Saint George
Utah, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Saint George, UT

September, the first month of the autumn, in Saint George, is also a moderately hot month, with average temperature varying between 64.6°F (18.1°C) and 85.1°F (29.5°C).

Temperature

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

Humidity

In Saint George, Utah, the average relative humidity in September 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. In Saint George, during the entire year, the rain falls for 66.6 days and collects up to 6.97" (177mm) of precipitation.

Snowfall

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

Daylight

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

Sunshine

In September, the average sunshine is 9.9h.

UV index

In Saint George, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from the exposure to the Sun's UV rays for average individuals.
Note: In September, the average maximum UV index of 6 translate into the following recommendations:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. 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.

What is the temperature in September in Saint George?

In Saint George, in September, the average high-temperature is 85.1°F (29.5°C), and the average low-temperature is 64.6°F (18.1°C).

What is the average humidity in September in Saint George?

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

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

In Saint George, Utah, in September, during 4.9 rainfall days, 0.35" (9mm) of precipitation is typically accumulated.

When it does not snow in Saint George?

March through October are months without snowfall.

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

In September, the average length of the day is 12.4h.

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

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

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

In Saint George, Utah, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health threat from unsafe exposure to the Sun's UV rays.
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).

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%).

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 lowest rainfall) is June (0.12").

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 lowest number of rainy days is June (1.8 days).

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

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

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).
Months with the lowest number of snowfall days are April, 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: 9.9h

Months with most sunshine are June and July (Average sunshine: 11.9h).
The month with least sunshine is December (Average sunshine: 7h).

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

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).