Major events in California, United States 2025

There will be 26,718 impactful events in California, United States in the next 90 days, with 26,760,502 people attending and a predicted event spend (USD) of $2,535,102,499.

Turn millions of real-world events, including concerts, sports, festivals, and conferences, into structured, API-ready intelligence for precise forecasting and decision-making. PredictHQ gives you access to global event details, impact scores, and seamless API integration so you can forecast attendance, understand event impact, and build more context-aware, explainable systems.

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Event Insights for California, United States in the next 90 days

  • Predicted Attendance

    26,760,502

  • Predicted Event Spend (USD)

    $2,535,102,499

  • Attended Events

    24,596

  • Non-Attended Events

    2,100

  • Unscheduled Events

    22

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Upcoming top events that will impact businesses' demand in California, United States from December 2025

Below are some of the biggest events to occur within California, United States in 2025. With our powerful event API and tools, you can train your forecasting models to significantly improve their accuracy or simply gain more visibility on what's going on around your key business locations. Get started today.

Explore all 19 event categories

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Customers using PredictHQ
Sign up with PredictHQ to view all eventsAbove are some of the biggest events to occur within California, United States from December 2025. With our powerful Events API and tools, you can train your forecasting models to significantly improve their accuracy or simply gain more visibility on what's going on around your key business locations.Get Started

Use cases for our event data

Demand Forecasting

Quickly achieve a minimum 10% improvement in Forecast Accuracy

Event Visibility

Get value from demand intelligence by being able to upload locations, search and identify relevant events efficiently

Visualizations & Insights

Visualize event data through BI tools like Tableau to better understand impact
View more use cases