Miami Overnight Low June 9: Can 78-79°F Hold?

Miami in early June runs warm. The overnight low on June 9 is not a mystery to atmospheric science. It is a question of where, exactly, the mercury settles inside a narrow band that spans roughly twenty degrees of possibility. The 78-79°F range is the market leader at 36.5% implied probability, but that is a long way from certainty. The market is pricing uncertainty, not science.

The contract asks: what will the lowest temperature in Miami be on June 9? The primary outcome, 78-79°F, is priced at $0.37 YES and $0.64 NO. Resolution closes at 2026-06-09 12:00:00. Total volume is $2,630, with $2,641 traded in the last 24 hours and $19,591 sitting in the order book.

How the Miami June Nine Temperature Contract Works

YES on the 78-79°F outcome pays if the official lowest temperature recorded in Miami on June 9 falls within that two-degree window. Resolution follows market-designated weather data. The full range of outcomes spans from 69°F or below all the way to 88°F or higher, with eleven discrete bands in between.

• 78-79°F (primary outcome): $0.37 YES, $0.64 NO, 36.5% implied probability
• 76-77°F: second most likely cooler bracket
• 80-81°F: next warmer bracket
• 82-83°F, 84-85°F, 86-87°F, 88°F or higher: increasingly unlikely warm outcomes
• 74-75°F, 72-73°F, 70-71°F, 69°F or below: cooler outcomes requiring a meaningful atmospheric disruption

The NO side covers every outcome outside 78-79°F. That is a wide net. For NO to pay out, the overnight low simply needs to land anywhere in the other ten brackets. Miami’s June climate is consistent, but the two-degree resolution window is narrow. A slightly stronger overnight sea breeze, an early tropical moisture surge, or a brief frontal boundary sagging south could push the low one bracket warmer or cooler. The bracket width, not climate volatility, is the primary risk for YES holders here.

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Momentum and Market Signals

The momentum composite is essentially flat. The 1-hour price change is zero, and the trend score sits at 50.45, which is a coin flip in directional terms. There is no meaningful price catalyst in the last hour. The market opened this week at $0.40 and has drifted lower, with recorded drops on June 7 followed by a partial recovery on June 8. The current $0.37 reflects modest selling pressure on the primary outcome.

Total volume of $2,630 is thin. The 24-hour figure of $2,641 is essentially the entire market’s trading history, which tells you this contract is newly active. Liquidity of $19,591 is healthy relative to volume, meaning the order book can absorb a few larger bets without violent price swings. But with volume well below $1 million, a single informed weather trader could move this price sharply before June 9 morning.

• The 1-hour change of 0.0% and trend score of 50.45 signal a market in equilibrium, waiting on forecast updates rather than reacting to a catalyst.
• The 24-hour drift lower from $0.40 to $0.37 suggests mild conviction that 78-79°F is slightly overpriced relative to the adjacent brackets.
• Liquidity at $19,591 provides price stability for now, but thin volume means any National Weather Service update for South Florida could trigger fast repricing.
• Open interest is listed at $0, which reinforces that this is a short-duration market with positions being opened and closed quickly rather than held.
• The trader sentiment breakdown is 36.5% YES and 63.5% NO, consistent with the view that hitting any specific two-degree window is harder than missing it.

Lines Analysis: Miami’s June Climate and the Narrow Window Problem

Here’s what the measurements are telling us. Miami’s historical average overnight low in early June sits in the upper 70s Fahrenheit, centered near 77-78°F based on long-term climatological normals. The 78-79°F bracket sits right at the warm edge of that average range. A standard early-June night with typical Atlantic flow and no strong high-pressure intrusion would plausibly land in this bracket or the one just below it. That is why the market put it at the top.

What makes NO real is bracket math. Even if 78-79°F is the single most likely two-degree window, eleven outcomes exist. The probability mass across 76-77°F and 80-81°F alone likely rivals or exceeds the primary bracket. A warmer-than-average night driven by a persistent southwesterly flow or an early June heat event could push the low into the 80-81°F bracket. A modest frontal boundary brushing South Florida, not uncommon in early June, could slide the low toward 76-77°F. The data doesn’t care about the politics of which bracket is most elegant. It cares about synoptic-scale weather patterns over the Straits of Florida on the night of June 8-9.

• The National Weather Service Miami forecast area will update overnight low predictions for June 9 through June 8 evening. Any revision toward 80°F or above would pressure the primary outcome lower.
• A strengthening Bermuda High over the western Atlantic would keep overnight lows elevated, supporting the 80-81°F or higher brackets.
• A weak trough or frontal boundary approaching from the north would favor the 76-77°F bracket and drain probability from the primary outcome.
• Dew point readings at Miami International Airport through June 8 provide a real-time signal. Dew points above 74°F overnight suppress radiative cooling and support warmer lows.
• Any Tropical Weather Outlook activity in the Gulf or Caribbean increasing Atlantic moisture flow would push overnight lows warmer.

Total volume at $2,630 is thin enough that this market is better read as a probabilistic weather forecast than a deeply informed trader consensus. The data leans toward 78-79°F as the modal outcome, but the confidence interval is wide. The adjacent brackets at 76-77°F and 80-81°F are collectively the stronger bet against the primary outcome resolving YES.

LINES VERDICT

NARROW WINDOW, WIDE RISK

The 78-79°F bracket is the right place to start, but two degrees is a thin target in a city where overnight lows in early June can swing three to five degrees based on cloud cover, wind direction, and moisture. The market is pricing this correctly as uncertain.

What the market says: At 36.5% implied probability, the market gives the primary outcome roughly one-in-three odds. That is consistent with a modal outcome in a multi-bracket distribution. Volume below $1 million means this price can shift fast if the June 9 NWS forecast firms up before resolution at noon.

Key unknown: The National Weather Service Miami Area Forecast Discussion published on the evening of June 8 is the single data point that would reprice this contract most sharply. A forecast low of 80°F or above would drain the 78-79°F bracket significantly.

Scientific Context: Miami’s Early June Temperature Profile

Miami’s climate in early June is defined by the transition into its wet season. The Intertropical Convergence Zone pushes northward, Atlantic sea surface temperatures warm, and overnight lows become less variable than in winter. The average overnight low near June 9 historically clusters in the 76-78°F range at Miami International Airport. The 78-79°F bracket sits at the warm end of that climatological center, which explains its top-ranked position. But year-to-year variability is real. Anomalously warm nights above 80°F occur when upper-level ridging traps heat overnight. Cooler nights in the mid-70s occur when a weak front or drier continental air briefly intrudes. The market’s 36.5% estimate reasonably reflects that the modal bracket is probable but not dominant.