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Moncks Corner, South Carolina 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
NWS Forecast for Moncks Corner SC
National Weather Service Forecast for: Moncks Corner SC
Issued by: National Weather Service Charleston, SC
Updated: 5:46 pm EDT Jul 25, 2025
 
Tonight

Tonight: Mostly clear, with a low around 75. South wind around 5 mph becoming calm  in the evening.
Mostly Clear

Saturday

Saturday: Sunny, with a high near 99. Heat index values as high as 111. Calm wind.
Sunny

Saturday
Night
Saturday Night: Mostly clear, with a low around 78. Calm wind.
Mostly Clear

Sunday

Sunday: Sunny and hot, with a high near 101. Heat index values as high as 112. Calm wind.
Hot

Sunday
Night
Sunday Night: Partly cloudy, with a low around 79. Calm wind.
Partly Cloudy

Monday

Monday: A 30 percent chance of showers and thunderstorms after 2pm.  Mostly sunny and hot, with a high near 101.
Mostly Sunny
then Chance
T-storms
Monday
Night
Monday Night: A 30 percent chance of showers and thunderstorms before 2am.  Partly cloudy, with a low around 76.
Chance
T-storms
Tuesday

Tuesday: A 40 percent chance of showers and thunderstorms after 2pm.  Mostly sunny, with a high near 96.
Mostly Sunny
then Chance
T-storms
Tuesday
Night
Tuesday Night: A 30 percent chance of showers and thunderstorms, mainly before 8pm.  Partly cloudy, with a low around 76.
Chance
T-storms
Lo 75 °F Hi 99 °F Lo 78 °F Hi 101 °F Lo 79 °F Hi 101 °F Lo 76 °F Hi 96 °F Lo 76 °F

Heat Advisory
Extreme Heat Watch
 

Tonight
 
Mostly clear, with a low around 75. South wind around 5 mph becoming calm in the evening.
Saturday
 
Sunny, with a high near 99. Heat index values as high as 111. Calm wind.
Saturday Night
 
Mostly clear, with a low around 78. Calm wind.
Sunday
 
Sunny and hot, with a high near 101. Heat index values as high as 112. Calm wind.
Sunday Night
 
Partly cloudy, with a low around 79. Calm wind.
Monday
 
A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 101.
Monday Night
 
A 30 percent chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 76.
Tuesday
 
A 40 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 96.
Tuesday Night
 
A 30 percent chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 76.
Wednesday
 
A 40 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 96.
Wednesday Night
 
A 30 percent chance of showers and thunderstorms. Partly cloudy, with a low around 75.
Thursday
 
A 50 percent chance of showers and thunderstorms. Mostly sunny, with a high near 96.
Thursday Night
 
A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 74.
Friday
 
Showers and thunderstorms. High near 93. Chance of precipitation is 80%.

 

Forecast from NOAA-NWS for Moncks Corner SC.

Weather Forecast Discussion
480
FXUS62 KCHS 252155
AFDCHS

Area Forecast Discussion
National Weather Service Charleston SC
555 PM EDT Fri Jul 25 2025

.SYNOPSIS...
Atlantic high pressure will prevail into early next week, while
a trough of low pressure resides inland.

&&

.NEAR TERM /THROUGH SATURDAY/...
Water vapor imagery shows the center of a ridge of high pressure off
the NC/SC coast, with models indicating the strength at 500 mb near
595 dm. At the surface, a high pressure is east of the GA/FL coast
and a broad low pressure over the deep south. This has resulted in
weak south-southwesterly flow with temperatures in the upper 80s to
lower 90s, rising into lower to mid 90s area-wide before decreasing
into the evening hours. With dewpoints in the mid/upper 70s, heat
index values of 104-107 are expected this afternoon. However,
portions of the South Carolina Lowcountry will likely see heat index
values of 108+ for a few hours this afternoon, so have issued a Heat
Advisory for today and will carry it overnight into tomorrow given
this is the start of the prolonged heat wave for the region.

As for chances for rain, we`ve observed a few showers attempting to
form, but with the strong downward vertical motion from the ridge
storms have not been able to sustain themselves. In the northwest
quadrant of the surface high across southeastern GA, weak positive
theta-e advection in combination with the sea-breeze will attempt to
create additional showers/tstorms, as evident by the agitated cu
field along the sea-breeze in southeastern GA. For tonight, expect
the warm conditions to continue with overnight lows only dipping
down into the lower to upper 70s, warmest along the coast. May be
able to break record high minimum temperatures, but current forecast
has us staying 2 degrees on the cool side.

