Climate and monthly weather forecast
Cedar Knolls, NJ

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Weather in January

January, the same as December, is a wintry winter month in Cedar Knolls, New Jersey, with an average temperature varying between 22.5°F (-5.3°C) and 34.9°F (1.6°C). With average high temperatures of 34.9°F (1.6°C) and lows of 22.5°F (-5.3°C), January is the coldest month. Weather in January »

Weather in February

February, the last month of the winter in Cedar Knolls, is also an icy month, with temperature in the range of an average high of 38.3°F (3.5°C) and an average low of 24.1°F (-4.4°C). With February's arrival, Cedar Knolls's weather records an average high-temperature of a still icy 38.3°F (3.5°C), marking little difference from January's 34.9°F (1.6°C). Weather in February »

Weather in March

The first month of the spring, March, is a chilly month in Cedar Knolls, New Jersey, with temperature in the range of an average low of 31.5°F (-0.3°C) and an average high of 46°F (7.8°C). The shift into March is marked by a modest rise in the average high-temperature, moving from February's wintry 38.3°F (3.5°C) to a frosty 46°F (7.8°C). Weather in March »

Weather in April

April in Cedar Knolls, New Jersey, is a mild spring month, with an average temperature ranging between max 58.3°F (14.6°C) and min 41.7°F (5.4°C). With the transition into April, Cedar Knolls experiences an increase in average high-temperatures, moving up from a chilly 46°F (7.8°C) in March to a mild 58.3°F (14.6°C). Weather in April »

Weather in May

May, the last month of the spring in Cedar Knolls, is a pleasant month, with an average temperature ranging between max 68.9°F (20.5°C) and min 51.3°F (10.7°C). With the onset of May, Cedar Knolls's average high-temperature sees a rise, moving from April's refreshing 58.3°F (14.6°C) to an agreeable 68.9°F (20.5°C). Weather in May »

Weather in June

June, the first month of the summer in Cedar Knolls, is a moderately hot month, with temperature in the range of an average high of 77.4°F (25.2°C) and an average low of 58.8°F (14.9°C). Observing a minor shift, the average high-temperature during June adjusts from May's pleasant 68.9°F (20.5°C) to a moderately hot 77.4°F (25.2°C). Weather in June »

Weather in July

July, the same as June, is a moderately hot summer month in Cedar Knolls, New Jersey, with temperature in the range of an average high of 83.7°F (28.7°C) and an average low of 65.7°F (18.7°C). July is the month when Cedar Knolls's temperatures reach their peak, with averages of 83.7°F (28.7°C) and lows of 65.7°F (18.7°C). The heat index in July is computed to be a tropical 91.4°F (33°C). Weather in July »

Weather in August

August, the last month of the summer in Cedar Knolls, is another warm month, with an average temperature varying between 64°F (17.8°C) and 81.5°F (27.5°C). The average high-temperature during August is a still moderately hot 81.5°F (27.5°C), almost matching the conditions of the preceding month. Weather in August »

Weather in September

September, the first month of the autumn in Cedar Knolls, is also a moderately hot month, with an average temperature varying between 74.5°F (23.6°C) and 57.2°F (14°C). Cedar Knolls's weather subtly changes with the onset of September, barely falling from a warm 81.5°F (27.5°C) in August to a still moderately hot 74.5°F (23.6°C). Weather in September »

Weather in October

October, like September, in Cedar Knolls, New Jersey, is another comfortable autumn month, with an average temperature fluctuating between 47.3°F (8.5°C) and 62.2°F (16.8°C). The start of October comes with a reduction in the average high-temperature, receding from a moderately hot 74.5°F (23.6°C) in September to a comfortable 62.2°F (16.8°C). Weather in October »

Weather in November

The last month of the autumn, November, is also a fresh month in Cedar Knolls, New Jersey, with an average temperature varying between 50.5°F (10.3°C) and 36.5°F (2.5°C). In Cedar Knolls, the average high-temperature in November decreases from an enjoyable 62.2°F (16.8°C) in October to a fresh 50.5°F (10.3°C). Weather in November »

Weather in December

The first month of the winter, December, is also an icy month in Cedar Knolls, New Jersey, with an average temperature ranging between max 40.8°F (4.9°C) and min 29.5°F (-1.4°C). December brings a minor decrease, with the average high-temperature reducing from a cool 50.5°F (10.3°C) in November to an icy 40.8°F (4.9°C). Weather in December »
Updated: Jul 15, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the coldest months?

