Last updated: June 24, 2025
In September, the average temperature in Apple Valley, United States hovers around 20°C (68°F), offering a pleasant climate for outdoor activities. However, temperatures can fluctuate, with a minimum of 5°C (41°F) and a maximum of 34°C (93°F). Be prepared for some rain, as precipitation amounts to 90 mm (3.6 in) over approximately 10 days. With an average humidity of 77%, the air can feel quite muggy, making it a great time to enjoy refreshing drinks and breezy settings!
In September in Apple Valley, the average temperature is 20°C (68°F). Maximums can reach 34°C (93°F) and minimums can be as low as 5°C (41°F). Travelers should be prepared for warm days and cool nights, making layering essentials for this time of year.
In Apple Valley in September, the precipitation amount is 90 mm (3.6 in) spread over the course of 10 days.
In Apple Valley in September, humidity is 77%. With an average temperature of 20°C (68°F), this humidity feels like a warm, sticky embrace, making it essential for travelers to stay hydrated and take breaks in shaded areas to avoid feeling sluggish in the heat.
In Apple Valley in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Apple Valley.
UV Risk Categories
Weather in Apple Valley varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Apple Valley, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -1°C (30°F) | 82 mm (3.2 inches) | 88% | moderate |
| February Weather | 1°C (33°F) | 100 mm (3.9 inches) | 88% | moderate |
| March Weather | 5°C (41°F) | 105 mm (4.1 inches) | 87% | high |
| April Weather | 11°C (51°F) | 132 mm (5.2 inches) | 87% | very high |
| May Weather | 17°C (63°F) | 120 mm (4.7 inches) | 81% | very high |
| June Weather | 22°C (71°F) | 126 mm (5.0 inches) | 83% | very high |
| July Weather | 24°C (75°F) | 113 mm (4.5 inches) | 82% | very high |
| August Weather | 23°C (73°F) | 80 mm (3.1 inches) | 76% | very high |
| September Weather | 20°C (68°F) | 90 mm (3.6 inches) | 77% | very high |
| October Weather | 14°C (57°F) | 102 mm (4.0 inches) | 82% | high |
| November Weather | 5°C (42°F) | 93 mm (3.7 inches) | 89% | moderate |
| December Weather | 2°C (36°F) | 95 mm (3.7 inches) | 86% | low |