National Weather Service Forecast for: Lancaster, OH Issued by: National Weather Service Wilmington, OH

Updated: 4:00 pm EDT Sep 21, 2026

This Afternoon Chance Rain Showers Tuesday Cloudy then Slight Chance Rain Showers Wednesday Showers And T-Storms Likely Thursday Partly Sunny Friday Mostly Sunny Saturday Sunny Sunday Mostly Sunny   Hi 65 °F Hi 68 °F Hi 65 °F Hi 66 °F Hi 67 °F Hi 68 °F Hi 69 °F     Tonight Chance Rain Showers then Cloudy Tuesday Night Showers And T-Storms Likely Wednesday Night Showers And T-Storms Likely Thursday Night Partly Cloudy Friday Night Mostly Clear Saturday Night Partly Cloudy Sunday Night Partly Cloudy   Lo 56 °F Lo 57 °F Lo 54 °F Lo 48 °F Lo 45 °F Lo 47 °F Lo 50 °F

Forecast from NOAA-NWS for Lancaster, OH.

904
FXUS61 KILN 211641
AFDILN

Area Forecast Discussion
National Weather Service Wilmington OH
1241 PM EDT Mon Sep 21 2026

.WHAT HAS CHANGED...
Flood watch expired.

&&

.KEY MESSAGES...

1) Cooler weather will prevail through the week. More showers will
occur Tuesday night into Wednesday.

&&

.DISCUSSION...
KEY MESSAGE 1)

Another MCV moving thru northern counties of the FA will continue to
produce some showers - mainly across the north and east. Heavy rain
and new flood threat has ended. Therefore, the flood watch has been
allowed to expire.

Cooler airmass will continue to settle across the area today on a low
level northeasterly flow. Have adjusted sky conditions to account for
more clouds and went cooler than NBM - especially across the northern
counties.

Mid level short wave will drop southeast from the Upper MS Valley
and deepen and close off over the Ohio Valley on Wednesday. This
will work to amplify an inverted surface trough along the western
slopes of the Appalachians. These features will bring some showers to
the area Tuesday night into Wednesday with the greater threat for
rain over the eastern counties.

The closed low will track off to the east coast thru the end of the
week resulting in an extended dry period for the area during the
latter part of the week into the weekend. Highs look to moderate
closer to normal early next week.

&&

.AVIATION /16Z MONDAY THROUGH FRIDAY/...
MVFR ceilings will lower to IFR area wide. Some lingering showers
will come to an end this afternoon and ceilings may briefly lift
back to MVFR. Ceilings are expected to back to IFR to LIFR after
00Z. IFR ceilings slowly improve to MVFR late in the TAF period.

OUTLOOK...MVFR to IFR ceilings Tuesday night and may continue into
Thursday morning. Visibility restrictions are also possible Tuesday
night and Wednesday.

&&

.ILN WATCHES/WARNINGS/ADVISORIES...
OH...None.
KY...None.
IN...None.

&&

$$

DISCUSSION...AR
AVIATION...AR

NWS ILN Office Area Forecast Discussion