September Weather in Gilbert, United States

Last updated: June 24, 2025

In Gilbert, United States, the average temperature in September hovers around 25°C (77°F). However, you can expect a range, with minimums dropping to 11°C (52°F) and maximums soaring to 36°C (97°F). During this month, precipitation averages 89 mm (3.5 in) spread over 8 days, contributing to a notably high average humidity of 83%. Prepare accordingly for a warm, sometimes wet, climate!

September Temperature in Gilbert

In September in Gilbert, the average temperature is 25°C (77°F). Maximum temperatures can reach 36°C (97°F), while minimums can drop to as low as 11°C (52°F). This range makes it an ideal time for travelers to enjoy both warm days and cooler evenings.

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 25°C (77°F), with highs reaching up to 36°C (97°F) and lows dropping to around 11°C (52°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 83%. With an average temperature of 25°C (77°F), this humidity feels like a warm, enveloping blanket, making it essential for travelers to stay hydrated and seek shade to enjoy their adventures comfortably.

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 83%, 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 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 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 9, 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	9°C (48°F)	85 mm (3.4 inches)	86%	moderate
February Weather	11°C (53°F)	113 mm (4.5 inches)	81%	high
March Weather	14°C (57°F)	83 mm (3.2 inches)	81%	very high
April Weather	18°C (64°F)	111 mm (4.4 inches)	79%	very high
May Weather	23°C (73°F)	111 mm (4.4 inches)	75%	extreme
June Weather	26°C (78°F)	100 mm (3.9 inches)	75%	extreme
July Weather	27°C (81°F)	145 mm (5.7 inches)	80%	extreme
August Weather	27°C (80°F)	146 mm (5.8 inches)	81%	extreme
September Weather	25°C (77°F)	89 mm (3.5 inches)	83%	very high
October Weather	20°C (68°F)	78 mm (3.1 inches)	78%	very high
November Weather	13°C (55°F)	74 mm (2.9 inches)	85%	high
December Weather	10°C (51°F)	120 mm (4.7 inches)	87%	moderate