Last updated: June 24, 2025
In Rapid Valley, United States, the average temperature in September hovers around 16°C (62°F). However, be prepared for a temperature range that can dip to a brisk -4°C (26°F) and soar to a sweltering 37°C (100°F). During this month, expect about 43 mm (1.7 in) of precipitation spread over 7 days, with an average humidity of 76%, creating a uniquely varied climate experience.
In September in Rapid Valley, the average temperature is 16°C (62°F). Maximums can reach up to 37°C (100°F) and minimums can drop as low as -4°C (26°F). This means travelers should be prepared for a wide range of temperatures, making layered clothing essential for any outdoor activities.
In Rapid Valley in September, the total precipitation amount is 43 mm (1.7 in) spread over a period of 7 days.
In Rapid Valley in September, humidity is 76%. With an average temperature of 16°C (62°F), this humidity feels like a warm, enveloping blanket that makes exploring the outdoors feel both refreshing and slightly muggy, urging travelers to take breaks often and enjoy the shade.
In Rapid 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 Rapid Valley.
UV Risk Categories
Weather in Rapid Valley varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Rapid Valley, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -3°C (27°F) | 14 mm (0.5 inches) | 73% | moderate |
| February Weather | -6°C (22°F) | 27 mm (1.1 inches) | 78% | moderate |
| March Weather | 2°C (36°F) | 44 mm (1.7 inches) | 64% | high |
| April Weather | 5°C (41°F) | 73 mm (2.9 inches) | 66% | very high |
| May Weather | 11°C (53°F) | 112 mm (4.4 inches) | 74% | very high |
| June Weather | 19°C (67°F) | 72 mm (2.8 inches) | 84% | extreme |
| July Weather | 22°C (72°F) | 96 mm (3.8 inches) | 85% | extreme |
| August Weather | 20°C (69°F) | 57 mm (2.2 inches) | 85% | very high |
| September Weather | 16°C (62°F) | 43 mm (1.7 inches) | 76% | very high |
| October Weather | 7°C (45°F) | 52 mm (2.0 inches) | 71% | moderate |
| November Weather | 3°C (37°F) | 17 mm (0.7 inches) | 73% | moderate |
| December Weather | -1°C (30°F) | 28 mm (1.1 inches) | 75% | low |