Miami June 29 Low Temp: Will It Land at Eighty to Eighty-One?

Miami sits in the heart of its most humid stretch of the year, and the overnight low on June 29 is one of the tightest calls on the board right now. The market has settled on 80-81°F as the most likely low, with a 57.5% implied probability. That is a modest plurality in a field of ten possible outcome bands, which tells you something important: this is a probability play, not a sure thing.

The market question asks where Miami’s lowest recorded temperature will fall on June 29, 2026, resolving at noon on that date. The 80-81°F band trades at $0.58 YES and $0.43 NO. Total volume has hit $12,054, with $11,101 of that arriving in the last 24 hours. This is a short-fuse weather market, and the late money is driving conviction.

How the Contract Works: Picking Miami’s Overnight Floor

YES on this contract pays out if Miami’s official lowest temperature on June 29 falls between 80°F and 81°F, inclusive. The resolution source is market resolution, so the final reading from the designated weather station determines the outcome. The contract closes June 29 at noon local time.

• 80-81°F YES: $0.58 price, 57.5% implied probability. The market’s top pick for Miami’s overnight low.
• 82-83°F: Second-tier outcome, covering a warmer overnight scenario.
• 78-79°F: Cooler outcome, possible if any boundary layer mixing occurs overnight.
• 84-85°F and above: Tail outcomes reflecting extreme overnight warmth.
• 77°F and below: Deep tail outcomes essentially priced near zero given June climatology.

For the 80-81°F band to miss, Miami’s overnight low needs to settle outside that two-degree window entirely. The most realistic competing outcome is 78-79°F on the cooler side or 82-83°F on the warmer side. Miami in late June rarely sees overnight lows drop below 78°F, and lows above 83°F require unusually stagnant, warm air masses with no sea breeze effect. The market is saying neither extreme is likely, but neither is impossible.

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Momentum and Market Signals: Late Money Moves Fast

The trend score sits at 54.09, pointing to mild bullish lean on the 80-81°F band. The 1-hour price change is flat at 0.0%, suggesting the market has found a short-term equilibrium. The 24-hour data is unavailable as a clean directional read, but the volume pattern tells the real story: nearly all of the $12,054 in total volume arrived in the last 24 hours, meaning this market came alive as the forecast window tightened.

Liquidity is $29,601, which is healthy for a short-dated weather contract. Volume at $12,054 is below the $1 million threshold, so price can move sharply on any updated forecast data or a sudden shift in the NWS advisory. One well-placed trade could reprice the leading outcome band by several cents.

• 1h and 24h momentum: Flat on the hour, late-stage volume surge in the past day signals traders locking in positions as the resolution window closes.
• Liquidity depth ($29,601): Adequate for this market size, but thin enough that a single large order moves the price.
• Volume concentration: $11,101 of $12,054 total volume arrived in 24 hours, a classic short-fuse weather market pattern.
• Field fragmentation: Ten outcome bands split the probability, which structurally suppresses any single band above 60% even when consensus is strong.
• Resolution proximity: The contract closes June 29 at noon. Any NWS update or model run tonight shifts the calculus immediately.

Lines Analysis: Miami’s Overnight Low in Late June

Miami’s climatology strongly supports overnight lows in the 79-82°F range during late June. The urban heat island effect in Miami keeps overnight lows elevated relative to rural South Florida. The 80-81°F band sits right at the climatological sweet spot for this time of year, which is why the market is pricing it as the plurality winner. NWS Miami forecasts for late June typically show overnight lows in the low 80s, and the current synoptic pattern, with high moisture levels and light winds, favors that outcome.

What makes the 80-81°F band beatable is the sea breeze cycle. On nights when the Bermuda High weakens and onshore flow picks up, Miami’s overnight low can drop toward 78-79°F. Conversely, if a stagnant air mass locks in and suppresses overnight cooling, the low can stay at 82-83°F or above. Neither scenario requires unusual weather, just normal variability within Miami’s late June envelope. That variability is exactly what the market is pricing.

• NWS Miami forecast update tonight: Any revision to the overnight low forecast shifts the leading band’s probability directly.
• Sea breeze timing and strength: A stronger-than-expected onshore flow pushes the low toward 78-79°F.
• Upper-level pattern: A weakening ridge over the Gulf allows more mixing and cooler lows.
• Urban heat retention: Persistent cloud cover overnight traps heat, supporting the 82-83°F band.
• Model consensus: GFS and Euro agreement on the overnight low narrows uncertainty and reinforces the leading band.

The $12,054 in total volume is modest, but the late-stage concentration signals informed traders watching the forecast closely. The data favors the 80-81°F band as the plurality outcome, but this is a two-degree window in a market that can be decided by a single degree of overnight cooling. The NWS Miami 11 PM advisory is the single most important input before resolution.

LINES VERDICT

MODERATE LEAN: EIGHTY TO EIGHTY-ONE DEGREES

Miami’s late June climatology and the current high-moisture pattern align with the 80-81°F band as the most probable overnight low. The market is pricing the climatological center of mass correctly, but a two-degree resolution window means normal variability can flip the outcome.

What the market says: At 57.5% implied probability, the 80-81°F band holds a meaningful plurality over nine competing outcomes. This is not high conviction. The market is pricing uncertainty across a fragmented field, and thin volume means any forecast update tonight reprices the contract fast.

Key unknown: The NWS Miami late-evening forecast advisory, and whether overnight model runs show any shift in the low temperature estimate for June 29. A one-degree change in the official forecast moves this market.