Mountainside
New Jersey, USA
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Mountainside, NJ

January, the same as December, is a wintry winter month in Mountainside, New Jersey, with average temperature fluctuating between 36°F (2.2°C) and 23.9°F (-4.5°C). January is the coldest month, with an average high-temperature of 36°F (2.2°C) and an average low-temperature of 23.9°F (-4.5°C). Weather in January »

February, the last month of the winter, in Mountainside, is another cold month, with average temperature varying between 39.2°F (4°C) and 25.7°F (-3.5°C). In February, the average high-temperature is practically the same as in January - a still cold 39.2°F (4°C). Weather in February »

The first month of the spring, March, is a chilly month in Mountainside, New Jersey, with average temperature varying between 32.9°F (0.5°C) and 47.3°F (8.5°C). In Mountainside, the average high-temperature marginally rises, from a wintry 39.2°F (4°C) in February, to a chilly 47.3°F (8.5°C). Weather in March »

April in Mountainside, New Jersey, is a moderate spring month, with temperature in the range of an average high of 59°F (15°C) and an average low of 43.3°F (6.3°C). In Mountainside, the average high-temperature in April increases, from a frosty 47.3°F (8.5°C) in March, to a moderate 59°F (15°C). Weather in April »

May, the last month of the spring, in Mountainside, is an agreeable month, with average temperature fluctuating between 69.3°F (20.7°C) and 52.9°F (11.6°C). In May, the average high-temperature increases, from a mild 59°F (15°C) in April, to an agreeable 69.3°F (20.7°C). Weather in May »

The first month of the summer, June, is a moderately hot month in Mountainside, New Jersey, with average temperature ranging between max 77.5°F (25.3°C) and min 60.6°F (15.9°C). In Mountainside, the average high-temperature slightly increases, from an agreeable 69.3°F (20.7°C) in May, to a moderately hot 77.5°F (25.3°C). Weather in June »

July, the same as June, is a moderately hot summer month in Mountainside, New Jersey, with average temperature ranging between max 84.2°F (29°C) and min 67.5°F (19.7°C). July is the warmest month, with an average high-temperature of 84.2°F (29°C) and an average low-temperature of 67.5°F (19.7°C). The average heat index in July is estimated at a tropical 92.3°F (33.5°C). Weather in July »

The last month of the summer, August, is also a moderately hot month in Mountainside, New Jersey, with average temperature fluctuating between 82°F (27.8°C) and 66.2°F (19°C). In Mountainside, the average high-temperature in August is essentially the same as in July - a still moderately hot 82°F (27.8°C). Weather in August »

The first month of the autumn, September, is still a warm month in Mountainside, New Jersey, with average temperature ranging between min 59.4°F (15.2°C) and max 75.4°F (24.1°C). In September, the average high-temperature slightly decreases, from a moderately hot 82°F (27.8°C) in August, to a still warm 75.4°F (24.1°C). Weather in September »

October, the same as September, is another comfortable autumn month in Mountainside, New Jersey, with average temperature fluctuating between 49.1°F (9.5°C) and 63.1°F (17.3°C). In Mountainside, New Jersey, the average high-temperature decreases, from a moderately hot 75.4°F (24.1°C) in September, to an enjoyable 63.1°F (17.3°C). Weather in October »

The last month of the autumn, November, is another cool month in Mountainside, New Jersey, with average temperature ranging between min 38.1°F (3.4°C) and max 51.1°F (10.6°C). In Mountainside, the average high-temperature decreases, from an enjoyable 63.1°F (17.3°C) in October, to a cool 51.1°F (10.6°C). Weather in November »

December, the first month of the winter, in Mountainside, is still a cold month, with temperature in the range of an average high of 42.3°F (5.7°C) and an average low of 31.1°F (-0.5°C). In December, the average high-temperature slightly decreases, from a cool 51.1°F (10.6°C) in November, to a cold 42.3°F (5.7°C). Weather in December »

What is the coldest month in Mountainside?

With an average high-temperature of 36°F (2.2°C) and an average low-temperature of 23.9°F (-4.5°C), January is the coldest month in Mountainside.

How much does it rain in Mountainside?

In Mountainside, New Jersey, during the entire year, the rain falls for 160.7 days and collects up to 30.12" (765mm) of precipitation.

When does it snow in Mountainside?

January through May, October through December are months with snowfall in Mountainside.

How many days does it snow in Mountainside?

Throughout the year, in Mountainside, there are 25.4 snowfall days, and 10.31" (262mm) of snow is accumulated.

When is the lowest UV index in Mountainside?

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Mountainside.

What is the most humid month in Mountainside?

February, October and December, with an average relative humidity of 78%, are most humid months.

What is the month with the least sunshine in Mountainside?

With an average of 4.6h of sunshine, February has the least sunshine of the year in Mountainside, New Jersey.

What is the snowiest month in Mountainside?

The month with the most snowfall is March when snow falls for 5 days and typically aggregates up to 3.23" (82mm) of snow.

What is the least humid month in Mountainside?

April and August, with an average relative humidity of 73%, are the least humid months.

When it does not snow in Mountainside?

June through September are months without snowfall in Mountainside, New Jersey.

When are the longest days in Mountainside?

June has the longest days of the year, with an average of 15.1h of daylight.

What is the month with the highest UV index in Mountainside?

June through August, with an average maximum UV index of 6, are months with the highest UV index.

What is the warmest month in Mountainside?

With an average high-temperature of 84.2°F (29°C) and an average low-temperature of 67.5°F (19.7°C), July is the warmest month.

What month has the most sunshine in Mountainside?

The month with the most sunshine in Mountainside, New Jersey, is July, with an average of 10.5h of sunshine.

What is the driest month in Mountainside?

September is the month with the least rainfall in Mountainside. Rain falls for 12.9 days and accumulates 1.69" (43mm) of precipitation.

What is the rainiest month in Mountainside?

December is the month with the most rainfall. Rain falls for 11.5 days and accumulates 3.19" (81mm) of precipitation.

What is the month with the shortest days in Mountainside?

With an average of 9.3h of daylight, December has the shortest days of the year in Mountainside, New Jersey.
Average temperature - Mountainside, NJ
Average humidity - Mountainside, NJ

Months with the highest relative humidity are February, October and December (78%).
Months with the lowest relative humidity are April and August (73%).

Average rainfall - Mountainside, NJ

The wettest month (with the highest rainfall) is December (3.19").
The driest month (with the least rainfall) is September (1.69").

Average rainfall days - Mountainside, NJ

The month with the highest number of rainy days is July (16.5 days).
The month with the least rainy days is January (9.5 days).

Average snowfall - Mountainside, NJ
Average snowfall days - Mountainside, NJ

Months with the highest number of snowfall days are January and February (7.3 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average daylight / Average sunshine - Mountainside, NJ

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.3h).

The month with the most sunshine is July (Average sunshine: 10.5h).
The month with the least sunshine is February (Average sunshine: 4.6h).

Average UV index - Mountainside, NJ