NYC May 15 Low Temp: Will It Hit 54-55°F?

A single two-degree band is on the table, and the market has assigned it a one-in-five shot. The contract asks whether New York City’s lowest temperature on May 15, 2026, lands specifically in the 54-55°F range. With ten possible outcome bands spanning 41°F or below all the way to 60°F or higher, a 21% probability on any single band is actually meaningful. The real question is whether mid-May NYC weather patterns support that narrow window, or whether the low slips a few degrees in either direction.

Here’s what the measurements are telling us: mid-May in New York typically sees overnight lows in the low-to-mid 50s, with the 30-year climate normal for May 15 sitting close to 53°F. The 54-55°F band sits right at the top of that normal range. A warmer-than-average airmass would push the low above 56°F, while any Canadian air intrusion would drag it below 52°F. The 10-outcome structure of this contract means the market is distributing probability across a wide ladder, and 21% is a reasonably honest placement for the modal bin.

How the NYC May 15 Low Temperature Contract Works

This contract resolves YES if the verified lowest temperature recorded in New York City on May 15, 2026, falls between 54°F and 55°F inclusive. Resolution occurs at 2026-05-15 12:00:00, using official weather measurement data as the determining source. Every other temperature band is a separate market running in parallel.

• YES (54-55°F): Price 0.21, implied probability 21%. Pays out if NYC’s May 15 low lands in this two-degree window.
• NO (all other outcomes): Price 0.79, implied probability 79%. Covers any reading outside the 54-55°F band, from 41°F or below up to 60°F or higher.

The NO side wins across nine separate temperature outcomes. A low of 53°F, 56°F, or any other reading outside the target band settles NO. With ten bins total, the collective NO probability of 79% reflects the simple math that eight alternative outcomes each claim their own slice of the distribution. The barrier here is not a dramatic weather event. A shift of just two degrees in either direction, well within normal forecast uncertainty at three days’ range, lands the contract in a different bin entirely.

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Momentum and Market Signals

The momentum composite on this contract points to a market that briefly woke up and then went quiet. The trend score of 25.72, combined with a 24-hour price change that lacks a prior reference point and a flat one-hour reading, signals that the 10-point price jump logged on May 11 was likely a single trader repricing the bin as medium-range forecasts came into view. Nothing has moved the contract since that adjustment.

Total volume sits at $1,492, with the full amount recorded in the last 24-hour window. Liquidity stands at $8,130. Both figures confirm this is a thin market. At this volume level, a single mid-size trade can reprice the contract by several percentage points. The 10-point price jump from 0.11 to 0.21 between market open and May 11 is a clean example: a small order flow event moved the entire market. Traders should treat the 21% figure as directionally useful but mechanically fragile.

• 1h change is flat at +0.0%, and 24h change lacks a comparison baseline, meaning the contract has stabilized after the May 11 repricing and is now in a holding pattern ahead of the resolution date.
• The May 11 price jump from 0.11 to 0.21 coincided with the window when five-day forecasts for May 15 first became operationally reliable, suggesting a trader acted on early model guidance pointing toward the mid-50s range.
• Liquidity of $8,130 is thin enough that any updated National Weather Service forecast showing a high-confidence low in the 54-55°F range could trigger another step-change in price before resolution.
• The related markets listed alongside this contract are cryptocurrency price markets with no meteorological correlation. They share a platform but carry no analytical signal for this weather outcome.

Lines Analysis: NYC Temperature on May 15

The data doesn’t care about the politics, and in this case there are no politics at all. What matters is the synoptic setup for the northeastern United States on the evening of May 14 into the morning of May 15. Mid-May in New York sits in a transitional period where the jet stream is retreating northward but has not yet locked into its summer position. A ridge of high pressure over the Mid-Atlantic typically produces clear, calm nights with lows in the low-to-mid 50s, which is exactly the range this bin covers. The 21% probability is consistent with the climatological frequency of landing in any single two-degree band near the climate normal.

The conditions that push probability away from the 54-55°F bin are not extreme. A surface low tracking through the Ohio Valley on May 14 would advect warmer air northward and push NYC’s overnight low above 56°F. Conversely, a cold frontal passage clearing out by late afternoon on May 14 would allow radiative cooling overnight and pull the low into the 50-53°F range. Both scenarios are plausible within normal May variability. The 79% NO probability reflects that wider distribution, not a strong directional forecast for any competing bin.

