Climate and monthly weather forecastMahwah, NJ
Climate and monthly weather forecast
The climate of Mahwah
Mahwah, in New Jersey, is characterized by the Koppen Climate Classification Dfa. This designation signifies a humid continental climate with no dry season and hot summers. Mahwah's climatological position exhibits a wide variety of weather parameters throughout the year.On a diurnal basis, temperature highs range from 34.3°F (1.3°C) in the coldest months of January to a very warm 84.2°F (29°C) in the peak of summer in July. Correspondingly, the temperature lows range from a chilly 21.7°F (-5.7°C) in January to a mild 65.3°F (18.5°C) in July. These fluctuating temperatures present a distinct seasonal pattern, showcasing the extreme cold in winter and the intense heat Mahwah experiences in the summer months.
Relative humidity throughout the year varies slightly, from a low of 72% in April to 79% in both February and December, suggesting a highly humid year-round climate. This humidity contributes to the consistent rainfall in Mahwah, shown by the occurrence of rainfall days that number between 7.8 days in January, to a high of 16.6 days in July. The monthly rainfall volume also veers from 1.34" (34mm) in September, climbing up to the maximum of 2.68" (68mm) in December.
Mahwah also experiences some snow during the year. The town sees most prevalent snowfall during the winter months; 2.91" (74mm) fall in February, with snowfall days numbering up to 7.7. However, the snow ceases come May, resuming only in October with a minimal snowfall of 0.28" (7mm). The daylight hours peak at 15.1 hours in June before dipping down to 9.3 hours come December, while sunshine hours are most abundant in July with 10.4 hours but decline to 4.5 hours in February.
The best time to visit Mahwah
For visitors keen to enjoy comfortable temperatures and lower rainfall, the recommended window to visit Mahwah spans from May to June and September to October. During these particular periods, the average high temperature ranges from 58.3°F (14.6°C) to 74.8°F (23.8°C). Additionally, these months register lesser rainfall with an average of 2.32" (59mm) in May, 1.34" (34mm) in September, and 2.48" (63mm) in October.The worst time to visit Mahwah
On the contrary, Mahwah in the winter can be uninviting for travelers who are not fans of the cold. The first three months of the year showcase cold temperatures with highs peaking at 46°F (7.8°C) only in March and lows bottoming out at 21.7°F (-5.7°C) in January. The combination of high rainfall and the frequent snowfall during this period could lead to disrupted travel plans.Spring weather in Mahwah
In Mahwah, springtime extends from March to May. During this period, temperatures see a gradual climb with highs starting at 46°F (7.8°C) in March, and reaching 69.6°F (20.9°C) in May. Simultaneously, the lows rise from a cool 30.7°F (-0.7°C) in March up to a mild 50.7°F (10.4°C) in May. Rainfall is reasonably consistent, varying narrowly from 2.05" (52mm) in March to 2.32" (59mm) in May. Coupled with steadily increasing daylight hours from 12 hours in March to 14.5 hours in May, spring in Mahwah is a season of warming temperatures and consistent rainfall.Summer weather in Mahwah
Summer in Mahwah is characterized by both warmth and humidity. Between June and August, high temperatures are consistently above 77.5°F (25.3°C) with the peak of 84.2°F (29°C) reached in July. Correspondingly, low temperatures sit comfortably above 57.9°F (14.4°C). Although heavy showers are not uncommon during the summer months, June experiences the highest volume of rainfall at 2.4" (61mm).Autumn weather in Mahwah
Autumn in Mahwah is from September to November. During this period, temperatures fall gradually sending highs from a warm 74.8°F (23.8°C) in September to an average 50°F (10°C) in November. Over the same period, lows drop from a mild 56.8°F (13.8°C) to a cooler 36.1°F (2.3°C). September registers the lowest rainfall volume of the year at 1.34" (34mm), which then increases to 2.48" (63mm) in October and 1.93" (49mm) in November.Winter weather in Mahwah
Winter in Mahwah is characterized by cold temperatures and snowfall. Between December and February, average high temperatures range from 34.3°F (1.3°C) to 37.8°F (3.2°C) whereas low temperatures lie between 21.7°F (-5.7°C) and 23.4°F (-4.8°C). Entailing precipitation, December has the highest rainfall volume of 2.68" (68mm) while February sees the most snowfall at 2.91" (74mm).Weather in January
Turning the leaf to a new year in Mahwah, the weather takes on a rather frigid demeanor. The comparatively modest sunlight from 5 hours per day does little to alleviate the coldest average temperature of 21.7°F (-5.7°C) and high of 34.3°F (1.3°C). Weather in January »Weather in February
As the calendar transcends into February, Mahwah doesn’t experience significant weather changes. The temperatures slightly rise, making the cold slightly more bearable but by no means warm. However, the notable feature is an increase in snowfall with an accumulation of about 2.91" (74mm). Weather in February »Weather in March
