London May 2 Low Temp: Will It Hit Eleven Degrees?

London weather markets live and die on single-degree margins. This contract asks one sharp question: will the lowest temperature recorded in London on May 2, 2026 land exactly at 11°C? Traders currently put that probability at 34 percent, a number that surged 11.5 percent in the last 24 hours. That shift is not noise. It reflects fresh ensemble forecast data pushing the overnight low toward the low-to-mid teens range, with the 11°C outcome sitting at the center of a tightly clustered distribution.

The resolution window closes at 2026-05-02 12:00:00, leaving less than 30 hours for the forecast picture to sharpen or collapse. Total market volume sits at $2,509, with $1,477 of that trading in the last 24 hours. That is a thin market. One confident trader moving a few hundred dollars can reprice this contract meaningfully before the thermometer settles.

How the Eleven-Degree Contract Works

This market resolves YES if the official lowest temperature recorded in London on May 2, 2026 is exactly 11°C. Any other reading, whether 10°C, 12°C, or anything else on the listed outcome ladder, resolves this contract NO. The resolution source is Polymarket’s market resolution process, which draws on official meteorological observation data for London.

• YES (11°C lowest temperature): Priced at 0.34, implying a 34% probability.
• NO (any other temperature): Priced at 0.66, implying a 66% probability.

The NO outcome wins whenever the overnight low falls to 10°C or below, or rises to 12°C or above. London’s May 2 overnight lows have historically clustered between 8°C and 13°C, which means the distribution is genuinely spread across multiple outcome buckets. The 11°C contract competes directly with 10°C and 12°C markets, both of which carry meaningful implied probability. A shift in forecast ensemble models toward a colder or warmer overnight trough pulls capital away from 11°C and into neighboring contracts almost instantly.

Momentum and Market Signals

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The momentum composite, combining a flat one-hour reading, an 11.5 percent 24-hour gain, and a trend score of 52.53, points to a contract gaining ground but not yet running. The 24-hour surge aligns with updated medium-range forecasts for London showing a mild anticyclonic pattern on the night of May 1 into May 2. That setup favors overnight lows in the 10°C to 12°C range, which concentrates probability near the 11°C outcome without locking it in.

Total liquidity stands at $4,554 against $2,509 in volume. This is a low-liquidity market. Price movements here do not require institutional conviction. A single $200 bet can shift the probability display by several percentage points. Traders watching this contract should treat price swings as directional signals, not settled consensus.

• 1h change is flat at +0.0%: The contract is consolidating after yesterday’s 24-hour surge, suggesting the most recent forecast runs have not changed the picture materially.
• 24h change of +11.5%: This is the dominant signal, tied to forecast data pushing overnight lows toward the 11-to-12°C band.
• Trend score of 52.53: Neutral-to-slightly-bullish territory. The contract is not in freefall, but it is not accelerating either.
• $4,554 in liquidity: Thin. New forecast data or a model divergence in the next 12 hours can move this price sharply.
• Trader sentiment sits at 34% YES and 66% NO: The majority of capital is positioned against the 11°C outcome, consistent with the spread of probability across multiple temperature buckets.

Lines Analysis: London’s Overnight Margin

The case for 11°C landing as the overnight low rests on current ensemble model agreement. European Centre for Medium-Range Weather Forecasts and UK Met Office short-range guidance both show London’s overnight low on May 2 sitting in a narrow band. When the models cluster this tightly, the center of the distribution, often around 11°C in a mild spring anticyclone, captures a disproportionate share of probability mass. That is what drove the 24-hour price gain.

The spread toward neighboring outcomes is what keeps the NO side at 66 percent. Forecast uncertainty at the 24-to-36-hour range is real. A slight shift in a frontal boundary moving through the English Channel could push the overnight low to 9°C or 10°C. A stronger onshore flow from the southwest could hold the minimum at 12°C or 13°C. Neither scenario is far-fetched for early May in London. The 11°C contract is the mode of the distribution, but it is not a runaway favorite precisely because the distribution is wide.

