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Lexington, South Carolina 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
NWS Forecast for Lexington SC
National Weather Service Forecast for: Lexington SC
Issued by: National Weather Service Columbia, SC
Updated: 12:22 am EDT Jul 27, 2025
 
Today

Today: Sunny and hot, with a high near 101. Heat index values as high as 111. West wind 3 to 6 mph.
Hot

Tonight

Tonight: Mostly clear, with a low around 80. Light and variable wind.
Mostly Clear

Monday

Monday: A chance of showers and thunderstorms after 2pm.  Increasing clouds and hot, with a high near 102. Heat index values as high as 112. Northwest wind 3 to 5 mph.  Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunny then
Chance
T-storms
Monday
Night
Monday Night: A chance of showers and thunderstorms before 2am.  Mostly cloudy, with a low around 77. Calm wind.  Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Chance
T-storms then
Chance
Showers
Tuesday

Tuesday: A slight chance of showers, then showers and thunderstorms likely after 11am.  Mostly sunny and hot, with a high near 98. Calm wind becoming east around 5 mph in the afternoon.  Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Slight Chance
T-storms then
T-storms
Likely
Tuesday
Night
Tuesday Night: Showers and thunderstorms likely before 2am, then a slight chance of showers.  Mostly cloudy, with a low around 76. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
T-storms
Likely then
Chance
Showers
Wednesday

Wednesday: A chance of showers and thunderstorms after 2pm.  Partly sunny, with a high near 96. Chance of precipitation is 50%.
Mostly Sunny
then Chance
T-storms
Wednesday
Night
Wednesday Night: A chance of showers and thunderstorms before 2am.  Mostly cloudy, with a low around 75. Chance of precipitation is 40%.
Chance
T-storms

Thursday

Thursday: A chance of showers and thunderstorms after 2pm.  Mostly sunny and hot, with a high near 97. Chance of precipitation is 50%.
Mostly Sunny
then Chance
T-storms
Hi 101 °F Lo 80 °F Hi 102 °F Lo 77 °F Hi 98 °F Lo 76 °F Hi 96 °F Lo 75 °F Hi 97 °F

Heat Advisory
Extreme Heat Watch
 

Today
 
Sunny and hot, with a high near 101. Heat index values as high as 111. West wind 3 to 6 mph.
Tonight
 
Mostly clear, with a low around 80. Light and variable wind.
Monday
 
A chance of showers and thunderstorms after 2pm. Increasing clouds and hot, with a high near 102. Heat index values as high as 112. Northwest wind 3 to 5 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday Night
 
A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 77. Calm wind. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday
 
A slight chance of showers, then showers and thunderstorms likely after 11am. Mostly sunny and hot, with a high near 98. Calm wind becoming east around 5 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
 
Showers and thunderstorms likely before 2am, then a slight chance of showers. Mostly cloudy, with a low around 76. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday
 
A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 96. Chance of precipitation is 50%.
Wednesday Night
 
A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 75. Chance of precipitation is 40%.
Thursday
 
A chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 97. Chance of precipitation is 50%.
Thursday Night
 
A chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 76. Chance of precipitation is 40%.
Friday
 
Showers and thunderstorms likely. Partly sunny, with a high near 94. Chance of precipitation is 70%.
Friday Night
 
Showers and thunderstorms likely. Mostly cloudy, with a low around 72. Chance of precipitation is 60%.
Saturday
 
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 85. Chance of precipitation is 70%.

 

Forecast from NOAA-NWS for Lexington SC.

Weather Forecast Discussion
764
FXUS62 KCAE 270542
AFDCAE

Area Forecast Discussion
National Weather Service Columbia SC
142 AM EDT Sun Jul 27 2025

.SYNOPSIS...
High pressure remains in the region this weekend, likely staying
in place into early next week. This will likely result in less
convection but also bring a prolonged period of dangerous heat
and humidity. Another Heat Advisory is in effect today into
Monday morning. Heat continues through the week, but a cold
front expected by next weekend will bring cooler temperatures
into the area.

&&

.NEAR TERM /THROUGH TONIGHT/...
Key Message(s):

- Warm and muggy conditions tonight.

- Hot and humid on Sunday with a low chance of a shower or
  thunderstorm, especially in Chesterfield County.

- Heat Advisory goes into effect at 10am and runs through the
  overnight hours.

