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: Fog 64°F 2025-06-17T08:47:00-04:00 
Today 2025-06-17, Chance Showers. A 40 percent chance of showers, mainly after 5pm. Cloudy, with a high near 72. Southeast wind 3 to 6 mph.
Tonight 2025-06-17, Showers Likely and Patchy Fog. Showers likely before 2am, then showers likely and possibly a thunderstorm between 2am and 5am, then a chance of showers and thunderstorms after 5am. Patchy fog. Otherwise, cloudy, with a low around 66. Southeast wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.Wednesday 2025-06-18, Chance Showers then Showers. A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2pm. High near 84. South wind 3 to 6 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night 2025-06-18, Showers Likely then Slight Chance Showers. Showers likely and possibly a thunderstorm before 8pm, then a slight chance of showers between 8pm and 2am. Mostly cloudy, with a low around 70. Light southwest wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Juneteenth 2025-06-19, Mostly Sunny then Chance T-storms. A 40 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 91. Southwest wind 6 to 13 mph, with gusts as high as 26 mph.
Thursday Night 2025-06-19, Chance T-storms then Mostly Clear. A 30 percent chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 66.
Friday 2025-06-20, Sunny. Sunny, with a high near 86.
Friday Night 2025-06-20, Partly Cloudy. Partly cloudy, 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, Mostly Sunny. Mostly sunny, with a high near 93.
- Sunday Night 2025-06-22, Partly Cloudy. Partly cloudy, with a low around 74.
- Monday 2025-06-23, Sunny. Sunny, with a high near 97.