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September Weather in New Boston, United States

Last updated: June 24, 2025

In New Boston, United States, the average temperature in September hovers around 21°C (71°F), making it a pleasant time to visit. However, temperatures can fluctuate, with a minimum of 7°C (44°F) and peaking at a hot 37°C (99°F). Expect about 109 mm (4.3 in) of rainfall spread over 8 days, and a moderate average humidity of 73%. Embrace the variety this month brings!

September Temperature in New Boston

In September in New Boston, the average temperature is 21°C (71°F). Maximums can reach 37°C (99°F) and minimums can be as low as 7°C (44°F). This range of temperatures makes New Boston an ideal destination for travelers seeking both warm and cooler experiences.

September Weather in New Boston: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in New Boston, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In New Boston, September typically has an average temperature of 21°C (71°F), with highs reaching up to 37°C (99°F) and lows dropping to around 7°C (44°F).
JanFebMarAprMayJunJulAugSepOctNovDec353946556673787570604540
Data source: Temperature data for New Boston 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 New Boston

In New Boston in September, the total precipitation amount is 109 mm (4.3 in) spread over 8 days.

September Precipitation Trends in New Boston

The chart displays monthly precipitation patterns in New Boston, 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 New Boston, September typically receives around 109 mm (4.3 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec8512410612812815710712011011677112
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in New Boston

In New Boston in September humidity is 73%. With an average temperature of 21°C (71°F), this humidity feels like a warm, enveloping blanket that can make outdoor activities a bit uncomfortable, but with proper hydration and breaks in the shade, it’s still manageable for traveling.

September Average Humidity in New Boston

This chart illustrates the average monthly humidity levels in New Boston, 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 New Boston is approximately 73%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%88%87%85%81%82%81%73%73%78%89%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in New Boston

In New Boston 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 New Boston.

Maximum UV Index Levels in New Boston for September

The chart shows the monthly maximum UV Index (UVI) for New Boston 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 New Boston typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357910101098653
Data source: New Boston 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 New Boston Compares to Other Months

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

This table compares monthly weather conditions in New Boston, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather2°C (35°F)85 mm (3.3 inches)88%moderate
February Weather4°C (39°F)124 mm (4.9 inches)88%moderate
March Weather8°C (47°F)106 mm (4.2 inches)87%high
April Weather13°C (55°F)128 mm (5.0 inches)85%very high
May Weather19°C (66°F)128 mm (5.0 inches)81%very high
June Weather23°C (73°F)157 mm (6.2 inches)82%very high
July Weather25°C (78°F)107 mm (4.2 inches)81%very high
August Weather24°C (75°F)120 mm (4.7 inches)73%very high
September Weather21°C (71°F)109 mm (4.3 inches)73%very high
October Weather15°C (60°F)116 mm (4.5 inches)78%high
November Weather7°C (45°F)77 mm (3.0 inches)89%moderate
December Weather4°C (40°F)112 mm (4.4 inches)87%moderate

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