I’m keeping a close eye on a developing low-pressure system that will end our warm, dry stretch by Friday night — but first, tonight looks quiet and comfortable. Skies are clear across the region this evening, and temperatures are slowly backing off from today’s highs in the low-to-mid 80s. Overnight lows will dip into the upper 40s to low 50s, with Elmira and Geneva likely touching the cooler end of that range near 47–48°. No frost risk tonight, and no alerts are active.
Friday brings one more warm day before things change. Highs climb to near 88° — the warmest reading of the week — under mostly overcast skies as moisture ahead of an approaching system begins to stream in. Winds pick up slightly out of the west by afternoon, gusting downwind of Lake Erie.
The real story is Friday night into Saturday. A surface low tracking across Ontario will push a cold front through the region Saturday afternoon and evening. Showers and scattered thunderstorms are likely Saturday, with storm chances maximized along lake breeze boundaries inland. With atmospheric moisture running high — think 1.5 to 1.75 inches of precipitable water — any storms that fire Saturday could produce heavy rainfall in short periods. The Ithaca and Canandaigua areas should watch that timing carefully. Sunday looks notably better, with clearing skies and highs returning to the mid-70s.
Weather Center forecast for the Finger Lakes region. Sourced from NWS, Open-Meteo, NWS Area Forecast Discussion, and USGS stream-flow data. Updated 6 AM, noon, and 6 PM ET.