Arizona, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Gilbert, AZ

September is the extension of the hot summer season in Gilbert, with an average range between 70°F (21.1°C) to 99°F (37.2°C). The temperatures are low compared to the peak of the summer, but it is still sweltering as most of the days cross 100°F (37.8°C). The days are sunny and bright, with 11 hours of sunlight. Nights are usually warm and rarely drop below 64.9°F (18.3°C).
September is usually calm, with the average wind speed of 6mph (9.7km/h). Stargazing activities are one of the largest beneficiaries of the clear skies, a lack of tall buildings, and the presence of the Gilbert Centennial Rotary Observatory in Gilbert.

What is the temperature in September in Gilbert?

The average high-temperature, in September, is 100°F (37.8°C), while the average low-temperature is 70°F (21.1°C).

How much does it rain in Gilbert in September?

During September, Gilbert regularly aggregates up to 0.9" (22.6mm) of precipitation.

How many hours of daylight does Gilbert have in September?

In September, the average length of the day in Gilbert, Arizona, is 12.4h.
Average temperature in September - Gilbert, AZ
  • Average high temperature in September: 100°F

The warmest month (with the highest average high temperature) is July (107°F).
Months with the lowest average high temperature are January and December (67°F).

  • Average low temperature in September: 70°F

The month with the highest average low temperature is July (77°F).
The coldest month (with the lowest average low temperature) is December (40°F).

Average rainfall in September - Gilbert, AZ
  • Average rainfall in September: 0.9"

The wettest month (with the highest rainfall) is March (1.2").
The driest month (with the lowest rainfall) is June (0").

Average daylight in September - Gilbert, AZ
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.3h).
The month with shortest days is December (Average daylight: 10h).