Last updated: June 24, 2025
In September, the average temperature in Pleasant Hill, United States hovers around 21°C (69°F), creating a pleasant atmosphere for visitors. Temperatures can vary, dipping to a minimum of 5°C (41°F) and peaking at a maximum of 34°C (94°F). Expect around 86 mm (3.4 in) of precipitation spread over 7 days, contributing to an average humidity level of 73%.
In September in Pleasant Hill, the average temperature is 21°C (69°F), with maximums reaching 34°C (94°F) and minimums dropping as low as 5°C (41°F). This makes it a great time for travelers to enjoy a variety of outdoor activities while being prepared for some temperature fluctuations.
In Pleasant Hill in September, the total precipitation amount is 86 mm (3.4 in) over a span of 7 days.
In Pleasant Hill in September, humidity is 73%. With an average temperature of 21°C (69°F), this humidity feels like a warm, sticky embrace, making outdoor activities somewhat stifling and travel a bit more challenging, as the air is dense and can leave you feeling fatigued more quickly.
In Pleasant Hill 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 Pleasant Hill.
UV Risk Categories
Weather in Pleasant Hill varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Pleasant Hill, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -1°C (31°F) | 72 mm (2.8 inches) | 88% | moderate |
| February Weather | 1°C (34°F) | 97 mm (3.8 inches) | 88% | moderate |
| March Weather | 6°C (42°F) | 106 mm (4.2 inches) | 87% | high |
| April Weather | 11°C (52°F) | 98 mm (3.9 inches) | 85% | very high |
| May Weather | 18°C (64°F) | 129 mm (5.1 inches) | 81% | very high |
| June Weather | 22°C (72°F) | 120 mm (4.7 inches) | 82% | very high |
| July Weather | 24°C (76°F) | 100 mm (3.9 inches) | 81% | very high |
| August Weather | 23°C (74°F) | 90 mm (3.5 inches) | 73% | very high |
| September Weather | 21°C (69°F) | 86 mm (3.4 inches) | 73% | very high |
| October Weather | 14°C (58°F) | 99 mm (3.9 inches) | 78% | high |
| November Weather | 5°C (42°F) | 94 mm (3.7 inches) | 89% | moderate |
| December Weather | 2°C (36°F) | 87 mm (3.4 inches) | 87% | moderate |