Weather
Central Pennsylvania Weather Alert: Morning Frost Oct 27-28
State College, PA – Another round of chilly mornings could bring frost back to the State College area Tuesday night and Wednesday morning, Oct. 27 28, as temperatures fall into the middle 30s before a
By Erin Vale · 2026-10-25T10:00:21.176Z
State College, PA – Another round of chilly mornings could bring frost back to the State College area Tuesday night and Wednesday morning, Oct. 27 28, as temperatures fall into the middle 30s before a noticeable warmup arrives later in the week. The National Weather Service expects lows near 34 degrees Tuesday night, followed by areas of frost before 9 a.m. Wednesday. Residents with sensitive outdoor plants may need to take precautions even as afternoon temperatures remain relatively comfortable across central Pennsylvania.
According to the National Weather Service in State College, patchy frost is expected after 2 a.m. Wednesday, with temperatures dropping to approximately 34 degrees. Areas of frost could remain through the early morning before partly sunny skies help temperatures recover to around 61 degrees Wednesday afternoon. The forecast follows another chilly period Sunday night, when lows are also expected to reach 34 degrees and patchy frost could develop after 4 a.m. Monday.
Frost Returns Before Wednesday Morning Warmup The combination of cold overnight temperatures and relatively calm conditions could allow frost to form on exposed surfaces, particularly in sheltered valleys and locations where colder air collects. Although the forecast low remains slightly above the freezing mark of 32 degrees, frost can develop when surfaces cool below the surrounding air temperature. The National Weather Service specifically identifies frost potential for State College, making early Wednesday a period worth monitoring.
Tuesday begins with sunny skies and an afternoon high near 63 degrees, offering relatively pleasant conditions before temperatures fall sharply after sunset. By early Wednesday, readings could approach 34 degrees, representing a 29 degree difference between Tuesday's afternoon high and the following morning's low. This is a day to night temperature change rather than a sudden temperature collapse.
The coldest conditions could affect gardens, outdoor flowers and other frost sensitive vegetation around State College and surrounding Centre County communities. Residents with plants that remain outdoors may want to cover them before Tuesday night or move containers into protected locations. The forecast does not establish a widespread hard freeze, and temperatures are expected to recover after sunrise.
Cold Mornings Give Way to Warmer Afternoons Despite the frost potential, central Pennsylvania is not facing an extended period of freezing daytime temperatures. Monday is expected to reach 68 degrees under sunny skies, followed by a cooler Tuesday afternoon near 63 degrees. Wednesday's high of approximately 61 degrees will continue the relatively cool pattern before temperatures rise again Thursday.
Travelers using Interstate 99, U.S. Route 322 and other roads around State College should be prepared for chilly conditions during early morning departures. The supplied forecast does not indicate freezing precipitation, snow or widespread icy roads. Frost may be visible on parked vehicles and exposed surfaces, but hazardous roadway conditions have not been established.
The contrast between cold mornings and mild afternoons also means residents may need warmer clothing during early commutes while finding lighter layers more comfortable later in the day. Those attending outdoor activities around Penn State University should expect the greatest temperature differences between morning and afternoon hours.
Temperatures Climb Toward 70 Degrees Thursday A more noticeable warming trend arrives Thursday, Oct. 29, when mostly sunny skies and a high near 70 degrees are expected. That would represent a nine degree increase from Wednesday's projected high, providing a considerably milder afternoon following several chilly mornings.
Friday continues the warmer pattern with sunshine and a high near 71 degrees. Saturday, Halloween, is also expected to remain relatively mild, with partly sunny skies and temperatures reaching approximately 70 degrees. The available forecast does not indicate rain or snow through Saturday, although specific Halloween evening conditions remain unavailable.
For now, the most immediate weather concern is frost returning early Wednesday before temperatures rebound later in the week. Residents should continue checking updated National Weather Service forecasts for any changes in overnight lows or frost coverage.
Are you protecting outdoor plants from the returning frost, or looking forward to the warmer weather arriving Thursday?
Five Day Weather Outlook Tuesday 10/27: Sunny skies are expected across State College, with afternoon temperatures reaching approximately 63 degrees and calm winds; Tuesday night turns partly cloudy, with a low near 34 degrees and patchy frost developing after 2 a.m.
Wednesday 10/28: Areas of frost are expected before 9 a.m., followed by partly sunny skies and a high near 61 degrees; Wednesday night becomes mostly cloudy, with temperatures falling to approximately 40 degrees.
Thursday 10/29: Mostly sunny skies bring a noticeable warming trend, with afternoon temperatures climbing to approximately 70 degrees; Thursday night remains mostly clear, with a low near 44 degrees and no precipitation indicated.
Friday 10/30: Sunny conditions continue across the State College area, with temperatures reaching approximately 71 degrees during the afternoon; Friday night becomes partly cloudy, with temperatures falling to around 44 degrees.
Saturday 10/31: Halloween is expected to bring partly sunny skies and a high near 70 degrees, providing relatively mild daytime conditions for outdoor activities; the supplied forecast does not specify Saturday night's low or evening temperatures.
Extended Weather Outlook The supplied National Weather Service point forecast extends through Saturday, Oct. 31, and does not include verified local temperature or precipitation projections for the following six to 10 day period.
The NOAA Weather Prediction Center's national discussion valid Oct. 25 27 describes a frontal system moving eastward from the Upper Great Lakes and central United States toward the Northeast Coast by Tuesday. However, the supplied State College forecast does not indicate significant precipitation or severe weather associated with that broader pattern.