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

Updated: 4:00 pm EDT Aug 27, 2026

Friday Mostly Sunny Saturday Sunny Sunday Sunny Monday Mostly Sunny Tuesday Mostly Sunny Wednesday Mostly Sunny then Slight Chance Showers And T-Storms Thursday Slight Chance Showers And T-Storms   Hi 81 °F Hi 82 °F Hi 86 °F Hi 88 °F Hi 89 °F Hi 89 °F Hi 87 °F   Tonight Mostly Clear Friday Night Mostly Clear Saturday Night Mostly Clear Sunday Night Mostly Clear Monday Night Partly Cloudy Tuesday Night Partly Cloudy Wednesday Night Slight Chance Showers And T-Storms   Lo 62 °F Lo 58 °F Lo 62 °F Lo 69 °F Lo 71 °F Lo 72 °F Lo 71 °F

Forecast from NOAA-NWS for Lancaster, OH.

425
FXUS61 KILN 280007
AFDILN

Area Forecast Discussion
National Weather Service Wilmington OH
807 PM EDT Thu Aug 27 2026

.WHAT HAS CHANGED...
No significant changes.

&&

.KEY MESSAGES...
1) Cold front will exit the area today. High pressure will build in
for the end of the week.

2) Hot and humid conditions return next week.

&&

.DISCUSSION...
KEY MESSAGE 1)
Surface cold front is currently southeast of the I-71 corridor and
will be exiting our remaining counties during the late afternoon
hours. Cannot rule out an isolated shower/storm bubbling up along and
even behind the front, but chances remain very low.

Behind the frontal passage, river valley fog is expected to develop
overnight.


KEY MESSAGE 2)
A broad H5 ridge will build across a large portion of the eastern
and central CONUS late this weekend and is expected to persist
through at least the middle of next week. This feature will result in
an influx of hot and humid air, with daytime highs returning to the
90s for multiple days next week. Forecast looks to remain mostly dry
through the early part of next week before some rain chances return
midweek.

&&

.AVIATION /00Z FRIDAY THROUGH TUESDAY/...

A weak cold front has pushed southeast of the TAF sites this
afternoon. VFR cumulus clouds dissipating with the loss of heating.
Light winds and clear skies will likely lead to river valley fog
tonight. KLUK will likely have some IFR vsby reductions. Elsewhere,
overland fog is not as favorable due to somewhat drier air, so kept
out any mention for now.

Light northerly winds overnight become north-northeast at less than
10 kts Friday.

OUTLOOK...No significant weather expected.

&&

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

&&

$$

DISCUSSION...Clark
AVIATION...AR

NWS ILN Office Area Forecast Discussion