St. George Weather in September
September in St. George typically sees daytime highs of 33°C (91°F) and nighttime lows of 18°C (64°F). Expect some rainfall during the month.
Rainfall in St. George in September
Typically around 4 days of rainfall are expected, averaging 24 mm (0.9 in) for the month. Rain is scarce this month and when it does fall, it tends to be light. Unlikely to disrupt plans significantly.
Temperature in St. George in September
The perfect temperature in St. George in September makes it a solid month to visit, with 33°C (91°F) during the day and 18°C (64°F) at night. It's usually most comfortable outside during the morning and later in the day. Nights cool down to 18°C (64°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.If you prefer enjoying temperate temperatures and rain-free days, March, April, May, October and November typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our St. George's climate page.
St. George Temperature in September
Min Temperature
18°C (64°F)
Max Temperature
33°C (91°F)
Chance of Rain
13%
Precipitation
24 mm (0.9 in)
Rainy days
4 days
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in St. George typically drop from around 34°C (93°F) at the start of September to approximately 29°C (84°F) by the end. Nights are pleasant, with lows typically ranging from 12°C (54°F) to 18°C (64°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for St. George in September
Browse day-by-day weather records for St. George spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
St. George historical weather extremes in September
Based on weather observations in St. George between 1976 and 2025, these are the recorded extremes during September.
- The warmest day in September was on September 6, 2022, with a maximum of 44°C (111°F).
Best Places in the United States of America in September
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in September →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in St. George in September
Get ready for hot weather in September! Lightweight, breathable fabrics are your best friend during this month. Cotton and linen shirts, shorts, sundresses, and sandals will keep you comfortable. Light colors help reflect the heat, avoid wearing black. Some rain is possible, so pack something to handle light showers.What To Do in St. George in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our St. George's climate page.
See the full St. George climate overview or explore weather in the United States of America.
