Climate and monthly weather forecast
Montclair, NJ

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Weather in January

January, like December, in Montclair, New Jersey, is an icy winter month, with an average temperature fluctuating between 35.2°F (1.8°C) and 23.9°F (-4.5°C). With its high average temperature of 35.2°F (1.8°C) and a low of 23.9°F (-4.5°C), January is regarded as the coldest month. Weather in January »

Weather in February

February, the last month of the winter in Montclair, is also an icy month, with an average temperature varying between 38.8°F (3.8°C) and 25.5°F (-3.6°C). Montclair experiences a transition to a still wintry 38.8°F (3.8°C) in average high-temperatures with the arrival of February, not greatly differing from January's 35.2°F (1.8°C). Weather in February »

Weather in March

The first month of the spring, March, is a frosty month in Montclair, New Jersey, with temperature in the range of an average high of 46.4°F (8°C) and an average low of 32.7°F (0.4°C). The beginning of March signals a minor rise in the average high-temperature, moving from a wintry 38.8°F (3.8°C) in February to a frosty 46.4°F (8°C). Weather in March »

Weather in April

April in Montclair, New Jersey, is a moderate spring month, with an average temperature ranging between max 58.5°F (14.7°C) and min 42.8°F (6°C). With the onset of April, Montclair's average high-temperature sees a rise, moving from March's frosty 46.4°F (8°C) to a mild 58.5°F (14.7°C). Weather in April »

Weather in May

May, the last month of the spring in Montclair, is an agreeable month, with an average temperature varying between 69.3°F (20.7°C) and 52.7°F (11.5°C). As April gives way to May, the average high-temperature displays an increase, moving from a moderate 58.5°F (14.7°C) to an agreeable 69.3°F (20.7°C). Weather in May »

Weather in June

June, the first month of the summer in Montclair, is a warm month, with temperature in the range of an average high of 77.5°F (25.3°C) and an average low of 60.4°F (15.8°C). The onset of June brings a minor temperature shift, with the average high-temperature moving from an agreeable 69.3°F (20.7°C) in May to a moderately hot 77.5°F (25.3°C). Weather in June »

Weather in July

July, the same as June, is a moderately hot summer month in Montclair, New Jersey, with temperature in the range of an average high of 84.2°F (29°C) and an average low of 67.6°F (19.8°C). With its high average temperature of 84.2°F (29°C) and a low of 67.6°F (19.8°C), July is regarded as the warmest month. During July, the heat index is evaluated at a hot 91.4°F (33°C). Weather in July »

Weather in August

The last month of the summer, August, is also a moderately hot month in Montclair, New Jersey, with temperature in the range of an average high of 81.9°F (27.7°C) and an average low of 66.6°F (19.2°C). The average high-temperature is a still warm 81.9°F (27.7°C) in August, hardly different from the 84.2°F (29°C) recorded in July. Weather in August »

Weather in September

The first month of the autumn, September, is still a warm month in Montclair, New Jersey, with temperature in the range of an average high of 75°F (23.9°C) and an average low of 59.4°F (15.2°C). The shift from August to September includes a small decrease in the average high-temperature, from a moderately hot 81.9°F (27.7°C) to a still warm 75°F (23.9°C). Weather in September »

Weather in October

October, like September, in Montclair, New Jersey, is another comfortable autumn month, with an average temperature varying between 49.1°F (9.5°C) and 62.6°F (17°C). The shift from September to October corresponds with a decrease in the average high-temperature, down to an enjoyable 62.6°F (17°C) from a moderately hot 75°F (23.9°C). Weather in October »

Weather in November

The last month of the autumn, November, is another cool month in Montclair, New Jersey, with an average temperature ranging between max 50.7°F (10.4°C) and min 37.9°F (3.3°C). Arrival of November comes with a reduction in the average high-temperature, falling from an enjoyable 62.6°F (17°C) in October to a cool 50.7°F (10.4°C). Weather in November »

Weather in December

The first month of the winter, December, is still a cold month in Montclair, New Jersey, with temperature in the range of an average low of 31.1°F (-0.5°C) and an average high of 41.5°F (5.3°C). The shift to December brings a decrease in the average high-temperature, falling from a fresh 50.7°F (10.4°C) in November to a cold 41.5°F (5.3°C). Weather in December »
Updated: Feb 13, 2024 | Published by: Weather U.S. | About Us / Weather Forecasting / Data Sources

Frequently asked questions

What time of the year is the coldest in Montclair?

