September weather forecast
Capitol Reef National Park, UT

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Natural sandstone formation in the Cathedral Wash, within the Capitol Reef National Park, Utah
Natural sandstone formation in the Cathedral Wash, within the Capitol Reef National Park, Utah

Weather in September

As September rolls in, Capitol Reef National Park undergoes an atmospheric change. The retreat of summer is most evident in temperatures, which fall between 41°F (5°C) and 75°F (23.9°C). This marks the start of the cooler season and a decline in the UV index to 8. Autumn's advent colors the landscape in beautiful hues, awakening the romance of the season. There is sustained rainfall, accounting for 0.9" (23mm) over six days, maintaining the tradition of a subtly wet September.

Temperature

September in Capitol Reef National Park signals a slight drop in average high-temperature, sliding from August's 82.4°F (28°C) to a still moderately hot 75.2°F (24°C). Capitol Reef National Park sees a major change from daytime highs, with the nighttime temperature dipping to an icy 41°F (5°C) on average during September.

Rainfall

In Capitol Reef National Park, during September, the rain falls for 6 days and regularly aggregates up to 0.94" (24mm) of precipitation. Throughout the year, in Capitol Reef National Park, Utah, there are 79 rainfall days, and 7.99" (203mm) of precipitation is accumulated.

Daylight

The average length of the day in September is 12h and 25min.
On the first day of September, sunrise is at 6:55 am and sunset at 7:54 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 7:08 pm MDT.

Sunshine

In September, the average sunshine is 10h.

UV index

In September, the average daily maximum UV index is 8. A UV Index of 8 to 10 symbolizes a very high health vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: In September, the maximum UV index of 8 suggests these recommendations:
Take special precautions, as unprotected eyes and skin can be burned and damaged quickly. Avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is most intense, and remember that not all shade structures provide full protection. Always opt for UVA and UVB-resistant sunglasses on radiant days.
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Frequently asked questions

What are September temperatures in Capitol Reef National Park?

The high-temperature, in September, in Capitol Reef National Park, records 75.2°F (24°C), while the low-temperature is 41°F (5°C).

How many days does it rain in September in Capitol Reef National Park?

In Capitol Reef National Park, Utah, during September, the rain falls for 6 days and regularly aggregates up to 0.94" (24mm) of precipitation.

What is the average length of the day in September in Capitol Reef National Park?

In Capitol Reef National Park, the average day length in September is 12h and 25min.

When are sunrise and sunset in September in Capitol Reef National Park?

In September, on the first day of the month, sunrise is at 6:55 am and sunset at 7:54 pm. On the last day of the month, in Capitol Reef National Park, sunrise is at 7:20 am and sunset at 7:08 pm MDT.

How long on average sun shines in September in Capitol Reef National Park?

The average sunshine duration in September is 10h.

What is the UV index intensity in September in Capitol Reef National Park?

The average daily maximum UV index in September in Capitol Reef National Park, Utah, is 8. A UV Index reading of 8 to 10 represents a very high health risk from exposure to Sun's UV rays.
Average low temperature
Average rainfall days
Average daylight
Average sunshine
Average UV index

Average temperature in September
Capitol Reef National Park, UT

Average temperature in September - Capitol Reef National Park, UT
  • Average high temperature in September: 75°F

The warmest month (with the highest average high temperature) is July (86°F).
The month with the lowest average high temperature is January (37°F).

  • Average low temperature in September: 41°F

The month with the highest average low temperature is July (52°F).
The coldest month (with the lowest average low temperature) is January (9°F).

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Average rainfall in September
Capitol Reef National Park, UT

Average rainfall in September - Capitol Reef National Park, UT
  • Average rainfall in September: 0.9"

The wettest month (with the highest rainfall) is August (1.4").
The driest months (with the least rainfall) are February and April (0.4").

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Average rainfall days in September
Capitol Reef National Park, UT

Average rainfall days in September - Capitol Reef National Park, UT
  • Average rainfall days in September: 6 days

The months with the highest number of rainy days are March and August (8 days).
The month with the least rainy days is June (5 days).

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Average daylight in September /
Average sunshine in September
Capitol Reef National Park, UT

Average daylight in September / Average sunshine in September - Capitol Reef National Park, UT
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in September: 10h

The month with the most sunshine is June (Average sunshine: 12h).
The months with the least sunshine are January and December (Average sunshine: 6h).

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Average UV index in September
Capitol Reef National Park, UT

Average UV index in September - Capitol Reef National Park, UT
  • Average UV index in September: 8

The months with the highest UV index are June and July (UV index 11).
The months with the lowest UV index are January and December (UV index 2).

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Capitol Reef National Park, Utah, USA

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