| < September >
|Normal Max/ High Temperature
|Min/ Low Temperature
|Average Daylight per day
|Sun altitude at solar noon on the 21st day.
- The average temperature in San Juan/ Isla Verde Arp, Pr in September is very hot at 28.1 °C (82.58 °F).
- Afternoons can be very, very hot with average high temperatures reaching 31.6 °C (88.9 °F).
- Overnight temperatures are generally fairly hot with an average low of 24.6 °C (76.3 °F).
- The average daily temperature variation/ range in September is 7 °C (12.6 °F).
- The weather in September is far from dry. Some 134.1mm (5.3in) of H2O falls.
- The shortest day is 11:57 long and the longest day is 12:28 long with an average length of 12:12.
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Weather Trend Graph for September in San Juan/ Isla Verde Arp, Pr, Usa
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