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September Weather in Blackstone, United States

Last updated: June 24, 2025

In September, the average temperature in Blackstone, United States hovers around 23°C (74°F). However, be prepared for a wide range of temperatures, with minimums dipping to 8°C (46°F) and maximums soaring to 36°C (98°F). This month brings about 103 mm (4.0 in) of rainfall spread over 9 days, contributing to an average humidity of 75%—giving you that classic, tropical feel!

September Temperature in Blackstone

In September in Blackstone, the average temperature is 23°C (74°F). Maximum temperatures can reach 36°C (98°F), while minimums can drop as low as 8°C (46°F). It's advisable to pack both lightweight clothing for the warm days and warmer layers for the cooler evenings.

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

The chart illustrates September temperature patterns in Blackstone, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Blackstone, September typically has an average temperature of 23°C (74°F), with highs reaching up to 36°C (98°F) and lows dropping to around 8°C (46°F).
JanFebMarAprMayJunJulAugSepOctNovDec414651606975817873645045
Data source: Temperature data for Blackstone 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 Blackstone

In Blackstone in September, the precipitation amount is 103 mm (4.0 in) over the course of 9 days.

September Precipitation Trends in Blackstone

The chart displays monthly precipitation patterns in Blackstone, 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 Blackstone, September typically receives around 103 mm (4.0 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec7410173106111118911421031167797
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Blackstone

In Blackstone in September, humidity is 75%. With an average temperature of 23°C (74°F), this humidity feels like a warm, heavy blanket wrapping around you, making it feel more sweltering than it actually is, which can be quite uncomfortable for traveling.

September Average Humidity in Blackstone

This chart illustrates the average monthly humidity levels in Blackstone, 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 Blackstone is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%84%84%82%83%83%79%77%75%81%87%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Blackstone

In Blackstone 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 Blackstone.

Maximum UV Index Levels in Blackstone for September

The chart shows the monthly maximum UV Index (UVI) for Blackstone 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 Blackstone typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3679101010109753
Data source: Blackstone 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 Blackstone Compares to Other Months

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

This table compares monthly weather conditions in Blackstone, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)74 mm (2.9 inches)84%moderate
February Weather8°C (46°F)101 mm (4.0 inches)84%high
March Weather10°C (51°F)73 mm (2.9 inches)84%high
April Weather16°C (60°F)106 mm (4.2 inches)82%very high
May Weather20°C (69°F)111 mm (4.4 inches)82%very high
June Weather24°C (76°F)118 mm (4.7 inches)83%very high
July Weather27°C (81°F)91 mm (3.6 inches)79%very high
August Weather26°C (78°F)142 mm (5.6 inches)77%very high
September Weather23°C (74°F)103 mm (4.0 inches)75%very high
October Weather18°C (64°F)116 mm (4.6 inches)81%high
November Weather10°C (50°F)77 mm (3.0 inches)87%moderate
December Weather7°C (45°F)97 mm (3.8 inches)85%moderate

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