Weather in San Juan: September
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Average day temperature: | 70.9°F |
| Average night temperature: | 56.1°F | |
 |
Number of sunny days: | 27 days |
| Day length: | 11.5 - 12.4 hours | |
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Number of rainy days: | 0 days |
| Precipitation totals: | 0.1 in. | |
| more information | ||
14 days
forecast
forecast
| San Juan |
weather in
October
October
| San Juan |
Air temperature in September, °F
Show year:
2025
2024
2023
The highest day temperature during September of 2025 was 86°F. At the same time the lowest night temperature was 41°F. Daily and nightly averages during September were 70.3°F and 57.1°F.
Sunny, partly cloudy and cloudy days
Mostly all days in September are sunny but cloudy days are also possible.
Precipitation total in September, in.
Precipitation total value in San Juan in September is 0.1 in. Other months of the year show relatively similar values.
Wind speed in September, mph
The average wind speed value in September is 8.9 mph
Average sunny hours
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in September is: 10.7.
Best time for vacation in San Juan
San Juan on a weather map
Places in Argentina:
Name
°F
24 Hours Forecast
San Juan
Local time: 11:19
September 15, tuesday
1200
61°F
NW
7 mph
7 mph
1500
66°F
N
14 mph
14 mph
1800
68°F
N
12 mph
12 mph
2100
70°F
NE
12 mph
12 mph
September 16, wednesday
0000
66°F
NE
13 mph
13 mph
0300
59°F
NW
11 mph
11 mph
0600
59°F
N
4 mph
4 mph
0900
50°F
N
4 mph
4 mph
