I-78 weather conditions near Mountainside, New Jersey
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Seasoned Weather Conditions
Current Weather Conditions
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7 day weather forecast
Current condition: Mostly Cloudy 82°F 2025-06-18T15:45:00-04:00 
This Afternoon 2025-06-18, Showers Likely. Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 84. South wind around 5 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.Tonight 2025-06-18, Showers Likely then Mostly Cloudy. Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 11pm. Mostly cloudy, with a low around 70. Calm wind. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Juneteenth 2025-06-19, Mostly Sunny then Severe Thunderstorms. A chance of showers and thunderstorms between 2pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Some of the storms could be severe. Mostly sunny, with a high near 91. Heat index values as high as 96. Southwest wind 5 to 11 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night 2025-06-19, Severe Thunderstorms then Slight Chance T-storms. Showers and thunderstorms likely, mainly before 11pm. Some of the storms could be severe. Cloudy during the early evening, then gradual clearing, with a low around 66. West wind 8 to 11 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday 2025-06-20, Sunny. Sunny, with a high near 85. West wind around 10 mph.
Friday Night 2025-06-20, Mostly Clear. Mostly clear, with a low around 66.
Saturday 2025-06-21, Mostly Sunny. Mostly sunny, with a high near 89.
Saturday Night 2025-06-21, Mostly Cloudy. Mostly cloudy, with a low around 71.- Sunday 2025-06-22, Partly Sunny. Partly sunny, with a high near 92.
Sunday Night 2025-06-22, Partly Cloudy. Partly cloudy, with a low around 72.- Monday 2025-06-23, Sunny. Sunny, with a high near 96.
- Monday Night 2025-06-23, Mostly Clear. Mostly clear, with a low around 74.
- Tuesday 2025-06-24, Sunny. Sunny, with a high near 97.
- Tuesday Night 2025-06-24, Mostly Clear. Mostly clear, with a low around 76.
- Wednesday 2025-06-25, Sunny. Sunny, with a high near 95.