TOTAL VOLUME:
$134.2b
24H VOL:
$126,324,530
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,434,646,834
406,019
Markets across
30,401
events
MATCHED EVENTS:
2,689
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Sep 20, 11:59 PM EST
Kalshi
This event tracks whether San Antonio will experience consecutive days of high temperatures above 90°F during a specific week. It examines temperature patterns and their persistence over several days, focusing on the reliability of weather data during that period.
The event determines if San Antonio experiences a specified number of consecutive days with average temperatures strictly above 90°F between September 14 and September 20, 2026. Each market requires a different minimum number of consecutive days (ranging from 2 to 6 days) to resolve to Yes. A day's average temperature is calculated as the mean of hourly temperatures reported by The Weather Company for KSAT from midnight to midnight local time, rounded to the nearest whole degree. Only full days with at least 18 hourly reports count toward a streak; any day falling short or recording exactly 90°F breaks the streak. All data used for resolution will be the official figures published at the expiration time, with any subsequent revisions disregarded.
Currently, it's difficult to directly compare prediction market odds to specific analyst forecasts for this event, as comprehensive long-range temperature predictions are not widely available with quantified probabilities. However, this market reflects the collective wisdom of traders, incorporating various factors like seasonal forecasts, climate models, and even anecdotal expectations. If analysts were to release probabilistic forecasts for sustained 90°F+ temperatures in San Antonio during that week, it would be interesting to see how they align with the market’s implied probability.
On Kalshi, this market is priced using a continuous double auction, meaning traders buy and sell contracts representing different outcomes. The price of a contract reflects the market’s assessment of the probability of that outcome occurring. 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 market price represents the cost to purchase a contract that pays out $1 if the event occurs, and the implied probability is derived from this price.
This market resolves around Sep 22, 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 recorded in San Antonio, Texas, during the week of September 14, 2026. If the average temperature exceeds 90°F for a consecutive number of days as defined by the market contract, the market will settle in favor of the 'yes' outcome; otherwise, it will settle to 'no'.
Several factors could influence trading in this market. Long-range weather forecasts released closer to September 2026 will be closely watched, as will any significant shifts in climate patterns like El Niño or La Niña. Unexpected heat waves in other parts of the country during the summer of 2026 could also impact trader sentiment. Finally, any news regarding advancements in climate modeling or changes to San Antonio’s urban heat island effect could also move this market.