Last updated: June 24, 2025
In September, the average temperature in Mountain Home, United States is a delightful 21°C (69°F), creating a pleasant atmosphere for both locals and visitors. Temperatures can range from a cool 6°C (43°F) to a warm 32°C (90°F). Expect about 149 mm (5.9 in) of precipitation spread over 10 days, contributing to the region’s lush scenery. With an average humidity of 76%, the air feels comfortably moist, perfect for enjoying the vibrant surroundings.
In September in Mountain Home, the average temperature is 21°C (69°F). Maximum temperatures can reach 32°C (90°F), and minimums can drop as low as 6°C (43°F). This range of temperatures makes it an excellent time for travelers to explore Mountain Home, whether they prefer warm afternoons or cooler evenings.
In Mountain Home in September, the total precipitation amount is 149 mm (5.9 in) spread over 10 days.
In Mountain Home in September, humidity is 76%. With an average temperature of 21°C (69°F), this humidity feels like a warm, enveloping blanket, making travel slightly uncomfortable and creating a sticky atmosphere that can sap your energy as you explore.
In Mountain Home in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Mountain Home.
UV Risk Categories
Weather in Mountain Home varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Mountain Home, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 4°C (40°F) | 104 mm (4.1 inches) | 86% | moderate |
| February Weather | 7°C (45°F) | 132 mm (5.2 inches) | 86% | high |
| March Weather | 10°C (50°F) | 103 mm (4.0 inches) | 86% | very high |
| April Weather | 14°C (57°F) | 139 mm (5.5 inches) | 82% | very high |
| May Weather | 18°C (65°F) | 141 mm (5.5 inches) | 85% | extreme |
| June Weather | 22°C (71°F) | 99 mm (3.9 inches) | 85% | extreme |
| July Weather | 23°C (74°F) | 115 mm (4.5 inches) | 83% | extreme |
| August Weather | 23°C (73°F) | 145 mm (5.7 inches) | 76% | very high |
| September Weather | 21°C (69°F) | 149 mm (5.9 inches) | 76% | very high |
| October Weather | 16°C (61°F) | 174 mm (6.8 inches) | 80% | very high |
| November Weather | 8°C (47°F) | 89 mm (3.5 inches) | 88% | high |
| December Weather | 6°C (43°F) | 133 mm (5.2 inches) | 88% | moderate |