September weather forecast and climate
Saint George, UT

The first month of the autumn, September, is also a hot month in Saint George, Utah, with average temperature varying between 91.8°F (33.2°C) and 63.1°F (17.3°C).

Temperature

In September, the average high-temperature is 91.8°F (33.2°C), and the average low-temperature is 63.1°F (17.3°C).

Rainfall

In September, in Saint George, Utah, the rain falls for 2.6 days. Throughout September, 0.6" (14.5mm) of precipitation is accumulated. In Saint George, during the entire year, the rain falls for 44.6 days and collects up to 8.8" (223.6mm) of precipitation.

Snowfall

Throughout the year, 1.4" (35.5mm) of snow is accumulated.

Daylight

The average length of the day is 12.4h.

Sunshine

In September, the average sunshine is 11h.

UV index

In Saint George, Utah, the average daily maximum UV index in September is 8. A UV Index of 8 to 10 symbolizes a very high health risk from unsafe exposure to the UV radiation for the ordinary person.
The daily maximum UV index of 8 in September interpret into the following advice:
Take extra precautions. Fair-skinned individuals may get burned in less than 10 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

What is the temperature in September in Saint George?

In Saint George, Utah, in September, the average high-temperature is 91.8°F (33.2°C), and the average low-temperature is 63.1°F (17.3°C).

How many days does it rain in September in Saint George?

In Saint George, in September, during 2.6 rainfall days, 0.6" (14.5mm) of precipitation is typically accumulated.

How many hours of daylight does Saint George have in September?

In September, the average length of the day in Saint George, Utah, is 12.4h.

How long on average sun shines in September in Saint George?

The average sunshine in September is 11h.

How high is the UV index in September in Saint George?

In September, the average daily maximum UV index in Saint George, Utah, is 8. A UV Index reading of 8 to 10 represents a very high hazard to health from unsafe exposure to the Sun's UV rays.
Average temperature in September - Saint George, UT
  • Average high temperature in September: 91.7°F

The warmest month (with the highest average high temperature) is July (101.4°F).
The month with the lowest average high temperature is December (51.9°F).

  • Average low temperature in September: 63.2°F

The month with the highest average low temperature is July (74.5°F).
The coldest month (with the lowest average low temperature) is December (30.6°F).

Average rainfall in September - Saint George, UT
  • Average rainfall in September: 0.6"

The wettest month (with the highest rainfall) is January (1.4").
Driest months (with the lowest rainfall) are May and June (0.2").

Average rainfall days in September - Saint George, UT
  • Average rainfall days in September: 2.6 days

The month with the highest number of rainy days is February (6.1 days).
The month with the lowest number of rainy days is June (1.5 days).

Average snowfall in September - Saint George, UT
  • Average snowfall in September: 0"

The month with the highest snowfall is January (0.7").
Months with the lowest snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in September - Saint George, UT
  • Average snowfall days in September: 0 days

Months with the highest number of snowfall days are January, February and December (0.2 days).
Months with the lowest number of snowfall days are May, June, July, August, September and October (0 days).

Average daylight in September / Average sunshine in September - Saint George, UT
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.7h).
The month with shortest days is December (Average daylight: 9.7h).

  • Average sunshine in September: 11h

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 - Saint George, UT
  • Average UV index in September: 8

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

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