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Mountainside NJ Weather - Mostly Cloudy - 68°F
Mostly Cloudy
68°F
Updated 10:45 am
Feels Like 68°F
Humidity 77%
Wind N 5 mph
Barometer  30.01 in
Dew Point 60°F
Mountainside NJ Weather - Mostly Cloudy - 20°C
Mostly Cloudy
20°C
Updated 10:45 am
Feels Like 20°C
Humidity 77%
Wind N 8 km/h
Barometer  101.6 kPa
Dew Point 16°C
Mountainside, NJ Weather and Current Conditionsmountainside nj weather forecast

Mountainside, NJ Weather Forecast

Mountainside New Jersey WeatherMountainside, New Jersey Weather Weather Forecast
14 day API forecast for Mountainside, New Jersey. Note. The 7-day weather forecast for Mountainside, NJ is the most reliable and accurate forecast. This model should only be used as a likely scenario. It is difficult to predict weather more than 7 days in advance.
Mountainside, NJ Weather Forecast Dated: 1045 AM Fri Sep 11 2026
Expect a mild stretch with more clouds than sun and occasional showers over the coming period. generally humid conditions and no major pressure swings will dominate.

Friday, September 11, 2026

Mid-Morning
Mountainside Weather - 2026-09-11 - Morning - Overcast
70°F 21°C
Overcast
Mid-Afternoon
Mountainside Weather - 2026-09-11 - Afternoon - Sunny
86°F 30°C
Sunny
Early-Evening
Mountainside Weather - 2026-09-11 - Evening - Sunny
73°F 23°C
Sunny
Warm and summery near 86°F 30°C, overcast in the morning, becoming sunny through the afternoon and evening, with steady humidity and steady pressure. Winds turning from the NNW to the N at 6 mph 9 km/h.

Saturday, September 12, 2026

Mid-Morning
Mountainside Weather - 2026-09-12 - Morning - Cloudy
68°F 20°C
Cloudy
Mid-Afternoon
Mountainside Weather - 2026-09-12 - Afternoon - Overcast
79°F 26°C
Overcast
Early-Evening
Mountainside Weather - 2026-09-12 - Evening - Scattered Showers
73°F 23°C
Scattered Showers
Comfortable with temperatures reaching 79°F 26°C, scattered downpours possible, with increasing humidity and steady pressure. Winds switching from the E to the S at 5 mph 8 km/h.

Sunday, September 13, 2026

Mid-Morning
Mountainside Weather - 2026-09-13 - Morning - Fog
71°F 22°C
Fog
Mid-Afternoon
Mountainside Weather - 2026-09-13 - Afternoon - Scattered Showers
81°F 27°C
Scattered Showers
Early-Evening
Mountainside Weather - 2026-09-13 - Evening - Cloudy
77°F 25°C
Cloudy
Very warm near 81°F 27°C, though humidity makes it feel like 85°F 29°C, locally heavy downpours at times, with lower humidity and steady pressure.

Monday, September 14, 2026

Mid-Morning
Mountainside Weather - 2026-09-14 - Morning - Sunny
69°F 20°C
Sunny
Mid-Afternoon
Mountainside Weather - 2026-09-14 - Afternoon - Cloudy
79°F 26°C
Cloudy
Early-Evening
Mountainside Weather - 2026-09-14 - Evening - Overcast
69°F 21°C
Overcast
Mild temperatures up to 79°F 26°C, sunny in the morning, becoming overcast through the afternoon and evening, with steady humidity and steady pressure. Winds moving from the NNW to the N at 6 mph 10 km/h.

Tuesday, September 15, 2026

Mid-Morning
Mountainside Weather - 2026-09-15 - Morning - Sunny
63°F 17°C
Sunny
Mid-Afternoon
Mountainside Weather - 2026-09-15 - Afternoon - Sunny
72°F 22°C
Sunny
Early-Evening
Mountainside Weather - 2026-09-15 - Evening - Cloudy
64°F 18°C
Cloudy
Mild with a high of 72°F 22°C, partly cloudy in the morning, sunny in the afternoon, and cloudy this evening, with steady humidity and steady pressure.

