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Weather in Kauai County for September 2025

Your guide to Kauai County weather in September - trends and predictions

    Temperatures

  • In general, the average temperature in Kauai County at the beginning of September is 26.1 °F. As the month progressed, temperatures tended to slightly decrease, reaching an average of 26 °F by the end of September.

  • Rain 🌧️

  • Kauai County experiences heavy rainfall in September, with over 20 rainy days and an average total precipitation 76.8 mm.

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Average dry days
4
Dry days
Average rainy days
26
Rainy days
Average snowy days
0
Snow days
Average temperatures
26°/24°
Temperatures
Average wind speed
20 km/h
Avg max wind
Average humidity
75 %
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 day by day

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Date Weather Temperatures Rain UV More
Sept. 1 Patchy light drizzle
Patchy light drizzle
26° /24° 2.2 mm 6
Sept. 2 Patchy rain possible
Patchy rain possible
26° /25° 0.7 mm 6
Sept. 3 Patchy rain possible
Patchy rain possible
27° /24° 0.8 mm 6
Sept. 4 Partly cloudy
Partly cloudy
26° /24° 0.3 mm 7
Sept. 5 Patchy rain possible
Patchy rain possible
26° /24° 0.9 mm 6
Sept. 6 Patchy rain possible
Patchy rain possible
26° /24° 0.2 mm 6
Sept. 7 Patchy rain possible
Patchy rain possible
26° /24° 1.4 mm 6
Sept. 8 Patchy rain possible
Patchy rain possible
26° /24° 0.1 mm 6
Sept. 9 Patchy light drizzle
Patchy light drizzle
26° /24° 1.3 mm 6
Sept. 10 Light rain shower
Light rain shower
25° /23° 7.4 mm 6
Sept. 11 Patchy rain possible
Patchy rain possible
26° /24° 0.1 mm 6
Sept. 12 Patchy rain possible
Patchy rain possible
27° /24° 0.2 mm 6
Sept. 13 Patchy rain possible
Patchy rain possible
27° /24° 0.4 mm 6
Sept. 14 Light rain shower
Light rain shower
26° /24° 4.1 mm 6
Sept. 15 Light rain shower
Light rain shower
26° /24° 5 mm 6
Sept. 16 Light rain shower
Light rain shower
27° /24° 3 mm 6
Sept. 17 Patchy rain possible
Patchy rain possible
26° /25° 4.6 mm 6
Sept. 18 Patchy rain possible
Patchy rain possible
26° /24° 8.1 mm 6
Sept. 19 Patchy rain possible
Patchy rain possible
26° /25° 0.8 mm 6
Sept. 20 Patchy rain possible
Patchy rain possible
26° /24° 2 mm 6
Sept. 21 Light rain shower
Light rain shower
26° /24° 3.7 mm 6
Sept. 22 Light rain shower
Light rain shower
26° /24° 6.4 mm 6
Sept. 23 Patchy rain possible
Patchy rain possible
26° /24° 2.4 mm 6
Sept. 24 Patchy rain possible
Patchy rain possible
26° /24° 0.6 mm 6
Sept. 25 Patchy rain possible
Patchy rain possible
26° /24° 1.7 mm 6
Sept. 26 Light rain shower
Light rain shower
26° /24° 2 mm 6
Sept. 27 Patchy rain possible
Patchy rain possible
26° /24° 4 mm 6
Sept. 28 Light rain shower
Light rain shower
26° /24° 7.5 mm 6
Sept. 29 Patchy rain possible
Patchy rain possible
26° /24° 1.1 mm 6
Sept. 30 Patchy light drizzle
Patchy light drizzle
26° /24° 3.9 mm 6
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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.

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?
Moderate rainfall is anticipated in Kauai County during September, with a total of 76.8 mm spread over approximately 26 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Kauai County during September?
The average wind speed in Kauai County during September is 20 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 💧

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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Location coordinates Where is Kauai County?

Get accurate weather forecasts for Kauai County, located at latitude 22.049 and longitude -159.531. Stay updated with localized weather information tailored for Kauai County.

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