Kauai Weather: September
 |
Average Day Temperature: | 83.2°F |
|
Average Night Temperature: | 78.6°F |
|
Sea Water Temperature: | 83.9°F |
|
Number of Sunny Days: | 2 days |
| Sunshine Hours: | 11.9 - 12.6 hours | |
|
Number of Rainy Days: | 0 days |
| Precipitation Totals: | 0.8 in | |
| detailed information | ||
forecast
| Kauai |
Temperature
| Kauai |
Air Temperature in September, °F
The highest day temperature in September 2026 was 86°F. The lowest night temperature was 74°F. The average values for day and night temperatures during September were 80.6°F и 76.1°F respectivly.
Kauai Water Sea Temperature in September, °F
The average sea surface temperature in September 2026 for Kauai was 83.3°F. The maximum and minimum values were 82.2°F and 83.8°F respectively.
Most of the days in September are gloomy but you can also expect sunny days.
Precipitation Totals in September, in
Precipitation total in September for Kauai is 0.8 in. It makes september one of the least rainy months of the year.
The average wind speed in September is 10.4 mph.
We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Kauai in September is 5.0 hours.
Kauai on the Weather Map
| Boston |  |
+58 |
| Chicago | |
+62 |
| Hawaii |  |
+82 |
| Houston |  |
+86 |
| Las Vegas |  |
+92 |
| Los Angeles | |
+100 |
| Maui |  |
+74 |
| Miami | |
+88 |
| Myrtle Beach | |
+70 |
| New York | |
+62 |
| San Diego | |
+84 |
| San Francisco | |
+66 |
| Santa Monica | |
+94 |
| Sarasota | |
+84 |
| Washington | |
+64 |
| 1500 |  |
82°F | SW 11 mph |
| 1800 | |
78°F | W 9 mph |
| 2100 |  |
78°F | W 9 mph |
| 0000 | |
78°F | W 8 mph |
| 0300 | |
76°F | W 7 mph |
| 0600 |  |
76°F | W 8 mph |
| 0900 |  |
80°F | W 7 mph |
| 1200 | |
82°F | W 9 mph |