September weather forecast and climate
Arches National Park, UT

Beautiful rock formation in the famous Delicate Arch within the Arches National Park in Utah, USA
Beautiful rock formation in the famous Delicate Arch within the Arches National Park in Utah, USA
September has average temperatures between 55°F (12.8°C) to 88°F (31.1°C) in Arches National Park with the heat gradually decreasing by the mid of the month. The daylight is still 13 hours, with the sunset occurring almost at 8 p.m.
The afternoon thunderstorms arise less frequently in September, which registers approximately 0.8" (20.3mm) of rainfall. The park sees crowds as the conditions moderate with the arrival of the fall season.
Early morning explorations give a great start to the day, and if lucky, there is a chance to cross paths with several desert animals scurrying to gather food.
Average temperature in September - Arches National Park, UT
  • Average high temperature in September: 88°F

The warmest month (with the highest average high temperature) is July (100°F).
The month with the lowest average high temperature is January (44°F).

  • Average low temperature in September: 55°F

The month with the highest average low temperature is July (67°F).
The coldest month (with the lowest average low temperature) is January (22°F).

Average rainfall in September - Arches National Park, UT
  • Average rainfall in September: 0.8"

The wettest month (with the highest rainfall) is October (1.2").
The driest month (with the lowest rainfall) is June (0.4").

Average rainfall days in September - Arches National Park, UT
  • Average rainfall days in September: 5.2 days

The month with the highest number of rainy days is August (6.6 days).
The month with the lowest number of rainy days is June (3.1 days).

Average snowfall in September - Arches National Park, UT
  • Average snowfall in September: 0"

The month with the highest snowfall is December (2.5").
Months with the lowest snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in September - Arches National Park, UT
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is December (1.4 days).
Months with the lowest number of snowfall days are April, May, June, July, August, September and October (0 days).

Average daylight in September - Arches National Park, UT
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.8h).
The month with shortest days is December (Average daylight: 9.5h).

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