Live Weather & Forecast
Weather in Mountainside
New Jersey, United States · Real-time conditions & 3-day outlook
5°C
Feels like 2°C
41°F / Feels 36°F
Clear
Mountainside, New Jersey
🌙 Nighttime
Updated: 2026-04-13 00:30
Humidity
87%
Wind
11.9 km/h S
Wind Gust
18.1 km/h
Pressure
1026 mb
Visibility
16 km
UV Index
0
(Low)
Precipitation
0 mm
Cloud Cover
0%
Dew Point
4°C
Wind Degree
189°
Air Quality Index
US EPA: Good
UK DEFRA: Low (1)
CO
163.9 μg/m³
NO₂
8.4 μg/m³
O₃
89 μg/m³
SO₂
4.3 μg/m³
PM 2.5
8.3 μg/m³
PM 10
9.5 μg/m³
Today's Hourly Forecast
24-hour breakdown for Mountainside, New Jersey
12 AM
8°
Clear
1 AM
5°
Clear
2 AM
7°
Clear
3 AM
7°
Clear
4 AM
7°
Clear
5 AM
7°
Clear
6 AM
8°
Clear
7 AM
9°
Cloudy
8 AM
12°
Overcast
9 AM
14°
Cloudy
10 AM
17°
Sunny
11 AM
22°
Sunny
12 PM
26°
Sunny
1 PM
25°
Sunny
2 PM
24°
Partly Cloudy
3 PM
24°
Overcast
4 PM
24°
Sunny
5 PM
23°
Partly Cloudy
6 PM
23°
Overcast
7 PM
21°
Sunny
8 PM
20°
Partly Cloudy
9 PM
19°
Clear
10 PM
18°
Clear
11 PM
18°
Clear
3-Day Forecast
Daily overview for Mountainside, New Jersey
Today
Sunny
30°
/
7°
🌧️ 0% chance of rain
💧 Avg. humidity: 77%
💨 Max wind: 28.1 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.4
🌅 Sunrise: 06:22 AM
🌇 Sunset: 07:35 PM
🌙 Waning Crescent
🌑 Moon: 23% lit
Tue, Apr 14
Patchy rain nearby
29°
/
15°
🌧️ 52% chance of rain
💧 Avg. humidity: 73%
💨 Max wind: 20.5 km/h
🌧️ Total precip: 0.55 mm
☀️ UV Index: 1.8
🌅 Sunrise: 06:20 AM
🌇 Sunset: 07:36 PM
🌙 Waning Crescent
🌑 Moon: 15% lit
Wed, Apr 15
Thundery outbreaks in nearby
33°
/
20°
🌧️ 0% chance of rain
💧 Avg. humidity: 62%
💨 Max wind: 22.7 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 2
🌅 Sunrise: 06:19 AM
🌇 Sunset: 07:37 PM
🌙 Waning Crescent
🌑 Moon: 8% lit
Best Time to Visit Mountainside
Plan your trip to Mountainside, United States around the most favorable weather conditions.
Peak Season
June – September
Warm, dry summers — ideal for outdoor activities.
Shoulder Season
April – May, October
Fewer crowds, moderate prices, mild weather.
Off Season
November – March
Cooler temperatures; some regions may experience rain or snow.
Frequently Asked Questions
What is the current weather in Mountainside?
Current conditions in Mountainside: Clear, temperature 5°C, humidity 87%.
What is the best time to visit Mountainside?
The best time to visit Mountainside is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Mountainside?
Mountainside is located at approximately 40.7° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Mountainside?
The wettest period in Mountainside is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Mountainside?
For visits to Mountainside during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Mountainside in?
Mountainside is located in United States, in the state of New Jersey.
What are the public holidays in Mountainside in 2026?
View the 2026 public holidays for Mountainside on our Holidays page.
What are the GPS coordinates used for the weather forecast in Mountainside?
The weather forecast for Mountainside uses coordinates 40.6723, -74.3574.