Last updated: June 24, 2025
In September, the average temperature in Mountain Home, United States hovers around 24°C (75°F), creating a pleasant atmosphere for outdoor activities. Expect temperatures to range from a cool 9°C (48°F) to a warm 35°C (95°F). With an average humidity level of 64%, the air feels fairly comfortable. However, be prepared for some rain, as the area receives about 58 mm (2.3 in) of precipitation over 7 days.
In September in Mountain Home, the average temperature is 24°C (75°F), with maximums reaching 35°C (95°F) and minimums dropping to 9°C (48°F). This diverse temperature range makes it advisable for travelers to pack both light clothing for the warm days and warmer layers for the cooler evenings.
In Mountain Home in September, the precipitation amount is 58 mm (2.3 in) over the course of 7 days.
In Mountain Home in September humidity is 64%. With average temperature 24°C (75°F), this humidity feels like a warm blanket enveloping you, making outdoor exploration both refreshing and a little sticky, perfect for leisurely strolls and shaded cafes but with a need for frequent water breaks.
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 | 3°C (39°F) | 77 mm (3.0 inches) | 81% | moderate |
| February Weather | 5°C (41°F) | 107 mm (4.2 inches) | 78% | high |
| March Weather | 11°C (52°F) | 136 mm (5.4 inches) | 76% | high |
| April Weather | 14°C (58°F) | 137 mm (5.4 inches) | 78% | very high |
| May Weather | 20°C (68°F) | 167 mm (6.6 inches) | 83% | very high |
| June Weather | 25°C (77°F) | 82 mm (3.2 inches) | 83% | extreme |
| July Weather | 27°C (81°F) | 67 mm (2.7 inches) | 78% | extreme |
| August Weather | 26°C (79°F) | 104 mm (4.1 inches) | 68% | very high |
| September Weather | 24°C (75°F) | 58 mm (2.3 inches) | 64% | very high |
| October Weather | 16°C (62°F) | 100 mm (3.9 inches) | 70% | high |
| November Weather | 9°C (49°F) | 72 mm (2.9 inches) | 83% | moderate |
| December Weather | 7°C (44°F) | 83 mm (3.3 inches) | 87% | moderate |