Climate and monthly weather forecastMorristown, NJ
Climate and monthly weather forecast
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
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
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.
In Morristown, New Jersey, during the entire year, the rain falls for 164.2 days and collects up to 30.67" (779mm) of precipitation.
Months with snowfall in Morristown, New Jersey, are January through May, October through December.
In Morristown, New Jersey, during the entire year, snow falls for 26 days and aggregates up to 11.61" (295mm) of snow.
The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2.
February and December, with an average relative humidity of 80%, are most humid months.
The month with the least sunshine in Morristown, New Jersey, is February, with an average of 4.6h of sunshine.
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.
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.
April and August, with an average relative humidity of 74%, are the least humid months.
June through September are months without snowfall in Morristown, New Jersey.
With an average of 15h and 6min of daylight, June has the longest days of the year in Morristown, New Jersey.
June through August, with an average maximum UV index of 6, are months with the highest UV index in Morristown, New Jersey.
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.
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.
The month with the most sunshine in Morristown is July, with an average of 10.3h of sunshine.
The month with the least rainfall is September, when the rain falls for 13.5 days and typically collects 1.69" (43mm) of precipitation.
December has the shortest days of the year in Morristown, with an average of 9h and 18min of daylight.
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 in January:
30.07"Hg - Average pressure in February:
30.04"Hg - Average pressure in March:
30.06"Hg - Average pressure in April:
29.98"Hg - Average pressure in May:
30.01"Hg - Average pressure in June:
29.93"Hg
- Average pressure in July:
29.96"Hg - Average pressure in August:
29.99"Hg - Average pressure in September:
30.06"Hg - Average pressure in October:
30.02"Hg - Average pressure in November:
30.11"Hg - Average pressure in December:
30.08"Hg
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 in January:
8.3mph - Average wind speed in February:
8.3mph - Average wind speed in March:
8.5mph - Average wind speed in April:
8.1mph - Average wind speed in May:
6.6mph - Average wind speed in June:
6.2mph
- Average wind speed in July:
5.4mph - Average wind speed in August:
5.3mph - Average wind speed in September:
5.8mph - Average wind speed in October:
7mph - Average wind speed in November:
7.3mph - Average wind speed in December:
7.6mph
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
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 in January:
1.93" - Average rainfall in February:
2.17" - Average rainfall in March:
2.6" - Average rainfall in April:
2.4" - Average rainfall in May:
2.91" - Average rainfall in June:
2.64"
- Average rainfall in July:
3.27" - Average rainfall in August:
2.72" - Average rainfall in September:
1.69" - Average rainfall in October:
2.99" - Average rainfall in November:
2.32" - Average rainfall in December:
3.03"
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 in January:
8.8 days - Average rainfall days in February:
9.8 days - Average rainfall days in March:
12.8 days - Average rainfall days in April:
15.8 days - Average rainfall days in May:
17.3 days - Average rainfall days in June:
17.3 days
- Average rainfall days in July:
17.4 days - Average rainfall days in August:
16.3 days - Average rainfall days in September:
13.5 days - Average rainfall days in October:
14.1 days - Average rainfall days in November:
9.5 days - Average rainfall days in December:
11.6 days
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
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 in January:
7.6 days - Average snowfall days in February:
7.3 days - Average snowfall days in March:
5.5 days - Average snowfall days in April:
0.6 days - Average snowfall days in May:
0.1 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0.1 days - Average snowfall days in November:
0.8 days - Average snowfall days in December:
4 days
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 in January:
9h and 36min - Average daylight in February:
10h and 42min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 18min - Average daylight in May:
14h and 30min - Average daylight in June:
15h and 6min
- Average daylight in July:
14h and 48min - Average daylight in August:
13h and 42min - Average daylight in September:
12h and 30min - Average daylight in October:
11h and 6min - Average daylight in November:
9h and 54min - Average daylight in December:
9h and 18min
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).
- Average sunshine in January:
4h and 54min - Average sunshine in February:
4h and 36min - Average sunshine in March:
6h and 12min - Average sunshine in April:
8h and 6min - Average sunshine in May:
8h and 24min - Average sunshine in June:
9h and 36min
- Average sunshine in July:
10h and 18min - Average sunshine in August:
10h and 6min - Average sunshine in September:
8h and 30min - Average sunshine in October:
5h and 36min - Average sunshine in November:
5h and 24min - Average sunshine in December:
4h and 48min
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 in January:
16.9 days - Average sunshine days in February:
13.5 days - Average sunshine days in March:
13.1 days - Average sunshine days in April:
11.4 days - Average sunshine days in May:
12.1 days - Average sunshine days in June:
10.5 days
- Average sunshine days in July:
11.9 days - Average sunshine days in August:
12.5 days - Average sunshine days in September:
14.2 days - Average sunshine days in October:
15.5 days - Average sunshine days in November:
18.3 days - Average sunshine days in December:
15.6 days
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
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
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
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).
