Sierra Vista weather in September 2025

Expect daytime maximum temperatures of 86°F in Sierra Vista, Arizona in September based on long-term weather averages. There are 10 hours of sunshine per day on average.

  • 86°F maximum daytime temperature in September in Sierra Vista86
    86°F max day temperature
  • 10 hours of sunshine per day
  • 7 days with some rainfall in September in Sierra Vista7
    7 days with some rainfall
  • 59°F minimum night-time temperature in September in Sierra Vista59
    59°F min night temperature
  • 12 hours of daylight per day in September in Sierra Vista12
    12 hours of daylight per day
  • Moderate heat & humidity in September in Sierra VistaM
    Moderate heat & humidity
  • 1.5 inches monthly rainfall in September in Sierra Vista1.5
    1.5 inches of monthly rainfall
  • UV (maximum) index 9 (Very High) in September in Sierra Vista9
    9 (Very High) UV index

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The September weather guide for Arizona (Sierra Vista) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C)  |  Imperial (°F)

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How hot is it in Sierra Vista in September?

Daytime temperatures usually reach 86°F in Sierra Vista in September with moderate heat and humidity, falling to 59°F at night.

How sunny is it in Sierra Vista in September?

There are normally 10 hours of bright sunshine each day in Sierra Vista in September - that's 80% of daylight hours.

Does it rain in Sierra Vista in September?

There are usually 7 days with some rain in Sierra Vista in September and the average monthly rainfall is 1.5 inches.

Sierra Vista September sunrise & sunset times

Browse the sunrise and sunset times for Sierra Vista in September 2025. Select a month to view Sierra Vista sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:57 18:44
Monday, 15th September 2025 06:05 18:26
Tuesday, 30th September 2025 06:14 18:07

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