Last updated: June 24, 2025
In September, the average temperature in Stockton, United States hovers around 19°C (67°F), with fluctuations ranging from a cool 2°C (36°F) to a warm 33°C (92°F). Expect 117 mm (4.6 in) of precipitation spread over about 10 days, contributing to an average humidity of 74%. Enjoy the diverse weather as you explore! 🌦️
In September in Stockton, the average temperature is 19°C (67°F), with maximums reaching 33°C (92°F) and minimums dropping as low as 2°C (36°F). This range makes it a great time to visit for those who enjoy mild weather but should be prepared for both warm days and cooler nights.
In Stockton in September, the total precipitation amount is 117 mm (4.6 in) recorded over a span of 10 days.
In Stockton in September, humidity is 74%. With an average temperature of 19°C (67°F), this humidity feels like a warm, enveloping blanket that can make outdoor activities feel stifling, often leading travelers to seek shade and hydrate frequently.
In Stockton 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 Stockton.
UV Risk Categories
Weather in Stockton varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Stockton, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -5°C (23°F) | 57 mm (2.2 inches) | 84% | moderate |
| February Weather | -4°C (24°F) | 58 mm (2.3 inches) | 85% | moderate |
| March Weather | 3°C (38°F) | 72 mm (2.8 inches) | 84% | high |
| April Weather | 9°C (48°F) | 96 mm (3.8 inches) | 83% | very high |
| May Weather | 16°C (61°F) | 145 mm (5.7 inches) | 75% | very high |
| June Weather | 22°C (72°F) | 120 mm (4.7 inches) | 79% | very high |
| July Weather | 24°C (76°F) | 84 mm (3.3 inches) | 75% | very high |
| August Weather | 22°C (72°F) | 100 mm (3.9 inches) | 69% | very high |
| September Weather | 19°C (67°F) | 117 mm (4.6 inches) | 74% | very high |
| October Weather | 11°C (52°F) | 110 mm (4.3 inches) | 79% | moderate |
| November Weather | 3°C (37°F) | 45 mm (1.8 inches) | 88% | moderate |
| December Weather | -1°C (31°F) | 48 mm (1.9 inches) | 82% | low |