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September Weather in Greenfield, United States

Last updated: June 24, 2025

In Greenfield, United States, the average temperature in September is a pleasant 23°C (74°F). However, be prepared for a range of temperatures, as the minimum can dip to 8°C (47°F), while the maximum can soar to 35°C (95°F). During this month, expect about 64 mm (2.5 in) of precipitation over approximately 6 days, accompanied by an average humidity level of 64%. Make sure to plan accordingly!

September Temperature in Greenfield

In September in Greenfield, the average temperature is 23°C (74°F). Maximum temperatures can reach 35°C (95°F), while the minimum can drop as low as 8°C (47°F). This diverse range of temperatures makes it essential for travelers to pack both light clothing for the warm days and warmer layers for cooler evenings.

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 23°C (74°F), with highs reaching up to 35°C (95°F) and lows dropping to around 8°C (47°F).
JanFebMarAprMayJunJulAugSepOctNovDec353749566777807773594741
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 total precipitation amount is 64 mm (2.5 in) during a span of 6 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 64 mm (2.5 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec74671331321758098132641256045
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 64%. With an average temperature of 23°C (74°F), this humidity feels like a warm blanket wrapping around you, making outdoor exploration enjoyable yet slightly sticky, so it's best to stay hydrated and take breaks in the shade while traveling.

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 64%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec81%78%76%78%83%83%78%68%64%70%83%87%
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.
JanFebMarAprMayJunJulAugSepOctNovDec36710101111109753
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 Weather2°C (35°F)74 mm (2.9 inches)81%moderate
February Weather3°C (38°F)67 mm (2.6 inches)78%high
March Weather10°C (50°F)133 mm (5.2 inches)76%high
April Weather13°C (56°F)132 mm (5.2 inches)78%very high
May Weather19°C (67°F)175 mm (6.9 inches)83%very high
June Weather25°C (77°F)80 mm (3.1 inches)83%extreme
July Weather27°C (80°F)98 mm (3.9 inches)78%extreme
August Weather25°C (77°F)132 mm (5.2 inches)68%very high
September Weather23°C (74°F)64 mm (2.5 inches)64%very high
October Weather15°C (59°F)125 mm (4.9 inches)70%high
November Weather8°C (47°F)60 mm (2.3 inches)83%moderate
December Weather5°C (42°F)45 mm (1.8 inches)87%moderate

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