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 in October 2026. However, prediction markets often incorporate a wider range of information than traditional forecasts, including subjective factors and local knowledge. This can lead to differences in probabilities. If meteorological analysts predict a higher or lower chance of a heat wave than is reflected in this market, it could present an opportunity for informed traders. It’s important to consider that prediction market prices represent the collective wisdom of many participants, not a single expert opinion.

On Kalshi, this market is priced using a continuous double auction, meaning buyers and sellers set the prices through their bids and asks. The price represents the probability of the event occurring, with higher prices indicating a greater perceived likelihood. On Kalshi, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. Traders can buy 'yes' contracts if they believe the event will happen, or sell 'no' contracts if they believe it won't. The market price fluctuates based on supply and demand, reflecting the evolving beliefs of all participants. The current price reflects the aggregated assessment of all traders on Kalshi.

This market resolves around Oct 13, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. Specifically, the resolution will be based on the average daily high temperature in San Diego, California, during the week of October 5, 2026. If the average temperature exceeds 90°F on a consecutive basis for any number of days within that week, the 'yes' contracts will pay out. Otherwise, the 'no' contracts will pay out. The data will be sourced from publicly available weather records and verified for accuracy.

Several factors could influence trading in this market. Long-range weather forecasts issued closer to October 2026 will be significant, especially if they deviate from current expectations. Any major shifts in climate patterns, such as the development of a strong El Niño or La Niña event, could also impact the market. News reports about potential heat waves or unusual weather phenomena in Southern California could also drive trading activity. Finally, general economic conditions and investor sentiment can sometimes play a role, even in seemingly unrelated markets like this one.