Miami Lowest Temp May 7: Will 76-77°F Hold?

The 76-77°F band is leading Miami’s lowest temperature market for May 7, sitting at 44.5% implied probability. But traders pushed that price up 18% in the last 24 hours, which means something shifted. The question is whether current atmospheric conditions actually support that band or whether the market is running ahead of the data.

This is a short-fuse contract. Resolution hits at 2026-05-07 12:00:00, which means the overnight low is the decisive reading. Miami’s overnight minimums in early May typically cluster in the mid-to-upper 70s, but local sea surface temperatures, onshore flow patterns, and overnight cloud cover can all nudge a reading by two or three degrees. That nudge is exactly what traders are trying to price.

How the Contract Works: Temperature Bands and Official Readings

The market resolves on the officially recorded lowest temperature at a Miami weather station on May 7, 2026. The primary outcome, YES, pays if the lowest reading falls between 76 and 77 degrees Fahrenheit. A string of alternative bands covers the full range from 71°F or below up to 90°F or higher.

• YES (76-77°F): 0.45 implied price, 44.5% probability. The favored band in a crowded field.
• NO (any other band): 0.56 implied price, 55.5% probability. Covers ten other temperature ranges.

The NO side is not a single bet. It is a composite of every other outcome combined. Missing 76-77°F by even one degree in either direction sends the contract to a different band. The 74-75°F and 78-79°F bands are the nearest neighbors, and either one becomes a NO resolution for this specific contract. NOAA’s Miami surface observation network provides the official reading used for resolution.

Momentum and Market Signals: A Sharp 24-Hour Move

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The 24-hour price change of plus 18.0%, a flat one-hour reading, and a trend score of 49.41 together describe a market that surged and then steadied. The driver almost certainly is updated National Weather Service forecast data for Miami overnight on May 6 into May 7. When a short-duration weather market moves 18% in a day, a forecast update is the most plausible cause.

Total volume sits at $13,506, with $7,811 of that trading in the last 24 hours. Liquidity is $29,421. This is a thin market. Volume well below $1 million means a single reasonably sized bet can reprice the contract meaningfully. The current 44.5% probability reflects conviction, but it is fragile conviction. One updated forecast model or a late-day temperature shift in Miami changes the math fast.

• The 18% 24-hour jump points to a specific forecast catalyst, most likely an NWS Miami area forecast update aligning conditions with the 76-77°F band.
• The flat one-hour reading since that move suggests traders are waiting rather than chasing, a signal the initial catalyst has been absorbed.
• Thin liquidity means a follow-on bet of even a few hundred dollars moves the price noticeably, so treat current pricing as directional rather than precise.
• The trend score of 49.41 is near the midpoint, consistent with a market that has moved but not committed fully to one side.
• Related markets, including the 2026 hottest year ranking at 58% and large eruption tracking at 54%, share no direct correlation with a 24-hour Miami temperature reading.

Lines Analysis: What the Data Favors for Miami on May 7

Miami’s early May climatology strongly supports overnight lows in the upper 70s. The city’s proximity to Biscayne Bay and persistent Atlantic onshore flow keep overnight temperatures from dropping into the lower 70s during this period. The National Weather Service consistently shows Miami’s May overnight averages sitting right at the boundary of the 76-77°F and 78-79°F bands. If the forecast shows a typical onshore pattern without a cold push, the 76-77°F outcome is reasonable, but so is 78-79°F.

Missing the 76-77°F band on the high side is the more plausible failure mode. A warm and humid airmass, elevated sea surface temperatures in Biscayne Bay, or heavy overnight cloud cover all trap heat and push the reading toward 78°F or higher. The 78-79°F band becoming the actual low would flip this contract to NO without any dramatic weather event. No cold front is needed to invalidate the YES outcome. A slightly warmer-than-average marine layer is enough.

• NWS Miami’s next forecast update for May 7 overnight temperatures is the single most important signal to watch before resolution.
• Any mention of an approaching cold front or strong offshore flow would push probability toward the lower bands, 74-75°F or 72-73°F.
• Elevated sea surface temperatures in the Florida Straits favor lows at or above 78°F, threatening the YES band from the warm side.
• Cloud cover forecasts matter: clear nights radiate heat and can cool Miami toward the lower end of the range; overcast nights hold temperatures up.
• A morning low reading published by NOAA’s Miami station before the resolution deadline at 12:00 on May 7 is the final data point that settles everything.

The data broadly supports the upper-70s range for Miami in early May. Whether that lands at 76-77°F or 78-79°F is a one-to-two degree question, and the $13,506 in total volume reflects how thin the confidence is. The 44.5% probability on 76-77°F is consistent with a leading band in a multi-outcome market, not a heavy favorite in a binary bet.

LINES VERDICT

Plausible Leader, Not a Lock

The 76-77°F band earns its lead position based on Miami’s climatological baseline for early May, but the warm-side risk from marine temperatures makes 78-79°F a credible spoiler. The market’s 18% single-day move captured a forecast signal; the next NWS update determines whether that signal holds.

What the market says: The 44.5% probability marks 76-77°F as the most likely single outcome in a ten-plus-band field, but over half the market money says the actual low lands somewhere else. Thin liquidity means that number can shift sharply before the 2026-05-07 12:00:00 resolution cutoff.

Key unknown: The National Weather Service Miami overnight low forecast for May 7 is the controlling variable. Any model shift toward warmer marine influence or an unexpected clear-sky cooling window would reprice this contract before resolution.

Scientific Context: Miami Temperature Patterns in Early May

Miami’s May climate sits at the front edge of the wet season transition. Average overnight lows for early May historically fall between 72°F and 78°F depending on synoptic conditions. The Atlantic sea surface temperatures surrounding South Florida typically run one to two degrees above the long-term average during current La Nina-to-neutral transition conditions, which biases overnight lows slightly warmer than the historical median. That bias supports the upper half of the plausible range, which is 76°F and above. The 44.5% YES price on the 76-77°F band is roughly consistent with what climatology would suggest as the modal outcome for this date, but the distribution is wide enough that adjacent bands hold real probability mass before the 2026-05-07 12:00:00 close.

Frequently Asked Questions

• What does 44.5% probability mean here? It means the market assigns a roughly one-in-two chance that Miami’s official lowest temperature on May 7 falls between 76 and 77 degrees Fahrenheit, based on current bets and forecast data.
• What happens if I hold the NO contract? The NO contract pays out if any outcome other than 76-77°F is the official recorded low, covering nine other temperature bands from 71°F or below up to 90°F or higher.
• What data point would move this market most? An updated National Weather Service Miami forecast showing overnight lows clearly in a different band, either warmer toward 78-79°F or cooler toward 74-75°F, would reprice the contract quickly given thin liquidity.
• When does this market resolve? Resolution occurs at 2026-05-07 12:00:00, using the officially recorded lowest temperature from a Miami NOAA station for May 7.
• Is the $13,506 volume enough to trust the price? Volume this low means the current 44.5% probability is directionally useful but not deeply reliable. A single new bet can shift the price noticeably, so treat the probability as a rough estimate rather than a precise market consensus.

This analysis reflects market conditions as of 2026-05-06 09:13:56. Prediction market probabilities are volatile and shift as new data and regulatory decisions emerge, especially as the 2026-05-07 12:00:00 resolution date approaches. Lines.com does not accept bets or provide financial or gambling advice. All market outcomes are uncertain.