The 10-day span for Horsham runs from a high near 85° on Thursday down to 61° overnight on Tuesday. Roughly 23.5 in of rain falls over the period, with Saturday the most likely wet day (90%). Expect a blustery spell — gusts near 27 mph on Thursday. The NWS alert board for this area is currently clear. Right now Horsham is about 13° cooler than nearby Baltimore. Longer view: classic Northeast mix — nor'easters, humid spells and a glorious fall.
Horsham, PA · Elev 249 ft · 40.18°N, 75.13°W · Pennsylvania · Forecast computed for these exact coordinates