September Weather in Gilbert, United States

Last updated: June 24, 2025

In Gilbert, United States, the average temperature in September reaches a warm 27°C (80°F), with a comfortable minimum of 12°C (54°F) and a scorching maximum of 40°C (104°F). Expect 89 mm (3.5 in) of precipitation spread over about 8 days, contributing to an average humidity of 79%—perfect for those who enjoy a tropical ambiance!

September Temperature in Gilbert

In September in Gilbert, the average temperature is 27°C (80°F), with maximums reaching up to 40°C (104°F) and minimums dropping as low as 12°C (54°F). It's advisable to pack lightweight clothing for the daytime and a light jacket for cooler evenings during your travels.

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

The chart illustrates September temperature patterns in Gilbert, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Gilbert, September typically has an average temperature of 27°C (80°F), with highs reaching up to 40°C (104°F) and lows dropping to around 12°C (54°F).

Data source: Temperature data for Gilbert generated using information from the Copernicus Climate Change Service.

September Precipitation in Gilbert

In Gilbert in September, the precipitation amount is 89 mm (3.5 in) over a span of 8 days.

September Precipitation Trends in Gilbert

The chart displays monthly precipitation patterns in Gilbert, 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 Gilbert, September typically receives around 89 mm (3.5 inches) of precipitation spread over approximately 8 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in Gilbert

In Gilbert in September humidity is 79%. With an average temperature of 27°C (80°F), this humidity feels like walking through a warm, dense blanket, making travel feel sluggish and allowing every step to become noticeably heavier.

September Average Humidity in Gilbert

This chart illustrates the average monthly humidity levels in Gilbert, 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 Gilbert is approximately 79%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Gilbert

In Gilbert in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Gilbert.

Maximum UV Index Levels in Gilbert for September

The chart shows the monthly maximum UV Index (UVI) for Gilbert 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 Gilbert typically reaches 10, which falls under the very high exposure category.

Data source: Gilbert 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 Gilbert Compares to Other Months

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

This table compares monthly weather conditions in Gilbert, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	10°C (49°F)	117 mm (4.6 inches)	83%	moderate
February Weather	12°C (54°F)	165 mm (6.5 inches)	83%	high
March Weather	17°C (62°F)	114 mm (4.5 inches)	80%	very high
April Weather	19°C (66°F)	138 mm (5.4 inches)	81%	extreme
May Weather	24°C (75°F)	134 mm (5.3 inches)	81%	extreme
June Weather	27°C (80°F)	130 mm (5.1 inches)	78%	extreme
July Weather	28°C (83°F)	113 mm (4.4 inches)	79%	extreme
August Weather	28°C (83°F)	110 mm (4.3 inches)	79%	extreme
September Weather	27°C (80°F)	89 mm (3.5 inches)	79%	very high
October Weather	21°C (70°F)	119 mm (4.7 inches)	77%	very high
November Weather	13°C (56°F)	83 mm (3.2 inches)	85%	high
December Weather	12°C (53°F)	123 mm (4.8 inches)	88%	moderate