Currently: 96 °F. Scattered clouds. (Weather station: San Antonio International Airport, USA). See more current weatherSeptember 2018 Weather in San Antonio — Graph
°F
Time
Wind
(mph)
(mph)
Temp
(°F)
(°F)
63
66
69
72
75
78
81
84
87
90
93
96
Sat, Sep 1
Lo:75
12 am
Hi:79
5
Lo:75
6 am
Hi:88
5
Lo:91
12 pm
Hi:97
8
Lo:82
6 pm
Hi:93
14
Sun, Sep 2
Lo:79
12 am
Hi:81
8
Lo:77
6 am
Hi:88
4
Lo:90
12 pm
Hi:97
10
Lo:81
6 pm
Hi:91
12
Mon, Sep 3
Lo:77
12 am
Hi:81
6
Lo:79
6 am
Hi:82
6
Lo:86
12 pm
Hi:93
7
Lo:70
6 pm
Hi:90
14
Tue, Sep 4
Lo:73
12 am
Hi:75
4
Lo:73
6 am
Hi:77
5
Lo:79
12 pm
Hi:88
4
Lo:79
6 pm
Hi:82
7
Wed, Sep 5
Lo:75
12 am
Hi:79
6
Lo:75
6 am
Hi:86
6
Lo:82
12 pm
Hi:91
8
Lo:79
6 pm
Hi:84
7
Thu, Sep 6
Lo:75
12 am
Hi:79
4
Lo:75
6 am
Hi:86
5
Lo:75
12 pm
Hi:90
12
Lo:75
6 pm
Hi:79
2
Fri, Sep 7
Lo:75
12 am
Hi:75
5
Lo:73
6 am
Hi:81
4
Lo:77
12 pm
Hi:90
7
Lo:75
6 pm
Hi:88
6
Sat, Sep 8
Lo:77
12 am
Hi:79
1
Lo:77
6 am
Hi:84
8
Lo:82
12 pm
Hi:86
9
Lo:79
6 pm
Hi:82
6
Sun, Sep 9
Lo:73
12 am
Hi:77
5
Lo:72
6 am
Hi:73
5
Lo:75
12 pm
Hi:81
7
Lo:73
6 pm
Hi:79
7
Mon, Sep 10
Lo:72
12 am
Hi:73
6
Lo:72
6 am
Hi:72
7
Lo:72
12 pm
Hi:73
7
Lo:72
6 pm
Hi:73
5
Tue, Sep 11
Lo:70
12 am
Hi:72
4
Lo:72
6 am
Hi:79
7
Lo:79
12 pm
Hi:84
5
Lo:73
6 pm
Hi:82
7
Wed, Sep 12
Lo:73
12 am
Hi:73
4
Lo:73
6 am
Hi:81
5
Lo:84
12 pm
Hi:88
8
Lo:75
6 pm
Hi:84
8
Thu, Sep 13
Lo:73
12 am
Hi:73
4
Lo:73
6 am
Hi:81
9
Lo:81
12 pm
Hi:88
10
Lo:75
6 pm
Hi:81
6
Fri, Sep 14
Lo:73
12 am
Hi:75
6
Lo:73
6 am
Hi:79
8
Lo:73
12 pm
Hi:84
11
Lo:73
6 pm
Hi:75
7
Sat, Sep 15
Lo:73
12 am
Hi:75
11
Lo:73
6 am
Hi:75
10
Lo:75
12 pm
Hi:79
16
Lo:75
6 pm
Hi:75
10
Sun, Sep 16
Lo:73
12 am
Hi:75
8
Lo:73
6 am
Hi:79
7
Lo:73
12 pm
Hi:82
9
Lo:72
6 pm
Hi:77
1
Mon, Sep 17
Lo:70
12 am
Hi:72
1
Lo:70
6 am
Hi:84
2
Lo:84
12 pm
Hi:90
9
Lo:77
6 pm
Hi:84
4
Tue, Sep 18
Lo:75
12 am
Hi:77
5
Lo:75
6 am
Hi:82
4
Lo:84
12 pm
Hi:90
8
Lo:77
6 pm
Hi:86
7
Wed, Sep 19
Lo:75
12 am
Hi:79
4
Lo:75
6 am
Hi:84
6
Lo:86
12 pm
Hi:90
10
Lo:79
6 pm
Hi:84
12
Thu, Sep 20
Lo:77
12 am
Hi:79
10
Lo:75
6 am
Hi:84
9
Lo:79
12 pm
Hi:86
11
Lo:75
6 pm
Hi:79
8
Fri, Sep 21
Lo:79
12 am
Hi:79
11
Lo:79
6 am
Hi:82
12
Lo:82
12 pm
Hi:86
11
Lo:79
6 pm
Hi:84
7
Sat, Sep 22
Lo:72
12 am
Hi:79
9
Lo:70
6 am
Hi:72
10
Lo:72
12 pm
Hi:75
11
Lo:68
6 pm
Hi:72
7
Sun, Sep 23
Lo:66
12 am
Hi:66
4
Lo:68
6 am
Hi:75
5
Lo:75
12 pm
Hi:79
6
Lo:73
6 pm
Hi:77
5
Mon, Sep 24
Lo:72
12 am
Hi:73
2
Lo:72
6 am
Hi:82
2
Lo:82
12 pm
Hi:86
8
Lo:77
6 pm
Hi:84
7
Tue, Sep 25
Lo:75
12 am
Hi:77
9
Lo:75
6 am
Hi:84
11
Lo:86
12 pm
Hi:90
8
Lo:81
6 pm
Hi:88
11
Wed, Sep 26
Lo:77
12 am
Hi:79
7
Lo:79
6 am
Hi:84
7
Lo:79
12 pm
Hi:90
8
Lo:70
6 pm
Hi:82
14
Thu, Sep 27
Lo:66
12 am
Hi:70
12
Lo:64
6 am
Hi:70
9
Lo:73
12 pm
Hi:81
6
Lo:70
6 pm
Hi:75
6
Fri, Sep 28
Lo:64
12 am
Hi:68
1
Lo:64
6 am
Hi:79
2
Lo:79
12 pm
Hi:82
6
Lo:73
6 pm
Hi:79
9
Sat, Sep 29
Lo:73
12 am
Hi:73
6
Lo:73
6 am
Hi:77
7
Lo:73
12 pm
Hi:81
6
Lo:72
6 pm
Hi:79
6
Sun, Sep 30
Lo:72
12 am
Hi:72
3
Lo:72
6 am
Hi:81
3
Lo:81
12 pm
Hi:82
7
Lo:72
6 pm
Hi:77
6
Saturday, September 1, 2018, 12:00 am — 6:00 am
79 / 75 °F
Passing clouds.
