AWUS81 KCTP 210843 RWSCTP PAZ004>006-010>012-017>019-024>028-033>037-041-042-045-046- 049>053-056>059-063>066-212245- Regional Weather Summary National Weather Service State College PA 443 AM EDT Sun Jun 21 2026 Locally dense fog formed in the valleys of Central and Northern PA overnight as a result of moist ground from Saturday's showers, light wind and cool temperatures. The fog will dissipate by 9 AM today. A weak area of high pressure at the surface and aloft will will provide the Keystone state with a mainly dry Sunday. A few isolated showers are possible across the Northern Mountains of the state during the mid to late afternoon hours. High temperatures today will be in the low to mid 70s across the Northern and Western Mountains and in the upper 70s to low 80s in the Central and Southern Valleys. The Greater Philadelphia Area will see the mercury reach the mid 80s. Expect thickening cloud cover to spread in from the west for tonight and Monday with periods of rain statewide. A few thunderstorms with heavy rain and gusty winds will be possible, mainly across the southern part of the state. Lows tonight will vary from the low to mid 50s across the Northern Mountains to the low and mid 60s in the southern valleys. Highs on Monday will be somewhat chilly for late June across the Northern half of the state, ranging from 65 to 70 degrees. In the southern valleys, temperatures will top out in the mid 70s to mid 80s. Much of the Keystone state will get upwards of an inch of rain by late Monday. $$