United StatesAverage weather for St. George in September
It's hot in September in St. George with an average temperature of 33°C. Temperatures this month range from a low of 26°C to a high of 38°C. At night, you can expect temperatures between 12°C and 23°C.
Start of September
The month of September starts in St. George with hot temps, averaging around 36°C during the day and nights around 22°C. There’s little chance of precipitation. The weather’s mostly sunny and dry. Light clothing like shorts or a dress, and a hat and sunglasses are perfect.
Mid September
By mid-September, daytime temps drop to around 34°C, with nights around 19°C. Not much precipitation expected during this period. It’s mostly dry and sunny.
End of September
By the end of September, the average daytime temperature in St. George is around 30°C, while nighttime temps are about 15°C. There’s hardly any chance of precipitation. The weather will be mostly dry with plenty of sun.
Because temperatures drop in the evening, wearing layers is recommended.
In September, there is an average of 22 mm of precipitation, spread over 2 days. The wind speed is around 4 Bft, mostly coming from the South.
St. George in September |
New York | ||
|---|---|---|---|
 Average temperature |
33°C | 27°C | |
 Max. temperature |
38°C | 31°C | |
| Min. temperature |
26°C | -5°C | |
 Total precipitation |
22 mm | 57 mm | |
| Rainy days |
2 days | 9 days | |
August
UV index
The UV index is a maximum of 8 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Is September a good time to visit St. George?
September is a good month to be in St. George for sunny weather. You’ll have high temperatures and not too much rain.
Temperature records
With 44°C in 2022, St. George reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 19°C in 2017. The extreme nighttime temperatures ranged from a lowest recorded value of 1°C to a highest value of 27°C.
Check out the climate of St. George for all months and discover the best travel time
Daily Temperature in September in St. George
This chart shows the average daily high and low temperatures in September for St. George, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in September in St. George
The chart below shows the average daily precipitation in September for St. George, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for September, you can expect about 2 days of precipitation in St. George.
Daily UV index in September in St. George
This chart shows the average daily UV index in September in St. George, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in September in St. George over the years
This chart shows the average temperature in September in St. George, measured in degrees Celsius, over the past few years.
Total precipitation in September in St. George over the years
This chart shows the average precipitation in September in St. George, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily weather in September for St. George
Click on any day in September to get detailed info about the usual weather on that day in St. George. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in St. George
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Average weather in St. George by month
Click on a month below to see detailed weather info for St. George. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of St. George for all months at once
