Weather in Long Island, New York for July 2025
Heat Advisory - See hour by hour.
Until now, July 2025 in Long Island has been nearly identical to the historical average, with a temperature of 27.8 °F (showing only a slight deviation of 0.4 °F).
The forecast for the next days in Long Island predicts temperatures to be around 27 °F, close to the historical average.
In general, the average temperature in Long Island at the beginning of July is 27.1 °F. As the month progressed, temperatures tended to slightly decrease, reaching an average of 26.9 °F by the end of July.
Long Island in July brings notable rainfall, with an average of 19 rainy days and a total precipitation of 151.3 mm.
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Long Island Weather July
Temperatures trend during July in Long Island
July weather in Long Island day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Jul. 1 |  Patchy rain possible | 26° /19° | 1.7 mm | 6 | |
| Jul. 2 |  Sunny | 27° /19° | 5.6 mm | 7 | |
| Jul. 3 |  Partly cloudy | 28° /19° | 1.2 mm | 7 | |
| Jul. 4 |  Cloudy | 26° /19° | 9.9 mm | 6 | |
| Jul. 5 |  Moderate or heavy rain shower | 27° /19° | 4.2 mm | 7 | |
| Jul. 6 |  Heavy rain at times | 28° /21° | 0.8 mm | 7 | |
| Jul. 7 | Patchy rain possible | 28° /22° | 0.4 mm | 6 | |
| Jul. 8 | Moderate rain at times | 30° /22° | 2.7 mm | 7 | |
| Jul. 9 | Cloudy | 28° /22° | 4.6 mm | 6 | |
| Jul. 10 | Cloudy | 27° /23° | 5.3 mm | 6 | |
| Jul. 11 |  Overcast | 27° /21° | 6.6 mm | 6 | |
| Jul. 12 | Moderate rain at times | 27° /22° | 1 mm | 6 | |
| Jul. 13 | Moderate or heavy rain shower | 27° /21° | 19.5 mm | 6 | |
| Jul. 14 | Partly cloudy | 27° /21° | 0 mm | 7 | |
| Jul. 15 | Patchy rain possible | 28° /23° | 1.4 mm | 6 | |
| Jul. 16 | Partly cloudy | 31° /23° | 0 mm | 2.5 | |
| Jul. 17 |  Moderate rain | 31° /25° | 10.8 mm | 1.8 | |
| Jul. 18 | Sunny | 30° /24° | 0 mm | 2.4 | |
| Jul. 19 | Sunny | 25° /20° | 0 mm | 2.4 | |
| Jul. 20 | Patchy rain possible | 27° /22° | 1.8 mm | 0.2 | |
| Jul. 21 | Patchy rain possible | 26° /21° | 0.4 mm | 5 | |
| Jul. 22 | Sunny | 25° /19° | 0 mm | 6 | |
| Jul. 23 | Sunny | 23° /18° | 0 mm | 6 | |
| Jul. 24 | Sunny | 25° /19° | 0 mm | 6 | |
| Jul. 25 | Patchy rain possible | 28° /23° | 1.7 mm | 6 | |
| Jul. 26 | Partly cloudy | 29° /23° | 0 mm | 7 | |
| Jul. 27 | Sunny | 27° /20° | 0 mm | 6 | |
| Jul. 28 | Sunny | 25° /20° | 0 mm | 6 | |
| Jul. 29 | Moderate or heavy rain shower | 25° /19° | 17.8 mm | 6 | |
| Jul. 30 | Overcast | 26° /21° | 0 mm | 6 | |
| Jul. 31 | Light rain shower | 28° /23° | 6.8 mm | 6 | |
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Long Island in July - FAQ
July rainfall patterns in Long Island
UV exposure in Long Island during July
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Where is Long Island?Get accurate weather forecasts for Long Island, located at latitude 40.817 and longitude -73.066. Stay updated with localized weather information tailored for Long Island.