&&

.SHORT TERM /SATURDAY NIGHT THROUGH MONDAY/...
Main focus for the period will be the long-duration heat set to
impact the region. Heat Advisories and/or Extreme Heat
Watches/Warnings will likely be needed.

A strong mid level ridge, noted by 500 mb heights 2-3 standard
deviations above normal per NAEFS, will become situated overhead for
the weekend and early next week. At the surface, trough will reside
inland, while high pressure remains offshore with a weak gradient
locally. This pattern supports very hot temperatures and limited
precipitation, especially when coinciding with the
climatologically-hottest time of year.

Temperatures...Near record high temperatures are forecast through
early next week (see climate section below). Temperatures will be
hottest Sunday and Monday when highs could exceed 100F in several
locations away from the immediate coast. Heat indices will be even
higher, likely reaching Heat Advisory criteria (108F) and even
approaching or exceeding Extreme Heat Warning criteria (113F) in
many spots. Little relief is expected overnight with lows only in
the upper 70s to around 80, which would still bring heat index
values in the upper 80s to 90s along the coast overnight. This kind
of relentless heat is dangerous to vulnerable populations even
overnight.

Convection-wise...The weekend should be fairly quiet with just
isolated showers/thunderstorms possible on Sunday, mainly from
Colleton County northward. The ridge will expand and shift slightly
westward on Monday. This could bring a slightly higher chance for
showers/thunderstorms with some signals of a weak shortwave dropping
through the area on periphery of the ridge late in the day. PoPs are
generally in the 20-30% range.

&&

.LONG TERM /MONDAY NIGHT THROUGH FRIDAY/...
The forecast area will remain under the influence of an expansive
upper ridge centered over the south central U.S. through the middle
of next week. Consensus shows a larger scale trough moving into the
northeastern U.S. late. Scattered showers and thunderstorms will be
possible each day, primarily during the afternoon when instability
is maximized. Main forecast concern remains the prolonged heat. Heat
indices have the potential to reach Heat Advisory and/or Extreme
Heat Watch/Warning criteria through at least Wednesday, perhaps
extending into Thursday as well, though increased cloud cover and
shower/storm uncertainty make this portion of the forecast less
certain.

&&

.AVIATION /22Z FRIDAY THROUGH WEDNESDAY/...
26/00z TAF Discussion:
KCHS/KJZI/KSAV: VFR through Saturday evening.

Extended Aviation Forecast: Prevailing VFR. Brief flight
restrictions are possible in afternoon showers/thunderstorms next
week.

&&

.MARINE...
Tonight: South to southwest winds less than 15 kt will prevail
through the night. Wave heights should generally range between
2 to 3 ft.

Saturday through Wednesday: No marine concerns are anticipated over
the weekend and into the middle of next week. Generally expect
southerly flow with speeds less than 15 knots. Seas will average 1-3
feet.

&&

.CLIMATE...
Record High Temperatures:

July 26:
KCHS: 99/2010

July 27:
KCHS: 100/2005
KSAV: 100/2010

July 28:
KCHS: 101/1949
KSAV: 102/1949

Record High Minimum Temperatures:

July 26:
KCHS: 78/2012

July 27:
KCHS: 80/2014
KCXM: 84/2021
KSAV: 80/1885

July 28:
KCHS: 80/2016
KCXM: 83/1999
KSAV: 81/1878

July 29:
KCHS: 80/2016

July 30:
KCHS: 81/2016
KCXM: 83/2016
KSAV: 81/1878

July 31:
KCHS: 80/2022
KSAV: 80/2010

&&

.CHS WATCHES/WARNINGS/ADVISORIES...
GA...Heat Advisory from 10 AM Saturday to 10 AM EDT Sunday for
     GAZ087-088-099>101-114>119-137>141.
     Extreme Heat Watch from Sunday morning through Monday evening
     for GAZ087-088-099>101-114>119-137>141.
SC...Heat Advisory from 10 AM Saturday to 10 AM EDT Sunday for
     SCZ040-042.
     Extreme Heat Watch from Sunday morning through Monday evening
     for SCZ040-042>045-047>052.
     Heat Advisory until 10 AM EDT Sunday for SCZ043>045-047>052.
MARINE...None.

&&

$$
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Forecast Discussion from: NOAA-NWS Script developed by: El Dorado Weather






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