San Antonio, Texas

Last updated: 7:28 PM CDT  ·  Refresh
36°C
Feels like 38°
Clear
▲ 36°  /  ▼ 24°
Wind
9 mph SSE
Humidity
39%
Dew Point
20°
Pressure
29.10 inHg
Visibility
10 mi
UV Index
2.9
Cloud Cover
7%
Sunrise
6:52 AM
Sunset
8:28 PM
Drag to pan · double-click to forecast a point
WeatherAI™ Analysis

WeatherAI Analysis: San Antonio is currently clear at 35°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 788 J/kg) — isolated convective development possible. Sunrise: 6:52AM · Sunset: 8:28PM.

Alerts

No active alerts for this location.
66 AQI · Moderate Dominant: PM2.5 Air Quality
Hourly Forecast · Next 24 Hours
Now
36°
15%
8 PM
34°
23%
9 PM
32°
15%
10 PM
30°
8%
11 PM
29°
8%
12 AM
28°
3%
1 AM
28°
3%
2 AM
27°
3%
3 AM
26°
3%
4 AM
26°
3%
5 AM
26°
3%
6 AM
24°
3%
7 AM
24°
3%
8 AM
26°
3%
9 AM
27°
3%
10 AM
28°
3%
11 AM
29°
3%
12 PM
31°
3%
1 PM
32°
3%
2 PM
36°
3%
3 PM
37°
3%
4 PM
37°
3%
5 PM
37°
3%
6 PM
37°
3%
7-Day Forecast
Tonight
36° 24°
Clear.
Thu
38° 24°
Partly Cloudy.
Fri
38° 23°
Partly Cloudy.
Sat
38° 24°
Partly Cloudy with a 32% chance of rain.
Sun
37° 24°
Partly Cloudy with a 28% chance of rain.
Mon
38° 25°
Mostly Clear.
Tue
37° 25°
Mostly Clear.
TimeTempConditionsPrecipWindHumidity
Now 36° Clear 15% 9 mph SSE 39%
8 PM 34° Clear 23% 10 mph SE 47%
9 PM 32° Clear 15% 12 mph SE 57%
10 PM 30° Mostly Clear 8% 12 mph SSE 64%
11 PM 29° Mostly Clear 8% 11 mph SSE 69%
12 AM 28° Mostly Clear 3% 10 mph SSE 73%
1 AM 28° Partly Cloudy 3% 8 mph SSE 76%
2 AM 27° Mostly Cloudy 3% 8 mph SSE 79%
3 AM 26° Mostly Cloudy 3% 6 mph SSE 81%
4 AM 26° Mostly Cloudy 3% 6 mph S 84%
5 AM 26° Overcast 3% 6 mph S 85%
6 AM 24° Overcast 3% 5 mph S 86%
7 AM 24° Mostly Cloudy 3% 6 mph S 84%
8 AM 26° Mostly Cloudy 3% 6 mph S 79%
9 AM 27° Mostly Cloudy 3% 7 mph S 73%
10 AM 28° Mostly Cloudy 3% 8 mph S 66%
11 AM 29° Partly Cloudy 3% 8 mph S 58%
12 PM 31° Partly Cloudy 3% 8 mph S 50%
1 PM 32° Partly Cloudy 3% 8 mph S 43%
2 PM 36° Partly Cloudy 3% 8 mph S 38%
3 PM 37° Partly Cloudy 3% 8 mph S 33%
4 PM 37° Partly Cloudy 3% 9 mph S 30%
5 PM 37° Partly Cloudy 3% 9 mph SSE 30%
6 PM 37° Partly Cloudy 3% 9 mph SSE 30%
15-Day Forecast
Today
7/29
Clear
15%
24°
36°
Thu
7/30
Partly Cloudy
3%
24°
38°
Fri
7/31
Partly Cloudy
3%
23°
38°
Sat
8/1
Partly Cloudy
32%
24°
38°
Sun
8/2
Partly Cloudy
28%
24°
37°
Mon
8/3
Mostly Clear
14%
25°
38°
Tue
8/4
Mostly Clear
18%
25°
37°
Wed
8/5
Partly Cloudy
15%
24°
37°
Thu
8/6
Mostly Clear
15%
24°
37°
Fri
8/7
Mostly Clear
35%
24°
38°
Sat
8/8
Clear
25%
24°
37°
Sun
8/9
Clear
25%
24°
38°
Mon
8/10
Clear
25%
24°
39°
Tue
8/11
Clear
3%
24°
39°
Wed
8/12
Clear
25%
24°
39°
66
Moderate
U.S. Air Quality Index · Dominant: PM2.5
50 100 150 200

Air quality is acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.

Pollutant Breakdown · Today
PM2.5
Fine particulate matter
Dominant
66 AQI 17.5 µg/m³
O3
Ground-level ozone
31 AQI 34 ppb
3-Day Outlook
DayAQICategoryO₃PM2.5
Today 66 Moderate 31 66
Fri 65 Moderate 32 65
Sat 59 Moderate 32 59
About the Air Quality Index
0–50 Good
51–100 Moderate
101–150 Unhealthy for Sensitive Groups
151–200 Unhealthy
201–300 Very Unhealthy
301–500 Hazardous

The U.S. AQI runs 0–500. The overall value equals the highest individual pollutant sub-index, and the dominant pollutant is the one driving it. PM2.5 (fine particles) is reported in µg/m³ and ozone (O3) in ppb. Forecast source: NWS NAQFC.

1000850700500400300250200150100 -40-30-20-10010203040 0.41247101624 LCLLFCEL0°C Temperature (°C) Pressure (hPa)
Temp Dewpoint Parcel (SB) CAPE CIN Dry adiabat Moist adiabat Mixing ratio
RAP
Valid Wed Jul 29, 23:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE724 J/kg
MLCAPE144 J/kg
MUCAPE724 J/kg
SBCIN-80 J/kg
MLCIN0 J/kg
Lifted Index-1.3
Kinematics
0–6 km Shear13 kt
0–1 km Shear3 kt
Eff. Shear12 kt
0–1 km SRH12
0–3 km SRH30
Eff. SRH30
Storm Motion260° @ 13 kt
0–1 km EHI0.1
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.1
K-Index15.1
Thermo & Levels
PWAT1.51 in
0–3 km LR7.3 °C/km
700–500 LR5.9 °C/km
Total Totals42.5
LCL783 hPa
LFC589 hPa
EL185 hPa
Freezing Lvl17,320 ft