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September Weather in Newport, United States

Last updated: June 24, 2025

In September, the average temperature in Newport, United States hovers around 18°C (64°F). Expect a range where minimums can dip to 1°C (35°F) and maximums soar to 33°C (91°F). Be prepared for some rain, as the region receives an average precipitation of 118 mm (4.7 in) over approximately 9 days. With an average humidity level of 81%, it’s a month that feels both warm and a touch tropical!

September Temperature in Newport

In September in Newport, the average temperature is 18°C (64°F). Maximums can reach 33°C (91°F), and minimums can be as low as 1°C (35°F). Travelers should be prepared for a range of temperatures and pack accordingly for both warm days and cooler evenings.

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

The chart illustrates September temperature patterns in Newport, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Newport, September typically has an average temperature of 18°C (64°F), with highs reaching up to 33°C (91°F) and lows dropping to around 1°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec171733435971747164483424
Data source: Temperature data for Newport 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 Newport

In Newport in September, the precipitation amount is 118 mm (4.7 in), occurring over a span of 9 days.

September Precipitation Trends in Newport

The chart displays monthly precipitation patterns in Newport, 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 Newport, September typically receives around 118 mm (4.7 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec31396187143103108124118973852
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Newport

In Newport in September, humidity is 81%. With an average temperature of 18°C (64°F), this humidity feels like a warm embrace, making travel both refreshing and slightly stifling at the same time.

September Average Humidity in Newport

This chart illustrates the average monthly humidity levels in Newport, 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 Newport is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%90%85%84%78%80%81%81%81%84%88%84%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Newport

In Newport 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 Newport.

Maximum UV Index Levels in Newport for September

The chart shows the monthly maximum UV Index (UVI) for Newport 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 Newport typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2457910997532
Data source: Newport 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 Newport Compares to Other Months

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

This table compares monthly weather conditions in Newport, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-8°C (17°F)31 mm (1.2 inches)87%low
February Weather-8°C (17°F)39 mm (1.5 inches)90%moderate
March Weather1°C (33°F)61 mm (2.4 inches)85%moderate
April Weather6°C (44°F)87 mm (3.4 inches)84%high
May Weather15°C (59°F)143 mm (5.6 inches)78%very high
June Weather22°C (71°F)103 mm (4.0 inches)80%very high
July Weather23°C (75°F)108 mm (4.2 inches)81%very high
August Weather21°C (71°F)124 mm (4.9 inches)81%very high
September Weather18°C (64°F)118 mm (4.7 inches)81%high
October Weather9°C (49°F)97 mm (3.8 inches)84%moderate
November Weather1°C (34°F)38 mm (1.5 inches)88%moderate
December Weather-5°C (24°F)52 mm (2.0 inches)84%low

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