Pennsylvania Weather Forecast: Big Changes Coming

It's the first day of fall, but for the next few days it will feel like the height of summer. Temperatures could reach the 90s this weekend across the Philadelphia region.

According to the National Weather Service, there is no rain in the seven day forecast. Temperatures will largely be in the mid 80s during that time period. On Sunday and Monday, they'll spike up to the 90s.

The Weather Channel says a shift in the upper-level pattern is causing the weather to feel more like July than late September.

"The last week of September will start out with a southward dip in the jet stream, or trough, over the West and a northward bulge of the jet stream, or ridge, over the East. This pattern has brought chilly conditions to the West and warmth to the East," according to the Weather Channel.

Don't get too used to it, though. By late next week, it will begin to feel more like autumn, the Weather Channel predicts.


Today: Mostly sunny, with a high near 85. North wind around 10 mph.

Tonight: Partly cloudy, with a low around 65. North wind around 7 mph.

Saturday: Sunny, with a high near 86. North wind around 9 mph.

Saturday Night: Mostly clear, with a low around 68. North wind 3 to 8 mph.

Sunday: Sunny, with a high near 90. North wind around 7 mph.

Sunday Night: Mostly clear, with a low around 69.

Monday: Mostly sunny, with a high near 91.

Monday Night: Partly cloudy, with a low around 70.

Tuesday: Partly sunny, with a high near 86.

AccuWeather photo