Oahu Weather: September
 |
Average Day Temperature: | 85.9°F |
|
Average Night Temperature: | 77.6°F |
|
Sea Water Temperature: | 83.4°F |
|
Number of Sunny Days: | 6 days |
| Sunshine Hours: | 11.9 - 12.5 hours | |
|
Number of Rainy Days: | 0 days |
| Precipitation Totals: | 0.2 in | |
| detailed information | ||
Temperature
| Oahu |
Air Temperature in September, °F
The highest day temperature in September 2025 was 87°F. The lowest night temperature was 73°F. The average values for day and night temperatures during September were 85.2°F и 75.4°F respectivly.
Oahu Water Sea Temperature in September, °F
The average sea surface temperature in September 2025 for Oahu was 83.2°F. The maximum and minimum values were 82.6°F and 84.0°F respectively.
Most of the days in September are cloudy but you can also expect sunny or gloomy days.
Precipitation Totals in September, in
Precipitation total in September for Oahu is 0.2 in. It makes september the least rainy month of the year.
The average wind speed in September is 10.2 mph. It makes September one of the most windless months of the year for Oahu.
We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Oahu in September is 6.6 hours.
Oahu on the Weather Map
| Chicago |  |
-2 |
| Hawaii | |
+78 |
| Honolulu | |
+78 |
| Houston | |
+44 |
| Las Vegas |  |
+40 |
| Los Angeles | |
+52 |
| Maui | |
+72 |
| Miami | |
+72 |
| Miami Beach |  |
+80 |
| New York | |
+18 |
| San Diego | |
+54 |
| San Francisco | |
+46 |
| Sarasota | |
+62 |
| Tampa | |
+62 |
| Washington | |
+28 |
| 0000 |  |
72°F | W 6 mph |
| 0300 | |
74°F | W 14 mph |
| 0600 |  |
74°F | W 11 mph |
| 0900 | |
78°F | NW 7 mph |
| 1200 |  |
82°F | W 8 mph |
| 1500 | |
80°F | SW 7 mph |
| 1800 | |
76°F | W 8 mph |
| 2100 | |
74°F | W 7 mph |