Wednesday, September 16, 2026

Mid-Morning
Mountainside Weather - 2026-09-16 - Morning - Sunny
69°F 21°C
Sunny
Mid-Afternoon
Mountainside Weather - 2026-09-16 - Afternoon - Sunny
84°F 29°C
Sunny
Early-Evening
Mountainside Weather - 2026-09-16 - Evening - Sunny
79°F 26°C
Sunny
Very warm near 84°F 29°C, though humidity makes it feel like 87°F 31°C, sunny throughout the day, with steady humidity and barometric pressure falling. Winds out of the SW at 9 mph 14 km/h.

Thursday, September 17, 2026

Mid-Morning
Mountainside Weather - 2026-09-17 - Morning - Scattered Showers
71°F 22°C
Scattered Showers
Mid-Afternoon
Mountainside Weather - 2026-09-17 - Afternoon - Cloudy
86°F 30°C
Cloudy
Early-Evening
Mountainside Weather - 2026-09-17 - Evening - Heavy Rain Showers
78°F 26°C
Heavy Rain Showers
Warm and summery around 86°F 30°C (feels like 91°F 33°C), periods of heavy rain and gusty conditions, with steady humidity and barometric pressure falling. Winds shifting from the SSW to the WSW at 9 mph 14 km/h. Gusts up to 23 mph 37 km/h.

Friday, September 18, 2026

Mid-Morning
Mountainside Weather - 2026-09-18 - Morning - Sunny
61°F 16°C
Sunny
Mid-Afternoon
Mountainside Weather - 2026-09-18 - Afternoon - Partly Cloudy
74°F 23°C
Partly Cloudy
Early-Evening
Mountainside Weather - 2026-09-18 - Evening - Scattered Showers
68°F 20°C
Scattered Showers
Enjoyable around 74°F 23°C, scattered downpours possible, with lower humidity and steady pressure. Winds turning from the NNW to the NE at 6 mph 9 km/h.

Saturday, September 19, 2026

Mid-Morning
Mountainside Weather - 2026-09-19 - Morning - Scattered Showers
61°F 16°C
Scattered Showers
Mid-Afternoon
Mountainside Weather - 2026-09-19 - Afternoon - Cloudy
70°F 21°C
Cloudy
Early-Evening
Mountainside Weather - 2026-09-19 - Evening - Sunny
64°F 18°C
Sunny
Mild temperatures up to 70°F 21°C, locally heavy downpours at times, with steady humidity and steady pressure.

Sunday, September 20, 2026

Mid-Morning
Mountainside Weather - 2026-09-20 - Morning - Partly Cloudy
62°F 17°C
Partly Cloudy
Mid-Afternoon
Mountainside Weather - 2026-09-20 - Afternoon - Overcast
73°F 23°C
Overcast
Early-Evening
Mountainside Weather - 2026-09-20 - Evening - Overcast
66°F 19°C
Overcast
Mild with a high of 73°F 23°C, cloudy in the morning, becoming overcast through the afternoon and evening, with steady humidity and steady pressure.

Monday, September 21, 2026

Mid-Morning
Mountainside Weather - 2026-09-21 - Morning - Overcast
61°F 16°C
Overcast
Mid-Afternoon
Mountainside Weather - 2026-09-21 - Afternoon - Overcast
67°F 20°C
Overcast
Early-Evening
Mountainside Weather - 2026-09-21 - Evening - Overcast
64°F 18°C
Overcast
Comfortable at 67°F 20°C, overcast throughout the day, with steady humidity and steady pressure. Winds switching from the NE to the ENE at 9 mph 14 km/h. Gusts up to 20 mph 32 km/h.

