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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
31
+16
+5
31 August, sun
+16
+5
Feels like
+7
663 mmHg
52%
2.6
m/s
S
31 August, Sunday. day, 16°; night, 5°; clear
1
+15
+5
1 September, mon
+15
+5
Feels like
+6
664 mmHg
56%
2.8
m/s
S
1 September, Monday. day, 15°; night, 5°; clear
2
+14
+5
2 September, tue
+14
+5
Feels like
+6
664 mmHg
57%
2.7
m/s
S
2 September, Tuesday. day, 14°; night, 5°; rain
3
+15
+4
3 September, wed
+15
+4
Feels like
+5
663 mmHg
58%
2.7
m/s
S
3 September, Wednesday. day, 15°; night, 4°; clear
4
+15
+4
4 September, thu
+15
+4
Feels like
+6
664 mmHg
55%
2.6
m/s
S
4 September, Thursday. day, 15°; night, 4°; partly cloudy
5
+16
+4
5 September, fri
+16
+4
Feels like
+6
663 mmHg
54%
2.6
m/s
SW
5 September, Friday. day, 16°; night, 4°; clear
6
+18
+4
6 September, sat
+18
+4
Feels like
+7
661 mmHg
52%
2.7
m/s
SW
6 September, Saturday. day, 18°; night, 4°; clear
7
+17
+4
7 September, sun
+17
+4
Feels like
+6
661 mmHg
52%
2.8
m/s
SW
7 September, Sunday. day, 17°; night, 4°; clear
8
+16
+4
8 September, mon
+16
+4
Feels like
+6
662 mmHg
52%
2.7
m/s
S
8 September, Monday. day, 16°; night, 4°; clear
9
+16
+4
9 September, tue
+16
+4
Feels like
+6
663 mmHg
54%
2.8
m/s
S
9 September, Tuesday. day, 16°; night, 4°; rain
10
+17
+3
10 September, wed
+17
+3
Feels like
+6
663 mmHg
55%
2.8
m/s
SW
10 September, Wednesday. day, 17°; night, 3°; clear
11
+16
+5
11 September, thu
+16
+5
Feels like
+7
663 mmHg
54%
2.8
m/s
S
11 September, Thursday. day, 16°; night, 5°; partly cloudy
12
+16
+5
12 September, fri
+16
+5
Feels like
+7
663 mmHg
54%
2.8
m/s
S
12 September, Friday. day, 16°; night, 5°; clear
13
+14
+5
13 September, sat
+14
+5
Feels like
+6
664 mmHg
54%
2.7
m/s
S
13 September, Saturday. day, 14°; night, 5°; rain
14
+16
+4
14 September, sun
+16
+4
Feels like
+6
664 mmHg
55%
2.8
m/s
S
14 September, Sunday. day, 16°; night, 4°; clear
15
+16
+5
15 September, mon
+16
+5
Feels like
+7
664 mmHg
52%
2.6
m/s
S
15 September, Monday. day, 16°; night, 5°; clear
16
+18
+5
16 September, tue
+18
+5
Feels like
+7
664 mmHg
52%
2.8
m/s
S
16 September, Tuesday. day, 18°; night, 5°; clear
17
+18
+6
17 September, wed
+18
+6
Feels like
+8
662 mmHg
49%
2.8
m/s
SW
17 September, Wednesday. day, 18°; night, 6°; clear
18
+17
+6
18 September, thu
+17
+6
Feels like
+8
662 mmHg
50%
3
m/s
S
18 September, Thursday. day, 17°; night, 6°; clear
19
+16
+5
19 September, fri
+16
+5
Feels like
+7
663 mmHg
52%
3.1
m/s
S
19 September, Friday. day, 16°; night, 5°; clear
20
+17
+5
20 September, sat
+17
+5
Feels like
+7
663 mmHg
50%
2.7
m/s
S
20 September, Saturday. day, 17°; night, 5°; clear
21
+19
+6
21 September, sun
+19
+6
Feels like
+9
663 mmHg
50%
2.8
m/s
S
21 September, Sunday. day, 19°; night, 6°; clear
22
+18
+7
22 September, mon
+18
+7
Feels like
+9
663 mmHg
50%
3
m/s
S
22 September, Monday. day, 18°; night, 7°; clear
23
+17
+6
23 September, tue
+17
+6
Feels like
+8
664 mmHg
54%
2.8
m/s
S
23 September, Tuesday. day, 17°; night, 6°; rain
24
+17
+6
24 September, wed
+17
+6
Feels like
+9
664 mmHg
54%
2.7
m/s
S
24 September, Wednesday. day, 17°; night, 6°; clear
25
+18
+7
25 September, thu
+18
+7
Feels like
+9
664 mmHg
52%
2.6
m/s
S
25 September, Thursday. day, 18°; night, 7°; clear
26
+17
+8
26 September, fri
+17
+8
Feels like
+9
664 mmHg
55%
3
m/s
S
26 September, Friday. day, 17°; night, 8°; rain
27
+17
+7
27 September, sat
+17
+7
Feels like
+9
663 mmHg
58%
3
m/s
S
27 September, Saturday. day, 17°; night, 7°; rain
28
+17
+6
28 September, sun
+17
+6
Feels like
+8
664 mmHg
57%
2.9
m/s
S
28 September, Sunday. day, 17°; night, 6°; rain
29
+19
+7
29 September, mon
+19
+7
Feels like
+9
663 mmHg
55%
2.7
m/s
S
29 September, Monday. day, 19°; night, 7°; clear
30
+20
+7
30 September, tue
+20
+7
Feels like
+10
662 mmHg
50%
2.8
m/s
S
30 September, Tuesday. day, 20°; night, 7°; clear
1
+18
+7
1 October, wed
+18
+7
Feels like
+9
663 mmHg
57%
3
m/s
S
1 October, Wednesday. day, 18°; night, 7°; clear
2
+18
+7
2 October, thu
+18
+7
Feels like
+10
663 mmHg
55%
2.9
m/s
S
2 October, Thursday. day, 18°; night, 7°; clear
3
+18
+7
3 October, fri
+18
+7
Feels like
+9
663 mmHg
55%
3.1
m/s
S
3 October, Friday. day, 18°; night, 7°; partly cloudy
4
+18
+7
4 October, sat
+18
+7
Feels like
+9
662 mmHg
57%
3.3
m/s
S
4 October, Saturday. day, 18°; night, 7°; overcast
Average data for 10 years
San Juan September
21
sunny days
7
days with precipitation
1
cloudy day
21 sunny days; 7 days with precipitation; 1 cloudy day;
54
%
air humidity
1.7
m/s
Wind
S
45
mm of precipitation
(6% of annual average)
air humidity 54%; 45 millimeters of precipitation (6% of annual average); Wind southerly 1.7 Meters per second
Weather graphs for September
Temperature
Precipitation chance, %
Humidity, %
Wind, m/s
Pressure, mmHg
S
S
S
S
SW
SW
SW
S
S
SW
S
S
S
S
S
S
SW
S
S
S
S
S
S
S
S
S
S
S
S
S
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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