September Weather in Jersey City, United States

Last updated: February 24, 2025

In September, Jersey City experiences a delightful blend of warm days and cool nights, with maximum temperatures reaching up to 33°C (92°F) while the average hovers around 21°C (70°F). The nights can be refreshingly cool, dipping to a minimum of 9°C (49°F). Despite the warm climate, the city sees 92 mm (3.6 in) of precipitation spread over 9 days, contributing to a humidity level of 68% that enhances the vibrant atmosphere. Whether basking in the sun or enjoying cooler evenings, September's weather offers a dynamic experience that encapsulates the charm of Jersey City.

September Temperature in Jersey City

As summer winds down, September in Jersey City ushers in a delightful transition towards autumn. With minimum temperatures around 9°C (49°F) and an average of 21°C (70°F), the city experiences a pleasant warmth before cooler months set in. Highs can peak at 33°C (92°F), blending the lingering heat of August with the early crispness of fall. This month not only marks a significant drop from the sweltering summer extremes but also provides a welcome respite, inviting residents and visitors alike to enjoy outdoor activities in comfortable weather. The gradual cooling trend becomes unmistakable, hinting at the vibrant colors and fresh air that October will bring.

September Weather in Jersey City: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Jersey City, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec343642526272787670604638
Data source: Temperature data for Jersey City generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Jersey City

In September, Jersey City experiences a refreshing transition as the summer heat retreats. During this month, precipitation averages 92 mm (3.6 in), occurring over approximately 9 days. This rainfall, while slightly below the more humid summer months of July and August, maintains the city's lush landscapes as autumn begins to set in. Notably, September's precipitation paves the way for vibrant fall foliage, contrasting the warm summer scenery with the cooler, crisper air. As the month progresses, residents can expect a mix of sun-drenched days and gentle showers, emphasizing the shift in seasons and the unique charm that September brings to Jersey City's climate.

September Precipitation Trends in Jersey City

The chart displays monthly precipitation patterns in Jersey City, with values for each month alongside September's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec6710298112114921481279212883106
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Jersey City

As summer transitions to fall, September in Jersey City experiences a noticeable shift in humidity. With levels reaching 68%, this month marks a slight uptick from the drier summer months of July and August, which saw humidity levels drop to 62% and 65%, respectively. The general trend throughout the year illustrates a peak in humidity during the winter months, starting at a high 84% in January and gradually decreasing until hitting the annual low in July. As September settles in, residents begin to feel the humidity creeping back up, paving the way for the fresher, crisper air of autumn, while still holding onto the remnants of summer's warmth.

September Average Humidity in Jersey City

This chart illustrates the average monthly humidity levels in Jersey City, with September's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how September's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec84%82%81%78%70%69%62%65%68%74%82%80%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Jersey City

As September rolls in, Jersey City continues to experience a very high UV Index of 8, indicating that sun protection is still essential. This month marks a slight decrease from the peak summer months of July and August, where the UV Index reached 9 and remained at 10 in both June and May. Despite this reduction, the burn time remains short at just 15 minutes, calling for vigilance among outdoor enthusiasts. Comparatively, the UV Index has steadily decreased from a moderate 3 in January, rising through a pattern of increasing strength until the summer months. As we transition into fall, the data highlights the importance of continuing to stay protected—check the complete details on the Jersey City UV Index for tips on safe sun exposure.

Maximum UV Index Levels in Jersey City for September

The chart shows the monthly maximum UV Index (UVI) for Jersey City in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec35681010998642
Data source: Jersey City September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

September Sunshine in Jersey City

September in Jersey City shines brightly with 272 hours of sunshine, a delightful continuation of the summer's warmth. As the city transitions from the sun-drenched days of July and August, which boast 339 and 309 hours respectively, September marks a gentle decline while still holding onto a generous amount of sunshine. This month captures the essence of early autumn, where the vibrant colors of changing leaves complement the golden rays lingering in the sky. With sunshine steadily decreasing as the year progresses toward the more subdued months of October and November, September serves as a beautiful reminder of the summer days that were, making it an ideal time for outdoor activities before the chill of winter sets in.

Monthly Sunshine Duration in Jersey City: September Highlighted

The September sunshine duration represents the total number of hours Jersey City experiences direct sunlight during the month of September, excluding cloudy or obstructed periods. This chart compares the sunshine duration of September with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec148h177h248h238h271h310h339h309h272h218h208h175h
Data source: Jersey City September Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Jersey City During September

In Jersey City, the likelihood of enjoying sunny weather in September hovers around 45%, which aligns closely with the more temperate months of April and May. As we transition from the typically sun-scarce summer months of July and August, where the chances dip to 43% and 29% respectively, September presents a refreshing change with a harmony of pleasing temperatures and brighter skies. Notably, this marks an increase when compared to the sheer variability of the earlier months, suggesting that as summer fades, the sun isn't exactly ready to say goodbye just yet. While the opportunity for sunshine in Jersey City is ever-present, September stands out as a favorable month for those seeking to soak in the last rays of summer.

