Climate and monthly weather forecast
New Brunswick, NJ

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An aerial panorama of the city of Brunswick, New Jersey, seen with its deep tree cover, a large river, and bridges over the river
An aerial panorama of the city of Brunswick, New Jersey, seen with its deep tree cover, a large river, and bridges over the river

The climate of New Brunswick

The city of New Brunswick, nestled in New Jersey, USA, experiences a Humid subtropical climate with no dry season, according to the Köppen climate classification. This description refers to the predominant climate experienced by the city.

Over the year, the climate exhibits variations in several parameters. High temperatures fluctuate from a nippy 36.7°F (2.6°C) in January to a summery 84.6°F (29.2°C) in July. The heat mellows down to 82.6°F (28.1°C) in August before the decline resumes, reaching 43°F (6.1°C) by December. Low temperatures echo a similar trend, oscillating from chilly 24.6°F (-4.1°C) in January and peaking at a comfortable 68.2°F (20.1°C) in July, eventually falling back to 31.8°F (-0.1°C) in December.

New Brunswick receives rainfall uniformly throughout the year, with rainfall ranging from a high of 3.27" (83mm) in July to a low of 1.61" (41mm) in September. February, ironically the shortest month, records the highest average number of rainfall days at 14.3 days, while December, on the other hand, records a relatively dry 8.9 days of rain.

One fascinating pattern in the city's annual climate is the conspicuous absence of snowfall from May to October. It is only in the cold months, from November to April, that snowfall graces the city, with January recording the highest snowfall at 3.5" (89mm).

The best time to visit New Brunswick

New Brunswick welcomes its visitors with the best weather between May and August. During these months, temperatures range perfectly between a warm 69.6°F (20.9°C) to 82.6°F (28.1°C) and a comforting low of 53.2°F (11.8°C) to 67.1°F (19.5°C). The sun basks the city for up to 15 hours a day, with maximum sunshine hours of 10.4 in July. Although July also sees the highest rainfall in inches, the regular weather remains favorably warm, making this period ideal for outdoor activities and sightseeing.

The worst time to visit New Brunswick

The months to avoid for a visit to New Brunswick would undoubtedly be January and February. The weather during these months demonstrates a high degree of severity with temperatures stooping to a frigid low between 24.6°F (-4.1°C) to 26.4°F (-3.1°C), the lowest in the year. Snowfall is at its highest with averages of 1.57 and 1.89" (48mm) in January and February, respectively. To top it all, these months have the shortest days with daylight not exceeding 10.7 hours.

Spring weather in New Brunswick

Spring ushers New Brunswick out of the cold spell, with temperatures gradually climbing from 43°F (6.1°C) in March to 69.6°F (20.9°C) in May. Additionally, low temperatures rise from 33.8°F (1°C) to 53.2°F (11.8°C) during this period. Rainfall sees an uptick, with May receiving the maximum rainfall of 2.8" (71mm). In contrast, daylight hours increase steadily from March's 12 hours to May's 14.4 hours, providing more day-time for outdoor explorations.

Summer weather in New Brunswick

Warm temperatures define the summer months in New Brunswick. The high temperature reaches its peak, from 78.3°F (25.7°C) in June, culminating at 84.6°F (29.2°C) in July, before decreasing slightly to 82.6°F (28.1°C) in August. Similarly, the low temperatures hover between 61.9°F (16.6°C) and 68.2°F (20.1°C). In terms of rainfall, July records the highest precipitation at 3.27" (83mm). Despite this, the skies are seldom gloomy, as the city enjoys extended daylight hours and lots of sunshine.

Autumn weather in New Brunswick

Autumn presents a shift in the weather pattern of New Brunswick. Temperatures take a downward slide with highs ranging from 75.9°F (24.4°C) in September to 52°F (11.1°C) in November. In the same period, the nighttime low temperatures descend from 59.9°F (15.5°C) to a chilly 38.3°F (3.5°C). Even as the weather cools, the rainfall decreases as well, and November receives the least rainfall in the month at 2.05" (52mm). Thus, Autumn comes with a calm yet cooling weather transition.

