September Weather in Newton, United States

Last updated: June 24, 2025

In September, the average temperature in Newton, United States is a pleasant 25°C (78°F). However, temperatures can swing from a cool 11°C (52°F) to a scorching 38°C (101°F). Expect about 96 mm (3.8 in) of precipitation spread over 8 days, contributing to an average humidity of 74%. Don't forget your umbrella!

September Temperature in Newton

In September in Newton, the average temperature is 25°C (78°F). The maximum can reach 38°C (101°F), and the minimum can be as low as 11°C (52°F). This climate makes it a perfect time for travelers seeking warm weather and opportunities for 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 25°C (78°F), with highs reaching up to 38°C (101°F) and lows dropping to around 11°C (52°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 96 mm (3.8 in) over the course 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 96 mm (3.8 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 74%. With an average temperature of 25°C (78°F), this humidity feels like you're enveloped in a warm, thick blanket, making outdoor activities feel more strenuous and necessitating frequent breaks and hydration for comfortable travel.

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 74%, 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 reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. 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 10, 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	9°C (49°F)	107 mm (4.2 inches)	85%	moderate
February Weather	12°C (54°F)	155 mm (6.1 inches)	84%	high
March Weather	16°C (61°F)	124 mm (4.9 inches)	82%	very high
April Weather	18°C (65°F)	140 mm (5.5 inches)	82%	extreme
May Weather	23°C (74°F)	135 mm (5.3 inches)	82%	extreme
June Weather	26°C (79°F)	161 mm (6.4 inches)	79%	extreme
July Weather	27°C (81°F)	136 mm (5.3 inches)	82%	extreme
August Weather	27°C (81°F)	132 mm (5.2 inches)	77%	extreme
September Weather	25°C (78°F)	96 mm (3.8 inches)	74%	very high
October Weather	21°C (69°F)	98 mm (3.8 inches)	73%	very high
November Weather	13°C (56°F)	70 mm (2.7 inches)	85%	high
December Weather	11°C (52°F)	125 mm (4.9 inches)	88%	moderate