Grand Canyon weather in September 2026

Q: How hot is it in Grand Canyon in September?

Daytime temperatures usually reach 37°C in Grand Canyon in September with very high heat and humidity, falling to 21°C at night.

Q: How sunny is it in Grand Canyon in September?

There are normally 11 hours of bright sunshine each day in Grand Canyon in September - that's 88% of daylight hours.

Q: Does it ever rain in Grand Canyon in September?

There are usually 3 days with some rain in Grand Canyon in September and the average monthly rainfall is 23mm.

Expect daytime maximum temperatures of 82°F in Grand Canyon, Arizona in September based on long-term weather averages. There are 10 hours of sunshine per day on average.

82
82°F max day temperature
10
10 hours of sunshine per day
5
5 days with some rainfall
50
50°F min night temperature
12
12 hours of daylight per day
0
No heat & humidity
0.9
0.9 inches of monthly rainfall
8
8 (Very High) UV index

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The September weather guide for Arizona (Grand Canyon) 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)

More about Arizona

How hot is it in Grand Canyon in September?

Daytime temperatures usually reach 99°F in Grand Canyon in September with very high heat and humidity, falling to 70°F at night.

How sunny is it in Grand Canyon in September?

There are normally 11 hours of bright sunshine each day in Grand Canyon in September - that's 88% of daylight hours.

Does it ever rain in Grand Canyon in September?

There are usually 3 days with some rain in Grand Canyon in September and the average monthly rainfall is 0.9 inches.

Grand Canyon September sunrise & sunset times

Browse the sunrise and sunset times for Grand Canyon in September 2026. Select a month to view Grand Canyon sunrise and sunset times for the next 12 months.

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