Isabela in september: average Weather, Temperature and Climate
Weather in Isabela in september 2025
The weather in Isabela in the month of september comes from statistical datas on the past years. You can view the weather statistics for the whole month, but also by using the tabs for the beginning, the middle and the end of the month.
Average weather throughout september
tolerable weather UV index: 7
Weather at 6am
81°F
Clear/Sunny
56% of time
31%
8%
5%
Weather at 12pm
86°F
Clear/Sunny
37% of time
23%
20%
16%
Weather at 6pm
83°F
Heavy rain
34% of time
30%
22%
14%
Weather at 3am
81°F
54%
24%
19%
4%
Evolution of daily average temperature and precipitation in Isabela in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Isabela in september.
The climate of Isabela in september is tolerable
the weather in Isabela in september is wet (with 11.3in of precipitation over 14 days). Unfortunately, the weather conditions is worsening than the previous month since in august there is an average of 9.8in of precipitation over 14 days.
The climate good around this city september. The high seasonal norm is 86°F. The seasonal minimum is 81°F. Thus, the mean temperature average in september in Isabela is 85°F. These temperatures are far removed from those records observed in Isabela in september with a maximum record of 92°F in 2015 and a minimum record of 76°F in 2021. You can expect to have about 12 days with temperatures up to 86°F, or 40 of time.
On average, in Isabela, the days of september last 12:14. Sunrise is at 06:16 and sunset is at 18:30.
With a correct climate, the month of september is okay (but not the best) to go in Isabela in Puerto Rico.
September: another location in Puerto Rico?
If you want to go to Puerto Rico in september, there are destinations with better weather than Isabela:
In september, San Juan, Bayamón, Vieques, Carolina, Ceiba and Fajardo have good weather.
Seasonal average climate and temperature of Isabela in september
Check below seasonal norms These statistics are set from the weather statements of the past years of the month of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 85°F | ||||
| Highest temperature | 86°F | ||||
| Lowest temperature | 81°F | ||||
| Highest record temperature | 92°F (2015) | ||||
| Lowest record temperature | 76°F (2021) | ||||
| Number of days at +86°F | 12 day(s) (40%) | ||||
| Number of days at +65°F | 30 day(s) (100%) | ||||
| Sea temperature | |||||
| Average sea temperature | 85°F | ||||
| Lowest sea temperature | 84°F | ||||
| Highest sea temperature | 86°F | ||||
| Wind | |||||
| Wind speed | 18km/h | ||||
| Wind temperature | 81°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 11.3in | ||||
| Number of days with rainfall | 14 day(s) (46%) | ||||
| Record daily rainfall | 12.9in (2017) | ||||
| Other climate data | |||||
| Humidity | 81% | ||||
| Visibility | 9.29km | ||||
| Cloud cover | 26% | ||||
| UV index | 7 | ||||
| Daily sunshine hours | 11 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 06:16 | ||||
| Time of sunset | 18:30 | ||||
| Length of day | 12:14 | ||||
| Our opinion about the weather in september | |||||
| Our opinion at whereandwhen.net | tolerable | ||||
How was the weather last september?
Here is the day by day recorded weather in Isabela in september 2024:
76°F to 86°F
76°F to 86°F
77°F to 92°F
76°F to 88°F
76°F to 85°F
76°F to 88°F
76°F to 86°F
77°F to 88°F
77°F to 85°F
76°F to 86°F
76°F to 88°F
77°F to 88°F
77°F to 88°F
77°F to 90°F
77°F to 90°F
76°F to 90°F
72°F to 90°F
77°F to 88°F
74°F to 90°F
76°F to 86°F
74°F to 85°F
76°F to 88°F
77°F to 86°F
77°F to 86°F
77°F to 90°F
77°F to 86°F
76°F to 88°F
76°F to 88°F
72°F to 88°F
74°F to 86°F
Map: other cities in Puerto Rico in september
Cities near Isabela:
| Quebradillas in september | tolerable weather |
| Aguadilla in september | tolerable weather |
| San Sebastian in september | tolerable weather |
| Hatillo in september | tolerable weather |
| Anasco in september | tolerable weather |
| Rincon in september | tolerable weather |
| Arecibo in september | tolerable weather |
| Mayagüez in september | tolerable weather |
| Hormigueros in september | tolerable weather |
| Utuado in september | tolerable weather |
| San German in september | tolerable weather |
| Cabo Rojo in september | tolerable weather |
Click over cities on the map for information about the weather in september.
Isabela
perfect weather
good
tolerable
bad
very bad
Weather data for Isabela in september:
Weather data for Isabela for september are derived from an average of the weather forecast since 2009 in Isabela. There is a margin of error and these forecasts are to be considered as general information only. The weather in Isabela can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to Isabela.