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Cold temps set in early this week,
but transient ups & downs continue
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Southeast PA Forecast

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Our southeast PA forecast region includes Philadelphia, Doylestown, West Chester, Lancaster, York, Gettysburg & surrounding areas. Forecasts are updated daily M-F and Saturday that covers both weekend days – not Sunday. 

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Much colder through midweek, then moderating late week…then another weekend storm…

The week starts out mostly sunny and cold, with highs only getting to the freezing mark on Monday. Under clear skies Monday night, lows will drop into the mid to upper teens.

The next several days through midweek are cold and mostly sunny as a trough and high pressure remains over the region. Partly cloudy skies follow on Thursday with highs moderating to the middle 40s, and upper 40s on Friday also under partly cloudy skies to start, but then clouds will increase late. Another storm system, this time what looks to be a cutoff upper level low and associated surface low, will bring the possibility of a rain Friday night and Saturday, but this is a highly uncertain forecast as is usually the case with cut-off lows. Good signal for a storm, but not much confidence in possible precipitation types at this point. Probability favors rain as the predominant p-type for this region for now, and we will monitor throughout the week and adjust as needed.

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Forecaster:  Martrich 20 January 0300z

Daily climatology for Philadelphia, PA

Average highAverage lowRecord high temp (year)Record low temp (year)
40°F25°F65°F (1951)-3°F (1984)
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