September Weather in Gilbert, United States

Last updated: June 24, 2025

In Gilbert, United States, the average temperature in September reaches a warm 31°C (88°F). During this time, you might experience cool evenings with a minimum temperature dipping to 12°C (54°F), while scorching days can soar up to 45°C (113°F). Expect some moisture, as precipitation averages around 24 mm (0.9 in) over just 2 days, contributing to an average humidity of 64%. Be prepared for both heat and a touch of rain!

September Temperature in Gilbert

In September in Gilbert, the average temperature is 31°C (88°F). Maximums can reach 45°C (113°F), and minimums can be as low as 12°C (54°F). Travelers should be prepared for hot days and cooler nights, making layering essential for comfort.

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 31°C (88°F), with highs reaching up to 45°C (113°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 total precipitation amount is 24 mm (0.9 in) over a period of 2 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 24 mm (0.9 inches) of precipitation spread over approximately 2 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 64%. With an average temperature of 31°C (88°F), this humidity feels like a warm, enveloping blanket, making outdoor activities more challenging and creating a thirst for refreshing drinks as you navigate the sights.

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 64%, 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	12°C (54°F)	24 mm (0.9 inches)	76%	moderate
February Weather	14°C (57°F)	36 mm (1.4 inches)	79%	high
March Weather	18°C (65°F)	23 mm (0.9 inches)	67%	very high
April Weather	24°C (75°F)	2 mm (0.1 inches)	55%	extreme
May Weather	27°C (82°F)	2 mm (0.1 inches)	40%	extreme
June Weather	33°C (92°F)	3 mm (0.1 inches)	33%	extreme
July Weather	35°C (95°F)	37 mm (1.5 inches)	34%	extreme
August Weather	34°C (94°F)	35 mm (1.4 inches)	48%	extreme
September Weather	31°C (88°F)	24 mm (0.9 inches)	64%	very high
October Weather	24°C (76°F)	21 mm (0.8 inches)	67%	very high
November Weather	19°C (66°F)	19 mm (0.7 inches)	77%	moderate
December Weather	13°C (55°F)	26 mm (1.0 inches)	82%	moderate