Tuesday, September 22, 2026

Mid-Morning
Mountainside Weather - 2026-09-22 - Morning - Scattered Showers
54°F 12°C
Scattered Showers
Mid-Afternoon
Mountainside Weather - 2026-09-22 - Afternoon - Scattered Showers
56°F 13°C
Scattered Showers
Early-Evening
Mountainside Weather - 2026-09-22 - Evening - Scattered Showers
57°F 14°C
Scattered Showers
Crisp with a high near 56°F 13°C, locally heavy downpours at times, with steady humidity and barometric pressure falling. Winds blowing from the NE at 18 mph 29 km/h. Gusts up to 39 mph 63 km/h.

Wednesday, September 23, 2026

Mid-Morning
Mountainside Weather - 2026-09-23 - Morning - Scattered Showers
55°F 13°C
Scattered Showers
Mid-Afternoon
Mountainside Weather - 2026-09-23 - Afternoon - Sunny
62°F 17°C
Sunny
Early-Evening
Mountainside Weather - 2026-09-23 - Evening - Sunny
60°F 16°C
Sunny
Refreshing around 62°F 17°C, periods of heavy rain and gusty conditions, with lower humidity and barometric pressure rising. Winds swinging from the NNE to the NW at 7 mph 12 km/h.

Thursday, September 24, 2026

Mid-Morning
Mountainside Weather - 2026-09-24 - Morning - Sunny
62°F 17°C
Sunny
Mid-Afternoon
Mountainside Weather - 2026-09-24 - Afternoon - Overcast
77°F 25°C
Overcast
Early-Evening
Mountainside Weather - 2026-09-24 - Evening - Overcast
70°F 21°C
Overcast
Mild temperatures up to 77°F 25°C, sunny in the morning, becoming overcast through the afternoon and evening, with steady humidity and steady pressure. Winds shifting from the SW to the WSW at 6 mph 10 km/h.

