How many days will San Diego be above 90°F?

Currently, it’s difficult to directly compare the odds in this market to specific analyst forecasts for San Diego temperatures. However, prediction markets often aggregate diverse information and participant viewpoints, potentially offering a different perspective than traditional weather predictions. While analysts rely on models and historical data, this market reflects the collective judgment of traders who may incorporate factors not captured in standard forecasts, such as localized effects or unforeseen weather patterns. The market's implied probability can therefore serve as a complementary data point alongside professional meteorological analysis.

On Kalshi, this market is priced using a continuous double auction. Traders buy and sell contracts representing the outcome of the event, and the price of these contracts reflects the market’s assessment of the probability of that outcome. As more traders participate and new information becomes available, the price adjusts accordingly. On Kalshi, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. The price fluctuates based on supply and demand; if many traders believe a heat wave is likely, the price will rise, and vice versa. This dynamic pricing mechanism allows the market to efficiently incorporate new information and reflect the collective wisdom of the crowd.

This market resolves around Oct 6, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. Specifically, the resolution will be based on the average daily temperature in San Diego for each day of the week of September 28, 2026. If consecutive days reach or exceed 90°F, the market will settle in favor of the ‘yes’ outcome. Otherwise, it will settle in favor of ‘no’. The data used for verification will be sourced from established meteorological authorities and publicly available records.

Several factors could significantly influence trading activity in this market. Long-range weather forecasts released in the months leading up to September 2026 will be closely watched by traders. Any indications of a developing high-pressure system or unusual atmospheric conditions could drive increased volume and price movement. Additionally, broader climate trends and reports on potential El Niño or La Niña effects could also play a role. Unexpected heat waves in other regions during the summer of 2026 might also affect trader sentiment, as they could signal a pattern of unusually warm weather.