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

Updated: 4:00 am EDT Oct 29, 2026

Thursday Sunny Friday Sunny Saturday Mostly Cloudy Sunday Mostly Cloudy then Slight Chance Light Rain Monday Chance Light Rain Tuesday Chance Light Rain Wednesday Chance Light Rain   Hi 75 °F Hi 69 °F Hi 65 °F Hi 69 °F Hi 70 °F Hi 72 °F Hi 70 °F   Overnight Clear Thursday Night Mostly Clear Friday Night Partly Cloudy Saturday Night Cloudy Sunday Night Chance Light Rain Monday Night Slight Chance Light Rain Tuesday Night Chance Light Rain   Lo 48 °F Lo 48 °F Lo 43 °F Lo 48 °F Lo 49 °F Lo 52 °F Lo 53 °F

Forecast from NOAA-NWS for Lancaster, OH.

612
FXUS61 KILN 290439
AFDILN

Area Forecast Discussion
National Weather Service Wilmington OH
1239 AM EDT Thu Oct 29 2026

.WHAT HAS CHANGED...
No significant changes.

&&

.KEY MESSAGES...
1) Well above normal temperatures will continue today. A weak cold
front will drop southeast across the area tonight, bringing somewhat
cooler temperatures as we head into the weekend.

2) A series of upper level disturbances will result in occasional
rain chances through the first half of next week.

&&

.DISCUSSION...
KEY MESSAGE 1)
Southwest low level flow will continue today ahead of a weak cold
front dropping down from the northwest. This will lead to the
continuation of well above normal temperatures, with afternoon highs
in the mid to upper 70s.

Moisture is limited with the cold front tonight, but some of the
high res models are trying to produce isolated-scattered light rain
showers in an axis of weak instability along and ahead the front
across our northwest this evening. Any shower activity will then
likely dissipate as the front pushes southeast overnight and we lose
the diurnal instability.

Weak low level CAA behind the front will lead to a slight cool down
with highs on Friday ranging from the upper 60s north to the lower
70s in the south and highs on Saturday in the 65 to 70 degree range.


KEY MESSAGE 2)
There remains some uncertainty with the strength of mid level energy
moving into the Ohio Valley through the second half of the weekend
and how much moisture will accompany it. The ECMWF and Canadian are
pretty weak/dry with the system while the GFS and the tail end of
the NAM are trying to bring pcpn in from the southwest through the
day on Sunday. As a result, will keep some chances for pcpn Sunday
into Sunday night, but confidence is not very high.

Models continue to show a more dynamic system approaching from the
west through mid next week, but there remains a fair amount of spread
on the timing and strength of this system. As a result, will
continue to broad brush chance pops through much of the extended
period, with temperatures remaining several degrees above normal
through mid week.

&&

.AVIATION /04Z THURSDAY THROUGH MONDAY/...
Mostly clear skies and light winds will likely lead to some river
valley fog development through the pre dawn hours. Will allow for
some MVFR cigs to account for this at KLUK later this morning.

Otherwise, expect mainly clear skies to prevail through much of the
day. A weak cold front will drop down across the area tonight. This
will lead to an increase in clouds this evening, but cigs will
remain VFR. A few light showers will also be possible this evening
as the front moves into the area, with the best chance for this
being along and north of the I-70 corridor.

OUTLOOK...MVFR ceilings and visibilities possible Sunday.

&&

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

&&

$$

DISCUSSION...JGL
AVIATION...JGL

NWS ILN Office Area Forecast Discussion