Currently: 80 °F. Passing clouds. (Weather station: Luis Munoz Marin, Puerto Rico). See more current weatherSeptember 2017 Weather in San Juan — Graph
°F
Time
Wind
(mph)
(mph)
Temp
(°F)
(°F)
74
76
78
80
82
84
86
88
90
92
94
Fri, Sep 1
Lo:81
12 am
Hi:82
2
Lo:81
6 am
Hi:88
7
Lo:86
12 pm
Hi:90
12
Lo:81
6 pm
Hi:86
11
Sat, Sep 2
Lo:79
12 am
Hi:81
3
Lo:79
6 am
Hi:90
6
Lo:84
12 pm
Hi:90
15
Lo:82
6 pm
Hi:84
8
Sun, Sep 3
Lo:79
12 am
Hi:82
4
Lo:79
6 am
Hi:88
4
Lo:81
12 pm
Hi:88
9
Lo:81
6 pm
Hi:86
5
Mon, Sep 4
Lo:79
12 am
Hi:81
1
Lo:79
6 am
Hi:90
6
Lo:84
12 pm
Hi:90
12
Lo:82
6 pm
Hi:84
7
Tue, Sep 5
Lo:81
12 am
Hi:82
2
Lo:81
6 am
Hi:88
6
Lo:81
12 pm
Hi:88
7
Lo:82
6 pm
Hi:86
11
Wed, Sep 6
Lo:84
12 am
Hi:84
12
Lo:75
6 am
Hi:84
16
Lo:81
12 pm
Hi:82
32
6 pm
N/A
0
Thu, Sep 7
12 am
N/A
0
Lo:79
6 am
Hi:88
9
Lo:82
12 pm
Hi:88
11
Lo:75
6 pm
Hi:82
7
Fri, Sep 8
Lo:77
12 am
Hi:79
3
Lo:79
6 am
Hi:88
10
Lo:84
12 pm
Hi:90
17
Lo:81
6 pm
Hi:84
7
Sat, Sep 9
Lo:81
12 am
Hi:81
2
Lo:81
6 am
Hi:88
7
Lo:82
12 pm
Hi:88
12
Lo:81
6 pm
Hi:84
6
Sun, Sep 10
Lo:81
12 am
Hi:82
6
Lo:81
6 am
Hi:90
7
Lo:90
12 pm
Hi:93
9
Lo:84
6 pm
Hi:90
6
Mon, Sep 11
Lo:82
12 am
Hi:84
2
Lo:82
6 am
Hi:91
6
Lo:82
12 pm
Hi:91
12
Lo:81
6 pm
Hi:86
6
Tue, Sep 12
Lo:81
12 am
Hi:82
2
Lo:81
6 am
Hi:91
4
Lo:86
12 pm
Hi:93
9
Lo:82
6 pm
Hi:86
6
Wed, Sep 13
Lo:79
12 am
Hi:84
2
Lo:79
6 am
Hi:91
4
Lo:86
12 pm
Hi:93
9
Lo:82
6 pm
Hi:86
6
Thu, Sep 14
Lo:81
12 am
Hi:84
1
Lo:81
6 am
Hi:91
5
Lo:82
12 pm
Hi:93
8
Lo:81
6 pm
Hi:84
9
Fri, Sep 15
Lo:81
12 am
Hi:82
6
Lo:81
6 am
Hi:90
6
Lo:88
12 pm
Hi:91
8
Lo:82
6 pm
Hi:88
4
Sat, Sep 16
Lo:81
12 am
Hi:82
4
Lo:81
6 am
Hi:91
11
Lo:86
12 pm
Hi:91
16
Lo:82
6 pm
Hi:86
7
Sun, Sep 17
Lo:82
12 am
Hi:82
1
Lo:82
6 am
Hi:90
6
Lo:81
12 pm
Hi:90
10
Lo:82
6 pm
Hi:82
1
Mon, Sep 18
Lo:81
12 am
Hi:82
0
Lo:81
6 am
Hi:88
6
Lo:84
12 pm
Hi:88
14
Lo:84
6 pm
Hi:84
12
Tue, Sep 19
Lo:84
12 am
Hi:84
12
Lo:81
6 am
Hi:88
14
Lo:81
12 pm
Hi:86
17
Lo:81
6 pm
Hi:82
22
Wed, Sep 20
Lo:79
12 am
Hi:82
38
6 am
N/A
0
12 pm
N/A
0
6 pm
N/A
0
Thu, Sep 21
12 am
N/A
0
6 am
N/A
0
Lo:84
12 pm
Hi:86
11
Lo:84
6 pm
Hi:84
11
Fri, Sep 22
Lo:90
12 am
Hi:90
12
Lo:90
6 am
Hi:90
12
Lo:84
12 pm
Hi:90
7
Lo:82
6 pm
Hi:84
4
Sat, Sep 23
Lo:82
12 am
Hi:82
6
Lo:82
6 am
Hi:86
4
12 pm
N/A
0
Lo:82
6 pm
Hi:84
6
Sun, Sep 24
Lo:81
12 am
Hi:82
5
Lo:81
6 am
Hi:91
6
Lo:88
12 pm
Hi:93
11
Lo:82
6 pm
Hi:88
6
Mon, Sep 25
Lo:81
12 am
Hi:82
1
Lo:81
6 am
Hi:88
5
Lo:88
12 pm
Hi:91
10
Lo:82
6 pm
Hi:88
7
Tue, Sep 26
Lo:81
12 am
Hi:82
4
Lo:81
6 am
Hi:88
7
Lo:84
12 pm
Hi:90
15
Lo:82
6 pm
Hi:84
9
Wed, Sep 27
Lo:81
12 am
Hi:82
0
Lo:81
6 am
Hi:88
8
Lo:81
12 pm
Hi:88
12
Lo:81
6 pm
Hi:84
11
Thu, Sep 28
Lo:79
12 am
Hi:82
5
Lo:79
6 am
Hi:88
12
Lo:84
12 pm
Hi:88
19
Lo:79
6 pm
Hi:84
9
Fri, Sep 29
Lo:79
12 am
Hi:81
4
Lo:79
6 am
Hi:88
12
Lo:82
