Long Island (NY)
May
Weather in Long Island, New York for May 2026
Your guide to Long Island weather in May - trends and predictions
In general, the average temperature in Long Island at the beginning of May is 17.3 °F. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 20.1 °F by the end of May.
The climate of Long Island in May is notably wet, with an average of 14 rainy days, and a total of 197.7 mm of precipitation.
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Temperatures
Rain 🌧️
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17
Dry days
14
Rainy days
0
Snow days
19°/13°
Temperatures
19 km/h
Avg max wind
80 %
Avg humidity
Long Island Weather May
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Temperatures trend during May in Long Island
See the weather trend as well as the moving average line
May weather in Long Island day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| May 1 |  Cloudy | 16° /9° | 0 mm | 4 | |
| May 2 |  Overcast | 20° /11° | 7.5 mm | 5 | |
| May 3 | Overcast | 19° /12° | 0.5 mm | 4 | |
| May 4 |  Moderate or heavy rain shower | 17° /12° | 9.9 mm | 4 | |
| May 5 | Moderate or heavy rain shower | 16° /12° | 17.4 mm | 4 | |
| May 6 | Moderate or heavy rain shower | 14° /12° | 68.8 mm | 3 | |
| May 7 | Overcast | 19° /11° | 0 mm | 4 | |
| May 8 | Overcast | 21° /11° | 0 mm | 5 | |
| May 9 | Moderate or heavy rain shower | 15° /12° | 19.3 mm | 4 | |
| May 10 | Overcast | 21° /10° | 0.2 mm | 5 | |
| May 11 |  Partly cloudy | 22° /13° | 0 mm | 6 | |
| May 12 | Partly cloudy | 17° /11° | 0 mm | 5 | |
| May 13 |  Patchy rain possible | 18° /12° | 0.7 mm | 4 | |
| May 14 | Moderate or heavy rain shower | 17° /12° | 16.3 mm | 4 | |
| May 15 |  Fog | 17° /13° | 0 mm | 4 | |
| May 16 | Fog | 19° /14° | 0 mm | 4 | |
| May 17 | Mist | 19° /14° | 0 mm | 4 | |
| May 18 | Overcast | 19° /14° | 0 mm | 4 | |
| May 19 |  Sunny | 20° /10° | 0 mm | 6 | |
| May 20 | Sunny | 17° /8° | 0 mm | 5 | |
| May 21 | Sunny | 16° /10° | 5.2 mm | 4 | |
| May 22 | Partly cloudy | 16° /11° | 33.8 mm | 5 | |
| May 23 | Moderate or heavy rain shower | 18° /10° | 4 mm | 4 | |
| May 24 | Overcast | 21° /12° | 0 mm | 5 | |
| May 25 | Partly cloudy | 21° /12° | 0 mm | 6 | |
| May 26 | Moderate rain at times | 21° /13° | 0.5 mm | 5 | |
| May 27 | Moderate or heavy rain shower | 19° /12° | 12.6 mm | 4 | |
| May 28 | Cloudy | 20° /14° | 2.8 mm | 5 | |
| May 29 | Patchy rain possible | 21° /14° | 9.1 mm | 5 | |
| May 30 | Patchy rain possible | 18° /13° | 12.1 mm | 4 | |
| May 31 | Cloudy | 21° /12° | 42.7 mm | 5 | |
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Important Notice
Our weather forecast for Long Island in May is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Long Island forecast closer to your planned date for the most up-to-date weather information.
Change Month
Long Island in May - FAQ
What are the expected maximum and minimum temperatures in Long Island during May?
Enjoy moderate daytime temperatures of up to 19° and cooler nights around 13°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Long Island during May?
Significant rainfall exceeding 197.7 mm is expected in Long Island during May, occurring over more than 14 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Long Island during May?
The average wind speed in Long Island during May is 19 km/h, suggesting breezy to windy conditions, depending on your activities.
May rainfall patterns in Long Island
Explore the daily rainfall trends and prepare for Long Islands May weather 💧
UV exposure in Long Island during May
Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
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