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September Weather in Newton, United States

Last updated: June 24, 2025

In September, the average temperature in Newton, United States hovers around 22°C (73°F). Be prepared for a range of temperatures, though, as it can dip to a chilly 5°C (41°F) or rise to a sweltering 35°C (95°F). Expect approximately 85 mm (3.3 in) of precipitation over 7 days, accompanied by an average humidity of 67%. Stay comfortable and plan accordingly!

September Temperature in Newton

In September in Newton, the average temperature is 22°C (73°F). Maximums can reach 35°C (95°F), and minimums can be as low as 5°C (41°F). This makes Newton a great destination for travelers looking for warm days and cool evenings.

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 (73°F), with highs reaching up to 35°C (95°F) and lows dropping to around 5°C (41°F).
JanFebMarAprMayJunJulAugSepOctNovDec333448556677807772574538
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 total precipitation amount is 85 mm (3.3 in) over the course of 7 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 85 mm (3.3 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec3433847617610278128851032730
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 67%. With an average temperature of 22°C (73°F), this humidity feels like a warm, damp blanket enveloping you, making outdoor activities slightly uncomfortable but still bearable for travelers who enjoy a tropical atmosphere.

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 67%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec77%76%71%74%83%83%81%73%67%72%82%85%
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 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 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 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36710101111109753
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 Weather1°C (33°F)34 mm (1.4 inches)77%moderate
February Weather1°C (34°F)33 mm (1.3 inches)76%high
March Weather9°C (48°F)84 mm (3.3 inches)71%high
April Weather13°C (55°F)76 mm (3.0 inches)73%very high
May Weather19°C (66°F)176 mm (6.9 inches)83%very high
June Weather25°C (78°F)101 mm (4.0 inches)83%extreme
July Weather27°C (80°F)78 mm (3.1 inches)81%extreme
August Weather25°C (78°F)128 mm (5.0 inches)73%very high
September Weather22°C (73°F)85 mm (3.3 inches)67%very high
October Weather14°C (57°F)103 mm (4.0 inches)72%high
November Weather7°C (45°F)27 mm (1.1 inches)82%moderate
December Weather3°C (38°F)30 mm (1.2 inches)85%moderate

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