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Weather by the Numbers

Fri, 11th
Mountainside NJ Weather - Friday, Sep 11, 2026 - Overcast
Hi: 86°F 30°C
Lo: 66°F 19°C
Sunrise 06:34 AM
Sunset 07:13 PM
Wind NNW 8 mph13 km/h
Dew Point 55°F13°C
uv Index 6
Barometric Pressure 30 in1016 mb
POP 11% *
Humidity 48%
Sat, 12th
Mountainside NJ Weather - Saturday, Sep 12, 2026 - Overcast
Hi: 81°F 27°C
Lo: 61°F 16°C
Sunrise 06:35 AM
Sunset 07:12 PM
Wind SE 7 mph11 km/h
Dew Point 53°F12°C
uv Index 5
Barometric Pressure 30.12 in1020 mb
POP 10% *
Humidity 41%
Sun, 13th
Mountainside NJ Weather - Sunday, Sep 13, 2026 - Patchy Rain Nearby
Hi: 81°F 27°C
Lo: 67°F 19°C
Sunrise 06:36 AM
Sunset 07:10 PM
Wind WNW 1 mph1 km/h
Dew Point 70°F21°C
uv Index 5
Barometric Pressure 30 in1016 mb
POP 29% *
Humidity 89%
Mon, 14th
Mountainside NJ Weather - Monday, Sep 14, 2026 - Sunny
Hi: 79°F 26°C
Lo: 64°F 18°C
Sunrise 06:37 AM
Sunset 07:08 PM
Wind NNW 11 mph17 km/h
Dew Point 51°F10°C
uv Index 6
Barometric Pressure 30.12 in1020 mb
POP 1% *
Humidity 41%
Tue, 15th
Mountainside NJ Weather - Tuesday, Sep 15, 2026 - Overcast
Hi: 74°F 23°C
Lo: 56°F 13°C
Sunrise 06:38 AM
Sunset 07:07 PM
Wind E 4 mph7 km/h
Dew Point 42°F6°C
uv Index 4
Barometric Pressure 30.39 in1029 mb
POP 10% *
Humidity 40%
Wed, 16th
Mountainside NJ Weather - Wednesday, Sep 16, 2026 - Sunny
Hi: 85°F 29°C
Lo: 57°F 14°C
Sunrise 06:39 AM
Sunset 07:05 PM
Wind SW 8 mph13 km/h
Dew Point 63°F17°C
uv Index 7
Barometric Pressure 30.27 in1025 mb
POP 4% *
Humidity 58%
Thu, 17th
Mountainside NJ Weather - Thursday, Sep 17, 2026 - Patchy Rain Nearby
Hi: 86°F 30°C
Lo: 67°F 20°C
Sunrise 06:40 AM
Sunset 07:03 PM
Wind SW 8 mph13 km/h
Dew Point 69°F21°C
uv Index 6
Barometric Pressure 30.06 in1018 mb
POP 13% *
Humidity 68%
Fri, 18th
Mountainside NJ Weather - Friday, Sep 18, 2026 - Sunny
Hi: 74°F 23°C
Lo: 58°F 14°C
Sunrise 06:41 AM
Sunset 07:01 PM
Wind NNW 11 mph18 km/h
Dew Point 53°F12°C
uv Index 6
Barometric Pressure 29.94 in1014 mb
POP 3% *
Humidity 57%
Sat, 19th
Mountainside NJ Weather - Saturday, Sep 19, 2026 - Partly Cloudy
Hi: 71°F 22°C
Lo: 58°F 14°C
Sunrise 06:42 AM
Sunset 07:00 PM
Wind WNW 3 mph5 km/h
Dew Point 52°F11°C
uv Index 5
Barometric Pressure 30.12 in1020 mb
POP 9% *
Humidity 58%
Sun, 20th
Mountainside NJ Weather - Sunday, Sep 20, 2026 - Overcast
Hi: 73°F 23°C
Lo: 56°F 13°C
Sunrise 06:43 AM
Sunset 06:58 PM
Wind NE 5 mph9 km/h
Dew Point 46°F8°C
uv Index 5
Barometric Pressure 30.12 in1020 mb
POP 5% *
Humidity 43%
Mon, 21st
Mountainside NJ Weather - Monday, Sep 21, 2026 - Overcast
Hi: 68°F 20°C
Lo: 57°F 14°C
Sunrise 06:44 AM
Sunset 06:56 PM
Wind ENE 7 mph12 km/h
Dew Point 50°F10°C
uv Index 4
Barometric Pressure 30.15 in1021 mb
POP 13% *
Humidity 54%
Tue, 22nd
Mountainside NJ Weather - Tuesday, Sep 22, 2026 - Patchy Rain Nearby
Hi: 60°F 16°C
Lo: 54°F 12°C
Sunrise 06:45 AM
Sunset 06:55 PM
Wind NE 17 mph27 km/h
Dew Point 54°F12°C
uv Index 3
Barometric Pressure 29.94 in1014 mb
POP 43% *
Humidity 95%
Wed, 23rd
Mountainside NJ Weather - Wednesday, Sep 23, 2026 - Cloudy
Hi: 65°F 18°C
Lo: 55°F 13°C
Sunrise 06:46 AM
Sunset 06:53 PM
Wind ESE 9 mph14 km/h
Dew Point 53°F12°C
uv Index 3
Barometric Pressure 29.85 in1011 mb
POP 28% *
Humidity 88%
Thu, 24th
Mountainside NJ Weather - Thursday, Sep 24, 2026 - Overcast
Hi: 77°F 25°C
Lo: 55°F 13°C
Sunrise 06:47 AM
Sunset 06:51 PM
Wind N 7 mph12 km/h
Dew Point 51°F11°C
uv Index 5
Barometric Pressure 30.09 in1019 mb
POP 3% *
Humidity 47%
* POP = Probability of Precipitation. Data for 12:00 PM.