September Weather in Newton, United States

Last updated: June 24, 2025

In September, the average temperature in Newton, United States is a pleasant 19°C (66°F). However, temperatures can fluctuate, with lows of 6°C (43°F) and highs reaching 32°C (90°F). Expect about 74 mm (2.9 in) of precipitation over 8 days, and enjoy a comfortable average humidity of 71%.

September Temperature in Newton

In September in Newton, the average temperature is 19°C (66°F), with maximums reaching 32°C (90°F) and minimums dropping as low as 6°C (43°F). This diverse temperature range makes it ideal for travelers seeking a mix of warm and cooler weather.

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

The chart illustrates September temperature patterns in Newton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Newton, September typically has an average temperature of 19°C (66°F), with highs reaching up to 32°C (90°F) and lows dropping to around 6°C (43°F).

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

September Precipitation in Newton

In Newton in September, the precipitation amount is 74 mm (2.9 in) over a period of 8 days.

September Precipitation Trends in Newton

The chart displays monthly precipitation patterns in Newton, 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 Newton, September typically receives around 74 mm (2.9 inches) of precipitation spread over approximately 8 days.

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

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Millimeters (mm) Inches (in)

September Humidity in Newton

In Newton in September humidity is 71%. With an average temperature of 19°C (66°F), this humidity feels like a warm, balmy embrace that enhances the tropical atmosphere, making it a perfect backdrop for leisurely strolls and outdoor adventures, though it may also lead to a slightly sticky feeling as you explore.

September Average Humidity in Newton

This chart illustrates the average monthly humidity levels in Newton, 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 Newton 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 Newton

In Newton in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Newton.

Maximum UV Index Levels in Newton for September

The chart shows the monthly maximum UV Index (UVI) for Newton 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 Newton typically reaches 7, which falls under the high exposure category.

Data source: Newton 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 Newton Compares to Other Months

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

This table compares monthly weather conditions in Newton, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-1°C (30°F)	71 mm (2.8 inches)	86%	low
February Weather	0°C (32°F)	89 mm (3.5 inches)	84%	moderate
March Weather	3°C (37°F)	87 mm (3.4 inches)	82%	moderate
April Weather	8°C (47°F)	131 mm (5.2 inches)	80%	very high
May Weather	14°C (58°F)	83 mm (3.3 inches)	72%	very high
June Weather	20°C (68°F)	88 mm (3.5 inches)	72%	very high
July Weather	23°C (73°F)	127 mm (5.0 inches)	67%	very high
August Weather	23°C (73°F)	70 mm (2.8 inches)	66%	very high
September Weather	19°C (66°F)	74 mm (2.9 inches)	71%	high
October Weather	13°C (56°F)	131 mm (5.1 inches)	78%	high
November Weather	6°C (43°F)	98 mm (3.9 inches)	84%	moderate
December Weather	1°C (34°F)	121 mm (4.8 inches)	81%	low