Percentage of Sunny Days in September in Jersey City

The chart illustrates the percentage of sunny days in Jersey City throughout the year, with September highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Jersey City experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec48%31%57%45%42%39%43%29%45%37%55%31%
Data source: Jersey City September chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Jersey City in September

As summer fades, September in Jersey City ushers in a subtle transition with 12 hours of daylight, marking a gentle decline from the peak brightness of 15 hours in June. This month serves as a bridge between the long, sun-drenched days of summer and the shorter daylight hours of autumn. Following the vibrant summer months of July and August, where daylight gradually waned from 14 to 13 hours, September’s light begins to dip further, foreshadowing October's return to 11 hours. The gradual reduction in daylight not only signals the changing seasons but also enhances the cozy ambiance of early fall, inviting residents to embrace the beauty of autumn in this bustling city.

Average Daylight Hours in Jersey City for September

The chart illustrates the variation in daylight duration in Jersey City throughout the year, with September highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec9h 36m10h 39m11h 58m13h 19m14h 28m15h 2m14h 43m13h 42m12h 24m11h 3m9h 53m9h 17m
Data source: Jersey City daylight hours, calculated by summing the hours between sunrise and sunset for each day.

September Winds in Jersey City

As summer fades and autumn begins, September winds in Jersey City usher in a refreshing change with an average speed of 3.1 m/s (7 mph). This marks a slight increase from the languid summer months, where wind speeds dwindled to their annual lows, averaging between 2.5 - 2.6 m/s (6 mph). With the arrival of fall, the winds regain strength, mirroring the vibrant transitions of the season as leaves start to turn. Interestingly, September's wind speed reflects a gentle uptick that aligns with the patterns seen through October and November, maintaining that invigorating pace of 3.1 m/s. This trend suggests the city is poised for breezy autumn days ahead, inviting residents and visitors alike to enjoy the crisp air and dynamic surroundings.

Average September Wind Speed in Jersey City

The chart displays monthly wind speed patterns in Jersey City, with values for each month shown alongside September's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how September's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec3.53.43.73.43.32.82.62.53.1 m/s3.13.12.9
Data source: Jersey City September wind data, generated using information from the Copernicus Climate Change Service.

How September Weather in Jersey City Compares to Other Months

The weather in Jersey City changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of September's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Jersey City and find detailed weather information for every month.

September and January present starkly contrasting weather conditions. In September, temperatures range from a cool minimum of 9°C (49°F) to a warm maximum of 33°C (92°F), with an average of 21°C (70°F), along with moderate humidity at 68%. This month typically receives about 92 mm (3.6 in) of precipitation over 9 days. In contrast, January experiences much colder temperatures, with a minimum of -18°C (-1°F) and a maximum of 18°C (64°F), resulting in an average of just 1°C (34°F). Despite receiving less precipitation at 67 mm (2.7 in) over 7 days, January’s higher humidity level at 84% contributes to a notably chilly and damp atmosphere. For a more detailed look at what to expect, check out Jersey City weather in January.

September and February present two starkly contrasting weather profiles. In September, temperatures typically range from a pleasant 21°C (70°F) during the day, with maximum highs reaching 33°C (92°F), making it a warm and inviting month. The average humidity sits at 68%, accompanied by around 92 mm (3.6 in) of precipitation across 9 days. In contrast, February brings a chill, with minimum temperatures plunging to -16°C (4°F) and an average of only 2°C (36°F). Despite having slightly higher precipitation at 102 mm (4.0 in) over 10 days, the humidity peaks at 82%, creating a distinctly colder and more damp atmosphere. For more detailed information on February's weather, you can visit Jersey City weather in February.

September and March exhibit stark contrasts in weather patterns. September boasts warmer temperatures, with a minimum of 9°C (49°F) and an average high of 33°C (92°F), while March features much cooler conditions, with a minimum dropping to -9°C (16°F) and an average high of just 25°C (77°F). Additionally, March experiences slightly higher humidity at 81%, compared to September's 68%. Precipitation levels are relatively similar, with September receiving 92 mm (3.6 in) over 9 days, and March having 98 mm (3.8 in) over 10 days. For a deeper look at what to expect during this transitional month, check out Jersey City weather in March.

