San Antonio, TX Hourly Forecast

Texas, United States 🇺🇸
78°
Sunny Feels like 85°
Updated 32 min ago

San Antonio temperature trend - Next 24 hours

78° 8 AM 8 AM - 78°F (26°C), Sunny, 14% precip 9 AM - 81°F (27°C), Sunny, 11% precip 10 AM - 84°F (29°C), Sunny, 6% precip 93° 11 AM 11 AM - 93°F (34°C), Sunny 12 PM - 97°F (36°C), Sunny 1 PM - 94°F (35°C), Sunny 97° 2 PM 2 PM - 97°F (36°C), Overcast, 9% precip 3 PM - 98°F (37°C), Overcast, 9% precip 4 PM - 99°F (37°C), Overcast, 8% precip 99° 5 PM 5 PM - 99°F (37°C), Cloudy, 6% precip 6 PM - 99°F (37°C), Partly Cloudy 7 PM - 98°F (36°C), Partly Cloudy 95° 8 PM 8 PM - 95°F (35°C), Overcast, 8% precip 9 PM - 90°F (32°C), Overcast, 8% precip 10 PM - 86°F (30°C), Overcast, 10% precip 84° 11 PM 11 PM - 84°F (29°C), Cloudy, 6% precip 12 AM - 82°F (28°C), Overcast, 12% precip 1 AM - 81°F (27°C), Cloudy, 8% precip 79° 2 AM 2 AM - 79°F (26°C), Overcast, 12% precip 3 AM - 78°F (26°C), Overcast, 14% precip 4 AM - 77°F (25°C), Overcast, 15% precip 76° 5 AM 5 AM - 76°F (25°C), Overcast, 16% precip 6 AM - 76°F (24°C), Overcast, 17% precip 7 AM - 76°F (24°C), Overcast, 18% precip

The next 24 hours at a glance

  • Warmest hour: 4 PM - around 99°
  • Coolest hour: 7 AM - around 76°
  • Rain risk: low all day (peaks at 18%)
  • UV peak: 2 PM at index 10 - sun protection recommended
  • Windiest: 9 PM at 14 mph

San Antonio hourly weather - Tuesday, August 18

In San Antonio, expect a high near 99°F (37°C) around 4 PM and a low of 78°F (26°C) near 8 AM, with no meaningful precipitation risk.

TimeConditionsTemp FeelsRainWind HumidityUV
8 AM Sunny 78° 85° 14% 4 mph SSW 89% 0
9 AM Sunny 81° 87° 11% 4 mph SSW 82% 1
10 AM Sunny 84° 91° 6% 4 mph SSW 70% 3
11 AM Sunny 93° 108° 4% 4 mph SSE 62% 6
12 PM Sunny 97° 111° 2% 5 mph SSE 52% 8
1 PM Sunny 94° 94° 1% 6 mph SSE 32% 10
2 PM Overcast 97° 96° 9% 7 mph SSE 28% 10
3 PM Overcast 98° 96° 9% 9 mph SSE 26% 9
4 PM Overcast 99° 96° 8% 10 mph SSE 25% 6
5 PM Cloudy 99° 96° 6% 9 mph SSE 24% 4
6 PM Partly Cloudy 99° 96° 4% 8 mph SSE 24% 1
7 PM Partly Cloudy 98° 95° 2% 8 mph SSE 25% 0
8 PM Overcast 95° 94° 8% 6 mph S 28% 0
9 PM Overcast 90° 86° 8% 14 mph SSE 34% 0
10 PM Overcast 86° 86° 10% 13 mph SSE 43% 0
11 PM Cloudy 84° 84° 6% 11 mph S 48% 0

San Antonio hourly weather - Wednesday, August 19

In San Antonio, expect a high near 101°F (38°C) around 5 PM and a low of 76°F (24°C) near 7 AM; precipitation risk peaks at 18% around 7 AM.

