Roseau in september: average Weather, Temperature and Climate
Weather in Roseau in september 2025
The weather in Roseau in september comes from statistical datas on the past years. You can view the weather statistics for all the 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
37% of time
35%
12%
12%
Weather at 12pm
86°F
Clear/Sunny
33% of time
30%
25%
10%
Weather at 6pm
85°F
Moderate rain at times
29% of time
29%
27%
15%
Weather at 3am
85°F
42%
35%
13%
7%
Evolution of daily average temperature and precipitation in Roseau in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Roseau in september.
The climate of Roseau in september is tolerable
In september in Roseau, the climate is wet (with 8.3in of rainfall over 10 days). It should be noted an improvement from the previous month since in august it receives an average of 8.1in of rainfall over 10 days.
The climate quite nice there september. Temperatures are up to 86°F. In the morning the temperature drops to 85°F. Thus, the mean temperature average on this month of september in Roseau is 85°F. Note that seasonal normals are in contrast with those observed in Roseau in september with a maximum record of 90°F in 2021 and a minimum record of 79°F in 2021. You can plan to have about 8 days with temperatures above 86°F, or 27 of the month.
On average, in Roseau, the days of september last 12:13. The sun rises at 05:54 and sets at 18:07.
With proper weather, september is okay (but not the best) to go there.
September: another location in Dominica?
If you want to go to Dominica in september, there are destinations with better weather than Roseau:
In september, Berekua, Portsmouth, Rosalie and Saint-Joseph (Dominica) have good weather.
Seasonal average climate and temperature of Roseau 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 | 85°F | ||||
| Highest record temperature | 90°F (2021) | ||||
| Lowest record temperature | 79°F (2021) | ||||
| Number of days at +86°F | 8 day(s) (27%) | ||||
| Number of days at +65°F | 30 day(s) (100%) | ||||
| Sea temperature | |||||
| Average sea temperature | 86°F | ||||
| Lowest sea temperature | 84°F | ||||
| Highest sea temperature | 87°F | ||||
| Wind | |||||
| Wind speed | 22km/h | ||||
| Wind temperature | 85°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 8.3in | ||||
| Number of days with rainfall | 10 day(s) (32%) | ||||
| Record daily rainfall | 5.6in (2017) | ||||
| Other climate data | |||||
| Humidity | 77% | ||||
| Visibility | 9.43km | ||||
| Cloud cover | 36% | ||||
| UV index | 7 | ||||
| Daily sunshine hours | 12 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 05:54 | ||||
| Time of sunset | 18:07 | ||||
| Length of day | 12:13 | ||||
| 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 Roseau in september 2024:
83°F to 85°F
81°F to 83°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 86°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
85°F to 86°F
83°F to 86°F
83°F to 85°F
83°F to 85°F
83°F to 85°F
83°F to 86°F
83°F to 86°F
83°F to 85°F
83°F to 86°F
83°F to 86°F
85°F to 86°F
83°F to 86°F
83°F to 85°F
83°F to 85°F
81°F to 85°F
83°F to 85°F
Map: other cities in Dominica in september
Cities near Roseau:
| Mahaut in september | tolerable weather |
| Berekua in september | good weather |
| Saint-Joseph (Dominica) in september | good weather |
| Rosalie in september | good weather |
| Castle Bruce in september | tolerable weather |
| Marigot (Dominica) in september | tolerable weather |
| Portsmouth in september | good weather |
| Wesley in september | tolerable weather |
Click over cities on the map for information about the weather in september.
Roseau
perfect weather
good
tolerable
bad
very bad
Weather data for Roseau in september:
Weather data for Roseau for september are derived from an average of the weather forecast since 2009 in Roseau. There is a margin of error and these forecasts are to be considered as general information only. The weather in Roseau 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 Roseau.