Jeddah June 29 Temperature: Will It Hit 40°C?

Two days out from resolution, the Jeddah temperature market is sitting at a genuine coin-flip. The implied probability for a maximum of 40°C or higher on June 29 stands at 45.5%, up sharply in the last hour after a 6.5% price jump. That move happened fast, and in a market with only $2,471 in total volume, a single informed bet can shift the odds meaningfully.

The market question is straightforward: will Jeddah’s highest recorded temperature on June 29, 2026 reach 40°C or above? YES is priced at $0.46, NO at $0.55, with resolution set for June 29 at 12:00 UTC. Total trading volume is $2,471, all of it placed in the last 24 hours.

How the Jeddah 40°C Temperature Contract Works

This contract resolves YES if Jeddah’s official maximum temperature on June 29 equals or exceeds 40°C. It resolves NO if the recorded high falls anywhere below that threshold, across the alternative outcomes listed: 39°C, 38°C, 37°C, and below. The resolution source is the market’s own verified temperature data, based on official meteorological observation.

• YES ($0.46, 45.5% implied): Jeddah records a high of 40°C or above on June 29.
• NO ($0.55, 54.5% implied): Jeddah’s peak temperature on June 29 falls below 40°C, landing at 39°C or lower.

The NO side wins if Jeddah’s heat stays suppressed on June 29. A high of 39°C misses the threshold by a single degree and pays out across the alternative outcomes. Jeddah’s coastal location on the Red Sea can moderate peak daytime temperatures relative to inland Saudi cities, and any onshore sea breeze on that specific day can shave one to two degrees off the maximum reading. That’s the meteorological mechanism the NO side is pricing.

Momentum and Market Signals

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The composite signal here is bullish but fragile. A 6.5% jump in the last hour, with a trend score of 53.14, points to fresh money moving into YES. Given that the 24-hour volume figure equals total volume, this market opened and all trading happened today. That context matters: the momentum is real, but it reflects a very small number of trades in a very thin book.

Total volume is $2,471. Liquidity sits at $56,334, which is actually deep relative to trading activity. That liquidity ratio tells you the order book is well-stocked, but traders have barely touched it. This market has thin participation, which means price can move sharply on even a modest new position. A single $500 bet could push YES above 50%.

• The 6.5% one-hour price jump in YES reflects new positioning, not a broad shift in trader consensus.
• Total volume of $2,471 is well below $1 million, meaning price signals here carry limited statistical weight.
• Liquidity at $56,334 is deep relative to volume, so the order book can absorb new trades without slippage.
• The trend score of 53.14 is mildly bullish, consistent with momentum building toward YES but not yet decisive.
• Open interest at zero suggests no positions are being held in reserve. All activity is directional and immediate.

Lines Analysis: Jeddah’s June Heat Profile

Here’s what the measurements are telling us. Jeddah in late June sits inside one of the most thermally intense regions on Earth. The city’s historical June maximum temperatures regularly touch 40°C to 43°C, particularly in the second half of the month. The Saudi Presidency of Meteorology and Environment has documented consistent above-40°C peaks across June in recent years, with the Red Sea’s humidity adding to heat stress even when it slightly moderates the dry-bulb maximum. The base rate for Jeddah hitting 40°C on any given late-June day is historically well above 50%.

What makes NO credible is Jeddah’s specific coastal dynamic. Unlike Riyadh or Mecca, Jeddah sits on the Red Sea coast, where afternoon sea breezes occasionally push the recorded maximum below the 40°C mark. A westerly onshore flow on June 29 could produce a high in the 38°C to 39°C range. That’s the real scenario the NO side is betting on, not a cool day, but a day where coastal moderation keeps the official maximum just under the threshold. The data doesn’t care about the politics of this, but the meteorology cares a lot about that one-degree gap.

• Saudi Presidency of Meteorology and Environment data releases for June 29 will determine resolution directly. Any official reading at or above 40°C closes YES immediately.
• Red Sea sea-breeze patterns on June 28 and 29 are the key meteorological signal. Easterly or calm winds favor YES; onshore westerlies favor NO.
• Regional synoptic weather patterns, including any low-pressure system over the Red Sea or high-pressure ridge over the Arabian Peninsula, will set the backdrop.
• Temperature forecasts from services tracking Jeddah specifically, including Saudi national meteorological bulletins, are worth monitoring in the 48 hours before resolution.

The market is pricing uncertainty, not science, and right now it is pricing genuine meteorological uncertainty. The $2,471 in total volume is too thin to read as a strong consensus signal. The base rate favors YES, the coastal geography creates real NO scenarios, and the current 45.5% YES probability sits slightly below what historical June data would suggest. That gap between base rate and market price is where the interesting question lives for this contract.

LINES VERDICT

LEAN YES, THIN MARKET

Jeddah’s late-June climatology strongly supports temperatures at or above 40°C, but the coastal sea-breeze factor creates genuine one-degree uncertainty that makes this a real market rather than a sure thing.

What the market says: At 45.5% implied probability, the market is treating this as a near coin-flip. Given Jeddah’s historical late-June temperature profile, that probability may be slightly underpriced, but thin volume means the price can shift dramatically before the June 29 resolution date.

Key unknown: The single most important input is the Red Sea wind direction on June 29. An onshore westerly breeze on that day is the primary mechanism that could hold Jeddah’s maximum below 40°C and reprice this contract sharply toward NO.