Humidity: 81%
Barometer: 29.9 "Hg
ESE
Wind: 4.971 mph
High & Low Weather Summary for September 2018
| Temperature | Humidity | Pressure | |
|---|---|---|---|
| High | 97 °F (Sep 2, 4:51 pm) | 97% (Sep 4, 1:51 am) | 30.13 "Hg (Sep 4, 1:51 am) |
| Low | 64 °F (Sep 28, 6:51 am) | 34% (Sep 1, 4:51 pm) | 29.74 "Hg (Sep 2, 5:51 pm) |
| Average | 78 °F | 80% | 29.93 "Hg |
| * Reported Sep 1 12:51 am — Sep 30 11:51 pm, San Antonio. Weather by CustomWeather, © 2025 | |||
Note: Actual official high and low records may vary slightly from our data, if they occured in-between our weather recording intervals... More about our weather records
San Antonio Weather History for September 1, 2018
Scroll right to see more
| Conditions | Comfort | |||||||
|---|---|---|---|---|---|---|---|---|
| Time | Temp | Weather | Wind | Humidity | Barometer | Visibility | ||
| 12:51 am Sat, Sep 1 |  | 79 °F | Clear. | 8 mph | ↑ | 74% | 29.88 "Hg | 10 mi |
| 1:51 am | | 79 °F | Clear. | 9 mph | ↑ | 77% | 29.88 "Hg | 10 mi |
| 2:58 am |  | 77 °F | Passing clouds. | 5 mph | ↑ | 79% | 29.93 "Hg | 10 mi |
| 3:58 am | | 76 °F | Passing clouds. | 5 mph | ↑ | 82% | 29.94 "Hg | 10 mi |
| 4:51 am | | 76 °F | Passing clouds. | 3 mph | ↑ | 85% | 29.88 "Hg | 10 mi |
| 5:51 am | | 75 °F | Passing clouds. | No wind | ↑ | 88% | 29.87 "Hg | 10 mi |
| 6:51 am | | 75 °F | Passing clouds. | 3 mph | ↑ | 88% | 29.87 "Hg | 10 mi |
| 7:51 am | | 76 °F | Passing clouds. | 3 mph | ↑ | 88% | 29.89 "Hg | 10 mi |
| 8:51 am | | 79 °F | Passing clouds. | 7 mph | ↑ | 77% | 29.89 "Hg | 10 mi |
| 9:51 am | | 82 °F | Scattered clouds. | 6 mph | ↑ | 67% | 29.90 "Hg | 10 mi |
| 10:51 am | | 85 °F | Scattered clouds. | 3 mph | ↑ | 59% | 29.90 "Hg | 10 mi |
| 11:51 am | | 88 °F | Scattered clouds. | 8 mph | ↑ | 52% | 29.88 "Hg | 10 mi |
| 12:51 pm | | 91 °F | Scattered clouds. | 10 mph | ↑ | 45% | 29.87 "Hg | 10 mi |
| 1:51 pm |  | 93 °F | Partly sunny. | 7 mph | ↑ | 41% | 29.85 "Hg | 10 mi |
| 2:51 pm | | 95 °F | Partly sunny. | 6 mph | ↑ | 37% | 29.82 "Hg | 10 mi |
| 3:51 pm | | 95 °F | Partly sunny. | 6 mph | ↑ | 36% | 29.79 "Hg | 10 mi |
| 4:51 pm | | 96 °F | Scattered clouds. | 6 mph | ↑ | 34% | 29.76 "Hg | 10 mi |
| 5:51 pm | | 96 °F | Scattered clouds. | 15 mph | ↑ | 35% | 29.75 "Hg | 10 mi |
| 6:51 pm | | 93 °F | Passing clouds. | 13 mph | ↑ | 38% | 29.75 "Hg | 10 mi |
| 7:51 pm | | 92 °F | Scattered clouds. | 12 mph | ↑ | 41% | 29.77 "Hg | 10 mi |
| 8:51 pm | | 90 °F | Passing clouds. | 14 mph | ↑ | 45% | 29.79 "Hg | 10 mi |
| 9:51 pm | | 88 °F | Passing clouds. | 16 mph | ↑ | 52% | 29.84 "Hg | 10 mi |
| 10:51 pm | | 86 °F | Passing clouds. | 17 mph | ↑ | 61% | 29.85 "Hg | 10 mi |
| 11:51 pm | | 83 °F | Passing clouds. | 16 mph | ↑ | 63% | 29.85 "Hg | 10 mi |
| Weather by CustomWeather, © 2025 | ||||||||