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September weather forecast in San Juan
30 days
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
30 days
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Sun
Sunday
Mon
Monday
Tue
Tuesday
Wed
Wednesday
Thu
Thursday
Fri
Friday
Sat
Saturday
1
+19
+13
1 September, sun
+19
+13
Feels like
+15
703 mmHg
37%
4.6
m/s
S
1 September, Sunday. day, 19°; night, 13°; clear
2
+17
+12
2 September, mon
+17
+12
Feels like
+13
705 mmHg
38%
4.6
m/s
S
2 September, Monday. day, 17°; night, 12°; clear
3
+17
+11
3 September, tue
+17
+11
Feels like
+13
705 mmHg
36%
4.5
m/s
SE
3 September, Tuesday. day, 17°; night, 11°; clear
4
+18
+11
4 September, wed
+18
+11
Feels like
+15
704 mmHg
37%
4.3
m/s
S
4 September, Wednesday. day, 18°; night, 11°; clear
5
+20
+12
5 September, thu
+20
+12
Feels like
+16
703 mmHg
31%
4.5
m/s
SW
5 September, Thursday. day, 20°; night, 12°; clear
6
+20
+13
6 September, fri
+20
+13
Feels like
+16
703 mmHg
31%
4
m/s
S
6 September, Friday. day, 20°; night, 13°; clear
7
+22
+13
7 September, sat
+22
+13
Feels like
+18
701 mmHg
23%
4.4
m/s
NW
7 September, Saturday. day, 22°; night, 13°; clear
8
+20
+15
8 September, sun
+20
+15
Feels like
+16
702 mmHg
34%
5.5
m/s
S
8 September, Sunday. day, 20°; night, 15°; clear
9
+19
+12
9 September, mon
+19
+12
Feels like
+15
704 mmHg
31%
4.3
m/s
SE
9 September, Monday. day, 19°; night, 12°; clear
10
+20
+14
10 September, tue
+20
+14
Feels like
+16
704 mmHg
30%
4
m/s
E
10 September, Tuesday. day, 20°; night, 14°; clear
11
+20
+13
11 September, wed
+20
+13
Feels like
+16
703 mmHg
31%
5.1
m/s
S
11 September, Wednesday. day, 20°; night, 13°; clear
12
+18
+12
12 September, thu
+18
+12
Feels like
+14
704 mmHg
31%
4
m/s
S
12 September, Thursday. day, 18°; night, 12°; clear
13
+21
+13
13 September, fri
+21
+13
Feels like
+17
703 mmHg
28%
4.4
m/s
NW
13 September, Friday. day, 21°; night, 13°; clear
14
+20
+13
14 September, sat
+20
+13
Feels like
+16
703 mmHg
30%
4.6
m/s
NW
14 September, Saturday. day, 20°; night, 13°; clear
15
+21
+13
15 September, sun
+21
+13
Feels like
+17
704 mmHg
31%
4.5
m/s
S
15 September, Sunday. day, 21°; night, 13°; clear
16
+21
+13
16 September, mon
+21
+13
Feels like
+17
703 mmHg
28%
4.5
m/s
S
16 September, Monday. day, 21°; night, 13°; clear
17
+21
+14
17 September, tue
+21
+14
Feels like
+17
703 mmHg
28%
4.4
m/s
SE
17 September, Tuesday. day, 21°; night, 14°; clear
18
+21
+14
18 September, wed
+21
+14
Feels like
+17
703 mmHg
31%
5.3
m/s
S
18 September, Wednesday. day, 21°; night, 14°; clear
19
+21
+14
19 September, thu
+21
+14
Feels like
+17
703 mmHg
28%
4.6
m/s
S
19 September, Thursday. day, 21°; night, 14°; clear
20
+22
+15
20 September, fri
+22
+15
Feels like
+18
702 mmHg
28%
5
m/s
S
20 September, Friday. day, 22°; night, 15°; clear
21
+18
+14
21 September, sat
+18
+14
Feels like
+14
704 mmHg
33%
5.6
m/s
S
21 September, Saturday. day, 18°; night, 14°; clear
22
+20
+12
22 September, sun
+20
+12
Feels like
+17
705 mmHg
31%
3.7
m/s
SE
22 September, Sunday. day, 20°; night, 12°; clear
23
+23
+14
23 September, mon
+23
+14
Feels like
+19
702 mmHg
18%
4
m/s
W
23 September, Monday. day, 23°; night, 14°; clear
24
+22
+15
24 September, tue
+22
+15
Feels like
+18
703 mmHg
25%
4.9
m/s
S
24 September, Tuesday. day, 22°; night, 15°; clear
25
+21
+15
25 September, wed
+21
+15
Feels like
+17
703 mmHg
28%
4.8
m/s
S
25 September, Wednesday. day, 21°; night, 15°; clear
26
+21
+14
26 September, thu
+21
+14
Feels like
+17
702 mmHg
31%
5
m/s
S
26 September, Thursday. day, 21°; night, 14°; clear
27
+21
+13
27 September, fri
+21
+13
Feels like
+17
702 mmHg
34%
4.5
m/s
S
27 September, Friday. day, 21°; night, 13°; clear
28
+20
+13
28 September, sat
+20
+13
Feels like
+16
703 mmHg
34%
5.3
m/s
S
28 September, Saturday. day, 20°; night, 13°; clear
29
+23
+14
29 September, sun
+23
+14
Feels like
+19
701 mmHg
28%
4.5
m/s
SE
29 September, Sunday. day, 23°; night, 14°; clear
30
+22
+14
30 September, mon
+22
+14
Feels like
+18
702 mmHg
30%
5
m/s
SE
30 September, Monday. day, 22°; night, 14°; clear
1
+20
+13
1 October, tue
+20
+13
Feels like
+16
703 mmHg
31%
4.6
m/s
SE
1 October, Tuesday. day, 20°; night, 13°; clear
2
+23
+14
2 October, wed
+23
+14
Feels like
+19
702 mmHg
30%
4.5
m/s
S
2 October, Wednesday. day, 23°; night, 14°; clear
3
+25
+16
3 October, thu
+25
+16
Feels like
+20
700 mmHg
23%
5.9
m/s
W
3 October, Thursday. day, 25°; night, 16°; clear
4
+25
+16
4 October, fri
+25
+16
Feels like
+21
701 mmHg
23%
4.8
m/s
S
4 October, Friday. day, 25°; night, 16°; clear
5
+23
+16
5 October, sat
+23
+16
Feels like
+19
702 mmHg
28%
5.4
m/s
S
5 October, Saturday. day, 23°; night, 16°; clear
Average data for 10 years
San Juan September
30
sunny days
0
days with precipitation
0
cloudy days
30 sunny days; 0 days with precipitation; 0 cloudy days;
31
%
air humidity
3.2
m/s
Wind
S
2
mm of precipitation
(3% of annual average)
air humidity 31%; 2 millimeters of precipitation (3% of annual average); Wind southerly 3.2 Meters per second
Weather graphs for September
Temperature
Precipitation chance, %
Humidity, %
Wind, m/s
Pressure, mmHg
S
S
SE
S
SW
S
NW
S
SE
E
S
S
NW
NW
S
S
SE
S
S
S
S
SE
W
S
S
S
S
S
SE
SE
1
Average data for 10 years
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Daytime temperature
Night-time temperature
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