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September Weather in North Smithfield, United States

Last updated: June 24, 2025

In September, the average temperature in North Smithfield, United States hovers around 19°C (66°F), with minimum temperatures dipping to 4°C (40°F) and soaring up to a maximum of 34°C (94°F). Expect 8 days of rain, accumulating approximately 90 mm (3.5 in) of precipitation, all while maintaining an average humidity of 75%.

September Temperature in North Smithfield

In September in North Smithfield, the average temperature is 19°C (66°F). Maximums can reach 34°C (94°F) and minimums can be as low as 4°C (40°F). Travelers should be prepared for a wide range of temperatures and pack accordingly for both warm days and cooler evenings.

September Weather in North Smithfield: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in North Smithfield, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In North Smithfield, September typically has an average temperature of 19°C (66°F), with highs reaching up to 34°C (94°F) and lows dropping to around 4°C (40°F).
JanFebMarAprMayJunJulAugSepOctNovDec313338485968747366564334
Data source: Temperature data for North Smithfield 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 North Smithfield

In North Smithfield in September, the precipitation amount is 90 mm (3.5 in) spread over 8 days, indicating a relatively wet period for the region.

September Precipitation Trends in North Smithfield

The chart displays monthly precipitation patterns in North Smithfield, 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 North Smithfield, September typically receives around 90 mm (3.5 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec70869612610095137949014197119
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in North Smithfield

In North Smithfield in September humidity is 75%. With an average temperature of 19°C (66°F), this humidity feels like a warm, enveloping blanket, making it slightly uncomfortable for traveling as you navigate through the thick, muggy air.

September Average Humidity in North Smithfield

This chart illustrates the average monthly humidity levels in North Smithfield, 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 North Smithfield is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%84%82%79%75%78%76%76%76%75%80%80%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in North Smithfield

In North Smithfield 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 North Smithfield.

Maximum UV Index Levels in North Smithfield for September

The chart shows the monthly maximum UV Index (UVI) for North Smithfield 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 North Smithfield typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3568910998642
Data source: North Smithfield 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 North Smithfield Compares to Other Months

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

This table compares monthly weather conditions in North Smithfield, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (31°F)70 mm (2.8 inches)84%moderate
February Weather1°C (34°F)86 mm (3.4 inches)84%moderate
March Weather4°C (39°F)96 mm (3.8 inches)82%high
April Weather9°C (49°F)126 mm (5.0 inches)79%very high
May Weather15°C (59°F)100 mm (3.9 inches)75%very high
June Weather20°C (69°F)95 mm (3.7 inches)78%very high
July Weather23°C (74°F)137 mm (5.4 inches)76%very high
August Weather23°C (73°F)94 mm (3.7 inches)76%very high
September Weather19°C (66°F)90 mm (3.5 inches)75%very high
October Weather13°C (56°F)141 mm (5.6 inches)75%high
November Weather6°C (43°F)97 mm (3.8 inches)80%moderate
December Weather1°C (35°F)119 mm (4.7 inches)80%low

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