National Weather Service Forecast for: Monmouth Junction NJ
Issued by: National Weather Service Philadelphia, PA
Updated: 7:34 am EDT Mar 19, 2026
 
This
Afternoon
This Afternoon: Mostly cloudy, with a high near 51. South wind around 5 mph.
Mostly Cloudy

 Tonight

Tonight: Mostly cloudy, with a low around 32. Southwest wind around 5 mph.
Mostly Cloudy

 Friday

Friday: Mostly sunny, with a high near 61. Light and variable wind becoming south 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Mostly Sunny

 Friday
Night
Friday Night: Rain likely, mainly before 2am. Mostly cloudy, with a low around 45. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Rain Likely

 Saturday

Saturday: A chance of rain before 8am. Mostly sunny, with a high near 64. West wind 5 to 10 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Chance Rain
then Mostly
Sunny
 Saturday
Night
Saturday Night: Mostly cloudy, with a low around 41.
Mostly Cloudy

 Sunday

Sunday: Partly sunny, with a high near 67.
Partly Sunny

 Sunday
Night
Sunday Night: Rain likely, mainly after 2am. Mostly cloudy, with a low around 41. Chance of precipitation is 60%.
Rain Likely

 Monday

Monday: Rain likely, mainly before 8am. Partly sunny, with a high near 52. Chance of precipitation is 60%.
Rain Likely
then Chance
Rain
Hi 51 °F Lo 32 °F Hi 61 °F Lo 45 °F Hi 64 °F Lo 41 °F Hi 67 °F Lo 41 °F Hi 52 °F

 

This Afternoon
 
 Mostly cloudy, with a high near 51. South wind around 5 mph.
Tonight
 
 Mostly cloudy, with a low around 32. Southwest wind around 5 mph.
Friday
 
 Mostly sunny, with a high near 61. Light and variable wind becoming south 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Friday Night
 
 Rain likely, mainly before 2am. Mostly cloudy, with a low around 45. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday
 
 A chance of rain before 8am. Mostly sunny, with a high near 64. West wind 5 to 10 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night
 
 Mostly cloudy, with a low around 41.
Sunday
 
 Partly sunny, with a high near 67.
Sunday Night
 
 Rain likely, mainly after 2am. Mostly cloudy, with a low around 41. Chance of precipitation is 60%.
Monday
 
 Rain likely, mainly before 8am. Partly sunny, with a high near 52. Chance of precipitation is 60%.
Monday Night
 
 Mostly clear, with a low around 26.
Tuesday
 
 Mostly sunny, with a high near 46.
Tuesday Night
 
 Mostly cloudy, with a low around 29.
Wednesday
 
 Partly sunny, with a high near 52.

 

Forecast from NOAA-NWS for Monmouth Junction NJ.