South River, NJ Weather Tomorrow

Find out what tomorrow's weather looks like in South River with a complete 5 day forecast featuring precipitation probability, daily and nightly weather conditions, high and low temperature trends, sunrise and sunset information, sky cover, wind speed, wind direction, and wind chill for the South River area and around Middlesex county, New Jersey.
Updated: Wed Sep 9th 2026 8:15 PM EDT
South River, NJ Weather – 9-9 – Partly Cloudy
87° / 61°
Partly Cloudy
South River could see overcast conditions with daytime highs of 87°F and nighttime lows near 61°F. There's a very small chance of rainfall, only about 10%. Wind will be moderate, blowing around 15mph on average and gusts of 33.1mph at 11 PM. The humidity will be on the higher side, averaging about 70%, the maximum being 66% at 9 PM and 66% being its lowest at 9 PM. Barometric pressure is its highest of 30.04inHg at 9 PM, a lowest point of 29.99inHg at 11 PM with an avg 30.02inHg.
South River, NJ Weather – 9-10 – Overcast
80° / 73°

Weather Tomorrow

Overcast
Skies will be overcast in South River, with a high of 80°F and a low of 73°F. There's a moderate 49% chance of rainfall with an estimated 0.03in. Wind will be moderate, blowing around 15mph on average and gusts of 37.6mph at 2 AM. The humidity will be on the higher side, averaging about 71%, the maximum being 88% at 10 PM and 64% being its lowest at 4 AM. Barometric pressure is its highest of 29.98inHg at 12 AM, a lowest point of 29.83inHg at 6 PM with an avg 29.9inHg.
South River, NJ Weather – 9-11 – Overcast
81° / 69°
Overcast
South River is set for overcast with temperatures peaking at 81°F and dipping to 69°F. There's a moderate 36% chance of rainfall with an estimated 0.03in. Wind will be moderate, blowing around 11mph on average and gusts of 19.1mph at 8 AM. Humidity levels should be comfortable, sitting around 48% on average, the maximum being 82% at 12 AM and 30% being its lowest at 4 PM. Barometric pressure is its highest of 30.06inHg at 11 PM, a lowest point of 29.89inHg at 2 AM with an avg 29.98inHg.
South River, NJ Weather – 9-12 – Overcast
78° / 66°
Overcast
Daytime highs will reach 78°F with lows dropping to 66°F in South River, where it will be overcast. There might be light rainfall having a 23% chance with an estimated 0.01in. Wind will be moderate, blowing around 11mph on average and gusts of 18.3mph at 1 PM. Humidity levels should be comfortable, sitting around 55% on average, the maximum being 80% at 10 PM and 46% being its lowest at 12 AM. Barometric pressure is its highest of 30.15inHg at 11 AM, a lowest point of 30.06inHg at 12 AM with an avg 30.12inHg.
South River, NJ Weather – 9-13 – Light Rain Shower
78° / 69°
Light Rain Shower
Highs will reach 78°F with lows near 69°F in South River, where rain is. The chance of rain is 91% with an estimated 0.81in. Winds will be light at 9mph and gusts of 22.4mph at 8 AM. High humidity with average of 89% is anticipated, the maximum being 96% at 8 AM and 79% being its lowest at 12 AM. Barometric pressure is its highest of 30.14inHg at 12 AM, a lowest point of 29.98inHg at 5 PM with an avg 30.05inHg.
South River, NJ Weather – 9-14 – Overcast
81° / 70°
Overcast
Cloud-filled skies are in the forecast for South River, with a high of 81°F and a low of 70°F. There's a moderate 38% chance of rainfall with an estimated 0.01in. Winds will be light at 8mph and gusts of 13.5mph at 8 PM. The humidity will be on the higher side, averaging about 77%, the maximum being 94% at 2 AM and 61% being its lowest at 5 PM. Barometric pressure is its highest of 30.13inHg at 11 PM, a lowest point of 30.03inHg at 12 AM with an avg 30.08inHg.

Currently

Clear 80°F
30.03 inHg.
Barometer
57%
Humidity
SSW 22.3 mph
Wind
Clear

5 Day Forecast Nearby

More Local Information

Bookmark and Share

Get the LocalConditions.com App on Google Play
Sign up for a membership to go Ad free