• National Weather Service New York forecast updates through May 13 will be the primary price mover. Any high-confidence model consensus placing the low in the 54-55°F range should push the YES price toward 30-35%.
• GFS and European model agreement on the overnight low is the single most reliable signal at this lead time. Divergence between the two models will keep uncertainty elevated and the price near current levels.
• A cold frontal passage timing shift of six hours in either direction would reprice multiple bins simultaneously, making the adjacent 52-53°F and 56-57°F bands the most likely beneficiaries if this bin loses ground.
• Thin liquidity of $8,130 means the contract price on May 13 and 14 will reflect individual trader forecasts more than true market consensus. Weight the trend direction, not the absolute price.

The market is pricing uncertainty, not science, and here the uncertainty is almost entirely meteorological. The $1,492 in volume is too thin to treat the 21% as a calibrated probabilistic forecast. What it does reflect accurately is that the 54-55°F bin sits at the center of the climatological distribution for mid-May NYC lows, making it the single most likely individual outcome while still covering only a narrow slice of the full probability space.

LINES VERDICT

Climatologically Centered, Mechanically Uncertain

The 54-55°F bin sits directly at the mid-May climate normal for NYC overnight lows, which is exactly why it drew a 21% probability after the May 11 repricing. The market has identified the right modal bin, but thin liquidity means the price will move sharply the moment credible five-day forecast guidance lands.

What the market says: At 21%, the market places this specific two-degree window as the single most likely individual outcome but still heavily favors every other temperature range combined. With resolution at 2026-05-15 12:00:00 just three days away, the price is entering its most reactive window. Any official forecast update with high confidence on the overnight low will reprice this contract quickly.

Key unknown: The National Weather Service New York Area Forecast Discussion issued on May 13 or 14 is the single data point that will reprice this contract. If NWS forecast guidance places the May 15 low within the 53-56°F range with high confidence, the YES price should climb. A forecast pointing to a frontal passage or warmer advection would shift probability mass to adjacent bins.

Scientific and Climatological Context

New York City’s May 15 climate normal for the daily minimum temperature hovers near 53°F, based on long-term NOAA baseline data for the Central Park observing station. The 54-55°F bin therefore covers the slightly above-normal portion of the expected distribution. Years with a persistent warm ridge over the eastern seaboard in mid-May tend to push the low above 56°F. Years with late-season cold air intrusions produce lows in the upper 40s or low 50s. Neither pattern is dominant enough to systematically bias the market away from the central bin at this resolution. The contract closes at 2026-05-15 12:00:00, meaning the determining low will be the overnight reading from late May 14 into the morning of May 15, the period of minimum temperature for that calendar day. Updated model guidance issued May 13 will be the last major input before the market closes.

Frequently Asked Questions

• What does 21% probability mean for this contract? It means the market assigns roughly a one-in-five chance that NYC’s lowest temperature on May 15 lands specifically between 54°F and 55°F. Across ten possible bins, 21% makes this the single most likely individual outcome.
• What does the NO contract cover? NO pays out if the NYC low on May 15 falls in any other temperature band: anywhere from 41°F or below up to 60°F or higher, across nine separate alternative ranges.
• What data or event moves this price? National Weather Service forecast updates for the New York metro area, specifically the May 13 and May 14 Area Forecast Discussions, will be the primary price driver as resolution approaches.
• When does this market resolve? The contract resolves at 2026-05-15 12:00:00, using official temperature measurement data for New York City on that date.
• Is the volume and liquidity reliable here? No. Total volume is $1,492 and liquidity is $8,130. At this level, a single trade can move the price by several percentage points. The 21% probability is directionally useful but not a calibrated consensus forecast.

This analysis reflects market conditions as of 2026-05-12 06:40:38. Prediction market probabilities are volatile and shift as new data and regulatory decisions emerge, especially as the 2026-05-15 12:00:00 resolution date approaches. Lines.com does not accept bets or provide financial or gambling advice. All market outcomes are uncertain.