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Jeddah July 8 Temperature: Will It Hit 38°C?

Jeddah July 8 Temperature: Will It Hit 38°C?

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SR Sofia Renard Climate & Science Analyst
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Lines Verdict
YES at 76% implied probability

CLIMATOLOGY FAVORS YES: Jeddah's July baseline and a 22-point repricing on July 6 both support the YES outcome. Market probability: 76%.

76% Market Probability
1h +1.0% 24h +0.0% Trend Weak (49/100)
Volume
$3.5K
$3.5K in 24h
Liquidity
$64.7K
Moderate depth
Time Left
2 days
Resolves Jul 8
3K Vol. Jul 8, 2026
38°C or higher $1K Vol.
76%
35°C $393 Vol.
5%

Jeddah sits on the Red Sea coast in one of the hottest urban corridors on Earth. In early July, the city routinely posts peak daily temperatures well above 40°C, and the question traders are pricing right now is not whether it will be hot. The question is whether July 8 clears the 38°C threshold. At 76% implied probability, the market has already done most of the work. Here’s what the measurements are telling us.

The market asks: what is the highest temperature recorded in Jeddah on July 8, 2026? The YES outcome (38°C or higher) is priced at $0.76. The combined field of lower brackets, from 37°C down to 28°C or below, covers the remaining $0.24. The contract resolves at 12:00 UTC on July 8. Total volume stands at $3,493, all of it traded in the last 24 hours.

How the Jeddah Temperature Contract Works

YES pays out if the official peak temperature recorded in Jeddah on July 8, 2026, reaches 38°C or above. Alternative outcomes resolve at lower brackets: 37°C, 36°C, 35°C, 34°C, 33°C, 32°C, 31°C, 30°C, 29°C, and 28°C or below. Resolution follows the market’s designated data source for that day’s official high.

  • YES (38°C or higher): $0.76, implying a 76% probability
  • NO field (37°C or below): $0.24 combined across ten lower brackets

The NO field pays when Jeddah’s peak falls short of 38°C on July 8. That means a maximum reading of 37°C or lower. Given Jeddah’s July climatology, that outcome requires either an unusual onshore sea breeze, elevated Red Sea humidity suppressing dry-bulb temperature, or a localized weather anomaly. Saudi Arabia’s national meteorological service, the National Center of Meteorology, operates the official surface observation network for these readings.

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Momentum and Market Signals

The momentum composite here is straightforward. The trend score sits at 52.04, the 1-hour price change is flat, and the 24-hour data shows the contract moved up roughly 22 points since market open on July 6, from $0.54 to $0.76. That repricing happened in three discrete jumps on July 6, each around 7% to 7.5%. The driver is almost certainly updated short-range weather model output for July 7 to 8, which would have sharpened forecasters’ confidence in a high above 38°C.

Total volume is $3,493, with all of it arriving in the last 24 hours. The data doesn’t care about the politics, but thin volume does matter for price reliability. Liquidity is $64,720, which is unusually deep relative to volume. That means the current price of $0.76 is not a large-bet artifact. It reflects genuine order book depth. Still, with under $5,000 in total trading, a single informed trader could push this contract materially in either direction before resolution.

  • The trend score of 52.04 combined with a 22-point 24-hour move points to a sharp directional repricing event on July 6, most likely tied to updated mesoscale model forecasts for the Jeddah area.
  • The 1-hour price change of 0.0% signals the market has stabilized at the new level and is waiting for resolution rather than new information.
  • Liquidity of $64,720 against $3,493 in volume means the bid-ask spread is tight and the 76% price is structurally supported by standing orders.
  • Volume below $1M means this price can move sharply if a new weather data point, a forecast model update, or a large single trade enters the book before July 8.
  • The July 8 noon UTC resolution gives less than 48 hours from now for conditions to change.

Lines Analysis: Jeddah Temperature Threshold

Jeddah’s July climatology is the dominant signal here. The city’s July mean daily maximum temperature runs between 40°C and 43°C based on long-term Saudi meteorological records. Coastal humidity from the Red Sea moderates the extreme dry heat typical of inland Saudi Arabia, but the baseline is still well above the 38°C threshold this contract requires. A peak below 38°C in Jeddah in July is a statistical outlier, not a normal day. The market is pricing uncertainty, not science, and the science here is fairly settled.

What makes the NO field real is a sustained onshore wind event. If the Red Sea breeze strengthens and pushes marine air inland on July 8, evaporative cooling and elevated relative humidity could suppress the dry-bulb peak to 36°C or 37°C. That scenario is rare in early July but not impossible. A tropical moisture surge from the Gulf of Aden or an anomalous low-pressure system over the Red Sea could also drive cloud cover and limit surface heating. The National Center of Meteorology’s regional forecasts for July 7 to 8 are the single most important input before resolution.

