Weather Forecast for San Antonio (US)

Texas, United States of America

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Partly cloudy

Current Weather - San Antonio (US): 19°C

Texas, United States of America

Partly cloudy

Feels like 19°C

Wind

6 km/h W

Humidity

93%

Pressure

1012 mb

UV Index

0

Visibility

16 km

Patchy rain nearby

Patchy rain nearby

Saturday, May 23, 2026

High

32°C

Low

22°C

Rain Chance

88%

Hourly Forecast

Partly Cloudy 29°C
14:00
Sunny 31°C
15:00
Sunny 29°C
16:00
Thundery outbreaks in nearby 28°C
17:00
Thundery outbreaks in nearby 27°C
18:00
Patchy light rain in area with thunder 25°C
19:00
Patchy rain nearby 24°C
20:00
Clear 23°C
21:00
Clear 23°C
22:00
Clear 22°C
23:00
May 24

Day Statistics

Maximum Wind

21 km/h

Humidity

84%

Precipitation

2 mm

UV Index

7

Visibility

10 km

Rain Chance

88%

Snow Chance

0%

Sun & Moon

Sunrise

06:37 AM

Sunset

08:23 PM

Moonrise

01:25 PM

Moonset

01:56 AM

Moon Phase

First Quarter

Moon Illumination

54%

Air Quality

PM2.5

8.6

μg/m³

PM10

10.1

μg/m³

NO₂

7.9

μg/m³

O₃

53.7

μg/m³

SO₂

1.9

μg/m³

CO

165.3

μg/m³

US EPA Index: 1 GB DEFRA Index: 1

Solar Radiation Data

Shortwave Radiation

0.59

Diffuse Radiation

0.29

DNI

0.33

GTI

0.52

Weather Alerts

Flood Watch issued May 22 at 1:10PM CDT until May 25 at 7:00PM CDT by NWS Austin/San Antonio TX

Llano; Burnet; Williamson; Kerr; Bandera; Gillespie; Kendall; Blanco; Hays; Travis; Bastrop; Lee; Medina; Bexar; Comal; Guadalupe; Caldwell; Fayette; Frio; Atascosa; Wilson; Karnes; Gonzales; De Witt; Lavaca May 22, 01:10 PM - May 24, 01:15 PM
Severity: Severe Urgency: Future

* WHAT...Flooding and flash flooding caused by excessive rainfall is possible. * WHERE...A portion of south central Texas, including the following counties, Atascosa, Bandera, Bastrop, Bexar, Blanco, Burnet, Caldwell, Comal, De Witt, Fayette, Frio, Gillespie, Gonzales, Guadalupe, Hays, Karnes, Kendall, Kerr, Lavaca, Lee, Llano, Medina, Travis, Williamson and Wilson. * WHEN...From 7 PM CDT this evening through Monday evening. * IMPACTS...There is a potential for life threatening flooding somewhere in the watch area. Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Creeks and streams may rise out of their banks. Low-water crossings may be flooded. * ADDITIONAL DETAILS... - Showers and thunderstorms will be capable of producing high rainfall rates which could quickly lead to flooding across the area. Be especially cautious as creeks, streams, and rivers may rise out of their banks quickly. Rainfall amounts of 1 to 3 inches with isolated amounts up to 6 inches are possible for the duration of the Flood Watch. - http://www.weather.gov/safety/flood

You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.

Event: Flood Watch Certainty: Possible Category: Met

Flood Watch issued May 23 at 1:17AM CDT until May 25 at 7:00PM CDT by NWS Austin/San Antonio TX

Llano; Burnet; Williamson; Kerr; Bandera; Gillespie; Kendall; Blanco; Hays; Travis; Bastrop; Lee; Medina; Bexar; Comal; Guadalupe; Caldwell; Fayette; Frio; Atascosa; Wilson; Karnes; Gonzales; De Witt; Lavaca May 23, 01:17 AM - May 25, 07:00 PM
Severity: Severe Urgency: Future

* WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...A portion of south central Texas, including the following counties, Atascosa, Bandera, Bastrop, Bexar, Blanco, Burnet, Caldwell, Comal, De Witt, Fayette, Frio, Gillespie, Gonzales, Guadalupe, Hays, Karnes, Kendall, Kerr, Lavaca, Lee, Llano, Medina, Travis, Williamson and Wilson. * WHEN...Through Monday evening. * IMPACTS...There is a potential for life threatening flooding somewhere in the watch area. Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Creeks and streams may rise out of their banks. Low-water crossings may be flooded. * ADDITIONAL DETAILS... - Showers and thunderstorms will be capable of producing high rainfall rates which could quickly lead to flooding across the area. Many locations in the watch area have already received 1 to 3 inches over the past 5 days with a few areas having received over 5 inches. Additional rounds of heavy downpours could create rapid rises in creeks, streams, and rivers. Rainfall amounts of 1 to 3 inches with isolated amounts up to 6 inches are possible for the duration of the Flood Watch. - http://www.weather.gov/safety/flood

You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.

Event: Flood Watch Certainty: Possible Category: Met

Special Weather Statement issued May 23 at 7:29AM CDT by NWS Austin/San Antonio TX

Medina May 23, 07:29 AM - May 23, 08:15 AM
Severity: Moderate Urgency: Expected

At 728 AM CDT, Doppler radar was tracking a strong thunderstorm near Hondo, moving east at 30 mph. HAZARD...Winds in excess of 40 mph and half inch hail. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Minor damage to outdoor objects is possible. Locations impacted include... Hondo, Castroville, Pearson, Noonan, New Fountain, Quihi, Dunlay, Rio Medina, Bader, and D'Hanis.

If outdoors, consider seeking shelter inside a building. Torrential rainfall is also occurring with this storm and may lead to localized flooding. Do not drive your vehicle through flooded roadways. Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle.

Event: Special Weather Statement Certainty: Observed Category: Met