| < October >
|Normal Max/ High Temperature
|Min/ Low Temperature
|Average Sea or Water Temp
|Number of Wet Days (probability of rain on a day)
|Average Sunlight per day
|Average Daylight per day
|Sunny (Cloudy) Daylight Hours
|Sun altitude at solar noon on the 21st day.
- The average sea tempeature is 29 °C (84.2 °F).
- The average temperature in San Juan in October is hot at 27 °C (80.6 °F).
- Afternoons can be very hot with average high temperatures reaching 31 °C (87.8 °F).
- Overnight temperatures are generally fairly hot with an average low of 23 °C (73.4 °F).
- The variation/ range of diurnal average temperatures in October is 8 °C (14.4 °F).
- The weather in October is very faintly moist with rain periodically. Some 148mm (5.8in) of fluid tumbles during on average 17 days.
- In October the blue above San Juan is slightly sunny having on average a welcome 7:30 of bright solar radiation per day.
- The shortest day is 11:26 long and the longest day is 11:56 long with an average length of 11:40.
- There are approximately 4:02 per day when bright sunshine is absent due to cloud, haze or the sun being too low on the horizon to register.
- It is sunny approximately 65% of daylight hours and cloudy 35% of daylight hours.
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Weather Trend Graph for October in San Juan, Puerto Rico
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