Predicting the exact high temperature in a specific city on a given day is a classic weather market. While people don't typically bet on exact degrees in everyday life, it is a fairly common and standardized event type on prediction market platforms.

From April 3, 2026 to April 6, 2026, the price of the 29°C option rose from 19.5c to 30c (peaking at 35.5c), while the 26°C option plummeted from 15.5c to 1c, and the 27°C option dropped from 15c to 3.6c. This is because, as the forecast date approaches, weather models have ruled out the possibility of lower temperatures, solidifying the forecast median around 29-30°C. From April 3, 2026 to April 4, 2026, the price of the 31°C option plummeted from 22c to 11c. This is because as the date approaches, weather forecast models are more confident that the high will be around 28-29°C, significantly reducing the probability of extreme heat. From April 1, 2026 to April 3, 2026, no significant price movements exceeding 10 cents were observed.

Predicting the exact maximum temperature for a specific city on a given date falls under weather prediction markets. While it has a niche quantitative audience, it is uncommon for the general public to actively think about.

April 5, 2026 - April 6, 2026, the price of '9°C or higher' surged from 19.5c to 54c. The reason is that the latest weather model updates significantly raised the expected maximum temperature for the Helsinki area, causing funds to concentrate rapidly on the highest temperature tier. April 4, 2026 - April 5, 2026, the price of '8°C' spiked from 15c to a peak of 39.5c, before falling back to around 18c as temperature expectations rose even further. April 4, 2026 - April 5, 2026, the price of '7°C' experienced a similar fluctuation, rising from 18.5c to 37c before dropping back to 15.5c, aligning with the dynamic adjustment of warming expectations. April 3, 2026 - April 4, 2026, the price of '-1°C or below' plummeted from 25.5c to 0.65c because extreme cold scenarios were completely ruled out by updated weather models as the date approaches. April 3, 2026 - April 4, 2026, the prices of '1°C' and '2°C' both dropped significantly from 26c to around 5c, due to earlier forecasts indicating a strong warming trend on April 7, making near-freezing highs highly unlikely.

There is a notable divergence between market pricing and mainstream weather forecasts. Publicly available forecasts from mainstream meteorological services (like AccuWeather) project the maximum temperature at Helsinki Vantaa Airport on April 7 to be around 43-44°F (approx. 6-7°C). However, the prediction market implies a 54% probability for '9°C or higher'. This suggests that traders are either relying on specific proprietary data from Wunderground (the resolution source) or accounting for a localized microclimate at the airport station that broader mainstream forecasts might not fully capture.

There is a notable discrepancy risk: while the title says 'Seoul', the resolution criteria explicitly specify the 'Incheon Intl Airport Station' (RKSI). Incheon is a different, coastal municipality with temperatures that often differ significantly from central Seoul. Additionally, the market resolves strictly to Wunderground's rounded whole-degree Celsius figures, meaning more precise official data won't count.

While checking the weather is a mundane daily activity, placing bets on the exact daily high temperature bracket for a specific localized station in a prediction market is somewhat niche and functions as a novelty market.

April 5, 2026 - April 6, 2026, the price for 12°C surged from 17c to 36.5c, while 13°C also climbed from 17.5c to 31c. The reason is that short-term weather forecasts became more definitive, ruling out the previously expected colder air mass and locking the high temperature forecast into a slightly warmer range. April 5, 2026 - April 6, 2026, the price for 11°C dropped from 23c to 12c, as the likelihood shifted heavily towards 12-13°C. April 5, 2026 - April 6, 2026, the price for 13°C dropped from 27.5c to 18.5c, while 11°C rebounded from 17.5c to 25.5c. The reason is that as the date approaches, weather forecasts further confirmed the impact of the cold front, narrowing the expected peak temperature to the 11°C-12°C range. April 3, 2026 - April 4, 2026, the Yes price for 11°C fell from 28c to 13c, prices for 9°C and 10°C both dropped by over 15c, and the '15°C or higher' option fell from 24.5c to around 17c, indicating that the market was pricing out extreme cold and unexpected heat scenarios during early model revisions.

April 4, 2026 10:45 - April 5, 2026 20:20, Christian Hubicki's Yes price surged from 46c to 87.5c, due to highly credible spoilers leaking that confirm him as the elimination target for this episode. April 4, 2026 17:15 - April 5, 2026 18:10, Dee Valladares's Yes price plummeted from 67.5c to 27.5c, likely due to shifting market attention and spoilers clearing her from elimination. April 3, 2026 21:45 - April 3, 2026 23:55, Rick Devens's Yes price dropped sharply from 72c to 50.5c, likely due to early elimination spoilers being debunked or a market sell-off correction. April 3, 2026 19:35 - April 3, 2026 21:45, Cirie Fields's Yes price plummeted from 49c to 15.5c, and Ozzy Lusth's Yes price crashed from 50.5c to 17.5c, likely due to reliable spoilers surfacing in the community confirming their safety this week. April 3, 2026 15:15 - April 3, 2026 17:25, Rick Devens's Yes price surged from 41.5c to 71.5c, likely driven by transient negative rumors on spoiler forums.

April 5, 2026 17:05 - 22:30, the price of '20°C' spiked from 16c to 31.5c, as updated weather forecasts narrowed the prediction range, heavily pointing towards a 20°C maximum. April 4, 2026 17:15 - 19:25, the price of '23°C' spiked from 10.5c to 20.5c, likely due to speculative buying in low liquidity, diverging from mainstream 19°C-21°C forecasts. April 1, 2026 - April 3, 2026, the price of '15°C or below' plummeted from around 25c to 1.8c, caused by updated forecasts ruling out an extreme cold front and stabilizing expectations in the 19°C-21°C range.