Skies are mainly clear across the forecast area tonight with the
exception of some high clouds moving into the Eastern Midlands.
Another warm and muggy night is in store for the region with
temperatures on track to fall into the mid to upper 70s by
daybreak. If the current forecast holds true, it would be the
first low of 79 degrees or higher at KCAE since August of 2019.
Areas of patchy ground fog cannot be ruled out towards daybreak.

The intense heat and humidity continue into Sunday with a Heat
Advisory going into effect once again at 10am. Strong upper
ridging remains the primary driver of our weather today as it
slowly shifts to the west. Scattered cumulus are expected to
develop around midday but the chance of rain remains low due to
the subsidence from the aforementioned ridge and is less than
20 percent. Having said that, a passing shower or thunderstorm
cannot be ruled out but probabilities are highest across
Chesterfield County and the Pee Dee region. Highs today are
forecast to reach the upper 90s to lower 100s, with heat index
values easily reaching Heat Advisory criteria across much of the
CWA. A few spots could approach our Extreme Heat Warning
criteria of 113 degrees or higher for two or more hours, but
this appears to be too limited to upgrade the existing product
at the moment. Due to expected low temperatures around 80
degrees Sunday night, the Heat Advisory will continue through
the overnight hours.

&&

.SHORT TERM /MONDAY THROUGH MONDAY NIGHT/...
Key message(s):

- Dangerous Heat Wave will continue into early next week.

What else can be said other than what we`ve been saying? The
heat wave will continue on Monday, with temperatures rising back
above 100 degrees by the early afternoon hours. This is due to
strong ridging aloft that will still across the forecast area.
In addition, moisture in the lower levels will be on the
increase slightly, allowing for another afternoon of exceptional
heat index readings. There is still some uncertainty as to how
high those values could climb, mainly due to the potential for
better mixing through the afternoon bringing dewpoints slightly
lower than forecast, and due to an increase in convective
chances through the afternoon bringing in some cloud cover and
rain cooled air to some areas. Due to this uncertainty, will
continue with the current Extreme Heat Watch for Monday. This
will get modified later Sunday afternoon to either another Heat
Advisory, or to an Extreme Heat Warning. Either way it will be
hot and uncomfortable.

&&

.LONG TERM /TUESDAY THROUGH SATURDAY/...
Key message(s):

- Dangerous Heat Expected to Continue through mid-week with
  Diurnal Storms Possible.
- A reprieve from the hot temperatures may be on the way late in
  the week and into next weekend.

High amount of moisture will remain across the are through much
of the week, with scattered diurnal convection each day. The
upper ridge will continue to move west of the area through the
week, allowing afternoon temperatures to only reach the mid to
upper 90s. Enough moisture will be around to keep afternoon heat
index values between 100-109 into Friday. Good news near the
end of the forecast period, a cold front driven by deepening
upper trough and strong high pressure pushing into the region
from the north will drop temperatures quite a bit by Saturday.
Afternoon temperatures only in the low to middle 80s will feel
refreshing compared to what the region has been experiencing.

&&

.AVIATION /05Z SUNDAY THROUGH THURSDAY/...
VFR Conditions Persist through the Period....

High pressure keeps the region dry with generally light winds
through the TAF period. Have maintained the TEMPO for ground fog
at all terminals and brief restrictions in visibility cannot be
ruled out around daybreak. Otherwise, expect SCT cumulus to
redevelop around daybreak but with the chance of rain remaining
low, VFR conditions are likely to continue. The cumulus should
quickly diminish with the loss of daytime heating so expecting
mainly clear skies again Sunday night with light or calm winds.

EXTENDED AVIATION OUTLOOK...Afternoon convection could bring
brief periods of restrictions throughout the upcoming week as
coverage is expected to be greater than what has been seen this
weekend. With increasing moisture toward the early week, cannot
rule out a couple mornings with patchy stratus or fog.

&&

.CAE WATCHES/WARNINGS/ADVISORIES...
SC...Heat Advisory from 10 AM this morning to 10 AM EDT Monday for
     SCZ016-018-020>022-025>031-035-037-038-041-115-116-
     135>137.
     Extreme Heat Watch from Monday morning through Monday evening
     for SCZ016-018-020>022-025>031-035-037-038-041-115-116-
     135>137.
GA...Heat Advisory from 10 AM this morning to 10 AM EDT Monday for
     GAZ040-063>065-077.
     Extreme Heat Watch from Monday morning through Monday evening
     for GAZ040-063>065-077.

&&

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






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