


NWS Forecast for: Mountainside NJ Issued by: National Weather Service New York, NY Last Update: 3:17 am EDT Jun 21, 2025 | ![]() |
Overnight: Partly cloudy, with a low around 66. Calm wind. Saturday: Mostly sunny, with a high near 89. Calm wind becoming west 5 to 7 mph in the afternoon. Saturday Night: Partly cloudy, with a low around 71. Southwest wind around 6 mph. Sunday: Mostly sunny, with a high near 95. Heat index values as high as 103. West wind 8 to 11 mph, with gusts as high as 21 mph. Sunday Night: Mostly clear, with a low around 77. West wind 6 to 8 mph. Monday: Sunny and hot, with a high near 100. Monday Night: Mostly clear, with a low around 78. Tuesday: Sunny, with a high near 99. Tuesday Night: Partly cloudy, with a low around 77. Wednesday: A 30 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 94. Wednesday Night: A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Thursday: A 40 percent chance of showers and thunderstorms. Partly sunny, with a high near 85. Thursday Night: A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Friday: A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 83. | |
Mountainside NJ 40.69°N 74.37°W (Elev. 417 ft) | |
Visit your local NWS office at: https://www.weather.gov/okx/ |