Sierra Vista Weather in September

What's the weather like in Sierra Vista (Arizona) in September 2025?

The climate in Sierra Vista during September can be summarized as warm and reasonably dry.

September is in the fall / autumn in Sierra Vista and is typically the 4th warmest month of the year. Daytime maximum temperatures average around a comfortable 30°C (86°F), whilst at night 15°C (60°F) is normal.

Sierra Vista weather averages (imperial / metric)
Daytime temperature 30.2°C 86.3°F
Nightly temperature 15.3°C 59.5°F
Average temperature 22.7°C 72.9°F
Daily sunshine 10.6 hrs
Avg rainfall 38 mm 1.5 ins
Rainy days 7 days
Sea temperature 27.1°C 80.7°F
Humidity 53%
Windspeed 11.2kph 7 mph

On average September is the 3rd wettest month of the year in Sierra Vista with around 38mm 1.5 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 7 days, although this may vary considerably.

On the flip side this corresponds to an average of 10.6 hours of sunshine per day.

September temperatures in Sierra Vista

Sierra Vista average temperature in September

September rainfall

Sierra Vista average rain in September

September hourly sunshine

Sierra Vista average rain in September

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Sierra Vista in September 2025.

Other monthly averages

Best places to visit in September

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Sierra Vista weather stats

Sierra Vista weather statistics
Hottest month: July 33.2°C 91.8°F
Driest month: May 3mm 0.1ins
Sunniest month: June 13.2hrs
Coldest month: January 14.4°C 57.9°F
Wettest month: July 97mm 3.8ins
Map showing location of Sierra Vista (31.55454, -110.30369) Sierra Vista map pin © Google

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