Last updated: June 24, 2025
In Oakland, United States, the average temperature in September hovers around 20°C (68°F), with temperatures ranging from a chilly 5°C (42°F) to a warm 34°C (93°F). During this month, expect about 114 mm (4.5 in) of precipitation spread across 11 days, and enjoy a comfortable average humidity level of 68%.
In September in Oakland, the average temperature is 20°C (68°F). Maximum can reach 34°C (93°F) and minimum can be as low as 5°C (42°F). Pack accordingly to enjoy a comfortable and pleasant trip!
In Oakland in September, the total precipitation amount is 114 mm (4.5 in) spread over 11 days.
In Oakland in September humidity is 68%. With an average temperature of 20°C (68°F), this humidity feels like a warm embrace, making it ideal for leisurely strolls while also prompting travelers to stay hydrated and seek out refreshing breaks from the heat.
In Oakland 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 Oakland.
UV Risk Categories
Weather in Oakland varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Oakland, focusing on differences in temperature, rainfall, humidity, and UV levels.
Temperature | Precipitation | Humidity | UV | |
---|---|---|---|---|
January Weather | 0°C (32°F) | 70 mm (2.8 inches) | 84% | moderate |
February Weather | 2°C (35°F) | 99 mm (3.9 inches) | 82% | moderate |
March Weather | 4°C (40°F) | 95 mm (3.8 inches) | 81% | high |
April Weather | 10°C (51°F) | 118 mm (4.7 inches) | 78% | very high |
May Weather | 16°C (61°F) | 130 mm (5.1 inches) | 69% | very high |
June Weather | 21°C (70°F) | 99 mm (3.9 inches) | 69% | very high |
July Weather | 24°C (76°F) | 147 mm (5.8 inches) | 62% | very high |
August Weather | 23°C (74°F) | 131 mm (5.2 inches) | 65% | very high |
September Weather | 20°C (68°F) | 114 mm (4.5 inches) | 68% | very high |
October Weather | 14°C (58°F) | 141 mm (5.6 inches) | 74% | high |
November Weather | 6°C (44°F) | 88 mm (3.5 inches) | 82% | moderate |
December Weather | 2°C (36°F) | 111 mm (4.4 inches) | 80% | low |