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Miami High Temp July 2: 90-91°F Leads at 57.5%

Miami High Temp July 2: 90-91°F Leads at 57.5%

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SR Sofia Renard Climate & Science Analyst
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Lines Verdict
YES at 58% implied probability

LEAN YES: The 90-91°F band aligns with Miami's July median and current NWS forecast signals. Market probability: 57.5%.

58% Market Probability
1h +1.0% 24h +38.0% Trend Moderate (54/100)
Volume
$28.8K
$28.8K in 24h
Liquidity
$42.4K
Moderate depth
Time Left
15 hours
Resolves Jul 2
29K Vol. Jul 2, 2026
90-91°F $3K Vol.
58%
92-93°F $3K Vol.
23%
88-89°F $7K Vol.
14%
86-87°F $2K Vol.
2%
84-85°F $5K Vol.
1%
94-95°F $2K Vol.
1%

The National Weather Service forecast for Miami on July 2 has been doing the heavy lifting here. A market that opened at $0.20 for the 90-91°F outcome closed yesterday at $0.58, a 28-point move driven entirely by traders reading the same NWS 7-day forecast. The 90-91°F band now sits at 57.5% implied probability. That is a meaningful majority, but it is not a lock. Miami’s July highs scatter across a 10-degree range depending on cloud cover, sea breeze timing, and whether a shower clips the station before the afternoon peak.

The market question asks for the single highest temperature recorded in Miami on July 2, 2026. The contract resolves at noon on July 2. The 90-91°F outcome is priced at $0.58 YES / $0.43 NO. Total volume sits at $28,809, with $28,814 traded in the last 24 hours, which means this market is essentially brand new. Liquidity stands at $42,384.

How the Miami Temperature Contract Works

A YES resolution requires the official high temperature recorded at Miami’s primary weather station to fall exactly within the 90-91°F range on July 2, 2026. The National Weather Service or an equivalent official source determines that reading. The contract resolves at noon on July 2, meaning the official daily high must be logged and confirmed before that cutoff.

  • YES (90-91°F): $0.58 — 57.5% implied probability. The market favors a high landing in this two-degree band.
  • NO (any other outcome): $0.43 — 42.5% implied probability. This covers eight other outcome bands plus extremes.

The NO side wins if Miami’s high falls outside the 90-91°F window entirely. The 92-93°F band is the primary competitor, reflecting the real possibility that above-normal heat pushes the reading two degrees higher. The 88-89°F band becomes relevant if afternoon clouds or an early shower keeps the mercury lower than the NWS forecast. Miami records its official daily high at Miami International Airport, and a sea breeze arriving early or a convective cell passing through the late afternoon can trim or alter the peak by two to three degrees.

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Momentum and Market Signals

The momentum composite here is simple: flat in the last hour, no 24-hour comparison available, and a trend score of 37.21. The signal is consolidation after yesterday’s sharp move. Traders pushed this outcome from $0.20 to $0.58 on June 30 when the NWS forecast for July 2 became available in the 7-day window. The market has not moved since, which means the current forecast is holding.

Total volume of $28,809 on a market that opened yesterday tells you this is a thin, short-duration weather contract. The $42,384 in liquidity is modest. Volume below $1 million means a single large bet could reprice this contract sharply, especially if a new NWS forecast or model run shifts the predicted high by two or more degrees. Treat the 57.5% figure as a read of the current forecast, not a deep consensus signal.

Key Factors

  • The 1-hour price change is flat at 0.0%, signaling no new forecast information has entered the market in the last hour.
  • The 24-hour move of roughly 28 percentage points originated from a specific NWS forecast for July 2 entering the available forecast window.
  • Miami’s climatological July high averages near 91°F, placing the 90-91°F band squarely in the center of the historical distribution.
  • A sea breeze developing before 2 PM local time on July 2 would suppress the high by one to three degrees, pushing probability toward the 88-89°F band.
  • An above-normal ridge or heat advisory condition would shift probability toward 92-93°F or higher.

Lines Analysis: What the Miami Forecast Is Pricing

The data doesn’t care about the politics, and here the data is straightforward: the NWS forecast for July 2 in Miami is likely sitting near 90-91°F, and traders locked that in yesterday. Miami International Airport sits at sea level in a subtropical climate where July highs follow a tight distribution. The 90-91°F band captures the median outcome. The market is pricing that median with moderate conviction.

Here’s what the measurements are telling us about the NO side: the 92-93°F band is the most dangerous competitor. Miami has recorded highs at or above 92°F on more than a third of July days historically. A heat advisory from NWS Miami or a morning forecast update showing a stronger upper-level ridge would shift probability toward that band quickly. The 88-89°F scenario requires afternoon convection or early sea breeze, which is common in July but harder to predict at 24-hour range.

