Kauai Island (HI)
September
Weather in Kauai Island, Hawaii for September 2027
Your guide to Kauai Island weather in September - trends and predictions
In general, the average temperature in Kauai Island at the beginning of September is 26 °C. As the month progressed, temperatures tended to slightly decrease, reaching an average of 25.9 °C by the end of September.
Kauai Island experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 155.5 mm.
Is September a good time to visit Kauai Island? check out the best time to travel to Kauai Island page.
✨ Is September a good time to visit Kauai Island? – Ask the AI Weatherman
Temperatures
Rain 🌧️
More
8
Dry days
22
Rainy days
0
Snow days
26°/24°
Temperatures
23 km/h
Avg max wind
76 %
Avg humidity
Kauai Island Weather September
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Temperatures trend during September in Kauai Island
See the weather trend as well as the moving average line
September weather in Kauai Island day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Patchy rain possible | 26° /24° | 2.2 mm | 6 | |
| Sept. 2 |  Light rain | 26° /25° | 3 mm | 6 | |
| Sept. 3 | Patchy rain possible | 26° /24° | 1.5 mm | 5 | |
| Sept. 4 | Patchy rain possible | 26° /24° | 0.6 mm | 6 | |
| Sept. 5 | Light rain | 26° /24° | 2.8 mm | 6 | |
| Sept. 6 | Light rain | 26° /24° | 5.8 mm | 5 | |
| Sept. 7 |  Moderate rain | 26° /24° | 21.7 mm | 5 | |
| Sept. 8 | Patchy rain possible | 26° /25° | 2.1 mm | 6 | |
| Sept. 9 | Light rain | 27° /24° | 4.2 mm | 7 | |
| Sept. 10 | Light rain | 26° /24° | 7 mm | 6 | |
| Sept. 11 | Patchy rain possible | 26° /25° | 0.1 mm | 8 | |
| Sept. 12 | Patchy rain possible | 27° /24° | 0.6 mm | 8 | |
| Sept. 13 | Light rain | 26° /24° | 7.1 mm | 6 | |
| Sept. 14 | Light rain shower | 26° /24° | 1.5 mm | 8 | |
| Sept. 15 | Light rain | 26° /24° | 4.7 mm | 7 | |
| Sept. 16 | Light rain | 26° /24° | 4.3 mm | 5 | |
| Sept. 17 | Light rain | 26° /24° | 9.5 mm | 6 | |
| Sept. 18 | Light rain | 26° /24° | 8.9 mm | 5 | |
| Sept. 19 | Light rain | 26° /25° | 6 mm | 5 | |
| Sept. 20 | Light rain | 26° /25° | 3.6 mm | 5 | |
| Sept. 21 | Light rain | 26° /25° | 3.5 mm | 5 | |
| Sept. 22 | Light rain | 26° /24° | 7 mm | 5 | |
| Sept. 23 | Light rain | 26° /24° | 3.2 mm | 5 | |
| Sept. 24 | Light rain | 26° /24° | 3 mm | 5 | |
| Sept. 25 | Light rain | 25° /24° | 5.4 mm | 5 | |
| Sept. 26 | Light rain | 26° /24° | 3.2 mm | 5 | |
| Sept. 27 | Light rain | 26° /25° | 4.6 mm | 5 | |
| Sept. 28 | Light rain | 26° /25° | 3.9 mm | 5 | |
| Sept. 29 | Light rain | 26° /24° | 6.1 mm | 5 | |
| Sept. 30 | Moderate rain | 26° /24° | 18.1 mm | 5 | |
| Next | |||||
Important Notice
Our weather forecast for Kauai Island in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Kauai Island forecast closer to your planned date for the most up-to-date weather information.
Change Month
Kauai Island in September - FAQ
What are the expected maximum and minimum temperatures in Kauai Island during September?
During September, expect a variety of temperatures with highs around 26° and lows near 24°, suitable for diverse activities and preferences.
How much rainfall should be expected in Kauai Island during September?
Significant rainfall exceeding 155.5 mm is expected in Kauai Island during September, occurring over more than 22 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Kauai Island during September?
The average wind speed in Kauai Island during September is 23 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Kauai Island
Explore the daily rainfall trends and prepare for Kauai Islands September weather 💧
Typically, Kauai Island has 22 rainy days in September with a total of 155.5 mm of rainfall.
UV exposure in Kauai Island during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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