Climate and monthly weather forecast
Morristown, NJ

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Downtown Morristown, New Jersey, in a perfect aerial shot of the rest of the city, the green tree cover, and the stunning colorful clear sky above
Downtown Morristown, New Jersey, in a perfect aerial shot of the rest of the city, the green tree cover, and the stunning colorful clear sky above

The climate of Morristown

Categorized by the Köppen climate classification as Cfa, Morristown features a humid subtropical climate with no distinct dry season. Its geographical positioning in the northern hemisphere, specifically in the state of New Jersey, USA, heavily influences these weather characteristics. Year-round, the weather displays variations in multiple parameters, thus offering an engaging combination of seasons.

Average high temperatures in Morristown fluctuate from 35.1°F (1.7°C) in the cooler months to 83.7°F (28.7°C) during the heat of summer. Oppositely, average low temperatures range from 22.5°F (-5.3°C) during winter to a pleasant 65.7°F (18.7°C) in summer. Consistently throughout the year, the relative humidity stays between 74% and 80%. Rainfall has moderate variation with monthly averages from 1.69" (43mm) to 3.27" (83mm).

Morristown displays the vibrancy of all four-seasons. Witness maximum rainfall in July with an average of 3.27" (83mm). On the contrary, September sees the lowest rainfall at 1.69" (43mm). The city also experiences frequent snowfall during colder months, peaking at 3.5" (89mm) in March. Noticeably, an extended duration of daylight is observed in June with approximately 15.1 hours, while December has the shortest daylight hour duration at 9.3 hours.

The best time to visit Morristown

The optimal time to experience Morristown lies between May to October when the city enjoys warmer temperatures, ranging from highs of 69.1°F (20.6°C) to 83.7°F (28.7°C) and lows from 51.4°F (10.8°C) to 65.7°F (18.7°C). These months also present lower wind speeds, averaging from 5.4mph (8.7km/h) to 6.6mph (10.6km/h), creating pleasant conditions for outdoor activities. Notably, from June to August, the city receives more sunshine hours, averaging from 9.6 hours to 10.3 hours.

The worst time to visit Morristown

The months from November to April might be less appealing to visitors due to lower average temperatures that span from highs of 35.1°F (1.7°C) to 58.5°F (14.7°C) and lows ranging between 22.5°F (-5.3°C) to 41.9°F (5.5°C). In addition, this period experiences an increase in average wind speed from 7mph (11.3km/h) to 8.5mph (13.7km/h) and decreased sunshine hours, from 4.8 hours to 8.1 hours. Furthermore, the presence of snowfall, particularly from December to March, might deter some tourists.

Spring weather in Morristown

Encompassing March, April, and May, spring in Morristown presents a gradual increase in temperatures as the season progresses. High temperatures range from 46.4°F (8°C) to 69.1°F (20.6°C), while lows vary from 31.6°F (-0.2°C) to 51.4°F (10.8°C). While the frequency of rainy days is highest in May with 17.3 days, April also presents slightly increased precipitation of 2.4" (61mm).

Summer weather in Morristown

Summer months from June to August offer the warmest temperatures, with average high temperatures peaking at 83.7°F (28.7°C) in July and lows remaining comfy from 59°F (15°C) to 65.7°F (18.7°C). Despite the rise in temperature, relative humidity stays fairly constant at around 77%. This season also presents the highest UV index, 6, necessitating sun protection during extended outdoor exposure.

Autumn weather in Morristown

September through November is the autumn season in Morristown exhibiting moderate temperatures ranging from highs of 74.5°F (23.6°C) to 50.5°F (10.3°C) and lows decreasing from 57.6°F (14.2°C) to 36.5°F (2.5°C). In October, the city witnesses maximum rainfall measuring about 2.99" (76mm). Notably, the average wind speed is slightly increased during these months, between 5.8mph (9.3km/h) and 7.3mph (11.7km/h).

Winter weather in Morristown

Winter sets in December and sustains till February, characterized by average high temperatures dropping from 40.8°F (4.9°C) to 35.1°F (1.7°C) and lows fluctuating between 22.5°F (-5.3°C) to 29.7°F (-1.3°C). December signifies the most snowfall measuring 1.61" (41mm). January sees the highest number of snowfall days at 7.3. The winter season also marks reduced daylight hours, averaging between 9.6 hours and 9.3 hours in December.

Weather in January

Echoes of winter make their presence continually known in Morristown, New Jersey throughout January. The month bears witness to the lowest daylight hours, recording an average of 9.6 hours. Sunshine, in comparison to the scarce daylight hours, offers a limited respite. Weather in January »

Weather in February

February continues to carry on the wintery theme set in January, the mercury failing to climb significantly higher. Wind sometimes picks up pace, making the chilly atmosphere feel even colder. Despite the cold, precipitation often takes the form of rain rather than snow. Weather in February »

Weather in March

March witnesses the beginning of a transitional weather period in Morristown. Humidity levels drop slightly from 80% in February to 76%. With increased sunshine and daylight hours, the city starts bidding farewell to the lengthy winter. Weather in March »

Weather in April

The heart of spring sets in April and retiring is the dread of frosty climate. Introducing perfectly balanced conditions, neither excessively warm or cold, light breezes often grace the city. Sunshine hours continue to increase, inserting more daylight into the day. Weather in April »

Weather in May

In May, the city see further elements of pleasant spring weather. Regular rainfall and an increase in relative humidity from 74% in April to 77% in May promotes lush greeneries. Temperature commences its upward trajectory, indicating the incoming summer heat. Weather in May »

