National Weather Service Forecast for: Monmouth Junction NJ
Issued by: National Weather Service Philadelphia, PA
Updated: 4:08 am EDT May 4, 2026
 
This
Afternoon
This Afternoon: Sunny, with a high near 74. Southwest wind around 15 mph.
Sunny

 Tonight

Tonight: Mostly clear, with a low around 55. South wind 5 to 10 mph.
Mostly Clear

 Tuesday

Tuesday: Mostly sunny, with a high near 84. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.
Mostly Sunny

 Tuesday
Night
Tuesday Night: Mostly cloudy, with a low around 60. South wind around 10 mph, with gusts as high as 20 mph.
Mostly Cloudy

 Wednesday

Wednesday: Rain. High near 71. South wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Rain Likely
then Rain

 Wednesday
Night
Wednesday Night: Rain, mainly before 2am. Low around 50. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Rain

 Thursday

Thursday: A chance of rain before 8am, then showers likely, mainly after 2pm. Mostly cloudy, with a high near 62. Chance of precipitation is 60%.
Showers
Likely

 Thursday
Night
Thursday Night: Showers likely, mainly before 8pm. Mostly cloudy, with a low around 43. Chance of precipitation is 60%.
Showers
Likely then
Chance
Showers
 Friday

Friday: Mostly sunny, with a high near 64.
Mostly Sunny
Hi 74 °F Lo 55 °F Hi 84 °F Lo 60 °F Hi 71 °F Lo 50 °F Hi 62 °F Lo 43 °F Hi 64 °F

 

This Afternoon
 
 Sunny, with a high near 74. Southwest wind around 15 mph.
Tonight
 
 Mostly clear, with a low around 55. South wind 5 to 10 mph.
Tuesday
 
 Mostly sunny, with a high near 84. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
 
 Mostly cloudy, with a low around 60. South wind around 10 mph, with gusts as high as 20 mph.
Wednesday
 
 Rain. High near 71. South wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday Night
 
 Rain, mainly before 2am. Low around 50. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday
 
 A chance of rain before 8am, then showers likely, mainly after 2pm. Mostly cloudy, with a high near 62. Chance of precipitation is 60%.
Thursday Night
 
 Showers likely, mainly before 8pm. Mostly cloudy, with a low around 43. Chance of precipitation is 60%.
Friday
 
 Mostly sunny, with a high near 64.
Friday Night
 
 Partly cloudy, with a low around 45.
Saturday
 
 A chance of showers. Mostly sunny, with a high near 67. Chance of precipitation is 30%.
Saturday Night
 
 A chance of showers. Partly cloudy, with a low around 45. Chance of precipitation is 30%.
Sunday
 
 Mostly sunny, with a high near 71.

 

Forecast from NOAA-NWS for Monmouth Junction NJ.