September weather forecast
Saint George, UT

Weather in September

The first month of the autumn, September, is also a moderately hot month in Saint George, Utah, with temperature in the range of an average high of 85.1°F (29.5°C) and an average low of 64.6°F (18.1°C).

Temperature

In September, the average high-temperature slightly decreases from a tropical 92.3°F (33.5°C) in August to a moderately hot 85.1°F (29.5°C). In September, in Saint George, Utah, the average low-temperature is 64.6°F (18.1°C).

Humidity

In September, the average relative humidity is 29%.

Rainfall

In Saint George, during September, the rain falls for 4.9 days and regularly aggregates up to 0.35" (9mm) of precipitation. Throughout the year, in Saint George, Utah, there are 66.6 rainfall days, and 6.97" (177mm) of precipitation is accumulated.

Snowfall

In Saint George, snow does not fall in March through October.

Daylight

The average length of the day in September in Saint George, Utah, is 12h and 24min.
On the first day of September in Saint George, sunrise is at 7:05 am and sunset at 8:03 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 7:19 pm MDT.

Sunshine

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

UV index

In Saint George, the average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: In September, the average maximum UV index of 6 translate into the following recommendations:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. 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.
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FAQ

What is the average humidity in September in Saint George?

The average relative humidity in September in Saint George, Utah, is 29%.

How much does it rain in Saint George in September?

In September, in Saint George, Utah, the rain falls for 4.9 days. Throughout September, 0.35" (9mm) of precipitation is accumulated.

When it does not snow in Saint George?

March through October are months without snowfall in Saint George.

What is the average length of the day in September in Saint George?

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

What time are sunrise and sunset in September in Saint George?

On the first day of September in Saint George, sunrise is at 7:05 am and sunset at 8:03 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 7:19 pm MDT.

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

The average sunshine duration in September in Saint George, Utah, is 9.9h.

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

In September, the average daily maximum UV index is 6. A UV Index estimate of 6 to 7 represents a high hazard to health from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
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 24min

The month with the longest days is June (Average daylight: 14h and 40min).
The month with the shortest days is December (Average daylight: 9h and 40min).

  • Average sunshine in September: 9h and 54min

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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