San Antonio, Texas

Last updated: 6:24 PM CDT  ·  Refresh
36°C
Feels like 38°
Mostly Clear
▲ 37°  /  ▼ 24°
Wind
9 mph SSE
Humidity
36%
Dew Point
20°
Pressure
29.10 inHg
Visibility
10 mi
UV Index
5.3
Cloud Cover
15%
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 mostly clear at 36°C. Dry conditions are expected through the next 24 hours. Atmospheric instability is elevated (CAPE up to 777 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%
7 PM
37°
25%
8 PM
34°
23%
9 PM
33°
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
33°
3%
2 PM
36°
3%
3 PM
36°
3%
4 PM
37°
3%
5 PM
37°
3%
7-Day Forecast
Tonight
37° 24°
Mostly Clear.
Thu
38° 24°
Mostly Cloudy.
Fri
38° 23°
Mostly Clear.
Sat
38° 24°
Partly Cloudy with a 32% chance of rain.
Sun
38° 24°
Mostly Clear with a 40% chance of rain.
Mon
38° 25°
Mostly Clear.
Tue
37° 25°
Partly Cloudy.
TimeTempConditionsPrecipWindHumidity
Now 36° Mostly Clear 15% 9 mph SSE 36%
7 PM 37° Clear 25% 9 mph SE 39%
8 PM 34° Clear 23% 10 mph SE 47%
9 PM 33° Clear 15% 12 mph SSE 56%
10 PM 30° Clear 8% 12 mph SSE 64%
11 PM 29° Mostly Clear 8% 11 mph SSE 68%
12 AM 28° Mostly Clear 3% 10 mph SSE 72%
1 AM 28° Partly Cloudy 3% 8 mph SSE 76%
2 AM 27° Mostly Cloudy 3% 7 mph SSE 79%
3 AM 26° Mostly Cloudy 3% 6 mph SSE 81%
4 AM 26° Mostly Cloudy 3% 5 mph SSE 84%
5 AM 26° Mostly Cloudy 3% 5 mph SSE 85%
6 AM 24° Overcast 3% 5 mph S 86%
7 AM 24° Overcast 3% 6 mph S 86%
8 AM 26° Mostly Cloudy 3% 6 mph S 81%
9 AM 27° Mostly Cloudy 3% 7 mph S 74%
10 AM 28° Mostly Cloudy 3% 8 mph S 67%
11 AM 29° Mostly Cloudy 3% 8 mph S 59%
12 PM 31° Partly Cloudy 3% 8 mph S 51%
1 PM 33° Partly Cloudy 3% 8 mph S 44%
2 PM 36° Partly Cloudy 3% 8 mph S 38%
3 PM 36° Partly Cloudy 3% 8 mph S 34%
4 PM 37° Partly Cloudy 3% 9 mph S 32%
5 PM 37° Partly Cloudy 3% 9 mph SSE 31%
15-Day Forecast
Today
7/29
Mostly Clear
15%
24°
37°
Thu
7/30
Mostly Cloudy
3%
24°
38°
Fri
7/31
Mostly Clear
3%
23°
38°
Sat
8/1
Partly Cloudy
32%
24°
38°
Sun
8/2
Mostly Clear
40%
24°
38°
Mon
8/3
Mostly Clear
14%
25°
38°
Tue
8/4
Partly Cloudy
18%
25°
37°
Wed
8/5
Partly Cloudy
15%
24°
37°
Thu
8/6
Mostly Clear
15%
24°
37°
Fri
8/7
Partly Cloudy
35%
24°
38°
Sat
8/8
Clear
16%
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
Thu 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, 22:00'Z' · F0 · 130 (13 km CONUS/NA)
Hodograph · kt
10 20 30 40 SM
0–1 1–3 3–6 6–9 km
Instability
SBCAPE914 J/kg
MLCAPE334 J/kg
MUCAPE914 J/kg
SBCIN0 J/kg
MLCIN0 J/kg
Lifted Index-1.8
Kinematics
0–6 km Shear13 kt
0–1 km Shear2 kt
Eff. Shear12 kt
0–1 km SRH10
0–3 km SRH25
Eff. SRH25
Storm Motion262° @ 13 kt
0–1 km EHI0.1
Composite Parameters
Sig. Tornado0.0
STP (eff)0.0
Supercell0.1
K-Index19.6
Thermo & Levels
PWAT1.57 in
0–3 km LR7.7 °C/km
700–500 LR5.9 °C/km
Total Totals43.6
LCL774 hPa
LFC985 hPa
EL174 hPa
Freezing Lvl17,165 ft