San Antonio, Texas 7 Day Weather Forecast

Wx Forecast - Wx Discussion - Wx Aviation

753
FXUS64 KEWX 191037
AFDEWX

Area Forecast Discussion
National Weather Service Austin/San Antonio TX
537 AM CDT Thu Mar 19 2026

...New AVIATION...

.KEY MESSAGES...

- Well above average high temperatures through the middle of next
  week with record highs possible Friday through Sunday.

- Elevated fire weather conditions possible most days due to low
  minimum humidities across portions of South Central Texas.

&&

.SHORT TERM...
(Today through Friday)
Issued at 1225 AM CDT Thu Mar 19 2026

A moist lower level airmass on southerly flow brings areas of low
clouds and patchy fog to many areas early this morning, then the
flow turns more southwesterly tonight keeping the low clouds and
patchy fog mainly east of I-35 Friday morning. Mixing will clear out
the low clouds and fog by mid morning each day. A mid level ridge
centered over Arizona expands to over Texas by Friday. Mixing with
the warming temperatures aloft due to the ridge expansion maintains
the warming trend with highs around the records Friday. See CLIMATE
section below for details. Subsidence underneath the ridge and below
seasonal average moisture levels keep rain out of the forecast.
Local fire weather issues persist in the short term and continue
into the long term. See FIRE WEATHER section below for details.

&&
     FM201200 22003KT 6SM BR SKC

.LONG TERM...
(Friday night through Wednesday)
Issued at 1225 AM CDT Thu Mar 19 2026

The mid level ridge continues to build over Texas this weekend.
Mixing with the unseasonably warm and dry mid levels maintains high
temperatures around record levels Saturday and Sunday. See CLIMATE
section below for details. The mid level ridge weakens and retreats
to the west allowing a brief cold frontal incursion early next week.
As a result, high temperatures back off from record levels, though
remain well above average. High temperatures warm again mid week
ahead of a late week cold front. Although, high temperatures remain
well above average, low temperatures are only slightly above
average. Similar to the short term, no rain is expected through
middle of next week. The late week cold front likely brings below
average temperatures and possibly a few showers.

&&

.AVIATION...
(12Z TAFS)
Issued at 533 AM CDT Thu Mar 19 2026

VFR skies are likely for the entire 24 hour period for
DRT/AUS/SST. At SAT, a brief pocket of clouds are forming nearby over
the Hill Country and could expand south for a few hours before
mixing out. Rapid refresh models have been trending drier as has
been the latest NAM. Thus there`s also a good chance there will be
no restrictions at SAT through the period as well. A building heat
wave will probably decrease the odds of overcast low clouds going
into Friday and the weekend as well. South winds have a morning SW
component as well, which should reinforce the drier scenario.

&&

.FIRE WEATHER...
Issued at 1131 PM CDT Wed Mar 18 2026

Mixing with warm/dry mid level air maintains minimum humidities
in the teens and 20s through the forecast with teens across many
areas on Friday through Sunday and along the Rio Grande next week.
On most days, winds will be light at 10 mph or less with only
elevated fire weather conditions possible. Wind speeds increase to
10 to 15 mph with gusts to 20 to 25 mph across many areas on
Sunday and with the lowest minimum humidities on that day, near
critical fire weather conditions are possible. Overnight recovery
of humidities will mainly be good through the period, especially
from portions of the the Hill Country across the I-35 corridor to
the Coastal Plains with poor to moderate across the Edwards
Plateau and Rio Grande Plains, at times.

&&

.CLIMATE...
Issued at 1231 PM CDT Wed Mar 18 2026

Record |  Friday   |  Saturday      |  Sunday   |

          (03/20)     (03/21)          (03/22)

AUS    | 92 (1976) | 90 (1952)      | 98 (1971) |
ATT   | 91 (1976) | 91 (1952/1917) | 96 (1971) |
SAT    | 93 (1976) | 94 (1904)      | 96 (1971) |
DRT   | 96 (1932) | 93 (1916/1907) | 96 (1995) |

&&

.PRELIMINARY POINT TEMPS/POPS...
Austin Camp Mabry              87  57  92  60 /   0   0   0   0
Austin Bergstrom Intl Airport  86  54  91  58 /   0   0   0   0
New Braunfels Muni Airport     84  52  89  56 /   0   0   0   0
Burnet Muni Airport            85  55  91  58 /   0   0   0   0
Del Rio Intl Airport           86  56  94  60 /   0   0   0   0
Georgetown Muni Airport        86  56  92  60 /   0   0   0   0
Hondo Muni Airport             84  50  91  54 /   0   0   0   0
San Marcos Muni Airport        85  53  90  57 /   0   0   0   0
La Grange - Fayette Regional   84  55  89  58 /   0   0   0   0
San Antonio Intl Airport       85  55  90  58 /   0   0   0   0
Stinson Muni Airport           85  54  90  57 /   0   0   0   0

&&

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

$$

SHORT TERM...04
LONG TERM....04
AVIATION...18