Grand Canyon National Park
Arizona, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Grand Canyon National Park, AZ

A stunning aerial panorama on the famed Horseshoe bend at the iconic Grand Canyon National Park
A stunning aerial panorama on the famed Horseshoe bend at the iconic Grand Canyon National Park
September is one of the best times to visit Grand Canyon in the lovely fall season with mild temperatures and usually sunny skies. Average temperatures mostly range from 69.1°F (20.6°C) to 97°F (36.1°C) around the canyon.
The North Rim is the best place to view the magnificent landscape of mountains, valleys and gorges from the highest elevation of 2500 meters with the temperatures in the pleasant 39.9°F (4.4°C) to 70°F (21.1°C) range.
The summer crowds dwindle in September, and there is less competition for lodging and prime spots.

What is the temperature in September in Grand Canyon National Park?

In September, in Grand Canyon National Park, Arizona, the average high-temperature is 93°F (33.9°C), and the average low-temperature is 66°F (18.9°C).

How much does it rain in Grand Canyon National Park in September?

In Grand Canyon National Park, in September, during 3 rainfall days, 1" (25.9mm) of precipitation is typically accumulated.

How many hours of daylight does Grand Canyon National Park have in September?

The average length of the day in September in Grand Canyon National Park is 12.4h.

How many hours of sunshine does Grand Canyon National Park have in September?

In Grand Canyon National Park, the average sunshine in September is 10h.

What is the UV index intensity in September in Grand Canyon National Park?

The average daily maximum UV index in September is 8. A UV Index of 8 to 10 symbolizes a very high health threat from unsafe exposure to the Sun's UV rays.
Average temperature in September - Grand Canyon National Park, AZ
  • Average high temperature in September: 93°F

The warmest month (with the highest average high temperature) is July (104°F).
Months with the lowest average high temperature are January and December (55°F).

  • Average low temperature in September: 66°F

The month with the highest average low temperature is July (74°F).
The coldest month (with the lowest average low temperature) is January (35°F).

Average rainfall in September - Grand Canyon National Park, AZ
  • Average rainfall in September: 1"

The wettest month (with the highest rainfall) is August (1.5").
The driest month (with the lowest rainfall) is June (0.2").

Average rainfall days in September - Grand Canyon National Park, AZ
  • Average rainfall days in September: 3 days

The month with the highest number of rainy days is August (5 days).
Months with the lowest number of rainy days are May and June (1 days).

Average snowfall in September - Grand Canyon National Park, AZ
  • Average snowfall in September: 0"

Months with the highest snowfall are January and December (0.1").
Months with the lowest snowfall are February, March, April, May, June, July, August, September, October and November (0").

Average daylight in September / Average sunshine in September - Grand Canyon National Park, AZ
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.6h).
The month with shortest days is December (Average daylight: 9.7h).

  • Average sunshine in September: 10h

The month with most sunshine is June (Average sunshine: 13h).
Months with least sunshine are January and December (Average sunshine: 7).

Average UV index in September - Grand Canyon National Park, AZ
  • Average UV index in September: 8

Months with the highest UV index are June and July (UV index 11).
The month with the lowest UV index is December (UV index 2).