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

Updated: 4:00 pm EDT Sep 24, 2026

This Afternoon Mostly Sunny Friday Sunny Saturday Mostly Sunny Sunday Sunny Monday Sunny Tuesday Sunny Wednesday Partly Sunny then Slight Chance Rain Showers   Hi 66 °F Hi 67 °F Hi 69 °F Hi 69 °F Hi 68 °F Hi 69 °F Hi 75 °F     Tonight Clear Friday Night Partly Cloudy Saturday Night Clear Sunday Night Mostly Clear Monday Night Mostly Clear Tuesday Night Partly Cloudy Wednesday Night Chance Rain Showers   Lo 44 °F Lo 47 °F Lo 47 °F Lo 49 °F Lo 50 °F Lo 55 °F Lo 61 °F

Forecast from NOAA-NWS for Lancaster, OH.

665
FXUS61 KILN 241718
AFDILN

Area Forecast Discussion
National Weather Service Wilmington OH
118 PM EDT Thu Sep 24 2026

.WHAT HAS CHANGED...
Added river valley fog for tonight, otherwise nothing significant.

&&

.KEY MESSAGES...
1) A stretch of dry weather and seasonably cool temperatures can be
expected through the weekend before temperatures start to warm back
up next week.

&&

.DISCUSSION...
KEY MESSAGE 1)
Drier mid level air will advect into the region from east to west and
break up cloud cover this afternoon, starting at the issuance of this
product in central Ohio and then working its way westward, reaching
the OH/IN/KY border by early evening. This will be the start of a
prolonged stretch of drier weather.

While T/Td spread looks to be unfavorable for fog overnight tonight,
the dry air that will be in place will permit radiational cooling
over sheltered areas, in particular river valleys. Do not see this
lasting long or being overly dense attm, but future shifts will need
to look closer at later models to discern this threat.

Synoptically, the Ohio Valley remains on the western periphery of an
upper level trough, which is driving the cooler/cloudier pattern. We
will begin to see a large cut off low develop along the Atlantic
Coast, creating a blocking pattern through the weekend. This will
result in a fairly stagnant weather pattern through the next several
days, with a constant advection of some drier air out of the NE.
Thus, a much needed stretch of drier weather conditions are expected,
along with temperatures that will trend below seasonal normals.

&&

.AVIATION /13Z THURSDAY THROUGH MONDAY/...
VFR conditions will be found in central Ohio and CMH/LCK through the
forecast. Low mvfr stratus is a far cry better than the IFR cigs seen
this morning. This stratus will break up from east to west, reaching
ILN/DAY by nightfall, and shortly after nightfall at CVG/LUK. All
terminals will have clear skies for the overnight period, tomorrow,
and the near future.

Surface winds remain out of the ENE through the taf period, generally
between under 8 kts, lightest overnight.

Some river valley fog primarily impacting KLUK is possible.

OUTLOOK...No significant weather is expected.

&&

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

&&

$$

DISCUSSION...Franks
AVIATION...Franks

NWS ILN Office Area Forecast Discussion