Live Weather & Forecast
Weather in Stony Brook
New York, United States · Real-time conditions & 3-day outlook
22°C
Feels like 25°C
72°F / Feels 76°F
Sunny
Stony Brook, New York
🌞 Daytime
Updated: 2026-04-15 09:45
Humidity
61%
Wind
14.4 km/h WSW
Wind Gust
30.2 km/h
Pressure
1014 mb
Visibility
16 km
UV Index
2.1
(Low)
Precipitation
0 mm
Cloud Cover
0%
Dew Point
14.3°C
Wind Degree
242°
Air Quality Index
US EPA: Moderate
UK DEFRA: Low (2)
CO
221.9 μg/m³
NO₂
20.6 μg/m³
O₃
91 μg/m³
SO₂
8.9 μg/m³
PM 2.5
21.1 μg/m³
PM 10
22.4 μg/m³
Today's Hourly Forecast
24-hour breakdown for Stony Brook, New York
12 AM
18°
Clear
1 AM
18°
Patchy rain nearby
2 AM
17°
Clear
3 AM
16°
Clear
4 AM
16°
Clear
5 AM
16°
Clear
6 AM
16°
Clear
7 AM
17°
Sunny
8 AM
18°
Sunny
9 AM
22°
Sunny
10 AM
22°
Sunny
11 AM
23°
Sunny
12 PM
24°
Sunny
1 PM
27°
Sunny
2 PM
28°
Sunny
3 PM
28°
Sunny
4 PM
27°
Sunny
5 PM
25°
Sunny
6 PM
23°
Sunny
7 PM
20°
Sunny
8 PM
18°
Clear
9 PM
17°
Overcast
10 PM
17°
Partly Cloudy
11 PM
17°
Overcast
3-Day Forecast
Daily overview for Stony Brook, New York
Today
Sunny
29°
/
15°
🌧️ 0% chance of rain
💧 Avg. humidity: 69%
💨 Max wind: 23.4 km/h
🌧️ Total precip: 0.06 mm
☀️ UV Index: 1.9
🌅 Sunrise: 06:13 AM
🌇 Sunset: 07:32 PM
🌙 Waning Crescent
🌑 Moon: 8% lit
Thu, Apr 16
Partly Cloudy
24°
/
13°
🌧️ 0% chance of rain
💧 Avg. humidity: 72%
💨 Max wind: 26.3 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.6
🌅 Sunrise: 06:11 AM
🌇 Sunset: 07:33 PM
🌙 Waning Crescent
🌑 Moon: 3% lit
Fri, Apr 17
Patchy rain nearby
21°
/
14°
🌧️ 79% chance of rain
💧 Avg. humidity: 76%
💨 Max wind: 23 km/h
🌧️ Total precip: 4.64 mm
☀️ UV Index: 1.3
🌅 Sunrise: 06:10 AM
🌇 Sunset: 07:35 PM
🌙 New Moon
🌑 Moon: 0% lit
Best Time to Visit Stony Brook
Plan your trip to Stony Brook, 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 Stony Brook?
Current conditions in Stony Brook: Sunny, temperature 22°C, humidity 61%.
What is the best time to visit Stony Brook?
The best time to visit Stony Brook is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Stony Brook?
Stony Brook is located at approximately 40.9° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Stony Brook?
The wettest period in Stony Brook is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Stony Brook?
For visits to Stony Brook during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Stony Brook in?
Stony Brook is located in United States, in the state of New York.
What are the public holidays in Stony Brook in 2026?
View the 2026 public holidays for Stony Brook on our Holidays page.
What are the GPS coordinates used for the weather forecast in Stony Brook?
The weather forecast for Stony Brook uses coordinates 40.9257, -73.1409.