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

Updated: 4:00 pm EDT Sep 23, 2026

This Afternoon Chance Showers And T-Storms Thursday Mostly Sunny Friday Sunny Saturday Sunny Sunday Sunny Monday Sunny Tuesday Sunny   Hi 65 °F Hi 68 °F Hi 68 °F Hi 72 °F Hi 71 °F Hi 72 °F Hi 74 °F     Tonight Showers And T-Storms Likely then Mostly Cloudy Thursday Night Clear Friday Night Mostly Clear Saturday Night Mostly Clear Sunday Night Mostly Clear Monday Night Partly Cloudy Tuesday Night Partly Cloudy then Slight Chance Rain Showers   Lo 54 °F Lo 45 °F Lo 46 °F Lo 48 °F Lo 49 °F Lo 49 °F Lo 57 °F

Forecast from NOAA-NWS for Lancaster, OH.

770
FXUS61 KILN 231751
AFDILN

Area Forecast Discussion
National Weather Service Wilmington OH
151 PM EDT Wed Sep 23 2026

.WHAT HAS CHANGED...
No significant changes.

&&

.KEY MESSAGES...
1) Cooler weather will prevail through the week. Scattered showers
and drizzle will occur into this evening, along with a few isolated
strikes of lightning in the Scioto River Valley. Skies will clear
tomorrow, with a dry forecast found through at least the weekend.

&&

.DISCUSSION...
KEY MESSAGE 1)
Short wave will become a closed low as it moves southeast across the
region today into tonight. Inverted surface trough will pivot
westward through the area today. This combination will bring isolated
showers across the region that are interspersed through an overcast
low cloud deck. A bit thunder is not out of the question. Greater
coverage and rainfall amounts will occur across eastern counties.
A few convective allowing models continue to generate a few
bullseyes of heavier rain. Parameters do not look as favorable for
heavy rain as earlier in the week. Precipitable water will be 1.2-1.3
inches and the warm cloud depth is unimpressive. Cannot discount
locally heavy rain, but if that occurs, would expect it to be
isolated.

System that moves across the area today will develop into a large cut
off along the Atlantic coast which will create a block through the
weekend. Being on the backside of the system, it will be dry and once
low clouds clear out on Thursday, mainly clear -- just some high
clouds Friday and perhaps a bit of diurnal cumulus over the weekend.

Highs will remain cool, and after tonight lows will follow suit.

&&

.AVIATION /18Z WEDNESDAY THROUGH MONDAY/...
IFR cigs will prevail along with low vsbys for the Cincy metro area
where the upper low will be traversing this afternoon and early
evening. A very slow moving band of showers will knock on the Cincy
and Lunken terminals for the first hour to hour and a half of the
forecast. Cigs may rise in these showers, but this pattern has only
been noted in the Scioto Valley and central Ohio terminals.

CMH/LCK may have the IFR cigs rise at times to VFR later this
afternoon but then drop back to MVFR overnight, clearing early
tomorrow. The remaining TAF sites will see clearing later in the
morning/early afternoon. East wind will prevail across all terminals
around 8-10kt.

OUTLOOK...MVFR to IFR ceilings will continue into Thursday morning.

&&

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

&&

$$

DISCUSSION...Franks
AVIATION...Franks

NWS ILN Office Area Forecast Discussion