Last updated: June 24, 2025
In King William, United States, the average temperature in September hovers around 23°C (73°F), offering a pleasant climate for visitors and locals alike. However, temperatures can vary widely, dipping to a cool 9°C (49°F) at night and soaring to a hot 37°C (98°F) during the day. Expect about 100 mm (4.0 in) of precipitation spread over 11 days, contributing to an average humidity level of 78%. Pack accordingly!
In September in King William, the average temperature is 23°C (73°F). Maximums can reach up to 37°C (98°F), while minimums can drop to as low as 9°C (49°F). It's advisable to pack lightweight clothing for the warm afternoons and a light jacket for the cooler evenings when traveling.
In King William in September, the total precipitation amounts to 100 mm (4.0 in) over the course of 11 days.
In King William in September, humidity is 78%. With an average temperature of 23°C (73°F), this humidity feels like a warm, sticky embrace, making outdoor activities a little challenging but still enjoyable for travelers who appreciate a tropical atmosphere.
In King William 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 King William.
UV Risk Categories
Weather in King William varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in King William, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 4°C (40°F) | 69 mm (2.7 inches) | 84% | moderate |
| February Weather | 7°C (45°F) | 96 mm (3.8 inches) | 83% | high |
| March Weather | 10°C (50°F) | 84 mm (3.3 inches) | 82% | high |
| April Weather | 15°C (59°F) | 109 mm (4.3 inches) | 81% | very high |
| May Weather | 20°C (68°F) | 100 mm (3.9 inches) | 80% | very high |
| June Weather | 24°C (76°F) | 120 mm (4.7 inches) | 82% | very high |
| July Weather | 27°C (81°F) | 113 mm (4.4 inches) | 81% | very high |
| August Weather | 26°C (78°F) | 174 mm (6.8 inches) | 81% | very high |
| September Weather | 23°C (73°F) | 100 mm (4.0 inches) | 78% | very high |
| October Weather | 18°C (64°F) | 123 mm (4.8 inches) | 80% | high |
| November Weather | 10°C (50°F) | 77 mm (3.0 inches) | 84% | moderate |
| December Weather | 7°C (44°F) | 90 mm (3.5 inches) | 84% | moderate |