September weather forecast
Dinosaur National Monument, UT

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A stone engraving of a dinosaur
A stone engraving of a dinosaur's head skull in the Dinosaur National Monument, Utah

Weather in September

September marks a phase of transition between summer and autumn for the Dinosaur National Monument, Utah, with the high temperatures gradually giving way to truer fall weather. A unique characteristic of this month is the sharp decrease in high temperatures to around 77.7°F (25.4°C), yet with rainfall not too different from August, recording 1.2" (30mm). A gradual shortening of daylight hours hints at the forthcoming winter. September serves as a serene time for outdoor activities amidst the changing colors of nature.

Temperature

As August shifts into September, a slight alteration in temperatures is observed, with average highs reducing from a tropical 88°F (31.1°C) to a warm 77.7°F (25.4°C). Dinosaur National Monument's temperature in September declines substantially from daytime highs, settling at a consistent average of 45.5°F (7.5°C) during the nights.

Rainfall

In Dinosaur National Monument, Utah, in September, 1.26" (32mm) of precipitation is typically accumulated. During the entire year, Dinosaur National Monument aggregates up to 11.61" (295mm) of precipitation.

Snowfall

Months with snowfall in Dinosaur National Monument are January through June, September through December. September is the first month it typically snows in Dinosaur National Monument. Throughout September, Dinosaur National Monument receives 0.2" (5mm) of snow. In Dinosaur National Monument, during the entire year, snow aggregates up to 40.91" (1039mm).

Daylight

The average length of the day in September is 12h and 27min.
On the first day of September in Dinosaur National Monument, Utah, sunrise is at 6:43 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 6:58 pm MDT.
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Frequently asked questions

What is the usual temperature for Dinosaur National Monument in September?

Dinosaur National Monument in September has an average high-temperature of 77.7°F (25.4°C) and an average low-temperature of 45.5°F (7.5°C).

How much does it rain in Dinosaur National Monument in September?

Throughout September, in Dinosaur National Monument, 1.26" (32mm) of precipitation is accumulated.

When does it start to snow in Dinosaur National Monument?

September is the first month it typically snows. Throughout September, Dinosaur National Monument receives 0.2" (5mm) of snow.

What is the average length of the day in September in Dinosaur National Monument?

The average day length in September in Dinosaur National Monument, Utah, is 12h and 27min.

When is the sunrise / sunset in September in Dinosaur National Monument?

On the first day of September in Dinosaur National Monument, sunrise is at 6:43 am and sunset at 7:47 pm. On the last day of the month, sunrise is at 7:12 am and sunset at 6:58 pm MDT.

Average temperature in September
Dinosaur National Monument, UT

Average temperature in September - Dinosaur National Monument, UT
  • Average high temperature in September: 77.7°F

The warmest month (with the highest average high temperature) is July (90.5°F).
The month with the lowest average high temperature is January (33°F).

  • Average low temperature in September: 45.5°F

The month with the highest average low temperature is July (56.6°F).
The coldest month (with the lowest average low temperature) is January (10.8°F).

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Average rainfall in September
Dinosaur National Monument, UT

Average rainfall in September - Dinosaur National Monument, UT
  • Average rainfall in September: 1.2"

The wettest month (with the highest rainfall) is October (1.5").
The driest months (with the least rainfall) are January, February and December (0.6").

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Average snowfall in September
Dinosaur National Monument, UT

Average snowfall in September - Dinosaur National Monument, UT
  • Average snowfall in September: 0.2"

The month with the highest snowfall is January (9.2").
The months with the least snowfall are July and August (0").

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Average daylight in September
Dinosaur National Monument, UT

Average daylight in September - Dinosaur National Monument, UT
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).

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Dinosaur National Monument, Utah, USA

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