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September Weather in Greenfield, United States

Last updated: June 24, 2025

In September, the average temperature in Greenfield, United States hovers around 22°C (71°F). However, you can expect a minimum of 6°C (43°F) and a maximum of 34°C (94°F). During this month, the area typically sees about 76 mm (3.0 in) of precipitation over 6 days, with an average humidity level of 76%.

September Temperature in Greenfield

In September in Greenfield, the average temperature is 22°C (71°F). Maximums can reach 34°C (94°F), and minimums can be as low as 6°C (43°F). Be prepared for a range of temperatures if you plan to travel during this time, as it can be pleasantly warm during the day but cooler at night.

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 22°C (71°F), with highs reaching up to 34°C (94°F) and lows dropping to around 6°C (43°F).
JanFebMarAprMayJunJulAugSepOctNovDec303345546675787571584337
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 reaches 76 mm (3.0 in) over the course 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 76 mm (3.0 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec68741351231501078911376976751
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 76%. With an average temperature of 22°C (71°F), this humidity feels like traveling through a warm, dense mist that clings to your skin, making every step feel heavier and the air seem thicker, which can be quite draining for outdoor activities.

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 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%80%80%80%82%83%81%80%76%76%85%86%
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.
JanFebMarAprMayJunJulAugSepOctNovDec356910111199643
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 Weather-1°C (31°F)68 mm (2.7 inches)82%moderate
February Weather1°C (34°F)74 mm (2.9 inches)80%moderate
March Weather7°C (45°F)135 mm (5.3 inches)80%high
April Weather12°C (54°F)123 mm (4.8 inches)80%very high
May Weather19°C (66°F)150 mm (5.9 inches)82%very high
June Weather24°C (76°F)107 mm (4.2 inches)83%extreme
July Weather26°C (79°F)89 mm (3.5 inches)81%extreme
August Weather24°C (75°F)113 mm (4.5 inches)80%very high
September Weather22°C (71°F)76 mm (3.0 inches)76%very high
October Weather14°C (58°F)97 mm (3.8 inches)76%high
November Weather6°C (43°F)67 mm (2.6 inches)85%moderate
December Weather3°C (37°F)51 mm (2.0 inches)86%moderate

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