Last updated: June 24, 2025
In Half Moon, United States, the average temperature in September hovers around 24°C (76°F), with a comfortable range from a minimum of 10°C (50°F) to a maximum of 35°C (95°F). During this month, expect about 224 mm (8.8 in) of precipitation spread over 13 days, contributing to an average humidity level of 79%. Plan accordingly to make the most of your visit!
In September in Half Moon, the average temperature is 24°C (76°F). The maximum can reach 35°C (95°F), while the minimum can be as low as 10°C (50°F). Be prepared for warm days and cooler nights when traveling during this time.
In Half Moon in September, the precipitation amount is 224 mm (8.8 in) spread over 13 days.
In Half Moon in September, humidity is 79%. With an average temperature of 24°C (76°F), this humidity feels like a thick blanket wrapped around you, making traveling somewhat uncomfortable and sticky, as you navigate through the warmth while constantly seeking shade and hydration.
In Half Moon 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 Half Moon.
UV Risk Categories
Weather in Half Moon varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Half Moon, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 8°C (47°F) | 73 mm (2.9 inches) | 85% | moderate |
| February Weather | 11°C (52°F) | 98 mm (3.8 inches) | 82% | high |
| March Weather | 13°C (55°F) | 67 mm (2.6 inches) | 81% | very high |
| April Weather | 17°C (63°F) | 114 mm (4.5 inches) | 80% | very high |
| May Weather | 22°C (72°F) | 122 mm (4.8 inches) | 81% | extreme |
| June Weather | 25°C (77°F) | 191 mm (7.5 inches) | 81% | extreme |
| July Weather | 27°C (80°F) | 176 mm (6.9 inches) | 81% | extreme |
| August Weather | 26°C (79°F) | 215 mm (8.5 inches) | 80% | very high |
| September Weather | 24°C (76°F) | 224 mm (8.8 inches) | 79% | very high |
| October Weather | 20°C (68°F) | 69 mm (2.7 inches) | 80% | very high |
| November Weather | 13°C (55°F) | 110 mm (4.3 inches) | 85% | high |
| December Weather | 10°C (50°F) | 116 mm (4.6 inches) | 86% | moderate |