See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
06:41
Sunrise
18:56
Sunset
Moon
Waxing Crescent
11:29
Moonrise
20:28
Moonset
Daily Forecast
Today
Wednesday
Thursday
Friday
Saturday
Sunday
Monday
Tuesday
Wednesday
Thursday
Air Quality Data Available
Upgrade to access real-time air quality data for Uniondale.
Resources
UV Index
Humidity
Weather in Uniondale today, September 15, 2026
Uniondale keeps a mostly sunny profile on September 15, 2026, aside from a cloudier spell around 18:00. Outside that window, bright conditions should still lead the day.
Temperatures climb from an overnight low near 13°C toward a daytime high of about 23°C. Moisture in the air spans 42%-81%, with the highest values around 23:00. A lighter breeze peaks around 16:00 near 3.0 km/h.
Afternoon conditions open up, holding cloud close to 24% near 18:00. The day finishes on a milder, brighter note. Horizontal visibility holds close to 16.1 km. The sun rises at 06:41 and sets at 18:56, for a total of 12 hours 15 minutes of sunlight today.
Taken together, settled sunshine in Uniondale on September 15, 2026 makes outdoor timing easier, with highs near 23°C.
Frequently asked questions about weather in Uniondale
How warm does it get in Uniondale?
The warmest month in Uniondale is July, with average high temperatures of 27°C. The average temperature during this period is around 25°C.
How cold does it get in Uniondale?
The coldest month in Uniondale is January, with average low temperatures of 0°C. The average temperature during this period is around 2°C.
What is the wettest time of year in Uniondale?
The wettest month in Uniondale is December, with an average of 128mm of precipitation.
What is the driest time of year in Uniondale?
The driest month in Uniondale is June, with an average of 78mm of precipitation.
Explore more weather forecasts
- Hempstead, New York
- New York City, New York
- Roosevelt, New York
- Los Angeles, California
- North Merrick, New York
- Brooklyn, New York
- East Meadow, New York
- Chicago, Illinois
- Garden City, New York
- Houston, Texas
- Freeport, New York
- Queens, New York
- West Hempstead, New York
- Phoenix, Arizona
- Baldwin, New York
- Philadelphia, Pennsylvania