TimeConditionsTemp FeelsRainWind HumidityUV
12 AM Overcast 82° 83° 12% 9 mph S 54% 0
1 AM Cloudy 81° 82° 8% 7 mph SSE 56% 0
2 AM Overcast 79° 80° 12% 6 mph SSE 55% 0
3 AM Overcast 78° 79° 14% 6 mph S 59% 0
4 AM Overcast 77° 78° 15% 7 mph S 63% 0
5 AM Overcast 76° 78° 16% 7 mph SSW 67% 0
6 AM Overcast 76° 78° 17% 7 mph SSW 68% 0
7 AM Overcast 76° 77° 18% 6 mph SSW 69% 0
8 AM Overcast 76° 78° 17% 7 mph SSW 68% 0
9 AM Overcast 78° 79° 15% 8 mph SSW 62% 1
10 AM Overcast 82° 83° 13% 9 mph SSW 54% 3
11 AM Overcast 86° 86° 10% 9 mph SSW 42% 6
12 PM Overcast 90° 88° 9% 8 mph SSW 35% 8
1 PM Overcast 93° 90° 9% 8 mph S 30% 10
2 PM Cloudy 96° 93° 6% 7 mph S 26% 10
3 PM Sunny 98° 95° 1% 8 mph SSE 22% 9
4 PM Sunny 100° 95° 0% 9 mph SSE 19% 6
5 PM Sunny 101° 95° 0% 10 mph SSE 18% 4
6 PM Sunny 100° 95° 0% 9 mph SSE 18% 2
7 PM Sunny 99° 94° 0% 9 mph SSE 19% 0
8 PM Sunny 97° 93° 0% 7 mph SE 22% 0
9 PM Clear 95° 91° 0% 9 mph SE 25% 0
10 PM Clear 85° 86° 2% 16 mph SSE 49% 0
11 PM Clear 82° 85° 3% 13 mph SSE 61% 0

San Antonio hourly weather - Thursday, August 20

In San Antonio, expect a high near 102°F (39°C) around 5 PM and a low of 75°F (24°C) near 7 AM; precipitation risk peaks at 18% around 6 AM.

TimeConditionsTemp FeelsRainWind HumidityUV
12 AM Clear 80° 83° 5% 11 mph SSE 70% 0
1 AM Clear 79° 82° 7% 10 mph S 76% 0
2 AM Clear 79° 82° 7% 9 mph S 75% 0
3 AM Clear 78° 81° 7% 7 mph S 75% 0
4 AM Clear 77° 82° 8% 5 mph SSE 77% 0
5 AM Clear 77° 81° 10% 6 mph SSE 80% 0
6 AM Cloudy 76° 81° 18% 6 mph SSE 82% 0
7 AM Partly Cloudy 75° 80° 14% 6 mph SSE 84% 0
8 AM Partly Cloudy 77° 81° 13% 6 mph SSE 81% 0
9 AM Sunny 80° 83° 6% 7 mph S 70% 1
10 AM Sunny 84° 87° 3% 8 mph S 58% 3
11 AM Sunny 89° 91° 1% 9 mph S 48% 6
12 PM Sunny 92° 95° 1% 9 mph S 40% 8
1 PM Sunny 96° 95° 1% 9 mph SSE 33% 10
2 PM Sunny 98° 97° 0% 9 mph SSE 27% 10
3 PM Sunny 100° 98° 1% 8 mph SSE 23% 9
4 PM Cloudy 101° 98° 5% 8 mph SSE 21% 6
5 PM Cloudy 102° 99° 5% 7 mph SSE 20% 4
6 PM Overcast 101° 99° 9% 6 mph SE 20% 2
7 PM Overcast 100° 98° 9% 6 mph SE 21% 0
8 PM Overcast 98° 97° 9% 4 mph SE 24% 0
9 PM Overcast 89° 91° 11% 18 mph SSE 47% 0
10 PM Thundery outbreaks in nearby 85° 88° 8% 15 mph SSE 57% 0
11 PM Cloudy 83° 86° 12% 12 mph SSE 64% 0

Quick answers for the hours ahead

What is the warmest hour in San Antonio today?
4 PM is forecast to be the warmest, at about 99°F (37°C) with overcast.
Will it rain in San Antonio tonight?
Unlikely - the evening precipitation chance stays at or below 10%.
When is the UV index highest in San Antonio today?
Around 2 PM, when it reaches 10. From UV 3 upward, sun protection is recommended.

San Antonio hour-by-hour: what to expect

Over the next 24 hours in San Antonio, temperatures range from 76°F (24°C) around 7 AM up to 99°F (37°C) near 4 PM - about 3°F (2°C) above the typical August high of 96°F (36°C).

A stray shower can't be ruled out - Rain chances top out at 18% around 7 AM. UV reaches 10 (2 PM) - sun protection recommended through midday.

The “feels like” column blends humidity and wind into an apparent temperature - see how it works in our feels-like temperature guide. Planning further ahead? Check the San Antonio 14-day forecast or the monthly climate averages.

Hourly forecasts nearby