• UK Met Office 36-hour forecast for London: directional indicator for overnight low positioning, resolve by midnight May 1.
• European Centre ensemble spread for May 2: if the model spread narrows below two degrees Celsius, expect the 11°C contract to gain further ground.
• Surface pressure analysis over the British Isles: anticyclonic conditions favor radiative cooling and a well-defined overnight minimum.
• Any frontal system entering from the Atlantic: would widen the temperature distribution and reduce 11°C probability.
• Observed temperature at London weather stations after 22:00 BST on May 1: early readings will anchor expectations for the overnight minimum.

Against $2,509 in total volume, the 34 percent price for 11°C reflects the market treating this as a single outcome in a ten-outcome field. That framing is correct. The data favors the 11°C outcome over any individual competitor, but the aggregate NO position, covering nine other possible readings, holds more capital for good reason. The next forecast model run, likely available within six hours of this writing, is the single most important input before resolution.

LINES VERDICT

NARROW FAVORITE IN A WIDE FIELD

The 11°C outcome holds the highest single-bucket probability in this market, but a ten-outcome temperature ladder means NO dominates by structure, not by conviction. The data and the models favor this range, and the 24-hour price move confirms it.

What the market says: A 34% implied probability means traders see 11°C as the most likely single outcome, but give it less than one-in-three odds of landing exactly there. In a low-liquidity market resolving at 2026-05-02 12:00:00, the next forecast model update could move this price by five to ten percentage points before trading closes.

Key unknown: The final UK Met Office and European Centre short-range forecast runs for London on the night of May 1 into May 2 are the decisive inputs. Any model shift in the overnight low by one degree in either direction reprices this contract and its nearest competitors immediately.

Scientific Context: Early May Temperature Patterns in London

London’s climatological overnight minimum for early May sits between 8°C and 11°C, based on decades of Met Office station records. The 11°C threshold sits at the warm edge of the historical normal range for this date. Spring 2026 has tracked slightly above the long-term mean across the United Kingdom, consistent with a broader European pattern of warmer-than-average spring conditions documented by the Copernicus Climate Change Service. A warmer baseline raises the probability of overnight lows settling at 11°C or 12°C rather than 9°C or 10°C. That is precisely the zone where this contract operates. Before 2026-05-02 12:00:00, any updated seasonal anomaly data from the Met Office or Copernicus would reinforce the upper end of the likely minimum range and could push 11°C and 12°C contracts closer to parity.

Frequently Asked Questions

• What does 34% probability mean here? The market implies a roughly one-in-three chance the London overnight minimum on May 2 lands exactly at 11°C. Prediction market probabilities shift as new forecast data arrives before the 2026-05-02 12:00:00 resolution deadline.
• How does the NO contract pay out? The NO position wins if the official London lowest temperature on May 2 is anything other than 11°C. Nine alternative outcomes, from 5°C or below to 15°C or higher, all resolve this contract in favor of NO.
• What single event would move this price most? An updated short-range forecast from the UK Met Office or European Centre showing the overnight low shifting by one degree would immediately reprice the 11°C contract and its neighboring outcomes.
• When does this market resolve? Resolution is set for 2026-05-02 12:00:00. Official meteorological data for the overnight minimum must be available by that deadline for the contract to settle.
• Is the volume reliable for price discovery? Total volume of $2,509 and liquidity of $4,554 are thin by prediction market standards. Price here can move sharply on small trades, so treat probability displays as directional signals rather than high-confidence consensus readings.

This analysis reflects market conditions as of 2026-05-01 06:15:19. Prediction market probabilities are volatile and shift as new data and regulatory decisions emerge, especially as the 2026-05-02 12:00:00 resolution date approaches. Lines.com does not accept bets or provide financial or gambling advice. All market outcomes are uncertain.