San Antonio, Texas 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

748
FXUS64 KEWX 251136 AAA
AFDEWX

Area Forecast Discussion...UPDATED
National Weather Service Austin/San Antonio TX
536 AM CST Thu Dec 25 2025

...New AVIATION...

.KEY MESSAGES...

- Unseasonably warm weather continues through the week, with daily
  max records possible through Saturday

- A strong cold front arrives late Sunday

- A near widespread freeze is possible Tuesday morning

&&

.SHORT TERM...
(Tonight through Friday night)
Issued at 1020 PM CST Wed Dec 24 2025

Fog forecasting has been a challenge this week. Given the very
warm and moist conditions at low levels, we`ll assume a similarly
difficult to predict scenario where areas of fog are possible but
not necessarily inevitable. Light winds and high dew points in the
50s to low 60s could support fog just about anywhere in the CWA and
even some dense fog. Will favor persistence and avoid the mention
of dense fog, given only a few areas seeing it in the CWA this
morning.

The upper ridge will maintain a strong amplitude over TX today but
gets flattened a bit by Friday. Rather than having a moderating
impact on our area temperatures, the low level winds will become
more southwest, bringing hot Mexican plateau air into the region
to make for what should be the hottest days of the week if not
month for Friday afternoon. Lower amounts of moisture in the air
could help with lower overnight minimums however, and perhaps
we`ll see less fog.

&&

.LONG TERM...
(Saturday through next Thursday)
Issued at 1020 PM CST Wed Dec 24 2025

Another day of near record high temperatures is expected Saturday,
but less of a SW component in low level winds should have the
maxes fall a few degrees shy of those expected Friday. As a polar
trough approaches Sunday, the surface winds should become stronger
onshore, leading to more daytime cloudiness, lower maxes, and
perhaps an episode of morning drizzle. This polar trough is quite
sharp over the northern plains states with strong fetch of
Canadian air to move into state late Sunday. A brief round of
showers could announce the front as it reaches South TX, and this
may be the last rain day of the year. Little or no rains are
expected over the Hill Country or Edwards Plateau. Strong winds
should follow the front mainly in the overnight hours, but gusty
and dry conditions could lead to elevated fire weather concerns
during the midday hours Monday. With dprog/dt trends on the polar
trough becoming more sharp there could be an opportunity for the
coldest min temps of the season by Tuesday. Roughly half the
forecast area has yet to see a first freeze, so we may see this
cold air mass finish out our Freeze Warning program for the cold
season either Tuesday or Wednesday morning. Temperatures should
recover back to more seasonably cool by Thursday.

&&

.AVIATION...
(12Z TAFS)
Issued at 532 AM CST Thu Dec 25 2025

Once again, fog and low ceilings have been slow to materialize at
the I-35 sites. While some dense fog is noted at a few locations
in South Central Texas, the threat for impacts at the terminals is
rather low. An improvement to VFR ceilings is likely after 19Z
today with south to southeasterly winds. A return to MVFR/IFR
ceilings is expected after 06Z tonight.

&&

.CLIMATE...

Issued at 1020 PM CST Wed Dec 24 2025

Record High Temperatures

                        12-25       12-26        12-27
Austin Bergstrom       91 (1955)      85 (2016)        82 (2024)
Austin Camp Mabry      90 (1955)      84 (2016)        79 (2021/1954)
San Antonio            90 (1955)      83 (2016/2008)   82 (2005)
Del Rio                87 (1955)      80 (2024)        84 (2005)

Record High Minimum Temperatures

                        12-25          12-26           12-27
Austin Bergstrom       68 (2016)      73 (2015)       68 (1971)
Austin Camp Mabry      68 (2016)      70 (2016)       67 (2021)
San Antonio            67 (2016)      71 (2015)       68 (1971)
Del Rio                63 (2015)      60 (2021)       65 (2019)

&&

.PRELIMINARY POINT TEMPS/POPS...
Austin Camp Mabry              79  64  82  65 /   0   0   0   0
Austin Bergstrom Intl Airport  79  63  82  65 /   0   0   0   0
New Braunfels Muni Airport     79  63  81  64 /   0   0   0   0
Burnet Muni Airport            79  61  81  62 /   0   0   0   0
Del Rio Intl Airport           81  60  82  61 /   0   0   0   0
Georgetown Muni Airport        80  63  82  64 /   0   0   0   0
Hondo Muni Airport             81  60  82  61 /   0   0   0   0
San Marcos Muni Airport        80  63  82  64 /   0   0   0   0
La Grange - Fayette Regional   80  64  82  65 /   0   0   0   0
San Antonio Intl Airport       79  64  81  66 /   0   0   0   0
Stinson Muni Airport           81  66  82  66 /   0   0   0   0

&&

.EWX WATCHES/WARNINGS/ADVISORIES...
None.
&&

$$

SHORT TERM...18
LONG TERM....18
AVIATION...MMM