March marks the advent of spring in Mahwah, characterized by a dramatic increase in daily sunshine to 6.1 hours. Temperatures start to move away from the harsh winter cold, although layers are still necessary. More rainfall graces Mahwah in this month, creating slick conditions for residents. Weather in March »Weather in April
April in Mahwah sees a unmistakable leap in warmer weather. There is an expansion in daylight and sunshine hours, influencing the significant rise in temperature. Along with this, the city encounters even more rainfall than in March. Weather in April »Weather in May
May carries the full-fledged vibes of Spring to Mahwah with higher temperatures and increased daylight. The city warms up and receives more sunshine at an average of 8.4 hours a day. This month cannot lay claim to any firm weather extremes. Weather in May »Weather in June
June introduces the summer season to Mahwah with long days and warm temperatures. Residents enjoy the longest daylight hours of the year contributing to generally pleasant conditions. However, June can also deliver high humidity levels, creating a muggy atmosphere. Weather in June »Weather in July
July in Mahwah constitutes the height of summer, featuring the warmest temperatures alongside an abundant sunshine duration of 10.4 hours a day. These conditions contribute to making it one of the more agreeable months for outdoor activities. Weather in July »Weather in August
As summer peaks, August in Mahwah embraces slightly lower temperatures than the preceding month but remains relatively high. This time of the year highlights clear, sunny days which promote a variety of outdoor pastimes. In comparison to July, this month sees a reduction in rainfall, with a total of 1.97" (50mm) spread over fifteen days, making it slightly drier. The commencement of August in Mahwah introduces an average high-temperature of a still warm 82.4°F (28°C), closely mirroring the preceding month. Weather in August »Weather in September
September signals the arrival of fall in Mahwah, with a gradual deduction in temperature and daylight. The city witnesses a significant reduction in rainfall down to 1.34" (34mm), marking the driest month of the year. Alongside this, dwindling daylight hours and cooling temperatures constitute a serene transition from summer to autumn. With the arrival of September, Mahwah experiences a modest decline in average high-temperatures, transitioning from 82.4°F (28°C) in August to a still warm 74.8°F (23.8°C). Weather in September »Weather in October
In October, Mahwah revels in profound autumn tones accompanied by a further decrease in temperature. With winter approaching, the city experiences noticeable weather shifts, including increased rainfall compared to September. October presents an upshot in rainfall to 2.48" (63mm) spread over close to twelve days, setting the stage for the oncoming colder months. October ushers in a slight temperature change, with average high-temperatures reducing from September's moderately hot 74.8°F (23.8°C) to an enjoyable 62.2°F (16.8°C). Weather in October »Weather in November
November in Mahwah welcomes a swift descent into winter temperatures, though they remain tolerable. The daylight hours decrease, and the occurrence of clouds increases, offering a mix of weather conditions. The city is highlighted by rainfall that partially turns into snowfall towards the end of the month. Weather in November »Weather in December
As Mahwah steps into December, it gets enveloped in the encompassing cold of the winter season. With falling temperatures comes an increased likelihood of snowfall with an approximate accumulation of 1.81" (46mm) across 5.1 days. Weather in December »Updated: Jun 19, 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
January, recording an average high temperature of 34.3°F (1.3°C) and a low temperature of 21.7°F (-5.7°C), is Mahwah's coldest month.
Throughout the year, there are 150.6 rainfall days, and 25.12" (638mm) of precipitation is accumulated.
Months with snowfall are January through May, October through December.
In Mahwah, during the entire year, snow falls for 28.5 days and aggregates up to 10.98" (279mm) of snow.
January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Mahwah, New Jersey.
February and December, with an average relative humidity of 79%, are most humid months.
The month with the most snowfall in Mahwah is February, when snow falls for 7.7 days and typically aggregates up to 2.91" (74mm) of snow.
February has the least sunshine of the year, with an average of 4.5h of sunshine.
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 is the least humid month, with an average relative humidity of 72%.
In Mahwah, snow does not fall in June through September.
With an average of 15h and 6min of daylight, June has the longest days of the year.
The months with the highest UV index in Mahwah, New Jersey, are June through August, with an average maximum UV index of 6.
Mahwah's temperatures peak on average in July, reaching 84.2°F (29°C) at their highest and 65.3°F (18.5°C) at their lowest.
The month with the most sunshine is July, with an average of 10.4h of sunshine.
The month with the least rainfall is September, when the rain falls for 11 days and typically collects 1.34" (34mm) of precipitation.
