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

September weather forecast and Climate
Yuma, AZ

Aerial view of the Arizona/California border with the Colorado River in Yuma, Arizona
Aerial view of the Arizona/California border with the Colorado River in Yuma, Arizona
September is the rainiest month in Yuma and an extension of the summer season with the average temperatures in the hot zone of 76°F (24.4°C) to 102°F (38.9°C). Most days are above 90°F (32.2°C) while nights register over 60°F (15.6°C).
Winds from the Gulf of Mexico in the southeast carry moisture as the month receives an average of 0.5" (12.7mm) of rain. Overall, the days are hot, a combination of sunny and cloudy, with average humidity in the range of 40% to 50%.
September does not find many visitors to Yuma due to unfavorable and hot weather conditions.
  • The average high temperature in September: 101.3°F

The warmest month (with the highest average high temperature) is July (106.8°F).
The month with the lowest average high temperature is December (68.3°F).

  • The average low temperature in September: 76.5°F

The month with the highest average low temperature is August (82.3°F).
The coldest month (with the lowest average low temperature) is December (46.6°F).

  • The average rainfall in September: 0.5"

Wettest months (with the highest rainfall) are August, September and December (0.5").
Driest months (with the lowest rainfall) are May and June (0").

  • The average rainfall days in September: 1.2 days

Months with the highest number of rainy days are January and August (2.3 days).
The month with the lowest number of rainy days is June (0.2 days).

  • The average daylight in September: 12h

Months with the longest days are May, June and July (Average daylight: 14h).
Months with shortest days are January, November and December (Average daylight: 10h).

  • The average sunshine in September: 11.4h

The month with most sunshine is June (Average sunshine: 13.8h).
The month with least sunshine is December (Average sunshine: 8.2h).

  • The average UV index in September: 9

The month with the highest UV index is July (UV index 11).
Months with the lowest UV index are January and December (UV index 3).