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
06:43
Sunrise
19:01
Sunset
Moon
Waxing Crescent
10:26
Moonrise
20:06
Moonset
Daily Forecast
Today
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
Monday
Tuesday
Wednesday
Air Quality Data Available
Upgrade to access real-time air quality data for South River.
Resources
UV Index
Humidity
Weather in South River tomorrow, September 15, 2026
Conditions in South River on September 15, 2026 favour clear skies, so the day opens with a fine, sunny outlook. Any interruptions to the blue should be brief rather than lasting. Cloud leads the morning, peaking close to 100% near 09:00. Sunshine has little room until later in the day.
The day peaks near 22°C and cools toward 12°C. Moisture in the air spans 57%-92%, with the highest values around 07:00. Winds stay light, near 3.3 km/h by 11:00, so the day feels still more than breezy.
Afternoon conditions open up, holding cloud close to 23% near 12:00. The day finishes on a milder, brighter note. Visibility holds near 16.1 km, though it can fall to 15.4 km. Expect sunrise at 06:44, sunset at 18:59, and 12 hours 15 minutes of sunlight today overall.
Taken together, settled sunshine in South River on September 15, 2026 makes outdoor timing easier, with highs near 22°C.
Frequently asked questions about weather in South River
How warm does it get in South River?
The warmest month in South River is July, with average high temperatures of 31°C. The average temperature during this period is around 26°C.
How cold does it get in South River?
The coldest month in South River is January, with average low temperatures of -2°C. The average temperature during this period is around 1°C.
What is the wettest time of year in South River?
The wettest month in South River is July, with an average of 132mm of precipitation.
What is the driest time of year in South River?
The driest month in South River is November, with an average of 75mm of precipitation.
Explore more weather forecasts
- Sayreville, New Jersey
- New York City, New York
- East Brunswick, New Jersey
- Los Angeles, California
- Old Bridge, New Jersey
- Brooklyn, New York
- South Old Bridge, New Jersey
- Chicago, Illinois
- Sayreville Junction, New Jersey
- Houston, Texas
- Piscataway, New Jersey
- Queens, New York
- Highland Park, New Jersey
- Phoenix, Arizona
- New Brunswick, New Jersey
- Philadelphia, Pennsylvania
