylvania average Summer temperature (June, July, August) 68.6 F degrees, 34th warmest U.S. summer state. Pennsylvania average Summer temperature (June, July, August) 68.6 F degrees, 34th warmest U.S. summer state. 2  Pennsylvania average Winter temperature (December, January, February) 28.4 F degrees, 20th coldest U.S. winter state.
Spring temperature averages range from a high of 69.9 degrees Fahrenheit (21.1 degrees Celsius) in Florida to a low of 24.7 Â°F (-4.1 Â°C) in Alaska. For the entire United States, excluding Hawaii and Alaska, the season averages 52.0 Â°F (11.1 Â°C).