Kauai (Garden Isle) in september: average Weather, Temperature and Climate
Weather in Kauai (Garden Isle) in september 2025
The weather in Kauai (Garden Isle) in the month of september comes from statistical datas on the last years. You can view the weather statistics the entire month, but also by using the tabs for the beginning, the middle and the end of the month.
Average weather throughout september
good weather UV index: 7
Weather at 6am
79°F
Moderate rain at times
46% of time
34%
15%
5%
Weather at 12pm
83°F
Clear/Sunny
43% of time
34%
19%
5%
Weather at 6pm
79°F
Partly Cloudy
43% of time
29%
24%
4%
Weather at 3am
79°F
52%
30%
14%
4%
Evolution of daily average temperature and precipitation in Kauai (Garden Isle) in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Kauai (Garden Isle) in september.
The climate of Kauai (Garden Isle) in september is good
The weather in september in Kauai (Garden Isle) is wet (with 3.3in of rainfall over 4 days). The weather is better from the previous month since in august it receives an average of 4in of precipitation over 5 days.
The climate enjoyable in this city this month. The high seasonal norm is 83°F. In the morning the temperature drops to 79°F. Thus, the mean temperature average in september in Kauai (Garden Isle) is 81°F. Note that seasonal normals in contrast with those observed in Kauai (Garden Isle) in the month of september with a maximum record of 86°F in 2015 and a minimum record of 74°F in 2021. You can plan to have about 0 days with temperatures up to 86°F, or 0 of time.
Day length in Kauai (Garden Isle) in september is 12:16. Sunrise is at 06:24 and sunset is at 18:40.
With a good climate, the month of september is advisable to go in that area in Hawaii.
Seasonal average climate and temperature of Kauai (Garden Isle) in september
Check below seasonal norms These datas are compiled from the weather statements of the past years of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 81°F | ||||
| Highest temperature | 83°F | ||||
| Lowest temperature | 79°F | ||||
| Highest record temperature | 86°F (2015) | ||||
| Lowest record temperature | 74°F (2021) | ||||
| Number of days at +65°F | 30 day(s) (100%) | ||||
| Sea temperature | |||||
| Average sea temperature | 81°F | ||||
| Lowest sea temperature | 79°F | ||||
| Highest sea temperature | 82°F | ||||
| Wind | |||||
| Wind speed | 21km/h | ||||
| Wind temperature | 79°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 3.3in | ||||
| Number of days with rainfall | 4 day(s) (15%) | ||||
| Record daily rainfall | 1in (2016) | ||||
| Other climate data | |||||
| Humidity | 78% | ||||
| Visibility | 9.67km | ||||
| Cloud cover | 38% | ||||
| UV index | 7 | ||||
| Daily sunshine hours | 11 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 06:24 | ||||
| Time of sunset | 18:40 | ||||
| Length of day | 12:16 | ||||
| Our opinion about the weather in september | |||||
| Our opinion at whereandwhen.net | good | ||||
How was the weather last september?
Here is the day by day recorded weather in Kauai (Garden Isle) in september 2024:
77°F to 81°F
77°F to 81°F
77°F to 81°F
76°F to 79°F
76°F to 81°F
77°F to 81°F
77°F to 79°F
76°F to 79°F
76°F to 79°F
76°F to 79°F
76°F to 79°F
77°F to 81°F
77°F to 81°F
77°F to 81°F
77°F to 81°F
77°F to 83°F
79°F to 81°F
77°F to 81°F
77°F to 81°F
77°F to 79°F
76°F to 79°F
76°F to 79°F
76°F to 79°F
76°F to 79°F
77°F to 81°F
77°F to 79°F
76°F to 79°F
76°F to 81°F
76°F to 81°F
76°F to 81°F
Map: other cities in Hawaii in september
Cities near Kauai (Garden Isle):
| Anahola in september | good weather |
| Lihue in september | good weather |
| Kilauea in september | good weather |
| Koloa in september | good weather |
| Kalaheo in september | good weather |
| Waimea in september | perfect weather |
| Kekaha in september | perfect weather |
| Niihau in september | perfect weather |
| Waialua in september | good weather |
| Hale'iwa in september | good weather |
| Waianae in september | perfect weather |
| Schofield Barracks in september | good weather |
Click over cities on the map for information about the weather in september.
Kauai (Garden Isle)
perfect weather
good
tolerable
bad
very bad
Weather data for Kauai (Garden Isle) in september:
Weather data for Kauai (Garden Isle) for september are derived from an average of the weather forecast since 2009 in Kauai (Garden Isle). There is a margin of error and these forecasts are to be considered as general information only. The weather in Kauai (Garden Isle) 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 Kauai (Garden Isle).