LA High Temp July 9: Will 76-77°F Hit the Mark?

Los Angeles sits at a crossroads heading into July 9. The market has settled on 76-77°F as the most likely daily high, carrying a 43% implied probability in a field of eleven possible bands. That number reflects real uncertainty. No single outcome commands a majority, and the spread across nearby bands tells you the market is pricing a tight distribution around a mid-70s call.

The market question asks: what is the highest temperature in Los Angeles on July 9? YES on 76-77°F pays at $0.43, NO at $0.57. The market resolves at noon Pacific on July 9, 2026, with $10,656 in total volume and $55,529 in available liquidity.

How the 76-77°F Contract Works

This contract resolves YES if the official peak temperature recorded in Los Angeles on July 9 falls between 76°F and 77°F inclusive. The resolution source is Polymarket’s designated weather data provider. Any reading of 78°F or above, or 75°F or below, resolves this contract NO regardless of how close the actual reading comes.

• YES (76-77°F): priced at $0.43, implying a 43% probability that the daily high lands in this two-degree band.
• NO (any other band): priced at $0.57, implying a 57% probability that the high falls outside 76-77°F on July 9.

A NO outcome is straightforward. Los Angeles records a daily high above 77°F or below 76°F, and every band outside 76-77°F pays out instead. July in coastal Los Angeles typically runs between the low 70s and mid-80s depending on marine layer behavior. A stronger onshore flow keeps highs in the low-to-mid 70s. A retreating marine layer or a ridge of high pressure pushes readings into the upper 70s and 80s. Either shift sends this contract to zero.

Momentum and Market Signals

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The momentum composite across the one-hour window and the trend score of 52.14 shows a flat, consolidating market. No 24-hour price change data is available, but the contract has moved from $0.39 at open to $0.43 now, a modest directional shift toward the primary outcome. The driver is almost certainly incoming NWS forecast data for the LA basin through July 9.

Total volume sits at $10,656, with all of it arriving in the last 24 hours. Liquidity of $55,529 is healthy relative to the volume traded. Because total volume is well below $1 million, a single large bet could move this price sharply. Thin markets like this one are especially sensitive to weather model updates in the 12 to 24 hours before resolution.

• The 1h price change is flat at 0.0%, suggesting the market has digested the most recent forecast data and is waiting for the next update.
• The trend score of 52.14 is barely above neutral, confirming neither strong bullish nor bearish conviction on this band.
• Volume of $10,656 is entirely recent activity, which means this market activated quickly and traders are engaged.
• Liquidity of $55,529 creates room for larger positions, but thin total volume means price discovery is still early.
• The current price of $0.43 represents a modest upward shift from the $0.39 open, consistent with a forecast nudging the expected high into the mid-to-upper 70s.

Lines Analysis: The Marine Layer Is the Whole Story

Here’s what the measurements are telling us. July 9 in Los Angeles is governed almost entirely by marine layer dynamics. When the June Gloom pattern lingers or reasserts, morning cloud cover suppresses afternoon highs into the low-to-mid 70s. NWS forecast data for the LA basin through mid-July currently supports a pattern typical of early July: partial marine influence, afternoon clearing, highs near the coast in the mid-to-upper 70s. That profile aligns with the 76-77°F band better than any neighboring outcome.

The data doesn’t care about the politics of whether traders want this band to win. What makes NO real is the same marine layer that supports YES. A stronger-than-forecast marine push keeps highs in the 72-75°F range, shifting volume to the 74-75°F band. A heat ridge building inland pulls temperatures to 78°F or above, handing the contract to the 78-79°F or higher bands. Both scenarios are live. The 57% NO price reflects exactly that: the 76-77°F target is the single most likely band, but the probability of landing outside it is higher than the probability of landing inside it.

Signals to monitor before July 9 resolution:

• NWS Los Angeles forecast updates: any shift in the predicted high above 78°F or below 75°F directly reprices this contract.
• Marine layer depth reports from the National Weather Service: deeper marine influence suppresses highs below the target band.
• Offshore pressure gradient data: a strengthening Santa Ana or thermal low inland pushes the distribution toward warmer bands.
• Ensemble model agreement: when GFS and Euro models converge on a specific high temperature, market prices tend to follow within hours.
• Early July 9 morning readings: if the marine layer is burning off quickly by 9 AM local time, the afternoon high trends toward the upper end of the distribution.

Total volume of $10,656 is modest but real. The data distribution across eleven bands makes this a genuine probability puzzle. The current pricing favors 76-77°F as the modal outcome, but the measurement window is narrow enough that a two-degree forecast error flips the contract entirely.

LINES VERDICT

Marginal Favorite in a Wide Field

The 76-77°F band earns its position as the market’s top pick because mid-July coastal LA forecasts cluster there, but eleven competing outcomes mean even the frontrunner is a long shot in absolute terms.

What the market says: At 43% implied probability, the market treats 76-77°F as the most likely single outcome while acknowledging the outcome space is genuinely uncertain. With resolution at noon Pacific on July 9, any NWS forecast revision in the next 12 hours could reprice this contract sharply given thin total volume.

Key unknown: The single most important input is the NWS Los Angeles Area Forecast Discussion published on the evening of July 8. If that forecast shifts the expected daily high by two degrees in either direction, this contract moves.