Nantucket Weather: September
 |
Average Day Temperature: | 69.0°F |
|
Average Night Temperature: | 67.4°F |
|
Sea Water Temperature: | 70.5°F |
|
Number of Sunny Days: | 11 days |
| Sunshine Hours: | 11.8 - 13.1 hours | |
|
Number of Rainy Days: | 2 days |
| Precipitation Totals: | 0.9 in | |
| detailed information | ||
forecast
| Nantucket |
Temperature
| Nantucket |
Air Temperature in September, °F
The highest day temperature in September 2026 was 83°F. The lowest night temperature was 59°F. The average values for day and night temperatures during September were 69.0°F и 65.0°F respectivly.
Nantucket Water Sea Temperature in September, °F
The average sea surface temperature in September 2026 for Nantucket was 69.7°F. The maximum and minimum values were 60.0°F and 74.8°F respectively.
You can expect various weather conditions during September. Be ready for sunny, cloudy or even gloomy days.
Precipitation Totals in September, in
Precipitation total in September for Nantucket is 0.9 in. It makes september one of the least rainy months of the year.
The average wind speed in September is 14.9 mph. It makes September one of the most windless months of the year for Nantucket.
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 Nantucket in September is 6.8 hours.
Nantucket on the Weather Map
| Boston |  |
+58 |
| Chicago | |
+60 |
| Hawaii |  |
+82 |
| Houston |  |
+84 |
| Las Vegas |  |
+92 |
| Los Angeles | |
+102 |
| Maui |  |
+74 |
| Miami | |
+88 |
| Myrtle Beach | |
+70 |
| New York | |
+62 |
| San Diego | |
+84 |
| San Francisco | |
+66 |
| Santa Monica | |
+94 |
| Sarasota | |
+84 |
| Washington | |
+64 |
| 0000 |  |
60°F | SE 26 mph |
| 0300 | |
56°F | SE 24 mph |
| 0600 | |
54°F | SE 27 mph |
| 0900 |  |
50°F | SE 22 mph |
| 1200 | |
52°F | SE 16 mph |
| 1500 | |
58°F | E 16 mph |
| 1800 | |
60°F | SE 17 mph |
| 2100 | |
60°F | SE 18 mph |