Last updated: June 24, 2025
In Contra Costa Centre, United States, the average temperature in September hovers around 20°C (69°F), offering a pleasant climate. Expect a range where the minimum dips to 8°C (47°F), while the mercury can soar to a sizzling 42°C (107°F). With a meager precipitation of just 1 mm (0.0 in) over 0 days, enjoy low humidity levels at 55%, making it an ideal time to explore the outdoors!
In September in Contra Costa Centre, the average temperature is 20°C (69°F). The maximum can reach 42°C (107°F), while the minimum can drop to as low as 8°C (47°F). This variety in temperatures makes Contra Costa Centre an ideal destination for travelers seeking both warm days and cooler evenings.
In Contra Costa Centre in September, the precipitation amount is 1 mm (0.0 in) during a span of 0 days.
In Contra Costa Centre in September humidity is 55%. With an average temperature of 20°C (69°F), this humidity feels like a refreshing embrace, making it ideal for exploring the local sights while still requiring a light layer to stay comfortable.
In Contra Costa Centre 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 Contra Costa Centre.
UV Risk Categories
Weather in Contra Costa Centre varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Contra Costa Centre, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 10°C (50°F) | 99 mm (3.9 inches) | 82% | moderate |
| February Weather | 11°C (53°F) | 89 mm (3.5 inches) | 84% | moderate |
| March Weather | 13°C (55°F) | 72 mm (2.8 inches) | 82% | very high |
| April Weather | 15°C (59°F) | 31 mm (1.2 inches) | 78% | very high |
| May Weather | 17°C (63°F) | 16 mm (0.6 inches) | 71% | very high |
| June Weather | 20°C (68°F) | 1 mm (0.1 inches) | 64% | extreme |
| July Weather | 20°C (68°F) | 0 mm (0.0 inches) | 58% | extreme |
| August Weather | 20°C (69°F) | 0 mm (0.0 inches) | 54% | very high |
| September Weather | 20°C (69°F) | 1 mm (0.0 inches) | 55% | very high |
| October Weather | 18°C (64°F) | 23 mm (0.9 inches) | 62% | high |
| November Weather | 13°C (56°F) | 37 mm (1.5 inches) | 78% | moderate |
| December Weather | 10°C (50°F) | 75 mm (2.9 inches) | 80% | moderate |