Miami July 7 Low Temp: Will 78-79°F Hit?

Miami in July doesn’t cool down much. The city’s overnight lows hover stubbornly in the upper 70s to low 80s, driven by Atlantic moisture, residual heat from concrete and pavement, and a sea breeze pattern that rarely delivers real relief. The market has landed on 78-79°F as the most likely overnight low for July 7, pricing that outcome at 40%. That’s a meaningful lead over every other bracket, but it’s not dominance.

The market question asks: what is the lowest temperature recorded in Miami on July 7, 2026? The 78-79°F bracket sits at $0.40 YES and $0.60 NO, implying a 40% probability. The market closes at 12:00 PM ET on July 7, 2026. Total volume stands at $3,429 — an extremely thin market where a single large trade can move the price sharply.

How the Miami July 7 Low Temperature Contract Works

This contract resolves based on the official lowest temperature recorded in Miami on July 7, 2026. The National Weather Service Miami office tracks official surface temperature readings for the area. Each temperature bracket is a separate contract. The 78-79°F bracket pays out if the official low falls within that two-degree window.

• 78-79°F (YES): $0.40 per share, implying 40% probability — the leading bracket.
• 80-81°F (YES): A competing bracket reflecting warmer overnight conditions tied to persistent humidity and heat retention.
• 76-77°F (YES): A cooler outcome possible if a weak front or increased cloud cover suppresses the low slightly.
• 82-83°F and higher brackets: Reflect the scenario where Miami’s heat dome holds firm through the night.

A NO outcome on the 78-79°F bracket means the actual low lands outside that window — either cooler (76-77°F or below) or warmer (80°F or above). Miami’s July lows rarely drop below 75°F. The National Weather Service Miami data shows the city’s July overnight lows cluster heavily between 77°F and 82°F, so the real competition is between adjacent brackets, not extreme outliers.

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Momentum and Market Signals

The momentum composite is essentially flat. The 1-hour price change is 0.0% and the trend score of 52.96 sits right at neutral. No significant directional conviction has entered this market. The most likely driver of any price movement before resolution will be National Weather Service forecast updates published in the 24 to 48 hours before July 7.

Total volume is $3,429, with all of that volume arriving in the past 24 hours. Liquidity sits at $14,475 against zero open interest. The volume figure is well below $1 million. This is a very thin market. A single trader placing a few hundred dollars can shift the implied probability by several points. Treat current pricing as directional, not precise.

• The 78-79°F bracket holds a 40% implied probability — the single largest share among all competing brackets, reflecting historical Miami July low temperature clustering in this range.
• The 1-hour price change is flat at 0.0%, signaling no new weather data or forecast updates have moved the market in the past hour.
• The 24-hour volume of $3,429 represents the entirety of trading activity. No sustained accumulation in any bracket is visible.
• Competing brackets (80-81°F and 76-77°F) represent the most credible alternatives. Any National Weather Service forecast shift toward a warmer or cooler night would directly pressure the 78-79°F position.
• Thin liquidity means this market is susceptible to sharp moves on updated NWS short-range forecasts, particularly the 24-hour and 12-hour outlooks published before resolution.

Lines Analysis: What the Miami Temperature Data Supports

The 78-79°F bracket leads because it sits squarely in Miami’s climatological sweet spot for July overnight lows. The National Weather Service historical data for Miami shows July lows most frequently landing in the 77°F to 80°F range. The two-degree 78-79°F window captures a substantial share of that historical distribution. No extreme weather pattern is needed for this bracket to resolve — just a typical South Florida summer night.

The warmer brackets (80-81°F and above) become competitive when persistent onshore flow, elevated dew points, and reduced cloud-clearing after sunset keep the city from losing daytime heat. The cooler brackets (76-77°F and below) need something disruptive: a passing squall line that clears humidity, an unusual dry air intrusion, or a stronger-than-normal sea breeze. Neither scenario is impossible in early July, but neither is the base case.

• National Weather Service Miami: any forecast update showing overnight lows in the 80°F+ range would pressure the 78-79°F bracket lower and lift warmer brackets.
• NWS short-range forecast for July 6 to 7: the 12-hour and 24-hour outlooks are the most important pre-resolution data points to watch.
• Dew point and moisture readings: elevated Atlantic moisture trapped over South Florida supports warmer overnight lows and would benefit the 80-81°F bracket.
• Any tropical disturbance or organized convection near South Florida: could alter the overnight temperature trajectory in either direction depending on track and timing.
• Satellite and surface obs from Miami International Airport: the official NWS observation point. Temperature changes there directly determine resolution.

The $3,429 total volume reflects a market driven by a small number of traders. The data favors the 78-79°F bracket as the single most likely outcome, but with roughly 60% of probability distributed across other brackets, the market is explicitly pricing meaningful uncertainty. Here’s what the measurements are telling us: Miami’s July nights are warm, predictable in range but not in the exact two-degree window. The market is pricing uncertainty, not science.

LINES VERDICT

LEADING BRACKET, UNCERTAIN WINDOW

The 78-79°F bracket holds the top position for good climatological reasons, but Miami’s July lows span a wide enough range that adjacent brackets carry real probability. The data doesn’t care about the politics — it just says the window is plausible, not locked in.

What the market says: At 40% implied probability, the 78-79°F bracket is the market’s best single guess, but the majority of probability mass sits elsewhere. With resolution on July 7, 2026, any updated NWS forecast in the next 24 hours could reprice this contract quickly given the thin volume.

Key unknown: The National Weather Service Miami 12-hour overnight forecast for July 6 to 7 is the single data point that will most clearly define which bracket deserves more weight before this market closes.

Scientific Context: Miami July Temperature Patterns

Miami’s July overnight lows are among the most stable of any major U.S. city. The Atlantic Ocean moderates extreme cooling while also preventing lows from dropping far below 75°F. The urban heat island effect from Miami-Dade’s dense development raises overnight temperatures measurably above surrounding rural areas. Historical July data from Miami International Airport shows lows concentrating in the 77°F to 81°F band, with the 78-79°F range capturing a plurality of observations. Departures above 83°F or below 74°F are rare but not impossible during anomalous synoptic setups. Before July 7, the NWS forecast trend and any significant moisture or wind shift pattern are the variables most likely to reprice the competing brackets in this market.