Dennis Port Weather: September
 |
Average Day Temperature: | 71.5°F |
|
Average Night Temperature: | 65.5°F |
|
Sea Water Temperature: | 71.1°F |
|
Number of Sunny Days: | 13 days |
| Sunshine Hours: | 11.8 - 13.1 hours | |
|
Number of Rainy Days: | 2 days |
| Precipitation Totals: | 0.9 in | |
| detailed information | ||
forecast
| Dennis Port |
Temperature
| Dennis Port |
Air Temperature in September, °F
The highest day temperature in September 2025 was 79°F. The lowest night temperature was 50°F. The average values for day and night temperatures during September were 72.5°F и 64.0°F respectivly.
Dennis Port Water Sea Temperature in September, °F
The average sea surface temperature in September 2025 for Dennis Port was 70.5°F. The maximum and minimum values were 68.4°F and 73.6°F respectively.
Most of the days in September are sunny but you can also expect cloudy and gloomy days.
Precipitation Totals in September, in
Precipitation total in September for Dennis Port is 0.9 in.
The average wind speed in September is 10.9 mph. It makes September one of the most windless months of the year for Dennis Port.
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 Dennis Port in September is 7.4 hours.
Dennis Port on the Weather Map
| Chicago |  |
0 |
| Hawaii |  |
+78 |
| Honolulu | |
+78 |
| Houston | |
+46 |
| Las Vegas |  |
+44 |
| Los Angeles | |
+56 |
| Maui | |
+72 |
| Miami | |
+72 |
| Miami Beach | |
+80 |
| New York | |
+20 |
| San Diego | |
+58 |
| San Francisco | |
+48 |
| Sarasota | |
+64 |
| Tampa | |
+64 |
| Washington | |
+28 |
| 0300 |  |
16°F | SE 20 mph |
| 0600 |  |
14°F | S 12 mph |
| 0900 |  |
18°F | SE 4 mph |
| 1200 |  |
26°F | NE 6 mph |
| 1500 | |
30°F | NE 11 mph |
| 1800 |  |
28°F | NE 8 mph |
| 2100 | |
30°F | NE 6 mph |
| 0000 | |
32°F | NE 5 mph |