Forecast for Tuesday June 9, 2026

TODAY: Mostly cloudy. Highs in the lower 80s. South winds 5 to 10 mph. The sun called out and the clouds are covering its shift with zero enthusiasm. Still warm enough to remind you it’s June, but the breeze hasn’t gone full traitor yet. It’s the last day your shirt won’t try to become a second skin by lunch. Run your errands now.

TONIGHT: Mostly cloudy. A slight chance of showers after midnight. Lows in the lower 60s. South winds 5 to 10 mph. Chance of rain 20 percent. Clouds are hanging around like they’re waiting for the warm front’s Uber to show up. 20% shower chance is the weather’s way of saying “probably not, but don’t sue me.” Windows open is still defensible.

WEDNESDAY: Showers likely in the morning, then a chance of showers and thunderstorms in the afternoon. Humid with highs in the mid 80s. South winds 5 to 10 mph. Chance of rain 70 percent. And here’s where the atmosphere quits pretending. Humidity moves in, unpacks its emotional baggage, and sets the thermostat to “swamp.” Morning rain, afternoon storms, and that Marginal Risk means one of them might get mouthy. Your hair’s filing a grievance with HR.

WEDNESDAY NIGHT: Mostly cloudy in the evening, then becoming partly cloudy. A chance of thunderstorms in the evening. A chance of showers. Humid with lows in the upper 60s. Southwest winds 5 to 10 mph. Chance of rain 50 percent. It’s the kind of night where the air has texture. Upper 60s for a low means your AC just got promoted to essential personnel. If you’re not running it, you’re braver than me.

THURSDAY: Partly sunny. A chance of showers and thunderstorms in the afternoon. Hot with highs in the lower 90s. West winds 5 to 10 mph. Chance of rain 50 percent. Summer stops knocking and kicks the door in. Lower 90s with a heat index sniffing triple digits. 50% storm chance is just the atmosphere adding insult to injury — hot AND wet. Hydrate like you’re getting paid for it, because your body’s about to send you the bill.

Bottom Line for Lebanon County: Tuesday is your grace period — cloudy, lower 80s, and the last day before the air turns into a wet blanket. Wednesday the warm front moves through: showers likely, afternoon storms, mid 80s, and the humidity shows up with luggage. Marginal severe risk Wed-Thu, so damaging winds are possible if storms get organized. Wednesday night only drops to the upper 60s. Thursday we hit the lower 90s with a heat index near 100. Early-season heat punches harder because nobody’s acclimated yet. Prep today. Sweat tomorrow.

This forecast sponsored by:

Shay’s Vending Service: Serving Lebanon County for decades with vending, amusement, and entertainment solutions. Family-owned and locally operated out of Lebanon, PA, Shay’s is known for dependable service, quality equipment, and a commitment to the communities they serve. When it’s 90° outside and your patience is 0°, their machines still take exact change and their dart boards don’t judge your humidity hair.

Blue Bird Inn - Cornwall, PA: A Lebanon Valley landmark since 1859 in Cornwall, PA. Historic charm meets modern American dining with a full-service bar and that popular outdoor patio. Quality food, welcoming atmosphere, and a long tradition of hospitality for locals and visitors alike. If the heat index hits 100 and your grill taps out, their AC and prime rib are undefeated.