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September Weather in Newton, United States

Last updated: June 24, 2025

In September, the average temperature in Newton, United States is a pleasant 22°C (72°F). Temperatures can vary significantly, with a minimum of 7°C (45°F) and a maximum of 34°C (93°F). Visitors can expect approximately 69 mm (2.7 in) of precipitation over about 6 days, contributing to an average humidity of 79%, making the air feel quite sultry.

September Temperature in Newton

In September in Newton, the average temperature is 22°C (72°F). Maximum temperatures can reach 34°C (93°F), while minimum temperatures can drop as low as 7°C (45°F). This makes Newton an ideal destination for travelers who enjoy mild weather with the opportunity for both warm days and cooler nights.

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 22°C (72°F), with highs reaching up to 34°C (93°F) and lows dropping to around 7°C (45°F).
JanFebMarAprMayJunJulAugSepOctNovDec323546556776797672594338
Data source: Temperature data for Newton 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 Newton

In Newton in September, the precipitation amount is 69 mm (2.7 in) over a period of 6 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 69 mm (2.7 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec859312812214210610996691109481
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Newton

In Newton in September humidity is 79%. With an average temperature of 22°C (72°F), this humidity feels like you are enveloped in a warm, heavy blanket, making it feel considerably hotter and adding a layer of stickiness to your skin as you navigate through the streets.

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 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%82%84%83%80%83%82%83%79%79%88%87%
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.
JanFebMarAprMayJunJulAugSepOctNovDec357911111098643
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.
 TemperaturePrecipitationHumidityUV
January Weather0°C (32°F)85 mm (3.4 inches)84%moderate
February Weather2°C (35°F)93 mm (3.7 inches)82%moderate
March Weather8°C (46°F)128 mm (5.0 inches)84%high
April Weather13°C (55°F)122 mm (4.8 inches)83%very high
May Weather20°C (68°F)142 mm (5.6 inches)80%extreme
June Weather25°C (77°F)106 mm (4.2 inches)83%extreme
July Weather26°C (79°F)109 mm (4.3 inches)82%very high
August Weather24°C (76°F)96 mm (3.8 inches)82%very high
September Weather22°C (72°F)69 mm (2.7 inches)79%very high
October Weather15°C (59°F)110 mm (4.3 inches)79%high
November Weather6°C (43°F)94 mm (3.7 inches)88%moderate
December Weather3°C (38°F)81 mm (3.2 inches)87%moderate

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