Honolulu
September
Weather in Honolulu for September 2025
Your guide to Honolulu weather in September - trends and predictions
In general, the average temperature in Honolulu 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.
Honolulu experiences moderate rainfall in September, with an average of 8 rainy days and a total precipitation of 20.9 mm.
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Temperatures
Rain 🌧️
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22
Dry days
8
Rainy days
0
Snow days
27°/23°
Temperatures
24 km/h
Avg max wind
71 %
Avg humidity
Honolulu in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  27° | 2 27° | 3 27° | 4 27° | 5  27° | 6  27° | 7  27° |
| 8 27° | 9 27° | 10 27° | 11 27° | 12 27° | 13 27° | 14 27° |
| 15 27° | 16 28° | 17 27° | 18 27° | 19 27° | 20 27° | 21 26° |
| 22 26° | 23 26° | 24 26° | 25 27° | 26 27° | 27 27° | 28 27° |
| 29 27° | 30 27° |
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Temperatures trend during September in Honolulu
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 | 27° /23° | 2.9 mm | 6 | |
| Sept. 2 | Patchy rain possible | 27° /23° | 0.3 mm | 6 | |
| Sept. 3 | Patchy rain possible | 27° /23° | 0.4 mm | 6 | |
| Sept. 4 | Patchy rain possible | 27° /23° | 0.4 mm | 6 | |
| Sept. 5 | Partly cloudy | 27° /23° | 0.3 mm | 7 | |
| Sept. 6 | Cloudy | 27° /23° | 0.2 mm | 6 | |
| Sept. 7 | Overcast | 27° /23° | 0.2 mm | 6 | |
| Sept. 8 | Patchy rain possible | 27° /23° | 0.6 mm | 7 | |
| Sept. 9 | Cloudy | 27° /23° | 0.3 mm | 6 | |
| Sept. 10 | Partly cloudy | 27° /23° | 0.2 mm | 7 | |
| Sept. 11 | Patchy rain possible | 27° /23° | 1 mm | 7 | |
| Sept. 12 | Cloudy | 27° /23° | 0.1 mm | 6 | |
| Sept. 13 | Partly cloudy | 27° /24° | 0.3 mm | 7 | |
| Sept. 14 | Partly cloudy | 27° /24° | 0.5 mm | 7 | |
| Sept. 15 | Partly cloudy | 27° /24° | 1 mm | 7 | |
| Sept. 16 | Light rain shower | 28° /24° | 1.3 mm | 6 | |
| Sept. 17 | Cloudy | 27° /23° | 0.6 mm | 6 | |
| Sept. 18 | Patchy rain possible | 27° /24° | 0.9 mm | 6 | |
| Sept. 19 | Patchy rain possible | 27° /23° | 0.5 mm | 6 | |
| Sept. 20 | Patchy rain possible | 27° /23° | 0.5 mm | 6 | |
| Sept. 21 | Patchy rain possible | 26° /23° | 0.9 mm | 6 | |
| Sept. 22 | Patchy rain possible | 26° /23° | 0.5 mm | 6 | |
| Sept. 23 | Light rain shower | 26° /23° | 1.4 mm | 6 | |
| Sept. 24 | Patchy rain possible | 26° /23° | 1 mm | 6 | |
| Sept. 25 | Patchy rain possible | 27° /23° | 0.3 mm | 6 | |
| Sept. 26 | Patchy rain possible | 27° /23° | 0.6 mm | 6 | |
| Sept. 27 | Light rain shower | 27° /23° | 1.3 mm | 6 | |
| Sept. 28 | Patchy rain possible | 27° /23° | 0.5 mm | 6 | |
| Sept. 29 | Patchy rain possible | 27° /23° | 0.5 mm | 6 | |
| Sept. 30 | Patchy rain possible | 27° /23° | 1.4 mm | 6 | |
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Important Notice
Our weather forecast for Honolulu 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 Honolulu forecast closer to your planned date for the most up-to-date weather information.
Honolulu in September - FAQ
What are the expected maximum and minimum temperatures in Honolulu 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 Honolulu during September?
In September, Honolulu can expect light to moderate rainfall, totaling 20.9 mm across approximately 8 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Honolulu during September?
The average wind speed in Honolulu during September is 24 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Honolulu
Explore the daily rainfall trends and prepare for Honolulus September weather 💧
UV exposure in Honolulu during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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