In comparing the weather between September and April, notable differences emerge. September experiences much warmer temperatures, with a minimum of 9°C and an average high of 33°C, while April starts off chilly, with a minimum of -1°C and a maximum of 27°C. Precipitation is relatively high in both months, but April sees slightly more rain at 112 mm compared to September's 92 mm, and it also has more rainy days—12 in April versus 9 in September. With humidity levels higher in April at 78%, it certainly feels more damp compared to the 68% humidity seen in September. For more detailed insights, you can check out Jersey City weather in April.

When comparing the weather in September and May, we can observe some notable differences. September typically enjoys warmer temperatures, with a minimum of 9°C (49°F) and an average high of 33°C (92°F), while May has cooler temperatures, starting at a minimum of 3°C (37°F) and averaging a maximum of 31°C (88°F). Additionally, September experiences about 92 mm (3.6 in) of precipitation over 9 days, while May sees slightly more rain with 114 mm (4.5 in) spread across 13 days. Humidity levels are fairly similar, with September at 68% and May slightly higher at 69%. For more detailed insights, you can explore Jersey City weather in May.

In comparing the weather of September and June, we see that both months have similar average precipitation levels, each receiving 92 mm (3.6 in), yet September is characterized by slightly warmer temperature ranges, with a maximum of 33°C (92°F) compared to June's height of 35°C (94°F). The humidity levels are nearly identical, with June at 69% and September at 68%. However, September tends to experience fewer rainy days—only 9 compared to June's 13—making it a potentially drier month overall. For a closer look, you can check out Jersey City weather in June.

In comparing the weather of September and July, it is evident that July is generally hotter and more humid. July experiences minimum temperatures around 17°C (62°F) and averages 26°C (78°F), peaking at a maximum of 36°C (96°F). In contrast, September has cooler temperatures, with a minimum of 9°C (49°F) and an average of 21°C (70°F), reaching a maximum of 33°C (92°F). Additionally, July sees more precipitation, with 148 mm (5.8 in) over 13 days, compared to September’s 92 mm (3.6 in) falling on 9 days. Overall, July is marked by higher temperatures and more rain than September. For further details, check out Jersey City weather in July.

September weather is generally cooler than August, with average temperatures ranging from a minimum of 9°C (49°F) to a maximum of 33°C (92°F), compared to August’s milder temperatures of 16°C (61°F) to 34°C (93°F). While both months experience some rainfall, September has less precipitation at 92 mm (3.6 in) over 9 days, compared to August’s 127 mm (5.0 in) over 14 days. Interestingly, September’s humidity is slightly higher at 68%, compared to August’s 65%, indicating that even as temperatures drop, the air may feel a bit more muggy. For a more detailed look at August weather, you can visit Jersey City weather in August.

September and October present a noticeable shift in weather patterns. In September, the temperature ranges from a minimum of 9°C (49°F) to an average of 21°C (70°F) and a maximum of 33°C (92°F), accompanied by 92 mm (3.6 in) of precipitation over 9 days, with a humidity level of 68%. In contrast, October sees a drop in average temperatures to 16°C (61°F), with minimums at 4°C (39°F) and maximums reaching 33°C (91°F). Rainfall increases slightly to 128 mm (5.0 in) over 10 days, and humidity rises to 74%. This transition reflects not only cooler temperatures but also a wetter and more humid environment as autumn sets in. For a closer look at weather conditions for this month, check out Jersey City weather in October.

September weather features warmer temperatures, with an average of 21°C (70°F) and maximums reaching up to 33°C (92°F), making it a month of lingering summer warmth. In contrast, November sees a significant drop, with average highs around 8°C (47°F) and minimums plummeting to -9°C (17°F), signaling the arrival of winter. Both months experience a similar amount of precipitation, but November is characterized by a higher humidity level of 82%, compared to September’s 68%. For more detailed information, you can check Jersey City weather in November.

The weather in September presents a warm and pleasant climate, with average temperatures reaching 21°C (70°F) and highs of up to 33°C (92°F). Alongside this warmth, September experiences moderate humidity at 68% and about 92 mm (3.6 in) of precipitation over 9 days. In contrast, December brings a dramatic shift, with average temperatures dropping to 4°C (39°F) and nighttime lows plummeting to -11°C (13°F). The month sees increased precipitation levels, totaling 106 mm (4.2 in) across 10 days, coupled with a higher humidity level of 80%. For more details on December weather, you can check Jersey City weather in December.

Compare Jersey City's Climate with Cities Worldwide

Conclusion: What to Expect From September Weather in Jersey City

As September arrives in Jersey City, the weather begins to shift from the heat of summer to a more mild and pleasant atmosphere. While temperatures can still reach highs akin to summertime, the average provides a refreshing escape, often accompanied by the crispness that hints at the upcoming fall. With about nine days of rainfall and an increase in humidity, September is a transitional month that showcases the beauty of changing seasons. For those interested in the broader patterns of climate in this vibrant city, detailed insights can be found at Jersey City Climate.