September Weather in Newton, United States

Last updated: June 24, 2025

In September, the average temperature in Newton, United States is a comfortable 20°C (68°F), with a minimum dipping to 4°C (39°F) and soaring to a maximum of 33°C (92°F). Expect 119 mm (4.7 in) of precipitation spread over about 10 days, contributing to an average humidity of 73%. Perfect for those who enjoy a mix of warm weather and occasional rain!

September Temperature in Newton

In September in Newton, the average temperature is 20°C (68°F). Maximum temperatures can reach up to 33°C (92°F), while minimums can drop as low as 4°C (39°F). It's a great time for travelers to enjoy mild weather and plan outdoor activities.

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 20°C (68°F), with highs reaching up to 33°C (92°F) and lows dropping to around 4°C (39°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 total precipitation amount is 119 mm (4.7 in) over the span of 10 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 119 mm (4.7 inches) of precipitation spread over approximately 10 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 73%. With an average temperature of 20°C (68°F), this humidity feels like a warm embrace, making outdoor activities somewhat sticky, yet the atmosphere remains pleasant for leisurely strolls and sightseeing.

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 73%, 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 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to 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 8, which falls under the very 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	-6°C (22°F)	41 mm (1.6 inches)	78%	moderate
February Weather	-5°C (23°F)	46 mm (1.8 inches)	80%	moderate
March Weather	4°C (39°F)	80 mm (3.1 inches)	77%	high
April Weather	9°C (49°F)	79 mm (3.1 inches)	77%	very high
May Weather	17°C (62°F)	165 mm (6.5 inches)	77%	very high
June Weather	23°C (74°F)	126 mm (5.0 inches)	81%	extreme
July Weather	24°C (76°F)	80 mm (3.1 inches)	81%	very high
August Weather	23°C (73°F)	75 mm (2.9 inches)	77%	very high
September Weather	20°C (68°F)	119 mm (4.7 inches)	73%	very high
October Weather	11°C (53°F)	144 mm (5.7 inches)	75%	high
November Weather	3°C (38°F)	45 mm (1.8 inches)	85%	moderate
December Weather	-1°C (31°F)	37 mm (1.4 inches)	83%	moderate