Gustavia in september: average Weather, Temperature and Climate
Weather in Gustavia in september 2025
The weather in Gustavia in september comes from statistical datas on the last years. You can view the weather statistics for the whole month, but also by clicking on 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
85°F
Moderate rain at times
40% of time
34%
12%
11%
Weather at 12pm
85°F
Partly Cloudy
34% of time
31%
18%
12%
Weather at 6pm
85°F
Moderate rain at times
35% of time
29%
20%
14%
Weather at 3am
85°F
43%
33%
13%
7%
Evolution of daily average temperature and precipitation in Gustavia in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Gustavia in september.
The climate of Gustavia in september is tolerable
The climate in september in Gustavia is wet (with 8.3in of precipitation over 11 days). The weather is better from the previous month since in august it receives an average of 8.4in of rainfall over 11 days.
The climate pleasant in this location this month. The thermometer averaged maximum of 86°F. In the morning the temperature drops to 83°F. Thus, the mean temperature average in september in Gustavia is 85°F. Note that these seasonal averages are in contrast with those observed in Gustavia in the month of september with a maximum record of 86°F in 2009 and a minimum record of 72°F in 2020. You can expect to have about 5 days with temperatures above 86°F, or 17 of the month.
In september in Gustavia, the days on average last 12:14. Sunrise is at 05:59 and sets at 18:13.
With a correct weather, this month is okay (but not good) to go in this locality.
Seasonal average climate and temperature of Gustavia in september
Check below seasonal norms These statistics are compiled from the weather statements earlier years of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 85°F | ||||
| Highest temperature | 86°F | ||||
| Lowest temperature | 83°F | ||||
| Highest record temperature | 86°F (2009) | ||||
| Lowest record temperature | 72°F (2020) | ||||
| Number of days at +86°F | 5 day(s) (17%) | ||||
| 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 | 87°F | ||||
| Wind | |||||
| Wind speed | 23km/h | ||||
| Wind temperature | 85°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 8.3in | ||||
| Number of days with rainfall | 11 day(s) (38%) | ||||
| Record daily rainfall | 9.9in (2017) | ||||
| Other climate data | |||||
| Humidity | 78% | ||||
| Visibility | 9.43km | ||||
| Cloud cover | 39% | ||||
| UV index | 7 | ||||
| Daily sunshine hours | 12 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 05:59 | ||||
| Time of sunset | 18:13 | ||||
| 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 Gustavia in september 2024:
83°F to 86°F
85°F to 85°F
85°F to 85°F
83°F to 85°F
83°F to 85°F
83°F to 86°F
83°F to 85°F
83°F to 85°F
83°F to 85°F
83°F to 85°F
83°F to 85°F
83°F to 85°F
83°F to 85°F
85°F to 86°F
85°F to 86°F
83°F to 85°F
83°F to 85°F
83°F to 85°F
83°F to 85°F
83°F to 85°F
83°F to 85°F
83°F to 85°F
83°F to 85°F
83°F to 85°F
85°F to 85°F
85°F to 86°F
85°F to 85°F
85°F to 86°F
85°F to 85°F
83°F to 85°F
Map: other cities in Saint-Barthelemy in september
Cities near Gustavia:
| Nikki Beach in september | tolerable weather |
| Colombier (Saint-Barth) in september | tolerable weather |
| Chevreau Island in september | tolerable weather |
| Frégate Island in september | tolerable weather |
| Grand Cul-de-Sac in september | tolerable weather |
| Fourchue Island in september | tolerable weather |
Click over cities on the map for information about the weather in september.
Gustavia
perfect weather
good
tolerable
bad
very bad
Weather data for Gustavia in september:
Weather data for Gustavia for september are derived from an average of the weather forecast since 2009 in Gustavia. There is a margin of error and these forecasts are to be considered as general information only. The weather in Gustavia 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 Gustavia.