New Jersey · NWS PHI office

South Plainfield, NJ weather

It is 36°F and clear at Somerville, Somerset Airport as of Oct 28, 5:05 AM EDT. Overnight: Partly Cloudy, low near 41°F. Forecast from the National Weather Service, issued Oct 28, 4:08 AM EDT.

Updated Oct 28, 5:27 AM EDT (snapshot)

Current conditions

Temperature

36°F

Clear · feels like 33°F

Wind

NW 3 mph

Humidity 100% · dew point 36°F

Pressure · visibility

30.43 inHg

Visibility 10 mi

Observed at Somerville, Somerset Airport (KSMQ), Oct 28, 5:05 AM EDT. Station readings can lag or be missing.

Alerts for this area

No active NWS alerts cover the South Plainfield forecast zone right now.

Around the NWS PHI forecast area

No active alerts in zones served by the PHI office near South Plainfield.

From the alert snapshot of Oct 28, 2026, 5:12 AM EDT. No alerts are active anywhere in New Jersey.

For official warnings, check weather.gov and your local authorities. OpenForecast repeats National Weather Service alerts and may be delayed or incomplete. Follow instructions from emergency officials.

Next 24 hours

Hourly forecast for South Plainfield (local time)
TimeTempForecastPrecip. chanceWind
Wed 7 AM41°FMostly Sunny0% 0 mph
Wed 8 AM42°FMostly Sunny1% 0 mph
Wed 9 AM47°FPartly Sunny2% 0 mph
Wed 10 AM53°FMostly Sunny2% 0 mph
Wed 11 AM56°FMostly Sunny2% 0 mph
Wed 12 PM59°FMostly Sunny2% 0 mph
Wed 1 PM62°FMostly Sunny2% 0 mph
Wed 2 PM63°FPartly Sunny2% 0 mph
Wed 3 PM63°FPartly Sunny2%SE 5 mph
Wed 4 PM64°FMostly Cloudy1%SE 5 mph
Wed 5 PM62°FMostly Cloudy1%SE 5 mph
Wed 6 PM60°FMostly Cloudy1%SE 5 mph
Wed 7 PM58°FMostly Cloudy1% 0 mph
Wed 8 PM54°FMostly Cloudy1% 0 mph
Wed 9 PM52°FMostly Cloudy1% 0 mph
Wed 10 PM51°FPartly Cloudy0% 0 mph
Wed 11 PM50°FMostly Clear0% 0 mph
Thu 12 AM49°FMostly Clear0% 0 mph
Thu 1 AM47°FMostly Clear0% 0 mph
Thu 2 AM47°FMostly Clear0% 0 mph
Thu 3 AM47°FMostly Clear0% 0 mph
Thu 4 AM45°FPartly Cloudy0% 0 mph
Thu 5 AM46°FMostly Clear0% 0 mph
Thu 6 AM45°FSunny1% 0 mph

Hourly values come from the NWS gridded forecast for the 2.5 km grid square that covers the city's center point. Conditions elsewhere in South Plainfield can differ.

7-day forecast

Overnight

Low 41°F

Partly cloudy, with a low around 41. Northeast wind around 0 mph.

Wednesday

High 64°F·Low 45°F

Partly sunny, with a high near 64. East wind 0 to 5 mph.

Wednesday Night: Partly cloudy, with a low around 45. Southeast wind 0 to 5 mph.

Thursday

High 70°F·Low 51°F

Sunny, with a high near 70. Southwest wind 0 to 5 mph.

Thursday Night: Mostly clear, with a low around 51. Southwest wind 0 to 5 mph.

Friday

High 72°F·Low 43°F

Sunny, with a high near 72.

Friday Night: Mostly clear, with a low around 43.

Saturday

High 64°F·Low 42°F

Sunny, with a high near 64.

Saturday Night: Partly cloudy, with a low around 42.

Sunday

High 67°F·Low 48°F

Partly sunny, with a high near 67.

Sunday Night: Mostly cloudy, with a low around 48.

Monday

High 68°F·Low 50°F

A chance of rain showers after 7am. Mostly cloudy, with a high near 68. Chance of precipitation is 30%.

Monday Night: A chance of rain showers. Mostly cloudy, with a low around 50. Chance of precipitation is 30%.

Tuesday

High 67°F

A chance of rain showers. Partly sunny, with a high near 67.

Nearby cities

Larger cities in the area

Other cities in Middlesex County

See every city we cover in New Jersey, or check all active alerts.

About this forecast

Forecast office
South Plainfield is served by the National Weather Service PHI forecast office, forecast zone NJZ012, county zone NJC023.
Location used
The Census Bureau's internal point for South Plainfield (40.5744, -74.4148), in Middlesex County. Population: 25,062 (2024 estimate), number 39 of the 51 New Jersey cities on this site.
Radar
Nearest NWS radar: KDIX. View it on radar.weather.gov.

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Sources

  • Forecast, hourly forecast, observations and alerts: National Weather Service API, api.weather.gov/points/40.5744,-74.4148 (forecast issued Oct 28, 4:08 AM EDT).
  • Official forecast page: forecast.weather.gov.
  • City location and population: U.S. Census Bureau, Vintage 2024 population estimates and 2024 Gazetteer files.
  • Snapshot taken Oct 28, 2026. The NWS and Census Bureau do not endorse OpenForecast.

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