The month with the most rainfall is December, when the rain falls for 10.8 days and typically aggregates up to 2.68" (68mm) of precipitation.
With an average of 9h and 18min of daylight, December has the shortest days of the year.
Average temperature
Mahwah, 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 (34.3°F).
The month with the highest average low temperature is July (65.3°F).
The coldest month (with the lowest average low temperature) is January (21.7°F).
Average pressure
Mahwah, NJ
- Average pressure in January:
30.06"Hg - Average pressure in February:
30.03"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:
29.98"Hg - Average pressure in September:
30.06"Hg - Average pressure in October:
30.02"Hg - Average pressure in November:
30.1"Hg - Average pressure in December:
30.07"Hg
The month with the highest atmospheric pressure is November (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed
Mahwah, NJ
- Average wind speed in January:
7.6mph - Average wind speed in February:
7.6mph - Average wind speed in March:
7.7mph - Average wind speed in April:
7.4mph - Average wind speed in May:
6.1mph - Average wind speed in June:
5.7mph
- Average wind speed in July:
5.1mph - Average wind speed in August:
5mph - Average wind speed in September:
5.5mph - Average wind speed in October:
6.5mph - Average wind speed in November:
6.8mph - Average wind speed in December:
7.1mph
The windiest month (with the highest average wind speed) is March (7.7mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity
Mahwah, NJ
The months with the highest relative humidity are February and December (79%).
The month with the lowest relative humidity is April (72%).
Average rainfall
Mahwah, NJ
- Average rainfall in January:
1.61" - Average rainfall in February:
1.65" - Average rainfall in March:
2.05" - Average rainfall in April:
2.09" - Average rainfall in May:
2.32" - Average rainfall in June:
2.4"
- Average rainfall in July:
2.6" - Average rainfall in August:
1.97" - Average rainfall in September:
1.34" - Average rainfall in October:
2.48" - Average rainfall in November:
1.93" - Average rainfall in December:
2.68"
The wettest month (with the highest rainfall) is December (2.68").
The driest month (with the least rainfall) is September (1.34").
Average rainfall days
Mahwah, NJ
- Average rainfall days in January:
7.8 days - Average rainfall days in February:
9.3 days - Average rainfall days in March:
12.3 days - Average rainfall days in April:
15.2 days - Average rainfall days in May:
15.8 days - Average rainfall days in June:
15.4 days
- Average rainfall days in July:
16.6 days - Average rainfall days in August:
15 days - Average rainfall days in September:
11 days - Average rainfall days in October:
11.9 days - Average rainfall days in November:
9.5 days - Average rainfall days in December:
10.8 days
The month with the highest number of rainy days is July (16.6 days).
The month with the least rainy days is January (7.8 days).
Average snowfall
Mahwah, NJ
- Average snowfall in January:
2.28" - Average snowfall in February:
2.91" - Average snowfall in March:
2.64" - Average snowfall in April:
0.24" - Average snowfall in May:
0.2" - Average snowfall in June:
0"
The month with the highest snowfall is February (2.91").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Mahwah, NJ
- Average snowfall days in January:
7.1 days - Average snowfall days in February:
7.7 days - Average snowfall days in March:
6 days - Average snowfall days in April:
0.9 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:
1.5 days - Average snowfall days in December:
5.1 days
The month with the highest number of snowfall days is February (7.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Mahwah, 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 48min - 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:
5h and 0min - Average sunshine in February:
4h and 30min - Average sunshine in March:
6h and 6min - Average sunshine in April:
8h and 12min - Average sunshine in May:
8h and 24min - Average sunshine in June:
9h and 30min
- Average sunshine in July:
10h and 24min - Average sunshine in August:
10h and 12min - Average sunshine in September:
8h and 42min - Average sunshine in October:
5h and 42min - Average sunshine in November:
5h and 36min - Average sunshine in December:
4h and 48min
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 30min).
Average sunshine days
Mahwah, NJ
- Average sunshine days in January:
18.1 days - Average sunshine days in February:
14.5 days - Average sunshine days in March:
13.9 days - Average sunshine days in April:
12.7 days - Average sunshine days in May:
13.1 days - Average sunshine days in June:
11.8 days
- Average sunshine days in July:
12.3 days - Average sunshine days in August:
13.8 days - Average sunshine days in September:
16.3 days - Average sunshine days in October:
17 days - Average sunshine days in November:
18.8 days - Average sunshine days in December:
15.7 days
The month with the most sunshine days is November (18.8 days).
The month with the least sunshine days is June (11.8 days).
Average UV index
Mahwah, 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
Mahwah, NJ
The months with the most cloud cover are February and March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility
Mahwah, NJ
The months with the highest visibility are January, March, April, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are February and May (5mi).
