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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

2026.08.19 2356 UTC
Wind from the S (170 degrees) at 9 MPH (8 KT)
Visibility 10 mile(s)
Sky conditions partly cloudy
Temperature 99.0 F (37.2 C)
Heat index 102.4 F (39.1 C)
Dew Point 64.9 F (18.3 C)
Relative Humidity 33%
Pressure (altimeter) 29.91 in. Hg (1012 hPa)
Pressure tendency 0.03 inches (1.0 hPa) lower than three hours ago
ob KHYI 192356Z 17008KT 10SM SCT085 37/18 A2991 RMK AO2 SLP119 T03720183 10383 20356 56010

Maximum and Minimum Temperatures

Maximum
Temperature
F (C)
Minimum
Temperature
F (C)
100.9 (38.3) 96.1 (35.6) In the 6 hours preceding Aug 19, 2026 - 07:56 PM EDT / 2026.08.19 2356 UTC
100.9 (38.3) 71.1 (21.7) In the 24 hours preceding Aug 19, 2026 - 01:56 AM EDT / 2026.08.19 0556 UTC

24 Hour Summary

Time
EDT (UTC)
Temperature
F (C)
Dew Point
F (C)
Pressure
Inches (hPa)
Wind
MPH
Weather
Latest 8 PM (0) Aug 19 99.0 (37.2) 64.9 (18.3) 29.91 (1012) S 9
7 PM (23) Aug 19 100.0 (37.8) 64.9 (18.3) 29.92 (1013) S 8
6 PM (22) Aug 19 100.9 (38.3) 64.9 (18.3) 29.92 (1013) SSW 8
5 PM (21) Aug 19 100.9 (38.3) 66.0 (18.9) 29.94 (1013) S 14
4 PM (20) Aug 19 99.0 (37.2) 66.0 (18.9) 29.98 (1015) SSE 5
3 PM (19) Aug 19 97.0 (36.1) 66.9 (19.4) 30 (1015) S 9
2 PM (18) Aug 19 96.1 (35.6) 66.0 (18.9) 30.02 (1016) SW 9
1 PM (17) Aug 19 93.0 (33.9) 68.0 (20.0) 30.04 (1017) SSW 10
Noon (16) Aug 19 90.0 (32.2) 69.1 (20.6) 30.05 (1017) SSW 13
11 AM (15) Aug 19 86.0 (30.0) 71.1 (21.7) 30.04 (1017) SW 12
10 AM (14) Aug 19 82.0 (27.8) 73.0 (22.8) 30.04 (1017) SSW 10
9 AM (13) Aug 19 75.9 (24.4) 73.0 (22.8) 30.04 (1017) S 5
8 AM (12) Aug 19 75.0 (23.9) 72.0 (22.2) 30.03 (1016) S 5
7 AM (11) Aug 19 75.9 (24.4) 72.0 (22.2) 30.01 (1016) S 3
6 AM (10) Aug 19 77.0 (25.0) 73.0 (22.8) 30.01 (1016) S 6
5 AM (9) Aug 19 78.1 (25.6) 73.0 (22.8) 30.01 (1016) SSW 6
4 AM (8) Aug 19 80.1 (26.7) 73.0 (22.8) 30.02 (1016) S 9
3 AM (7) Aug 19 81.0 (27.2) 71.1 (21.7) 30.03 (1016) S 8
2 AM (6) Aug 19 82.0 (27.8) 70.0 (21.1) 30.04 (1017) S 9
1 AM (5) Aug 19 84.9 (29.4) 69.1 (20.6) 30.03 (1016) S 13
Midnight (4) Aug 19 87.1 (30.6) 69.1 (20.6) 30.02 (1016) S 16
11 PM (3) Aug 18 88.0 (31.1) 69.1 (20.6) 29.99 (1015) SSE 14
10 PM (2) Aug 18 88.0 (31.1) 66.0 (18.9) 29.97 (1014) SSE 7
Oldest 9 PM (1) Aug 18 95.0 (35.0) 66.0 (18.9) 29.96 (1014) S 6
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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