Winter weather in New Brunswick

Winter in New Brunswick is characterized by cold temperatures and snowfall. Highs dwindle between 52°F (11.1°C) and 36.7°F (2.6°C) from December to February, while lows chill at 31.8°F (-0.1°C) to 24.6°F (-4.1°C). Rainfall mildly fluctuates around 2" (51mm), but it’s the increase in snowfall that truly marks winter, with 3.5" (89mm) of snow in January. These months also see the shortest days, with daylight ranging from 9.3 hours to 10.7 hours. However, there's good news for winter enthusiasts, as New Brunswick in winter offers snow-clad landscapes and vibrant holiday festivities.

Weather in January

Despite being the first month of the year, January presents the New Brunswick climate in its coolest splendor. This is defined by temperatures that barely rise above the freezing point coupled with some snowfall. Sunshine dawns on the city for around half the daylight hours offering a welcome respite from the generally cold and cloudy days. Weather in January »

Weather in February

February maintains the cold dominance in New Brunswick's weather exhibited in January with slightly warmed up temperatures but it's rainfall takes a slightly northward turn. The latter has made this month known among locals as a period of greater rainfall, indicating the beginning of earlier spring falls. Weather in February »

Weather in March

Weather conditions in New Brunswick start to shift dramatically in March. Temperatures invariably begin to rise and, despite the increased rainfall, the snowfall virtually comes to a halt by the month's end. Increasing daylight hours reveal the onset of spring and reflect the transition from the colder months of January and February. Weather in March »

Weather in April

With the arrival of April, New Brunswick is replete with warmer temperatures and spring showers. As the city continues to transition into the warmer months, snowfall becomes virtually non-existent. The month provides an extended duration of sunshine, welcoming blooming flora and increased outdoor activities. Weather in April »

Weather in May

May’s arrival in New Brunswick heralds the genuine start of the warmer season. The temperature consistently ascends while rainfall becomes frequent but less intense compared to prior months, reducing the possibility of sudden showers. Weather in May »

Weather in June

June in New Brunswick brings the dawn of the hot summer season. Weather transitions from warm to hot as this month features the second-highest average temperatures of the year. Despite experiencing fewer rainy days than May, the humidity doesn’t decline considerably, creating often muggy conditions. Weather in June »

Weather in July

New Brunswick residents experience the peak of summer heat in July. The hot weather gets more persistent, complemented by clear skies and a high ultraviolet index. While it’s the month with the least percentage of clouds, the humidity remains high making afternoons potentially uncomfortable. Weather in July »

Weather in August

August weather in New Brunswick continues the trail of July, carrying forward the intense heat and maintaining the summer's peak. The city experiences the last month of high temperatures before a shift toward the cooler fall temps of September. Weather in August »

Weather in September

The transition from sultry summers to pleasant falls occurs in September in New Brunswick. While days are warm, nights begin to cool off and the humidity gradually recedes, offering soothing rainfall. This makes it a comfortable month, particularly until it gives way to a chillier October. Weather in September »

Weather in October

October signals the full onset of autumn in New Brunswick, characterized by crisp air and falling leaves. Temperatures begin their steep descent into the cooler side of the yearly temperature spectrum. The city prepares itself for the impending winter as autumn clouds offer picturesque sunset hues. Weather in October »

Weather in November

As the penultimate month, November is engulfed by a chilly ambiance in New Brunswick. Steady temperature drops and overcast skies describe the city's transition into its winter phase. Winter's harbinger, the first snow showers might make their appearance towards the month's end. Weather in November »

Weather in December

December introduces New Brunswick to the chilly winter season and is the month with the shortest days of the year. The temperature continues to drop, and the city gets wrapped in a winter chill. The first substantial snowfall is likely to occur, setting the stage for the city's traditional white holiday season. Weather in December »
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Frequently asked questions

What part of the year is the coldest in New Brunswick?

The coldest temperatures in New Brunswick, New Jersey, occur during January, when averages reach a peak of 36.7°F (2.6°C) and a low of 24.6°F (-4.1°C).