  • The National Center of Meteorology’s July 7 and July 8 surface forecast updates would confirm or challenge the current 76% pricing.
  • European Centre for Medium-Range Weather Forecasts and GFS model output for the Jeddah grid point on July 8 will sharpen confidence in either direction.
  • Any significant Red Sea onshore wind event flagged in the next 36 hours would push the NO field higher across the lower brackets.
  • A forecast holding Jeddah’s July 8 high above 40°C would push YES probability toward 90% or above.
  • Saudi Arabia’s National Meteorological Center daily bulletins, typically released the morning of the forecast day, are the last major data input before noon UTC resolution.

Total volume of $3,493 is thin. The liquidity depth of $64,720 means the order book can absorb a moderate trade without gapping, but this is still a low-conviction market in dollar terms. The climatological data favors YES clearly. The only credible NO scenario requires a specific atmospheric anomaly for which there is currently no confirmed forecast evidence. The data favors the YES side at the current price.

LINES VERDICT

CLIMATOLOGY FAVORS YES

Jeddah’s July baseline sits well above 38°C on most days. The 22-point repricing on July 6 tells us model output sharpened toward a hot day, and no counter-signal has emerged since.

What the market says: At 76% implied probability, the market prices a strong but not certain outcome. Thin volume means a single forecast update or large trade could push this toward 85% or back toward 60% before the noon UTC July 8 close.

Key unknown: The National Center of Meteorology’s July 8 morning forecast and the 00Z to 06Z GFS and ECMWF model runs for the Jeddah surface observation point are the decisive inputs. Any signal of a sustained Red Sea onshore wind event would reprice the NO field sharply upward.

Frequently Asked Questions

It means traders collectively assign a 76% chance that Jeddah's official peak temperature on July 8, 2026, reaches 38°C or higher. A 24% chance remains for any lower bracket outcome.

The NO field pays if Jeddah's July 8 high falls at 37°C or below. Ten lower-bracket outcomes from 37°C down to 28°C or below share that 24% combined probability.

Updated short-range weather model output, specifically GFS and ECMWF forecasts for the Jeddah grid point on July 7 to 8, or the National Center of Meteorology morning bulletin, would reprice the contract sharply.

The contract resolves at 12:00 UTC on July 8, 2026, based on the official peak temperature recorded in Jeddah on that date.

Liquidity of $64,720 supports the price structurally, but total volume under $5,000 means a single informed trade could move the price materially before the July 8 close.

We aggregate the live positions of the top 50 Polymarket whales (ranked by 30-day tracked volume) into one composite reading per market. It refreshes every hour. The percentage shows how many of those whales hold YES versus NO; the net dollar position shows the cohort's directional exposure in dollars.

A convergence event fires when three or more tracked wallets buy the same outcome on the same market within a four-hour window. We surface these in the activity feed and the VIP digest.

No. Lines is an editorial and data product. We do not operate prediction markets, custody funds, or accept trades. All trade flows deep-link to Polymarket via our affiliate code. Probabilities shown are market-implied and not predictions or recommendations.

What Could Shift These Probabilities?

Models Confirm Hot Day

If the July 7 to 8 GFS and ECMWF model runs for the Jeddah surface grid point hold the peak forecast above 40°C, the YES probability pushes toward 90% or higher. Jeddah's July climatological baseline provides a strong structural floor for this outcome, and stable synoptic conditions over the Red Sea would reinforce it.

Onshore Sea Breeze Suppresses Peak

A strengthening Red Sea onshore wind event on July 7 to 8 could push marine air inland and suppress the dry-bulb temperature peak to 36°C or 37°C. This scenario is rare in early July but would reprice the NO brackets sharply upward. The National Center of Meteorology's morning bulletin on July 8 would be the first confirmation.

Lower Bracket Captures the Day

The 37°C bracket is the most likely NO outcome if conditions deteriorate slightly. Elevated Red Sea humidity combined with partial cloud cover from a Gulf of Aden moisture surge could hold the maximum below 38°C without requiring an extreme anomaly. The 24% combined NO field reflects this as a genuine possibility, not a negligible tail risk.

Extreme Heat Spike Above 43°C

Jeddah occasionally records peak temperatures above 43°C in July during Shamal wind events that draw hot, dry interior air toward the coast. If a northerly surge dominates on July 8, the peak could spike well above 40°C, making the 38°C YES threshold trivial and pushing resolution certainty to near-100%. A single large trade on that forecast would gap the price instantly.

Key macro factor: Saudi Arabia's Red Sea coastal climate in July is dominated by the subtropical high pressure system over the Arabian Peninsula, which suppresses precipitation and drives persistent high temperatures well above the 38°C resolution threshold in most years.

Market Timeline

4:04 AM
Market Created
4:04 AM
Market Opened
Wednesday, Jul 8
Market Resolution

Market Comments

Probabilities shown are market-implied and not predictions or recommendations. This content is for informational purposes only.