In Montclair, January registers the lowest temperatures, averaging 35.2°F (1.8°C) at the peak and 23.9°F (-4.5°C) at the lowest.

What is the driest month in Montclair?

January is the month with the least rainfall. Rain falls for 7.6 days and accumulates 1.38" (35mm) of precipitation.

How many days does it rain in Montclair?

In Montclair, during the entire year, the rain falls for 153.3 days and collects up to 24.92" (633mm) of precipitation.

When does it snow in Montclair?

Months with snowfall are January through April, November and December.

How many days does it snow in Montclair?

Throughout the year, in Montclair, there are 22.1 snowfall days, and 8.9" (226mm) of snow is accumulated.

When is the lowest UV index in Montclair?

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

What is the most humid month in Montclair?

The most humid month is February, with an average relative humidity of 78%.

What is the month with the least sunshine in Montclair?

The month with the least sunshine is February, with an average of 4.7h of sunshine.

What is the snowiest month in Montclair?

March is the month with the most snowfall in Montclair, New Jersey. Snow falls for 4.9 days and accumulates 3.27" (83mm) of snow.

When is Daylight Saving Time (DST) in Montclair?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.

What are the least humid months in Montclair?

The months with the lowest humidity are April and August, with an average relative humidity of 72%.

When it does not snow in Montclair?

May through October are months without snowfall in Montclair.

When are the longest days in Montclair?

The month with the longest days is June, with an average of 15h and 6min of daylight.

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

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

What are the warmest months in Montclair?

The average temperatures in Montclair reach their apex in July, averaging 84.2°F (29°C) at the high end and 67.6°F (19.8°C) at the low end.

What is the rainiest month in Montclair?

July is the month with the most rainfall in Montclair, New Jersey. Rain falls for 17.7 days and accumulates 3.07" (78mm) of precipitation.

What month has the most sunshine in Montclair?

With an average of 10.5h of sunshine, July has the most sunshine of the year.

What is the month with the shortest days in Montclair?

With an average of 9h and 18min of daylight, December has the shortest days of the year in Montclair.

Average temperature
Montclair, NJ

Average temperature - Montclair, NJ

The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (35.2°F).

The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (23.9°F).

Average pressure
Montclair, NJ

Average pressure - Montclair, NJ

The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed
Montclair, NJ

Average wind speed - Montclair, NJ

The windiest months (with the highest average wind speed) are January and March (8.8mph).
The calmest month (with the lowest average wind speed) is July (5.7mph).

Average humidity
Montclair, NJ

Average humidity - Montclair, NJ

The month with the highest relative humidity is February (78%).
The months with the lowest relative humidity are April and August (72%).

Average rainfall
Montclair, NJ

Average rainfall - Montclair, NJ

The wettest month (with the highest rainfall) is July (3.07").
The driest month (with the least rainfall) is January (1.38").

Average rainfall days
Montclair, NJ

Average rainfall days - Montclair, NJ

The month with the highest number of rainy days is July (17.7 days).
The month with the least rainy days is January (7.6 days).

Average snowfall
Montclair, NJ

Average snowfall - Montclair, NJ

The month with the highest snowfall is March (3.27").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days
Montclair, NJ

Average snowfall days - Montclair, NJ

The month with the highest number of snowfall days is February (6.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight / Average sunshine
Montclair, NJ

Average daylight / Average sunshine - Montclair, NJ

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).

Average sunshine days
Montclair, NJ

Average sunshine days - Montclair, NJ

The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is July (10.7 days).

Average UV index
Montclair, NJ

Average UV index - Montclair, NJ

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

Average visibility
Montclair, NJ

Average visibility - Montclair, NJ

The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).

Montclair, New Jersey, USA

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