Weather in June

June in Morristown, New Jersey marks the onset of summer with a significant upsurge in temperature. Warm and sunlit days are prominently experienced with an extended-daylight period. By this month, snowfall is a far-off memory, the city inundated with warm breezes. Weather in June »

Weather in July

July is the apex of summer, featuring the hottest temperatures and longest daylight hours. Whilst temperature soars to an average high of 83.7°F (28.7°C), intense sunshine keeps the city sunny and vibrant. Residents prepare with light cotton clothing, sunglasses, and sunscreen to bear the scorching sunny days. Weather in July »

Weather in August

With the persisting summer heat, August continues the warm trend set in July, featuring highs of about 81.9°F (27.7°C). The city remains warmed under clear clouds with generous sunlight. Depicting reduced frequency, rainfall maintains balance, neither creating overly dry nor damp scenarios. Weather in August »

Weather in September

Transitioning into fall, September results in the mercury reading dropping from the summer highs. However, average temperatures still reside on the warmer side. Days continue to be pleasant and sunlit, though the presence of chilly winds signifies the arrival of the fall season. Weather in September »

Weather in October

October firmly roots autumn in Morristown, manifesting notable cooler temperatures. With the deciduous trees changing hues and shedding leaves, a color riot is splashed across the cityscape. Rain falls occasionally, amplifying the woody scent of wet leaves and damp undergrowth. Weather in October »

Weather in November

Winter's arrival is prominent in November with sharp reduction in temperatures stated, from an average high of 62.2°F (16.8°C) in October to 50.5°F (10.3°C) recorded. Morristown sees far more overcast days, with clouds often draping the sky. Weather in November »

Weather in December

Engulfed in the spirit of winter, December can be harsh for a non-winter admirer. A high chance of snowfall and a marked drop in temperature is common, plummeting to an average low of 29.7°F (-1.3°C). Despite being the month with the least daylight hours, numerous lights decorate the cityscape creating a vivid spectacle. Weather in December »
Updated: Feb 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What time of the year is the coldest in Morristown?

Morristown's January weather reaches an average high of 35.1°F (1.7°C) and an average low of 22.5°F (-5.3°C), making it the coldest month.

How many days does it rain in Morristown?

In Morristown, New Jersey, during the entire year, the rain falls for 164.2 days and collects up to 30.67" (779mm) of precipitation.

When does it snow in Morristown?

Months with snowfall in Morristown, New Jersey, are January through May, October through December.

How much does it snow in Morristown?

In Morristown, New Jersey, during the entire year, snow falls for 26 days and aggregates up to 11.61" (295mm) of snow.

What are the months with the lowest UV index in Morristown?

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

What is the most humid month in Morristown?

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

What is the month with the least sunshine in Morristown?

The month with the least sunshine in Morristown, New Jersey, is February, with an average of 4.6h of sunshine.

What is the snowiest month in Morristown?

The month with the most snowfall in Morristown is March, when snow falls for 5.5 days and typically aggregates up to 3.5" (89mm) of snow.

When is Daylight Saving Time (DST) in Morristown?

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 Morristown?

April and August, with an average relative humidity of 74%, are the least humid months.

When it does not snow in Morristown?

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

When are the longest days in Morristown?

With an average of 15h and 6min of daylight, June has the longest days of the year in Morristown, New Jersey.

What are the months with the highest UV index in Morristown?

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

What part of the year is the hottest in Morristown?

July, known for its average high temperature of 83.7°F (28.7°C) and an average low temperature of 65.7°F (18.7°C), is the warmest month.

What is the wettest month in Morristown?

The month with the most rainfall in Morristown, New Jersey, is July, when the rain falls for 17.4 days and typically aggregates up to 3.27" (83mm) of precipitation.

What month has the most sunshine in Morristown?

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

What is the driest month in Morristown?

The month with the least rainfall is September, when the rain falls for 13.5 days and typically collects 1.69" (43mm) of precipitation.

What is the month with the shortest days in Morristown?

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

Average temperature
Morristown, NJ

Average temperature - Morristown, 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 (35.1°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
Morristown, NJ

Average pressure - Morristown, 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
Morristown, NJ

Average wind speed - Morristown, 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
Morristown, NJ

Average humidity - Morristown, NJ

The months with the highest relative humidity are February and December (80%).
The months with the lowest relative humidity are April and August (74%).

Average rainfall
Morristown, NJ

Average rainfall - Morristown, NJ

The wettest month (with the highest rainfall) is July (3.27").
The driest month (with the least rainfall) is September (1.69").

Average rainfall days
Morristown, NJ

Average rainfall days - Morristown, NJ

The month with the highest number of rainy days is July (17.4 days).
The month with the least rainy days is January (8.8 days).

Average snowfall
Morristown, NJ

Average snowfall - Morristown, NJ

The month with the highest snowfall is March (3.5").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days
Morristown, NJ

Average snowfall days - Morristown, NJ

The month with the highest number of snowfall days is January (7.6 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight / Average sunshine
Morristown, NJ

Average daylight / Average sunshine - Morristown, 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
Morristown, NJ

Average sunshine days - Morristown, NJ

The month with the most sunshine days is November (18.3 days).
The month with the least sunshine days is June (10.5 days).

Average UV index
Morristown, NJ

Average UV index - Morristown, 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
Morristown, NJ

Average cloud cover - Morristown, NJ

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

Average visibility
Morristown, NJ

Average visibility - Morristown, 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).

Morristown, New Jersey, USA

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