LA High Temperature May 29: Will 68-69°F Hit?

The Los Angeles temperature market for May 29 has a sharp edge to it. This is not a question about whether summer is coming. It is a question about whether the National Weather Service readings land inside a single two-degree window by noon tomorrow. The leading outcome, 68-69°F, now sits at 46.5% implied probability after surging more than 13% in the past 24 hours. That move is the story.

The market question asks: What is the highest temperature in Los Angeles on May 29? The YES price on 68-69°F is $0.47. The NO price is $0.54. The market closes at 12:00 PM on May 29, 2026. Total volume stands at $7,774, with $5,308 traded in the past 24 hours alone.

How the Los Angeles Temperature Contract Works

This contract resolves on the highest recorded temperature in Los Angeles on May 29, as determined by the market’s resolution source. The National Weather Service Los Angeles office (NWS LAX) provides the authoritative surface temperature readings. Traders are pricing the probability that the peak reading falls inside the 68-69°F band before the noon resolution cutoff.

• YES ($0.47, 46.5%): The highest recorded temperature in Los Angeles on May 29 lands between 68°F and 69°F.
• NO ($0.54, 53.5%): The highest recorded temperature falls outside this band, in any direction.

The NO side pays out across a wide field. Competing bands include 66-67°F, 70-71°F, 64-65°F, and 72°F or higher. For the 68-69°F outcome to miss, the temperature only needs to land one degree outside the window. Late-May marine layer patterns make the 66-67°F and 70-71°F bands the most realistic alternatives. Readings above 72°F would require an unusual offshore wind event with no marine layer suppression.

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Momentum and Market Signals

The combined momentum signal is bullish for the 68-69°F band. A 13.5% gain in 24 hours paired with a trend score of 50.52 points to weather model convergence, most likely the NWS LAX afternoon forecast run on May 28 tightening its range toward the upper 60s. Short-range models (the NAM and GFS) typically lock onto a two-to-three degree precision window inside 24 hours, and that appears to be what moved this price.

Total volume of $7,774 is thin by prediction market standards. The $5,308 traded in the past 24 hours represents most of the contract’s lifetime activity. Liquidity sits at $44,287, which is healthy relative to volume. But with total volume under $10,000, a single large order can move this price sharply. The current probability reading is a real signal, but it is not a deep-market consensus.

• The 24h price change of +13.5% is the dominant signal, consistent with a new NWS forecast run tightening the temperature band toward 68-69°F.
• The 1h price change of 0.0% shows the market has stabilized after the big move, with no new catalyst in the past hour.
• Liquidity at $44,287 is strong relative to the volume, meaning the order book can absorb moderate-sized trades without major slippage.
• The noon resolution cutoff is critical. Downtown LA temperatures in late May often peak between 1 PM and 4 PM local time. A noon cutoff means the market resolves before the true daily high in most meteorological setups.
• The thin total volume means the 46.5% probability reflects a small trader pool. New forecast data could move this significantly in either direction before resolution.

Lines Analysis: The Marine Layer and the Noon Cutoff

The data favoring 68-69°F is real. Late May in Los Angeles is deep inside the “May Gray” pattern, where a persistent marine layer off the Pacific suppresses morning and midday temperatures. Downtown LA and the primary NWS measurement stations typically see highs in the upper 60s to low 70s during this period. The 24-hour price surge suggests model runs have settled near that range for tomorrow. That is a credible signal.

The noon cutoff complicates everything. NWS LAX data shows that downtown temperatures in late May rarely reach their daily peak before noon. The true high usually occurs in the early-to-mid afternoon. A market resolving at 12:00 PM is essentially pricing the highest temperature recorded in the morning hours. That shifts the probability distribution downward, toward the 64-67°F bands. Traders pricing this as a standard daily-high market may be missing this structural detail.

• NWS LAX forecast convergence toward the upper 60s supports the 68-69°F band if the market resolves on a true daily high.
• A noon resolution cutoff shifts the effective measurement window to morning hours, favoring lower bands like 66-67°F or 64-65°F.
• An offshore wind event or Santa Ana condition would push temperatures well above 70°F but would also arrive later in the day, after resolution.
• Persistent overcast from the marine layer could hold readings in the low-to-mid 60s through noon, making the 64-65°F or 62-63°F bands competitive.
• The NWS LAX 24-hour forecast update, typically issued around 4-6 AM Pacific time on May 29, is the single most important data point before resolution.

The data favors a cautious read here. Total volume of $7,774 is not a deep consensus. The noon cutoff structurally biases the market toward lower temperatures than a full-day reading would produce. The 68-69°F band is a reasonable central estimate for a daily high, but as a noon-cutoff market, the bands immediately below deserve more weight than current pricing suggests.

LINES VERDICT

NARROW LEADER WITH STRUCTURAL RISK

The 68-69°F band holds the leading position on real forecast signal, but the noon resolution cutoff means this market is not pricing a true daily high. The data points to a slightly lower effective reading than traders may assume.

What the market says: At 46.5% implied probability, the market treats 68-69°F as the most likely single band but not a confident majority. Thin volume means this price can shift sharply on the NWS LAX morning forecast update before the noon cutoff on May 29.

Key unknown: The NWS LAX forecast issued in the early morning hours of May 29 will set the temperature range for the resolution window. If that forecast shows the marine layer holding through noon, the 64-67°F bands gain ground immediately.

Scientific Context

Los Angeles in late May sits inside the climatological “May Gray” period. The California coastal marine layer, driven by cold upwelling from the California Current, suppresses temperatures at coastal and downtown stations. NWS historical data for downtown LA in late May shows average highs near 70°F, with the distribution running from the mid-60s to the mid-70s depending on marine layer depth and wind direction. The noon cutoff on this contract captures the cooler portion of the daily temperature curve in virtually all standard late-May setups. Only an offshore flow event would push readings above 70°F before noon, and those events are less common in late May than in fall months.

What was the highest LA temperature on May 29?

The market resolves at noon on May 29. The leading band is 68-69°F at 46.5%, followed by 66-67°F and 70-71°F as the nearest competitors.

What does NO mean on this contract?

NO pays out if the highest recorded temperature falls outside 68-69°F. Any other band winning, including 66-67°F or 70-71°F, resolves NO for this specific outcome.

What data moves this market?

NWS LAX forecast updates are the primary driver. Short-range model runs issued the morning of May 29 could shift the probability distribution across the adjacent bands significantly.

When does this market resolve?

Resolution is at 12:00 PM on May 29, 2026. This is a noon cutoff, not an end-of-day settlement, which affects which temperature bands are most competitive.

Is the volume reliable?

Total volume is $7,774, which is thin. The 46.5% probability reflects a small number of trades. Liquidity at $44,287 is adequate, but new information can move this price sharply before resolution.