September weather forecast
Saint George, UT

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Weather in September

September experiences a drop in temperature, marking the onset of fall in Saint George. The weather characteristics associated with high temperatures begin to tone down, giving way to mildly warm days and much cooler nights. It's also the phase which brings back the breeze, post the hot and high-temperature summer.

Temperature

September's arrival in Saint George signals a moderate reduction in the average high-temperature, easing from a hot 92.3°F (33.5°C) in August to a moderately hot 85.1°F (29.5°C). Saint George in September anticipates an average nighttime temperature of 64.6°F (18.1°C).

Humidity

In Saint George, the average relative humidity in September is 29%.

Rainfall

In Saint George, in September, during 4.9 rainfall days, 0.35" (9mm) of precipitation is typically accumulated. In Saint George, during the entire year, the rain falls for 66.6 days and collects up to 6.97" (177mm) of precipitation.

Snowfall

March through October are months without snowfall in Saint George.

Daylight

In September, the average length of the day in Saint George is 12h and 24min.
On the first day of September in Saint George, sunrise is at 7:05 am and sunset at 8:02 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 7:18 pm MDT.

Sunshine

The average sunshine in September in Saint George is 9.9h.

UV index

The average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from unsafe exposure to UV radiation for average individuals.
Note: The daily maximum UV index of 6 in September interprets into the following advice:
Inhibit overexposure. Warding off sun damage is of utmost importance. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
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Frequently asked questions

How hot is it in Saint George in September?

The high-temperature, in September, in Saint George, is 85.1°F (29.5°C), while the low-temperature averages to 64.6°F (18.1°C).

What is the average humidity in September in Saint George?

In September, the average relative humidity in Saint George is 29%.

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

In Saint George, Utah, during September, the rain falls for 4.9 days and regularly aggregates up to 0.35" (9mm) of precipitation.

When it does not snow in Saint George?

March through October are months without snowfall in Saint George.

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

In September, the average day length in Saint George is 12h and 24min.

When is the sunrise / sunset in September in Saint George?

On the first day of September, sunrise is at 7:05 am and sunset at 8:02 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 7:18 pm MDT.

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

In Saint George, the average sunshine duration in September is 9.9h.

What is the UV index reading in September in Saint George?

In September, the average daily maximum UV index in Saint George, Utah, is 6. A UV Index value of 6 to 7 symbolizes a high health threat from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Saint George, UT

Average temperature in September - Saint George, UT
  • Average high temperature in September: 85.1°F

The warmest month (with the highest average high temperature) is July (93.9°F).
The month with the lowest average high temperature is December (47.7°F).

  • Average low temperature in September: 64.6°F

The month with the highest average low temperature is July (72.3°F).
The coldest month (with the lowest average low temperature) is December (31.6°F).

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Average pressure in September
Saint George, UT

Average pressure in September - Saint George, UT
  • Average pressure in September: 29.92"Hg

The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is June (29.83"Hg).

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Average wind speed in September
Saint George, UT

Average wind speed in September - Saint George, UT
  • Average wind speed in September: 5.6mph

The windiest month (with the highest average wind speed) is April (7.3mph).
The calmest months (with the lowest average wind speed) are August and December (5.3mph).

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Average humidity in September
Saint George, UT

Average humidity in September - Saint George, UT
  • Average humidity in September: 29%

The month with the highest relative humidity is January (59%).
The month with the lowest relative humidity is June (18%).

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Average rainfall in September
Saint George, UT

Average rainfall in September - Saint George, UT
  • Average rainfall in September: 0.35"

The wettest month (with the highest rainfall) is March (0.98").
The driest month (with the least rainfall) is June (0.12").

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Average rainfall days in September
Saint George, UT

Average rainfall days in September - Saint George, UT
  • Average rainfall days in September: 4.9 days

The month with the highest number of rainy days is March (8.3 days).
The month with the least rainy days is June (1.8 days).

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Average snowfall in September
Saint George, UT

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

The month with the highest snowfall is February (0.2").
The months with the least snowfall are March, April, May, June, July, August, September and October (0").

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Average snowfall days in September
Saint George, UT

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

The month with the highest number of snowfall days is December (0.8 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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Average daylight in September /
Average sunshine in September
Saint George, UT

Average daylight in September / Average sunshine in September - Saint George, UT
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 42min).

  • Average sunshine in September: 9h and 5min

The months with the most sunshine are June and July (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 7h and 0min).

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Average sunshine days in September
Saint George, UT

Average sunshine days in September - Saint George, UT
  • Average sunshine days in September: 21.5 days

The month with the most sunshine days is June (26.3 days).
The month with the least sunshine days is July (17.9 days).

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Average UV index in September
Saint George, UT

Average UV index in September - Saint George, UT
  • Average UV index in September: 6

The months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 2).

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Average cloud cover in September
Saint George, UT

Average cloud cover in September - Saint George, UT
  • Average cloud cover in September: 8

The month with the most cloud cover is December (Cloud cover 21).
The month with the least cloud cover is June (Cloud cover 6).

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Average visibility in September
Saint George, UT

Average visibility in September - Saint George, UT
  • Average visibility in September: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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Saint George, Utah, USA

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