Nantucket Weather: July
 |
Average Day Temperature: | 72.9°F |
|
Average Night Temperature: | 71.9°F |
|
Sea Water Temperature: | 72.4°F |
|
Number of Sunny Days: | 11 days |
| Sunshine Hours: | 14.4 - 15.1 hours | |
|
Number of Rainy Days: | 2 days |
| Precipitation Totals: | 1.0 in | |
| detailed information | ||
forecast
| Nantucket |
Temperature
| Nantucket |
Air Temperature in July, °F
The highest day temperature in July 2025 was 78°F. The lowest night temperature was 66°F. The average values for day and night temperatures during July were 72.8°F и 71.6°F respectivly.
Nantucket Water Sea Temperature in July, °F
The average sea surface temperature in July 2025 for Nantucket was 70.7°F. The maximum and minimum values were 65.4°F and 75.4°F respectively.
You can expect various weather conditions during July. Be ready for sunny, cloudy or even gloomy days.
Precipitation Totals in July, in
Precipitation total in July for Nantucket is 1.0 in.
The average wind speed in July is 12.8 mph. It makes July the most windless month 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 July is 8.0 hours.
Nantucket 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 |
| 0600 |  |
18°F | S 16 mph |
| 0900 |  |
22°F | S 6 mph |
| 1200 |  |
26°F | NE 4 mph |
| 1500 | |
28°F | NE 9 mph |
| 1800 | |
30°F | NE 8 mph |
| 2100 | |
32°F | N 7 mph |
| 0000 | |
34°F | N 6 mph |
| 0300 | |
36°F | W 5 mph |