How much does it rain in New Brunswick?

Throughout the year, in New Brunswick, there are 149.4 rainfall days, and 28.43" (722mm) of precipitation is accumulated.

When does it snow in New Brunswick?

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

How many days does it snow in New Brunswick?

In New Brunswick, during the entire year, snow falls for 18.3 days and aggregates up to 8.46" (215mm) of snow.

When is the lowest UV index in New Brunswick?

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

What are the most humid months in New Brunswick?

The months with the highest humidity are February, October and December, with an average relative humidity of 77%.

What is the month with the least sunshine in New Brunswick?

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

When does it snow the most in New Brunswick?

March is the month with the most snowfall in New Brunswick, New Jersey. Snow falls for 3.9 days and accumulates 3.5" (89mm) of snow.

When is Daylight Saving Time (DST) in New Brunswick?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in New Brunswick, New Jersey, 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 in New Brunswick?

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

What is the month with the highest UV index in New Brunswick?

The months with the highest UV index in New Brunswick are May through August, with an average maximum UV index of 6.

When it does not snow in New Brunswick?

June through October are months without snowfall.

When are the longest days in New Brunswick?

The month with the longest days is June, with an average of 15h and 0min of daylight.

What is the warmest month in New Brunswick?

New Brunswick's July weather, marked by an average high temperature of 84.6°F (29.2°C) and an average low temperature of 68.2°F (20.1°C), is the warmest in the year.

What is the wettest month in New Brunswick?

July is the month with the most rainfall. Rain falls for 16.6 days and accumulates 3.27" (83mm) of precipitation.

What month has the most sunshine in New Brunswick?

July has the most sunshine of the year, with an average of 10.4h of sunshine.

What is the driest month in New Brunswick?

The month with the least rainfall in New Brunswick is September, when the rain falls for 12.6 days and typically collects 1.61" (41mm) of precipitation.

What is the month with the shortest days in New Brunswick?

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

Average temperature
New Brunswick, NJ

Average temperature - New Brunswick, NJ

The warmest month (with the highest average high temperature) is July (84.6°F).
The month with the lowest average high temperature is January (36.7°F).

The month with the highest average low temperature is July (68.2°F).
The coldest month (with the lowest average low temperature) is January (24.6°F).

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Average pressure
New Brunswick, NJ

Average pressure - New Brunswick, 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).

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Average wind speed
New Brunswick, NJ

Average wind speed - New Brunswick, NJ

The windiest month (with the highest average wind speed) is March (9.1mph).
The calmest months (with the lowest average wind speed) are July and August (5.9mph).

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Average humidity
New Brunswick, NJ

Average humidity - New Brunswick, NJ

The months with the highest relative humidity are February, October and December (77%).
The months with the lowest relative humidity are April and August (72%).

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Average rainfall
New Brunswick, NJ

Average rainfall - New Brunswick, NJ

The wettest month (with the highest rainfall) is July (3.27").
The driest month (with the least rainfall) is September (1.61").

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Average rainfall days
New Brunswick, NJ

Average rainfall days - New Brunswick, NJ

The month with the highest number of rainy days is July (16.6 days).
The month with the least rainy days is January (7.9 days).

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Average snowfall
New Brunswick, NJ

Average snowfall - New Brunswick, NJ

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

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Average snowfall days
New Brunswick, NJ

Average snowfall days - New Brunswick, NJ

The month with the highest number of snowfall days is January (5.4 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

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Average daylight / Average sunshine
New Brunswick, NJ

Average daylight / Average sunshine - New Brunswick, NJ

The month with the longest days is June (Average daylight: 15h and 0min).
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 24min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

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Average sunshine days
New Brunswick, NJ

Average sunshine days - New Brunswick, NJ

The month with the most sunshine days is November (19.9 days).
The month with the least sunshine days is July (11.1 days).

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Average UV index
New Brunswick, NJ

Average UV index - New Brunswick, NJ

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

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Average visibility
New Brunswick, NJ

Average visibility - New Brunswick, 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).

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New Brunswick, New Jersey, USA

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