Signals to Monitor

  • The NWS Miami morning forecast package on July 2 is the single most important input. Any change in the high temperature forecast reprices this contract immediately.
  • A heat advisory issuance from NWS Miami for July 2 would push probability toward 92-93°F and higher bands at the expense of 90-91°F.
  • ASOS observations at Miami International Airport in the mid-afternoon on July 2 will determine resolution. Watch the 2-5 PM local time window for the daily peak.
  • Afternoon convective activity, common in Miami July afternoons, can cap the high unexpectedly. A line of storms before 4 PM would favor the 88-89°F band.
  • Model consensus from the GFS and NAM at the 12-18 hour range on July 2 morning will show whether the sea breeze sets up early or late.

The market is pricing uncertainty, not science, and here the uncertainty is genuinely meteorological. The $28,809 in total volume reflects a very new, very thin market built almost entirely on one NWS forecast. If that forecast shifts by two degrees in the morning update on July 2, this market will move. The data currently favors 90-91°F, but the competing bands are close enough that no single outcome is a certainty.

LINES VERDICT

LEAN YES, LOW CONFIDENCE

The 90-91°F band aligns with Miami’s climatological July median and the current NWS forecast trajectory. The sharp price move from open to current reflects real forecast information entering the market, not noise.

What the market says: A 57.5% implied probability means the market sees this as more likely than not, but barely. With resolution on July 2 and thin volume, any forecast update before market close could swing this by 10 to 20 percentage points.

Key unknown: The NWS Miami morning forecast package on July 2 is the single event that will reprice this contract. A two-degree shift in the predicted high, up or down, moves the probability majority to a different outcome band entirely.

Frequently Asked Questions

It means the market estimates a 57.5% chance Miami's official high on July 2 falls exactly in the 90-91°F range. Eight other outcome bands share the remaining 42.5% probability.

Any official Miami high outside the 90-91°F band on July 2 resolves as NO. The 92-93°F and 88-89°F bands are the most likely NO outcomes based on current market pricing.

The NWS Miami morning forecast on July 2 is the key data point. A two-degree shift in the predicted high would likely move probability majority to an adjacent outcome band.

The contract resolves at noon on July 2, 2026. The official daily high must be recorded and confirmed at Miami International Airport before that cutoff.

Total volume is $28,809, which is thin. Low volume means a single large bet can reprice this contract sharply. Treat the probability as a forecast read, not deep market consensus.

We aggregate the live positions of the top 50 Polymarket whales (ranked by 30-day tracked volume) into one composite reading per market. It refreshes every hour. The percentage shows how many of those whales hold YES versus NO; the net dollar position shows the cohort's directional exposure in dollars.

A convergence event fires when three or more tracked wallets buy the same outcome on the same market within a four-hour window. We surface these in the activity feed and the VIP digest.

No. Lines is an editorial and data product. We do not operate prediction markets, custody funds, or accept trades. All trade flows deep-link to Polymarket via our affiliate code. Probabilities shown are market-implied and not predictions or recommendations.

What Could Shift These Probabilities?

Forecast Holds, Median Day Confirmed

The NWS Miami morning update on July 2 maintains a high near 91°F with no heat advisory. Skies are partly cloudy and the sea breeze arrives on schedule in the mid-afternoon. Miami International Airport records its peak reading between 2 and 4 PM in the 90-91°F window, resolving the contract YES with minimal last-minute repricing.

Ridge Builds, High Pushes to 92-93°F

An upper-level ridge strengthens overnight July 1, and the NWS Miami morning package upgrades the July 2 forecast to 93°F. A heat advisory is issued for Miami-Dade County. The official high reaches 92 or 93°F, shifting probability entirely to the 92-93°F band and resolving the 90-91°F contract as NO.

Afternoon Storms Cap the Reading at 88-89°F

A convective complex develops ahead of schedule on the morning of July 2, bringing cloud cover and an early sea breeze to Miami. The official high peaks at 88 or 89°F before afternoon storms fully develop. The 90-91°F band resolves NO, and traders who bought the 88-89°F outcome collect.

Tropical Disturbance Changes Everything

A fast-developing tropical disturbance in the Florida Straits brings unexpected cloud cover, rain, and wind to Miami on July 2. The official high drops below 88°F, collapsing probability across the top three bands simultaneously. Thin liquidity means the repricing is sharp and rapid, catching most current holders off-side.

Key macro factor: Weak El Nino or ENSO-neutral conditions in mid-2026 support near-normal South Florida summer temperatures, consistent with the 90-91°F band being the most likely single outcome.

Market Timeline

1:02 AM
Market Created
1:02 AM
Market Opened
12:00 PM
Market Resolution

Market Comments

Probabilities shown are market-implied and not predictions or recommendations. This content is for informational purposes only.