Last updated: June 24, 2025
In September, the average temperature in Sheridan, United States hovers around 13°C (56°F). While you may experience chilly lows of -7°C (20°F), the mercury can soar to a warm 34°C (93°F) on those rare sunny days. Expect about 57 mm (2.2 in) of precipitation spread over 8 days throughout the month, and brace for an average humidity level of 79%, making it a time for cozy sweaters and warm drinks!
In September in Sheridan, the average temperature is 13°C (56°F). Maximum temperatures can reach 34°C (93°F), while minimums can drop as low as -7°C (20°F). Be prepared for a wide range of temperatures to ensure a comfortable and enjoyable travel experience.
In Sheridan in September, the precipitation amount is 57 mm (2.2 in) over the course of 8 days.
In Sheridan in September, humidity is 79%. With an average temperature of 13°C (56°F), this humidity feels like a damp, cool blanket wrapping around you, making traveling slightly uncomfortable and requiring you to dress in layers to stay comfortable while exploring.
In Sheridan 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 Sheridan.
UV Risk Categories
Weather in Sheridan varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Sheridan, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -5°C (23°F) | 27 mm (1.1 inches) | 78% | moderate |
| February Weather | -8°C (19°F) | 45 mm (1.8 inches) | 79% | moderate |
| March Weather | 0°C (32°F) | 61 mm (2.4 inches) | 71% | high |
| April Weather | 3°C (37°F) | 95 mm (3.7 inches) | 70% | very high |
| May Weather | 9°C (48°F) | 101 mm (4.0 inches) | 75% | very high |
| June Weather | 15°C (60°F) | 72 mm (2.8 inches) | 82% | extreme |
| July Weather | 19°C (67°F) | 50 mm (2.0 inches) | 84% | extreme |
| August Weather | 18°C (64°F) | 50 mm (2.0 inches) | 85% | very high |
| September Weather | 13°C (56°F) | 57 mm (2.2 inches) | 79% | very high |
| October Weather | 4°C (40°F) | 73 mm (2.9 inches) | 75% | high |
| November Weather | 0°C (32°F) | 40 mm (1.6 inches) | 75% | moderate |
| December Weather | -4°C (26°F) | 33 mm (1.3 inches) | 81% | low |