Kauai County (Kauai Island)
September
Weather in Kauai County, Hawaii for September 2027
Your guide to Kauai County weather in September - trends and predictions
In general, the average temperature in Kauai County 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 County 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 County? check out the best time to travel to Kauai County page.
✨ Is September a good time to visit Kauai County? – 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 County Weather September
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Temperatures trend during September in Kauai County
See the weather trend as well as the moving average line
September weather in Kauai County 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 County 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 County forecast closer to your planned date for the most up-to-date weather information.
Change Month
Kauai County in September - FAQ
What are the expected maximum and minimum temperatures in Kauai County 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 County during September?
Significant rainfall exceeding 155.5 mm is expected in Kauai County 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 County during September?
The average wind speed in Kauai County during September is 23 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Kauai County
Explore the daily rainfall trends and prepare for Kauai Countys September weather 💧
Typically, Kauai County has 22 rainy days in September with a total of 155.5 mm of rainfall.
UV exposure in Kauai County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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