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.
Early spring may still experience some cooler days (where a light coat or sweater is needed), but in late April and May the days are much warmer when only short sleeves can be worn. Occasional rain showers may occur at this time. Average temperatures range from 2Â°C to 17Â°C (35 to 62Â°F). Summer starts in June and lasts until August. This is the hottest time of year when temperatures can exceed 30Â°C (86Â°F) with high humidity. Summer is also the rainy season, particularly during the hot and muggy month of July. Average temperatures range from 21Â°C to 30Â°C (70 Â°F to 86Â°F).