Miami July 6 High Temp: Can 90-91°F Hold at 52%?

Miami sits in peak heat season, and the market is pricing genuine uncertainty about where the thermometer lands on July 6. The 90-91°F band holds a 52% implied probability, a slim majority that reflects how tight these temperature windows are in a city where a passing afternoon storm can shave three degrees off a daily high. Here’s what the measurements are telling us: tropical moisture, sea surface temperatures in Biscayne Bay, and synoptic pressure patterns all shape that number, and right now none of them are decisively pushing outside this range.

The market question asks for the highest temperature recorded in Miami on July 6, 2026, resolving at 12:00 UTC on that date. The YES price sits at 0.52 against a NO price of 0.48, with total volume at $6,506 and liquidity at $40,446. Volume is thin. That $6,506 figure means a single mid-sized trade can reprice this contract sharply before resolution.

How the 90-91°F Contract Works

A YES resolution requires Miami’s official daily high temperature on July 6 to fall between 90°F and 91°F, inclusive. The contract resolves against official meteorological data. Every two-degree band from 79°F or below up to 98°F or higher is its own separate contract, so traders are betting on a specific slice, not just a direction.

• YES (90-91°F): 0.52, implying a 52% probability the daily high lands in this two-degree band.
• NO (any other range): 0.48, implying a 48% probability the high falls outside 90-91°F.

A NO outcome pays when Miami’s high goes above 91°F or below 90°F on July 6. July in Miami averages highs in the low-to-mid 90s, which means the 92-93°F band and even the 94-95°F band carry real probability mass. An organized afternoon thunderstorm, a common July occurrence in South Florida, can suppress the daily max by knocking out solar insolation during peak heating hours. The data doesn’t care about the politics of whether it storms: cloud cover is the primary physical mechanism that could keep the high in the 90-91°F window rather than pushing toward 93°F or higher.

Sponsored Partner

Momentum and Market Signals

The momentum composite here is modest. The trend score registers 40.47, the 1-hour price change is flat at 0.0%, and 24-hour data is unavailable for comparison. What the price history does show is a significant move on July 4, when the contract climbed roughly 34 cents from its opening price to current levels. That move reflects traders pricing in the proximity of resolution and refining their reads on near-term Miami weather forecasts.

Total volume is $6,506, all of it concentrated in the last 24 hours. Liquidity at $40,446 is comparatively deep for the volume traded, which means the order book is not empty, but it also means this market has not attracted heavy capital. Thin volume below $1M means the price can move sharply on any new trade or updated forecast signal before the July 6 resolution.

• The trend score of 40.47 is below neutral, pointing to mild bearish momentum against the current 52% YES price.
• The 1-hour price change is flat, suggesting the market is in a holding pattern pending fresher forecast data.
• The July 4 price surge of approximately 34 cents reflects traders entering the market as the resolution date came into view, not a fundamental shift in meteorological conditions.
• Liquidity at $40,446 is adequate but volume is very thin, meaning any single trade above a few hundred dollars moves the price meaningfully.
• The 52%/48% split reflects genuine uncertainty, not a consensus call, and that split narrows as resolution approaches and forecast models converge.

Lines Analysis: Miami’s July Temperature Distribution

The 90-91°F band as the leading outcome makes meteorological sense as a starting point. Miami International Airport, the standard observation site for official daily highs, records July highs that cluster between 90°F and 95°F in most years. The 90-91°F band captures the lower end of that cluster. A July 6 high landing there requires either a moderating onshore flow, early cloud development, or a storm system that limits afternoon heating. National Weather Service forecast model output for South Florida through early July shows no strong synoptic pattern locked in that would guarantee temperatures above 93°F or suppress them below 90°F.

The risk to the 90-91°F outcome runs in both directions. A stronger high-pressure ridge over the Atlantic would suppress convection and push afternoon temperatures toward 93°F or higher, which would resolve this contract NO and reward traders holding the 92-93°F or 94-95°F bands. Conversely, an early afternoon sea breeze convergence triggering organized convection could cap the high near 89°F, also a NO outcome. The specific two-degree window means the distribution of outcomes is wide relative to the probability assigned to this single band.

• National Weather Service Miami forecast: monitor the 7-day high temperature forecast for July 6 specifically, any shift above 92°F or below 90°F directly reprices this contract.
• Sea surface temperatures in the Florida Straits and Biscayne Bay: elevated SSTs increase atmospheric moisture and afternoon storm potential, which can suppress daily highs.
• Atlantic high-pressure ridge position: a westward extension of the subtropical high suppresses convection and raises daytime highs toward the 93-95°F range.
• Morning model runs from GFS and European ECMWF: watch for convergence or divergence on July 5 evening runs, which will be the last major forecast update before resolution.
• Historical July 6 Miami highs: if July 6 has historically skewed toward the low-to-mid 90s, that shifts probability weight toward the 92-93°F band over the 90-91°F band.

With $6,506 in total volume, this market reflects retail-level interest rather than institutional conviction. The data slightly favors the 90-91°F band as the most probable single outcome in a fragmented field, but a two-degree window in Miami July weather is genuinely narrow. Any single NWS forecast revision for July 6 will reprice this contract before the 12:00 UTC resolution.

LINES VERDICT

NARROW FAVORITE IN A FRAGMENTED FIELD

The 90-91°F band leads because it captures the lower end of Miami’s typical July high range, and July storm activity could suppress afternoon temperatures into that window. But a two-degree target in South Florida summer is a precise ask, and the competing bands carry real probability mass.

What the market says: At 52%, the market is pricing this as a slight favorite with genuine uncertainty on both sides. Thin volume below $1M means the price is volatile and a single forecast update before the July 6 resolution date could shift it materially.

Key unknown: The National Weather Service evening model runs on July 5 are the single most important data input. A forecast high of 92°F or above on those runs would shift probability weight toward the 92-93°F band and away from this contract.