Will Beijing Hit 28°C on July 22, 2026?
This market will resolve to the temperature range that contains the highest temperature recorded at the Beijing Capital International Airport Station in degrees Celsius on 22 Jul '26.…
Highest temperature in Beijing on July 22?
This is a threshold ladder. The useful signal is the implied range, not every single strike.
Price, depth and useful dates
An editorial view of the signal: what leads, how much activity is behind it, and which date carries the risk.
Price threshold range
What is happening now
The Polymarket “Highest temperature in Beijing on July 22?” ladder is currently dominated by a 28 °C “Yes” outcome, trading at a 96 % probability (price 0.96). This reflects a market consensus that the recorded peak temperature at Beijing Capital International Airport Station will be close to 28 °C, while probabilities for higher temperatures collapse sharply (29 °C “No” 96.1 %, 30 °C “No” 99.5 %, 31 °C “No” 99.6 %). The primary binary market – “25 °C or below” – is essentially a “No” (price 0.9995), indicating near‑certain expectation that the day will be warmer than that threshold. The event is marked as trending (rank 16) with total volume of $260 k and $247 k in 24‑hour volume, suggesting heightened speculative interest. Recent regulatory attention has emerged as the Bitcoin Foundation flagged roughly $200 M in Polymarket trades as possible insider activity, adding a layer of scrutiny to the platform’s high‑profile weather bets (Bitcoin Foundation). The market will not resolve until Wunderground publishes the first post‑date data point for 23 July 2026, after which any revisions to the historic temperature record will be frozen.
How the market is structured
This is a **price‑threshold ladder**: eleven binary markets covering discrete temperature outcomes from “25 °C or below” up to “35 °C or higher.” Each market asks whether the highest temperature will be exactly that value, creating a cumulative probability distribution. The implied range is therefore a narrow band around the highest‑probability strike – currently 28 °C. Leading outcomes are:
- 28 °C Yes – 96 % (price 0.96), volume $9 k, liquidity $742.
- 29 °C No – 96.1 % (price 0.961), volume $97 k, liquidity $1.67 k.
- 30 °C No – 99.5 % (price 0.995), volume $8.3 k, liquidity $1.45 k.
- 31 °C No – 99.6 % (price 0.996), volume $9.5 k, liquidity $677.
The primary “25 °C or below” market is effectively a “No” (price 0.9995), confirming the market’s view that the day will be well above that threshold. The ladder format allows traders to express precise temperature forecasts rather than a simple binary guess.
Path to the leading outcome
For the 28 °C “Yes” to resolve, the Wunderground historic log for Beijing Capital International Airport Station must record a peak temperature of exactly 28 °C on 22 July 2026. This requires two concrete events:
- The day must occur and meteorological stations must capture a maximum reading of 28 °C (whole‑degree precision as defined by the market).
- Wunderground must publish the daily summary for 23 July 2026, which triggers the market’s resolution clock; any subsequent revisions to that day’s temperature are then locked.
Until the post‑date data is available, the market’s price reflects expectations based on climatology, seasonal forecasts, and any speculative positioning. The high probability on 28 °C suggests that participants view this temperature as the most plausible peak given Beijing’s typical July climate.
What could change the pricing
Several factors could shift the ladder’s probabilities away from the current 28 °C “Yes” leader:
- Weather forecast revisions. If reputable services (e.g., China Meteorological Administration) issue updated forecasts that suggest a higher or lower peak, traders may reprice the relevant strikes.
- Insider or coordinated trading. The Bitcoin Foundation’s report on $200 M of flagged trades indicates possible abnormal activity that could artificially sustain or depress specific outcomes.
- Data source disputes. Should Wunderground’s temperature record be questioned or corrected after publication, the market’s resolution mechanics allow for a single revision window, potentially causing a rapid repricing.
- Market liquidity shifts. The 28 °C market has relatively modest liquidity ($742) compared with the 29 °C market ($
Editorial market brief.
This analysis is provided for informational and editorial purposes only. Market signal prices reflect market-implied expectations, not verified outcomes or recommendations. Markets can be illiquid, volatile, and subject to ambiguous resolution criteria.