January stands out as Cedar Knolls's coldest month, with temperatures ranging between an average high of 34.9°F (1.6°C) and a low of 22.5°F (-5.3°C).

What is the driest month?

The months with the least rainfall are January, February and September Rain falls for 8.3 days and accumulates 1.57" (40mm) of rain.

How many days does it rain in Cedar Knolls?

Throughout the year, there are 157.9 rainfall days, and 27.05" (687mm) of precipitation is accumulated.

When does it snow?

Months with snowfall in Cedar Knolls are January through May, November and December.

How much does it snow?

In Cedar Knolls, New Jersey, during the entire year, snow falls for 24 days and aggregates up to 9.72" (247mm) of snow.

When is the lowest UV index?

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

What is the most humid month?

February, October and December, with an average relative humidity of 80%, are most humid months.

What is the month with the least sunshine?

The month with the least sunshine is February, with an average of 4.6h of sunshine.

When does it snow the most in Cedar Knolls?

The month with the most snowfall is March, when snow falls for 5.2 days and typically aggregates up to 3.7" (94mm) of snow.

When is Daylight Saving Time (DST)?

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 is the least humid month?

April is the least humid month, with an average relative humidity of 74%.

When it does not snow?

June through October are months without snowfall.

When are the longest days?

June has the longest days of the year, with an average of 15h and 6min of daylight.

What are the months with the highest UV index?

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

What time of the year is the hottest?

Temperature readings reach their annual highs in July, averaging 83.7°F (28.7°C) and a minimum average of 65.7°F (18.7°C).

What is the rainiest month?

July is the month with the most rainfall. Rain falls for 17.6 days and accumulates 3.19" (81mm) of precipitation.

What month has the most sunshine in Cedar Knolls?

The month with the most sunshine is July, with an average of 10.3h of sunshine.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 9h and 18min of daylight.

Average temperature
Cedar Knolls, NJ

Average temperature - Cedar Knolls, NJ

The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (34.9°F).

The month with the highest average low temperature is July (65.7°F).
The coldest month (with the lowest average low temperature) is January (22.5°F).

Average pressure
Cedar Knolls, NJ

Average pressure - Cedar Knolls, 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
Cedar Knolls, NJ

Average wind speed - Cedar Knolls, NJ

The windiest month (with the highest average wind speed) is March (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).

Average humidity
Cedar Knolls, NJ

Average humidity - Cedar Knolls, NJ

The months with the highest relative humidity are February, October and December (80%).
The month with the lowest relative humidity is April (74%).

Average rainfall
Cedar Knolls, NJ

Average rainfall - Cedar Knolls, NJ

The wettest month (with the highest rainfall) is July (3.19").
The driest months (with the least rainfall) are January, February and September (1.57").

Average rainfall days
Cedar Knolls, NJ

Average rainfall days - Cedar Knolls, NJ

The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is January (8.3 days).

Average snowfall
Cedar Knolls, NJ

Average snowfall - Cedar Knolls, NJ

The month with the highest snowfall is March (3.7").
The months with the least snowfall are June, July, August, September and October (0").

Average snowfall days
Cedar Knolls, NJ

Average snowfall days - Cedar Knolls, NJ

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

Average daylight / Average sunshine
Cedar Knolls, NJ

Average daylight / Average sunshine - Cedar Knolls, 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 18min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

Average sunshine days
Cedar Knolls, NJ

Average sunshine days - Cedar Knolls, NJ

The month with the most sunshine days is November (19 days).
The month with the least sunshine days is July (10.9 days).

Average UV index
Cedar Knolls, NJ

Average UV index - Cedar Knolls, 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 cloud cover
Cedar Knolls, NJ

Average cloud cover - Cedar Knolls, NJ

The months with the most cloud cover are February, March and December (Cloud cover 49).
The months with the least cloud cover are July and August (Cloud cover 34).

Average visibility
Cedar Knolls, NJ

Average visibility - Cedar Knolls, NJ

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

Cedar Knolls, New Jersey, USA

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