Last updated: June 24, 2025
In Spring Valley, United States, the average temperature in September hovers around 20°C (69°F). Daily highs can reach a scorching 35°C (95°F), while chilly nights can drop to a brisk 4°C (40°F). Expect about 83 mm (3.3 in) of rain spread over 8 days, contributing to an average humidity of 80%. Whether you're exploring sunny skies or cozying up during a rain shower, September offers a dynamic climate that captivates all!
In September in Spring Valley, the average temperature is 20°C (69°F). Maximums can reach 35°C (95°F), and minimums can be as low as 4°C (40°F). This weather makes Spring Valley an ideal destination for travelers seeking both warmth and cool, refreshing evenings.
In Spring Valley in September, the precipitation amount reaches 83 mm (3.3 in) over the course of 8 days.
In Spring Valley in September, humidity is 80%. With an average temperature of 20°C (69°F), this humidity feels like a warm blanket enveloping you, making every step slightly more challenging as you navigate the air that clings to your skin, often leaving you longing for a cool breeze while exploring the sights.
In Spring 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 Spring Valley.
UV Risk Categories
Weather in Spring Valley varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Spring Valley, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -4°C (26°F) | 58 mm (2.3 inches) | 82% | moderate |
| February Weather | -2°C (28°F) | 64 mm (2.5 inches) | 83% | moderate |
| March Weather | 5°C (41°F) | 93 mm (3.7 inches) | 84% | high |
| April Weather | 10°C (50°F) | 114 mm (4.5 inches) | 85% | very high |
| May Weather | 17°C (63°F) | 160 mm (6.3 inches) | 79% | very high |
| June Weather | 23°C (74°F) | 152 mm (6.0 inches) | 82% | extreme |
| July Weather | 25°C (76°F) | 105 mm (4.1 inches) | 80% | very high |
| August Weather | 23°C (74°F) | 76 mm (3.0 inches) | 81% | very high |
| September Weather | 20°C (69°F) | 83 mm (3.3 inches) | 80% | very high |
| October Weather | 13°C (55°F) | 134 mm (5.3 inches) | 82% | high |
| November Weather | 4°C (40°F) | 54 mm (2.1 inches) | 88% | moderate |
| December Weather | 1°C (33°F) | 51 mm (2.0 inches) | 84% | low |