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September Weather in Greenfield, United States

Last updated: June 24, 2025

In Greenfield, United States, the average temperature in September hovers around 21°C (71°F). This period can bring fluctuations, with minimums dipping to 7°C (44°F) and soaring to a maximum of 41°C (107°F). Rain is scarce, with a mere 1 mm (0.0 in) of precipitation over 0 days, and humidity levels maintain a comfortable 55%.

September Temperature in Greenfield

In September in Greenfield, the average temperature is 21°C (71°F). Maximum temperatures can reach 41°C (107°F), while minimum temperatures can drop to as low as 7°C (44°F). Be prepared for a wide range of temperatures when traveling to Greenfield this September.

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

The chart illustrates September temperature patterns in Greenfield, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Greenfield, September typically has an average temperature of 21°C (71°F), with highs reaching up to 41°C (107°F) and lows dropping to around 7°C (44°F).
JanFebMarAprMayJunJulAugSepOctNovDec495052576169747471645649
Data source: Temperature data for Greenfield 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 Greenfield

In Greenfield in September, the precipitation amount is 1 mm (0.0 in) during a span of 0 days.

September Precipitation Trends in Greenfield

The chart displays monthly precipitation patterns in Greenfield, 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 Greenfield, September typically receives around 1 mm (0.0 inches) of precipitation spread over approximately 0 days.
JanFebMarAprMayJunJulAugSepOctNovDec112757421151011102776
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Greenfield

In Greenfield in September, humidity is 55%. With an average temperature of 21°C (71°F), this humidity feels like a warm embrace, making it pleasant for daytime exploration while occasionally calling for a refreshing drink or a shaded spot to relax.

September Average Humidity in Greenfield

This chart illustrates the average monthly humidity levels in Greenfield, 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 Greenfield is approximately 55%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%84%82%78%71%64%59%54%55%62%78%80%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Greenfield

In Greenfield 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 Greenfield.

Maximum UV Index Levels in Greenfield for September

The chart shows the monthly maximum UV Index (UVI) for Greenfield 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 Greenfield typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec4589111212119753
Data source: Greenfield 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 Greenfield Compares to Other Months

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

This table compares monthly weather conditions in Greenfield, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather10°C (50°F)112 mm (4.4 inches)82%moderate
February Weather10°C (50°F)75 mm (2.9 inches)84%moderate
March Weather11°C (52°F)74 mm (2.9 inches)82%very high
April Weather14°C (57°F)21 mm (0.8 inches)78%very high
May Weather16°C (62°F)15 mm (0.6 inches)71%extreme
June Weather21°C (69°F)1 mm (0.0 inches)64%extreme
July Weather23°C (75°F)0 mm (0.0 inches)58%extreme
August Weather24°C (75°F)0 mm (0.0 inches)54%extreme
September Weather21°C (71°F)1 mm (0.0 inches)55%very high
October Weather18°C (64°F)10 mm (0.4 inches)62%high
November Weather13°C (56°F)27 mm (1.0 inches)78%moderate
December Weather10°C (50°F)76 mm (3.0 inches)80%moderate

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