SUMMARY: Meteorologist Eric Zernich reports more hot and humid days ahead for Louisville, with temperatures rising to the mid-90s through the week but staying below record highs. Despite the heat dome building and heat indices reaching 102-104, Louisville remains just under the National Weather Service’s heat advisory threshold requiring a heat index of 105 for several hours. Nearby areas, including southern Indiana and parts of the Great Lakes region, have heat advisories. Nights remain warm and muggy, with lows around 77°F. A few isolated afternoon showers may occur, but overall expect a persistent stretch of hot, humid, mostly sunny weather requiring hydration and cooling precautions.

WLKY meteorologist Eric Zernich’s Saturday night’s Forecast

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SUMMARY: This weekend will be very hot and humid, with temperatures rising from 93°F on Saturday to 97°F by Tuesday. While Louisville won’t have a heat advisory, nearby counties and parts of Indiana will, some even reaching excessive heat warnings with temperatures near 100°F. A strong upper-level high pressure is causing a heat dome over much of the central and eastern U.S., pushing cool air into Canada and trapping the heat here. Humidity will make it feel hotter, so staying hydrated, using sunblock, and wearing light clothing is essential. Events like the Saint Matthews Summer Fest will be warm and muggy, continuing through next week.

WLKY meteorologist Eric Zernich’s Friday evening forecast

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SUMMARY: Friday ended spring in Central and Eastern Kentucky with warm, sunny weather and highs in the mid-80s. A strong high-pressure ridge is bringing a dry, hot weekend, with Saturday reaching near 90°F and increasing humidity. Sunday heats up further, with highs in the low 90s and heat indices near 100°F, marking the hottest weather of 2025 so far. Early next week will see temperatures climbing into the mid-90s with high humidity, pushing heat indices into the triple digits. Mostly sunny skies will dominate, though isolated storms could appear midweek. Nights remain warm and muggy throughout.

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