September Weather in Newark, United States

Last updated: June 24, 2025

In Newark, United States, the average temperature in September hovers around 24°C (75°F), creating a pleasantly warm atmosphere. However, be prepared for temperature swings, as it can dip to a cool 9°C (48°F) at night or climb as high as 36°C (96°F) during the day. Expect 85 mm (3.4 in) of rainfall spread over 7 days, contributing to an average humidity level of 71%. Whether you're exploring the outdoors or enjoying a cozy indoor retreat, this month in Newark promises a unique climatic experience!

September Temperature in Newark

In September in Newark, the average temperature is 24°C (75°F), with maximums reaching up to 36°C (96°F) and minimums dropping as low as 9°C (48°F). It's a great time to visit if you enjoy warm days and cooler nights, but be sure to pack accordingly for the temperature swings.

September Weather in Newark: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Newark, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Newark, September typically has an average temperature of 24°C (75°F), with highs reaching up to 36°C (96°F) and lows dropping to around 9°C (48°F).

Data source: Temperature data for Newark generated using information from the Copernicus Climate Change Service.

September Precipitation in Newark

In Newark in September, the precipitation amount is 85 mm (3.4 in) over the course of 7 days.

September Precipitation Trends in Newark

The chart displays monthly precipitation patterns in Newark, 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. In Newark, September typically receives around 85 mm (3.4 inches) of precipitation spread over approximately 7 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Newark

In Newark in September, humidity is 71%. With an average temperature of 24°C (75°F), this humidity feels like a warm embrace, making outdoor activities for traveling both refreshing and sometimes a bit stifling, prompting travelers to seek shaded spots or refreshing drinks while exploring.

September Average Humidity in Newark

This chart illustrates the average monthly humidity levels in Newark, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Newark is approximately 71%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Newark

In Newark in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Newark.

Maximum UV Index Levels in Newark for September

The chart shows the monthly maximum UV Index (UVI) for Newark 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. In September, the maximum UV index in Newark typically reaches 9, which falls under the very high exposure category.

Data source: Newark 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.

How September Weather in Newark Compares to Other Months

Weather in Newark varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Newark, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Newark, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	4°C (40°F)	86 mm (3.4 inches)	84%	moderate
February Weather	6°C (43°F)	142 mm (5.6 inches)	83%	high
March Weather	12°C (53°F)	147 mm (5.8 inches)	81%	very high
April Weather	15°C (60°F)	157 mm (6.2 inches)	81%	very high
May Weather	21°C (70°F)	160 mm (6.3 inches)	83%	extreme
June Weather	25°C (78°F)	87 mm (3.4 inches)	83%	extreme
July Weather	27°C (82°F)	103 mm (4.0 inches)	81%	extreme
August Weather	26°C (79°F)	119 mm (4.7 inches)	74%	very high
September Weather	24°C (75°F)	85 mm (3.4 inches)	71%	very high
October Weather	17°C (63°F)	112 mm (4.4 inches)	76%	high
November Weather	9°C (49°F)	76 mm (3.0 inches)	84%	moderate
December Weather	7°C (45°F)	102 mm (4.0 inches)	88%	moderate