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Lancaster, Ohio 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
NWS Forecast for Lancaster OH
National Weather Service Forecast for: Lancaster OH
Issued by: National Weather Service Wilmington, OH
Updated: 4:00 am EDT Aug 13, 2025
 
Overnight

Overnight: A chance of showers and thunderstorms.  Mostly cloudy, with a low around 70. Calm wind.  Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Chance
T-storms

Wednesday

Wednesday: Showers and thunderstorms, mainly before 4pm, then showers and possibly a thunderstorm after 4pm.  High near 84. Calm wind becoming west around 5 mph in the afternoon.  Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Chance
T-storms then
T-storms
Wednesday
Night
Wednesday Night: Showers and thunderstorms likely, mainly before 11pm.  Partly cloudy, with a low around 67. Calm wind.  Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
T-storms
Likely then
Slight Chance
T-storms
Thursday

Thursday: A chance of showers and thunderstorms after 2pm.  Mostly sunny, with a high near 86. Light north wind.  Chance of precipitation is 30%.
Partly Sunny
then Chance
T-storms
Thursday
Night
Thursday Night: A chance of showers and thunderstorms before 8pm.  Mostly clear, with a low around 65. Light northeast wind.  Chance of precipitation is 30%.
Chance
T-storms then
Mostly Clear
Friday

Friday: Sunny, with a high near 88.
Sunny

Friday
Night
Friday Night: Mostly clear, with a low around 66.
Mostly Clear

Saturday

Saturday: Sunny, with a high near 90.
Sunny

Saturday
Night
Saturday Night: Mostly clear, with a low around 68.
Mostly Clear

Lo 70 °F Hi 84 °F Lo 67 °F Hi 86 °F Lo 65 °F Hi 88 °F Lo 66 °F Hi 90 °F Lo 68 °F

Hazardous Weather Outlook
 

Overnight
 
A chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Calm wind. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
 
Showers and thunderstorms, mainly before 4pm, then showers and possibly a thunderstorm after 4pm. High near 84. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
 
Showers and thunderstorms likely, mainly before 11pm. Partly cloudy, with a low around 67. Calm wind. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
 
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 86. Light north wind. Chance of precipitation is 30%.
Thursday Night
 
A chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 65. Light northeast wind. Chance of precipitation is 30%.
Friday
 
Sunny, with a high near 88.
Friday Night
 
Mostly clear, with a low around 66.
Saturday
 
Sunny, with a high near 90.
Saturday Night
 
Mostly clear, with a low around 68.
Sunday
 
Sunny, with a high near 91.
Sunday Night
 
Partly cloudy, with a low around 68.
Monday
 
Sunny, with a high near 89.
Monday Night
 
Mostly clear, with a low around 64.
Tuesday
 
Sunny, with a high near 86.

 

Forecast from NOAA-NWS for Lancaster OH.

Weather Forecast Discussion
607
FXUS61 KILN 130605
AFDILN

Area Forecast Discussion
National Weather Service Wilmington OH
205 AM EDT Wed Aug 13 2025

.SYNOPSIS...
Showers and thunderstorms are possible today as a weak cold front
drops south. Thursday will feature slightly cooler and drier
conditions before a warming trend starts on Friday and lasts into
the weekend.

&&

.NEAR TERM /THROUGH TODAY/...
The trough axis that helped spark shower and storm activity this
evening moves east of the area early this morning. The best shower
and storm coverage should keep progressing east with it only leaving
low end rain chances through the rest of the predawn hours. Some
lower stratus and patchy fog may develop around daybreak, but
substantial cloud cover seen on satellite might inhibit surface
visibility reductions.

For today, a weak cold front noses south into the area. Showers and
storms are likely to form by the afternoon ahead of the front due to
forcing and instability overlapping. High PWATs support heavy
rainfall potential, but hopefully quick enough storm motions prevent
too much localized heavy rain. Severe potential is low since shear
and DCAPE parameters are marginal.

&&

.SHORT TERM /TONIGHT THROUGH 6 PM THURSDAY/...
The weak cold front will continue progressing south through the area
during the evening hours. Shower and storm chances will persist for
locations south of the front before it clears the area later
tonight. Winds shift to the north/northwest behind the front.
Forecast lows drop into the middle 60s along and west of I-75.
Forecast lows are warmer further east.

For Thursday, northerly winds behind the front allow some slightly
cooler and drier air to work into the Ohio Valley. Forecast highs
are generally limited to the middle 80s along with dew points in the
lower 70s to upper 60s. Low end shower/storm chances still exist
along and southeast of I-71 during the afternoon due to some
instability forming. However, overall rain coverage is expected to
be low.

&&

.LONG TERM /THURSDAY NIGHT THROUGH TUESDAY/...
Surface high pressure centered along the Atlantic coast will extend
westward across the Ohio Valley through the end of the week. Heights
will be rising as a mid level high sprawls northeastwards. But that
may not be sufficient to rule out some isolated diurnal convection
on Friday.

There is spread within the guidance suite in regards to a trough
moving across eastern Canada. Some solutions suggest that this will
be strong enough to suppress the mid level ridge somewhat and thus
allow the tail end of the trough to swing across the Great Lakes on
Sunday while other solutions have the mid level high being too
strong and thus predominating the region. The former would allow a
front to push south into the region bringing a chance of showers and
storms area wide while the latter would keep the front to the north
but perhaps be in close enough proximity to bring a chance of
convection to only northern counties.

Heading towards the end of the period, even the solutions with the
stronger ridge eventually retrograde that feature allowing long wave
troughing centered over eastern Canada to extend into the mid
Atlantic resulting in northwest flow across the Great Lakes and Ohio
Valley.

Temperatures will be rising back above normal with the warmest day
on Sunday. But probabilities of the heat index reaching 100 have
fallen to below 20 percent across southern counties. Temperatures
will trend slightly lower heading into early next week.


&&

.AVIATION /05Z WEDNESDAY THROUGH SUNDAY/...
Clusters of showers and thunderstorms continue to move through the
area early this morning. VFR conditions are being observed outside
of shower and storm activity. VFR conditions may end up persisting
for most sites since the previously forecast stratus may struggle to
develop with higher clouds moving in from the west. After sunrise,
any lower ceilings that do develop should mix out to VFR cumulus for
the rest of the day. However, showers and storms are expected to
move across the region once again during the afternoon and evening
as a cold front pushes south.

Winds see remain variable through much of the predawn hours since
convection and outflow boundaries are moving across the area. After
sunrise, winds take on more of a westerly component before slowly
veering to the northwest by tonight.

OUTLOOK...Thunderstorms are possible again on Thursday.

&&

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

&&

$$

SYNOPSIS...Campbell
NEAR TERM...Campbell
SHORT TERM...Campbell
LONG TERM...
AVIATION...Campbell
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Forecast Discussion from: NOAA-NWS Script developed by: El Dorado Weather






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