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September Weather in Green Valley, United States

Last updated: June 24, 2025

In September, the average temperature in Green Valley, United States is a comfortable 26°C (79°F). However, temperatures can fluctuate significantly, with a minimum of 11°C (52°F) and a maximum soaring up to 38°C (101°F). Expect some rainfall, as 37 mm (1.5 in) of precipitation typically falls over 5 days, contributing to an average humidity level of 72%. Embrace the warmth and occasional showers as you explore this vibrant destination!

September Temperature in Green Valley

In September in Green Valley, the average temperature is 26°C (79°F). Maximum temperatures can reach 38°C (101°F), while the minimum can drop to as low as 11°C (52°F). This makes Green Valley an ideal destination for travelers seeking a warm climate, but be prepared for some cooler evenings.

September Weather in Green Valley: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Green Valley, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Green Valley, September typically has an average temperature of 26°C (79°F), with highs reaching up to 38°C (101°F) and lows dropping to around 11°C (52°F).
JanFebMarAprMayJunJulAugSepOctNovDec515259687484838279696151
Data source: Temperature data for Green Valley 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 Green Valley

In Green Valley in September, the precipitation amount is 37 mm (1.5 in) spread over a period of 5 days.

September Precipitation Trends in Green Valley

The chart displays monthly precipitation patterns in Green Valley, 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 Green Valley, September typically receives around 37 mm (1.5 inches) of precipitation spread over approximately 5 days.
JanFebMarAprMayJunJulAugSepOctNovDec223116449746237111522
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Green Valley

In Green Valley in September, humidity is 72%. With an average temperature of 26°C (79°F), this humidity feels like a warm blanket wrapping around you, making outdoor activities feel a bit more strenuous but also adding a tropical charm to your travels.

September Average Humidity in Green Valley

This chart illustrates the average monthly humidity levels in Green Valley, 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 Green Valley is approximately 72%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec74%71%60%43%32%28%38%60%72%66%74%81%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Green Valley

In Green Valley in September, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Green Valley.

Maximum UV Index Levels in Green Valley for September

The chart shows the monthly maximum UV Index (UVI) for Green Valley 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 Green Valley typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec5710121213121211965
Data source: Green Valley 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 Green Valley Compares to Other Months

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

This table compares monthly weather conditions in Green Valley, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather10°C (51°F)22 mm (0.9 inches)74%moderate
February Weather11°C (53°F)31 mm (1.2 inches)71%high
March Weather15°C (59°F)16 mm (0.6 inches)60%very high
April Weather20°C (68°F)4 mm (0.2 inches)43%extreme
May Weather23°C (74°F)4 mm (0.1 inches)32%extreme
June Weather29°C (84°F)9 mm (0.3 inches)28%extreme
July Weather28°C (83°F)74 mm (2.9 inches)38%extreme
August Weather28°C (82°F)62 mm (2.4 inches)60%extreme
September Weather26°C (79°F)37 mm (1.5 inches)72%extreme
October Weather21°C (70°F)11 mm (0.4 inches)66%very high
November Weather16°C (61°F)15 mm (0.6 inches)74%high
December Weather11°C (52°F)22 mm (0.9 inches)81%moderate

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