Typically, September marks the end of summer and the beginning of fall in San Jose, California. This transitional month offers warm, dry days and cooler nights, with average high temperatures ranging from the low 80s (F) to the high 70s (F) and average lows from the mid-50s (F) to the low 60s (F). Rainfall is minimal, averaging less than half an inch throughout the month. The shift in seasons can sometimes bring Diablo winds, contributing to increased fire risk in the surrounding hills and valleys.
Understanding the typical climate conditions during this period is crucial for residents and visitors alike. This information can inform decisions regarding outdoor activities, wardrobe choices, and potential travel plans. Historically, September has been a popular time to visit San Jose, offering pleasant weather for exploring the city’s numerous parks, museums, and outdoor attractions. Moreover, awareness of the increased fire danger is vital for community safety and preparedness.