12 pm
Hi:88
17
Lo:79
6 pm
Hi:82
7
Sat, Sep 30
Lo:79
12 am
Hi:81
4
Lo:79
6 am
Hi:82
5
Lo:75
12 pm
Hi:82
8
Lo:75
6 pm
Hi:77
2
High & Low Weather Summary for September 2017
| Temperature | Humidity | Pressure | |
|---|---|---|---|
| High | 94 °F (Sep 13, 1:56 pm) | 100% (Sep 20, 4:35 am) | 30.05 "Hg (Sep 20, 4:35 am) |
| Low | 76 °F (Sep 6, 9:17 am) | 49% (Sep 12, 12:56 pm) | 29.14 "Hg (Sep 20, 5:35 am) |
| Average | 84 °F | 80% | 29.90 "Hg |
| * Reported Sep 1 12:56 am — Sep 30 11:56 pm, San Juan. 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 Juan Weather History for September 1, 2017
Scroll right to see more
| Conditions | Comfort | |||||||
|---|---|---|---|---|---|---|---|---|
| Time | Temp | Weather | Wind | Humidity | Barometer | Visibility | ||
| 12:56 am Fri, Sep 1 | | 83 °F | Passing clouds. | No wind | ↑ | 79% | 30.01 "Hg | 10 mi |
| 1:56 am | | 83 °F | Passing clouds. | 5 mph | ↑ | 79% | 30.00 "Hg | 10 mi |
| 2:56 am | | 82 °F | Passing clouds. | 3 mph | ↑ | 79% | 29.99 "Hg | 10 mi |
| 3:56 am | | 82 °F | Passing clouds. | 3 mph | ↑ | 79% | 29.98 "Hg | 10 mi |
| 4:56 am | | 81 °F | Passing clouds. | 3 mph | ↑ | 82% | 29.98 "Hg | 10 mi |
| 5:56 am | | 80 °F | Passing clouds. | No wind | ↑ | 85% | 29.99 "Hg | 10 mi |
| 6:56 am |  | 82 °F | Light rain. Passing clouds. | No wind | ↑ | 79% | 30.02 "Hg | 10 mi |
| 7:56 am |  | 84 °F | Passing clouds. | 3 mph | ↑ | 74% | 30.04 "Hg | 10 mi |
| 8:56 am | | 86 °F | Scattered clouds. | 7 mph | ↑ | 72% | 30.05 "Hg | 10 mi |
| 9:56 am | | 87 °F | Scattered clouds. | 13 mph | ↑ | 69% | 30.05 "Hg | 10 mi |
| 10:56 am | | 87 °F | Scattered clouds. | 13 mph | ↑ | 69% | 30.05 "Hg | 10 mi |
| 11:56 am | | 88 °F | Passing clouds. | 10 mph | ↑ | 67% | 30.03 "Hg | 10 mi |
| 12:56 pm | | 88 °F | Passing clouds. | 13 mph | ↑ | 67% | 30.02 "Hg | 10 mi |
| 1:56 pm | | 89 °F | Scattered clouds. | 10 mph | ↑ | 65% | 30.00 "Hg | 10 mi |
| 2:56 pm | | 88 °F | Scattered clouds. | 15 mph | ↑ | 65% | 29.98 "Hg | 10 mi |
| 3:56 pm | | 88 °F | Scattered clouds. | 12 mph | ↑ | 67% | 29.98 "Hg | 10 mi |
| 4:56 pm | | 87 °F | Scattered clouds. | 13 mph | ↑ | 69% | 29.98 "Hg | 10 mi |
| 5:56 pm | | 86 °F | Scattered clouds. | 13 mph | ↑ | 70% | 30.00 "Hg | 10 mi |
| 6:56 pm | | 85 °F | Scattered clouds. | 13 mph | ↑ | 72% | 30.01 "Hg | 10 mi |
| 7:56 pm | | 84 °F | Passing clouds. | 10 mph | ↑ | 72% | 30.03 "Hg | 10 mi |
| 8:56 pm | | 84 °F | Light rain. Passing clouds. | 10 mph | ↑ | 74% | 30.04 "Hg | 10 mi |
| 9:56 pm | | 84 °F | Passing clouds. | 12 mph | ↑ | 77% | 30.04 "Hg | 10 mi |
| 10:56 pm | | 84 °F | Passing clouds. | 12 mph | ↑ | 74% | 30.03 "Hg | 10 mi |
| 11:56 pm | | 81 °F | Passing clouds. | 6 mph | ↑ | 77% | 30.02 "Hg | 10 mi |
| Weather by CustomWeather, © 2025 | ||||||||