The Weather Network
Weather
Maps
News
Video
|
Welcome
Monthly
⋮
Current
Hourly
7 Days
14 Days
Weekend
Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
San Juan, Luis MM Int'l Airport,
Content continues below
September
Average Temperature
High
29°
Feels 34
Low
26°
Feels 29
Average Precipitation
19 Days
Rain amount
80.5mm
Snow amount
0cm
Content continues below
Daily Historical Averages
September 2026
S
M
T
W
T
F
S
1
2
3
4
33°
5
32°
6
33°
7
33°
8
32°
9
32°
10
32°
11
32°
12
32°
13
32°
14
32°
15
32°
16
32°
17
32°
18
32°
19
20
21
22
23
24
25
26
27
28
29
30
Forecast
Friday, September 4, 2026
Day
33°
Feels 38
Wind
29 km/h E
Gust
43 km/h
Humidity
57%
P.O.P
40%
Rain
~1 mm
Night
27°
Feels 30
Wind
21 km/h SE
Gust
32 km/h
Humidity
85%
P.O.P
0%
Historical Averages
Sep 4
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.