Live Weather & Forecast
Weather in Islip
New York, United States · Real-time conditions & 3-day outlook
18°C
Feels like 18°C
65°F / Feels 65°F
Partly cloudy
Islip, New York
🌙 Nighttime
Updated: 2026-04-15 21:15
Humidity
65%
Wind
9 km/h SW
Wind Gust
18.9 km/h
Pressure
1012 mb
Visibility
16 km
UV Index
0
(Low)
Precipitation
0 mm
Cloud Cover
75%
Dew Point
11.6°C
Wind Degree
216°
Air Quality Index
US EPA: Moderate
UK DEFRA: Low (2)
CO
209.9 μg/m³
NO₂
20.6 μg/m³
O₃
79 μg/m³
SO₂
4.5 μg/m³
PM 2.5
16.2 μg/m³
PM 10
18.3 μg/m³
Today's Hourly Forecast
24-hour breakdown for Islip, New York
12 AM
19°
Clear
1 AM
18°
Clear
2 AM
17°
Clear
3 AM
17°
Clear
4 AM
16°
Clear
5 AM
16°
Clear
6 AM
16°
Clear
7 AM
17°
Sunny
8 AM
20°
Sunny
9 AM
21°
Partly Cloudy
10 AM
25°
Sunny
11 AM
27°
Sunny
12 PM
29°
Sunny
1 PM
29°
Sunny
2 PM
29°
Sunny
3 PM
29°
Sunny
4 PM
28°
Sunny
5 PM
26°
Sunny
6 PM
24°
Sunny
7 PM
22°
Sunny
8 PM
20°
Clear
9 PM
18°
Partly cloudy
10 PM
18°
Clear
11 PM
18°
Clear
3-Day Forecast
Daily overview for Islip, New York
Today
Sunny
30°
/
16°
🌧️ 0% chance of rain
💧 Avg. humidity: 69%
💨 Max wind: 17.3 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 2
🌅 Sunrise: 06:14 AM
🌇 Sunset: 07:33 PM
🌙 Waning Crescent
🌑 Moon: 8% lit
Thu, Apr 16
Sunny
31°
/
16°
🌧️ 0% chance of rain
💧 Avg. humidity: 66%
💨 Max wind: 18.7 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.7
🌅 Sunrise: 06:12 AM
🌇 Sunset: 07:34 PM
🌙 Waning Crescent
🌑 Moon: 3% lit
Fri, Apr 17
Thundery outbreaks in nearby
25°
/
13°
🌧️ 0% chance of rain
💧 Avg. humidity: 72%
💨 Max wind: 16.6 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.6
🌅 Sunrise: 06:11 AM
🌇 Sunset: 07:35 PM
🌙 New Moon
🌑 Moon: 0% lit
Best Time to Visit Islip
Plan your trip to Islip, United States around the most favorable weather conditions.
Peak Season
June – September
Warm, dry summers — ideal for outdoor activities.
Shoulder Season
April – May, October
Fewer crowds, moderate prices, mild weather.
Off Season
November – March
Cooler temperatures; some regions may experience rain or snow.
Frequently Asked Questions
What is the current weather in Islip?
Current conditions in Islip: Partly cloudy, temperature 18°C, humidity 65%.
What is the best time to visit Islip?
The best time to visit Islip is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Islip?
Islip is located at approximately 40.7° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Islip?
The wettest period in Islip is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Islip?
For visits to Islip during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Islip in?
Islip is located in United States, in the state of New York.
What are the public holidays in Islip in 2026?
View the 2026 public holidays for Islip on our Holidays page.
What are the GPS coordinates used for the weather forecast in Islip?
The weather forecast for Islip uses coordinates 40.7301, -73.2107.