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Weather in Hawaii for September 2025

Your guide to Hawaii weather in September - trends and predictions
  • In general, the average temperature in Hawaii at the beginning of September is 27 °F. As the month progressed, temperatures tended to slightly decrease, reaching an average of 26.9 °F by the end of September.

  • Expect significant rainfall in Hawaii during September, with an average of 20 rainy days.

  • New! Chat with our AI weatherman - it’s amazing and free.
Average dry days
10
Dry days
Average rainy days
20
Rainy days
Average snowy days
0
Snow days
Average temperatures
27°/23°
Temperatures
Average wind speed
25 km/h
Avg max wind
Average humidity
72 %
Avg humidity

Hawaii in September average weather

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Temperatures trend during September in Hawaii

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 Light rain shower
Light rain shower
27° /23° 2.9 mm 6
Sept. 2 Patchy rain possible
Patchy rain possible
27° /23° 0.3 mm 6
Sept. 3 Patchy rain possible
Patchy rain possible
27° /23° 0.4 mm 6
Sept. 4 Patchy rain possible
Patchy rain possible
27° /23° 0.4 mm 6
Sept. 5 Partly cloudy
Partly cloudy
27° /23° 0.3 mm 7
Sept. 6 Cloudy
Cloudy
27° /23° 0.2 mm 6
Sept. 7 Overcast
Overcast
27° /23° 0.2 mm 6
Sept. 8 Patchy rain possible
Patchy rain possible
27° /23° 0.6 mm 7
Sept. 9 Cloudy
Cloudy
27° /23° 0.3 mm 6
Sept. 10 Partly cloudy
Partly cloudy
27° /23° 0.2 mm 7
Sept. 11 Patchy rain possible
Patchy rain possible
27° /23° 1 mm 7
Sept. 12 Cloudy
Cloudy
27° /23° 0.1 mm 6
Sept. 13 Partly cloudy
Partly cloudy
27° /24° 0.3 mm 7
Sept. 14 Partly cloudy
Partly cloudy
27° /24° 0.5 mm 7
Sept. 15 Partly cloudy
Partly cloudy
27° /24° 1 mm 7
Sept. 16 Light rain shower
Light rain shower
28° /24° 1.3 mm 6
Sept. 17 Cloudy
Cloudy
27° /23° 0.6 mm 6
Sept. 18 Patchy rain possible
Patchy rain possible
27° /24° 0.9 mm 6
Sept. 19 Patchy rain possible
Patchy rain possible
27° /23° 0.5 mm 6
Sept. 20 Patchy rain possible
Patchy rain possible
27° /23° 0.5 mm 6
Sept. 21 Patchy rain possible
Patchy rain possible
26° /23° 0.9 mm 6
Sept. 22 Patchy rain possible
Patchy rain possible
26° /23° 0.5 mm 6
Sept. 23 Light rain shower
Light rain shower
26° /23° 1.4 mm 6
Sept. 24 Patchy rain possible
Patchy rain possible
26° /23° 1 mm 6
Sept. 25 Patchy rain possible
Patchy rain possible
27° /23° 0.3 mm 6
Sept. 26 Patchy rain possible
Patchy rain possible
27° /23° 0.6 mm 6
Sept. 27 Light rain shower
Light rain shower
27° /23° 1.3 mm 6
Sept. 28 Patchy rain possible
Patchy rain possible
27° /23° 0.5 mm 6
Sept. 29 Patchy rain possible
Patchy rain possible
27° /23° 0.5 mm 6
Sept. 30 Patchy rain possible
Patchy rain possible
27° /23° 1.4 mm 6
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Important Notice
Our weather forecast for Hawaii 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 Hawaii forecast closer to your planned date for the most up-to-date weather information.

Hawaii in September - FAQ

What are the expected maximum and minimum temperatures in Hawaii during September?
During September, expect a variety of temperatures with highs around 27° and lows near 23°, suitable for diverse activities and preferences.
How much rainfall should be expected in Hawaii during September?
In September, Hawaii can expect light to moderate rainfall, totaling 22.5 mm across approximately 20 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Hawaii during September?
The average wind speed in Hawaii during September is 25 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Hawaii

Explore the daily rainfall trends and prepare for Hawaiis September weather 💧

UV exposure in Hawaii during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Location coordinates Where is Hawaii?

Get accurate weather forecasts for Hawaii, located at latitude 21.307 and longitude -157.858. Stay updated with localized weather information tailored for Hawaii.

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