Gilbert
Arizona, USA
Long-term weather forecast
Long-term weather forecast
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September weather forecast and Climate
Gilbert, AZ

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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 65°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.
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  • The 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).

  • The 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).

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  • The 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").

  • The average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 14.5h).
Months with shortest days are January and December (Average daylight: 10h).

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