Orbital Overview BlendedModel
Home BlendedModel Radar Hourly
BlendedModel City Forecast

San Antonio, TX Weather Forecast

View the 9-day weather forecast for San Antonio, Texas, including daily highs and lows, rain chances, rainfall amounts, wind speeds, humidity, and short-range versus extended BlendedModel guidance.

The latest 9-day BlendedModel forecast for San Antonio, Texas is in. The warmest stretch peaks on Thu near 96, while the coolest low settles in on Sat near 74. The best rain signal shows up on Sat at 70 percent and about 0.54 inches. The outlook starts with a near-term signal before shifting to extended signal later in the period.

Forecast data refreshed automatically every few hours. Showing the latest available BlendedModel forecast for San Antonio, Texas.

Last updated:

Latest BlendedModel forecast loaded for San Antonio, Texas.

About BlendedModel
BlendedModel is an experimental forecast system developed by Engineer.Guide Research and Development Lab. Forecast pages are refreshed automatically every few hours so you always see the latest guidance.

9-Day Outlook for San Antonio, Texas

A scan-first 9-day view generated for fast daily reading, with the main call for each day and the core details underneath.

Today's Weather Story
Today looks cloudy with low rain chances, light wind, and humid air, and a low storm signal.
National Weather Service
Extreme Heat Warning
Extreme Heat Warning issued June 18 at 2:29AM CDT until June 18 at 8:00PM CDT by NWS Austin/San Antonio TX
Severe · Expected · Starts 2026-06-18T02:29:00-05:00 · Expires 2026-06-18T20:00:00-05:00
Check Hourly Timing
A quick look at the next several hours for temperature, rain chance, wind, and storm signal.
7 AM CDT
79°
Cloudy
Precip 0% · Wind 6 mph
8 AM CDT
79°
Cloudy
Precip 0% · Wind 4 mph
9 AM CDT
81°
Cloudy
Precip 0% · Wind 8 mph
10 AM CDT
84°
Cloudy
Precip 0% · Wind 7 mph
11 AM CDT
86°
Cloudy
Precip 0% · Wind 6 mph
Low Storm Signal · Near-Term Signal
12 PM CDT
88°
Partly Cloudy
Precip 0% · Wind 7 mph
Low Storm Signal · Near-Term Signal
1 PM CDT
91°
Sunny
Precip 0% · Wind 8 mph
Low Storm Signal · Near-Term Signal
2 PM CDT
93°
Sunny
Precip 0% · Wind 8 mph
Low Storm Signal · Near-Term Signal
3 PM CDT
95°
Sunny
Precip 0% · Wind 8 mph
Low Storm Signal · Near-Term Signal
4 PM CDT
96°
Partly Cloudy
Precip 0% · Wind 6 mph
Low Storm Signal · Near-Term Signal
5 PM CDT
95°
Sunny
Precip 0% · Wind 8 mph
Low Storm Signal · Near-Term Signal
6 PM CDT
91°
Sunny
Precip 0% · Wind 10 mph
Low Storm Signal · Near-Term Signal
Thu
Jun 18
96°
Low 79°
Near-Term Signal
Cloudy
Precip 0% · Rain 0.00 in · Wind 10 mph · Humidity 97%
Thunder Index
26/100
Low Storm Signal
A 0-100 signal blending near-term storm ingredients with extended pattern guidance.
Storm Signal
Early guidance signal
Fri
Jun 19
88°
Low 78°
Near-Term Signal
Cloudy
Precip 0% · Rain 0.00 in · Wind 9 mph · Humidity 95%
Thunder Index
26/100
Low Storm Signal
Storm Signal
Early guidance signal
Sat
Jun 20
85°
Low 74°
Extended Signal
Light rain possible
Precip 70% · Rain 0.54 in · Wind 6 mph · Humidity 92%
Thunder Index
57/100
Thunderstorm Possible
Storm Signal
Early guidance signal
Check hourly timing Radar near San Antonio
Sun
Jun 21
92°
Low 78°
Extended Signal
Humid
Precip 35% · Rain 0.09 in · Wind 12 mph · Humidity 93%
Thunder Index
32/100
Low Storm Signal
Storm Signal
Early guidance signal
Mon
Jun 22
92°
Low 79°
Extended Signal
Humid
Precip 20% · Rain 0.01 in · Wind 12 mph · Humidity 89%
Thunder Index
22/100
Low Storm Signal
Storm Signal
Early guidance signal
Tue
Jun 23
91°
Low 78°
Extended Signal
Humid
Precip 20% · Rain 0.02 in · Wind 10 mph · Humidity 90%
Thunder Index
30/100
Low Storm Signal
Storm Signal
Early guidance signal
Wed
Jun 24
91°
Low 76°
Extended Signal
Humid
Precip 20% · Rain 0.00 in · Wind 8 mph · Humidity 93%
Thunder Index
26/100
Low Storm Signal
Storm Signal
Early guidance signal
Thu
Jun 25
92°
Low 75°
Extended Signal
Humid
Precip 20% · Rain 0.01 in · Wind 11 mph · Humidity 93%
Thunder Index
27/100
Low Storm Signal
Storm Signal
Early guidance signal
Fri
Jun 26
91°
Low 77°
Extended Signal
Humid
Precip 20% · Rain 0.03 in · Wind 10 mph · Humidity 89%
Thunder Index
32/100
Low Storm Signal
Storm Signal
Early guidance signal
Official alerts, when active, come from the National Weather Service.

San Antonio Weather Questions, Answered

Quick answers generated from the latest 9-day BlendedModel forecast for San Antonio, Texas.

Will it rain today in San Antonio?

Rain is unlikely in San Antonio, TX today, with only a 0 percent chance of precipitation.

How hot will it get in San Antonio today?

Today's forecast for San Antonio, TX calls for a high near 96 degrees and a low around 79 degrees.

Are thunderstorms expected in San Antonio this week?

Thunderstorms are possible in San Antonio, TX this week. The highest storm signal is on Sat with a Thunder Index of 57 out of 100.

What is the warmest day this week in San Antonio?

Thu looks like the warmest day in San Antonio, TX, with a high near 96 degrees.

Nearby Forecasts

Quick links to a few nearby cities if you want to compare the next 9 days around San Antonio, Texas.

Browse all BlendedModel pages