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Current Weather Conditions:
San Marcos, San Marcos Municipal Airport, TX, United States

NWS Point Forecast for KHYI (KHYI) 29-53-37N 097-51-53W

Conditions at

2026.08.21 1656 UTC
Wind from the SW (220 degrees) at 12 MPH (10 KT)
Visibility 10 mile(s)
Sky conditions clear
Temperature 93.9 F (34.4 C)
Heat index 103.3 F (39.6 C)
Dew Point 73.0 F (22.8 C)
Relative Humidity 51%
Pressure (altimeter) 30.07 in. Hg (1018 hPa)
ob KHYI 211656Z 22010KT 10SM CLR 34/23 A3007 RMK AO2 SLP173 T03440228

Maximum and Minimum Temperatures

Maximum
Temperature
F (C)
Minimum
Temperature
F (C)
82.0 (27.8) 72.0 (22.2) In the 6 hours preceding Aug 21, 2026 - 07:56 AM EDT / 2026.08.21 1156 UTC
102.9 (39.4) 71.1 (21.7) In the 24 hours preceding Aug 21, 2026 - 01:56 AM EDT / 2026.08.21 0556 UTC

24 Hour Summary

Time
EDT (UTC)
Temperature
F (C)
Dew Point
F (C)
Pressure
Inches (hPa)
Wind
MPH
Weather
Latest 1 PM (17) Aug 21 93.9 (34.4) 73.0 (22.8) 30.07 (1018) SW 12
Noon (16) Aug 21 91.0 (32.8) 73.9 (23.3) 30.08 (1018) SW 12
11 AM (15) Aug 21 86.0 (30.0) 75.9 (24.4) 30.08 (1018) SSW 10
10 AM (14) Aug 21 81.0 (27.2) 75.9 (24.4) 30.08 (1018) SSW 7
9 AM (13) Aug 21 77.0 (25.0) 75.0 (23.9) 30.07 (1018) S 6 mist
8 AM (12) Aug 21 73.0 (22.8) 72.0 (22.2) 30.06 (1017) S 3 mist
7 AM (11) Aug 21 75.9 (24.4) 73.9 (23.3) 30.05 (1017) Calm
6 AM (10) Aug 21 78.1 (25.6) 75.0 (23.9) 30.04 (1017) S 7
5 AM (9) Aug 21 78.1 (25.6) 75.0 (23.9) 30.04 (1017) S 6
4 AM (8) Aug 21 79.0 (26.1) 73.9 (23.3) 30.05 (1017) S 6
3 AM (7) Aug 21 81.0 (27.2) 73.9 (23.3) 30.05 (1017) S 7
2 AM (6) Aug 21 82.0 (27.8) 73.9 (23.3) 30.04 (1017) S 7
1 AM (5) Aug 21 84.0 (28.9) 73.0 (22.8) 30.03 (1016) S 12
Midnight (4) Aug 21 87.1 (30.6) 71.1 (21.7) 30.02 (1016) S 13
11 PM (3) Aug 20 89.1 (31.7) 71.1 (21.7) 29.99 (1015) SSE 16
10 PM (2) Aug 20 93.0 (33.9) 71.1 (21.7) 29.95 (1014) SSE 17
9 PM (1) Aug 20 97.0 (36.1) 66.9 (19.4) 29.94 (1013) SSE 9
8 PM (0) Aug 20 99.0 (37.2) 66.0 (18.9) 29.93 (1013) SE 10
7 PM (23) Aug 20 100.9 (38.3) 66.0 (18.9) 29.94 (1013) SSE 9
6 PM (22) Aug 20 102.9 (39.4) 66.9 (19.4) 29.94 (1013) WSW 12
5 PM (21) Aug 20 99.0 (37.2) 68.0 (20.0) 29.96 (1014) S 6
4 PM (20) Aug 20 100.9 (38.3) 70.0 (21.1) 29.98 (1015) SE 12
3 PM (19) Aug 20 99.0 (37.2) 71.1 (21.7) 30.01 (1016) Variable 6
Oldest 2 PM (18) Aug 20 97.0 (36.1) 72.0 (22.2) 30.03 (1016) SSE 9
Time
EDT (UTC)
Temperature
F(C)
Dew Point
F(C)
Pressure
Inches(hPa)
Wind
(MPH)
Weather

The information presented here is taken from products produced by the U.S. National Weather Service and other national and international agencies




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