Mt. Washington July Wind Speed: Will It Hit 85 mph?

Mt. Washington sits at the convergence of three major storm tracks in New Hampshire’s White Mountains. The summit holds the record for the highest directly measured surface wind speed ever recorded on Earth: 231 mph in April 1934. July is the quietest month on the mountain, yet the market is pricing a 67.5% chance that peak winds will crack 85 mph before July 31. That’s a meaningful threshold for a summer month, and the market has been climbing toward it steadily.

The question here is whether the highest single wind gust recorded at Mt. Washington Observatory during July 2026 reaches or exceeds 85 mph. The YES price sits at 0.68, the NO price at 0.33, with the market closing at the end of July 31. Total volume stands at $14,022, which is thin enough that a single data point, one big gust or one calm week, could reprice this contract sharply.

How the Mt. Washington Wind Speed Contract Works

Mt. Washington Observatory operates the summit weather station continuously and publishes real-time and archived wind data. Resolution depends on whether any single wind gust at the summit reaches or exceeds 85 mph during July 2026. The alternative outcomes (90, 95, 100, 105, 110, 115 mph) represent separate contracts trading at lower probabilities.

• YES (≥85 mph): Priced at 0.68, implying a 67.5% probability that at least one gust hits this threshold before July 31.
• NO (below 85 mph): Priced at 0.33, implying a 32.5% chance the month closes without a qualifying gust.

For NO to pay out, Mt. Washington Observatory must record no gust at or above 85 mph across the entire month. July winds on the summit average around 25 to 35 mph, with gusts well below the winter peaks. Sustained high-wind events in July typically require a strong, well-positioned extratropical cyclone or a vigorous cold front crossing the region. If July 2026 stays dominated by the Bermuda High and dry summer ridging, NO becomes much more plausible.

Momentum and Market Signals

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The combined momentum signal is modestly bullish. The 1-hour change is flat at 0.0%, the 24-hour change is up 0.5%, and the trend score sits at 9.03 out of 10. That trend score is the headline here. It reflects a market that has been moving in one direction with consistency, not just noise. The sharp June 26 jump, which pushed prices up more than a third in a single day, suggests traders responded to a weather event or forecast model run showing elevated wind potential for the opening stretch of July.

Total volume of $14,022 is modest. The 24-hour volume of $970 and liquidity of $4,862 confirm this is a thin market. A single large bet or a dramatic summit observation can move prices fast. Treat the 67.5% probability as a directional signal, not a precise calibration.

• The trend score of 9.03 indicates strong directional conviction over recent sessions, connected to the late-June price surge.
• The 24-hour price change of +0.5% adds to a pattern of slow, steady YES accumulation after the June 29 pullback.
• Liquidity at $4,862 is thin. New weather data or a strong forecast model run could gap prices in either direction.
• The June 26 surge of +35.5% and the June 29 correction of -13.5% show this market reacts sharply to near-term forecast changes.
• Open interest sits at zero, meaning all current exposure is in live positions rather than settled contracts.

Lines Analysis: What the Summit Data Says

Mt. Washington Observatory records winds above 85 mph in July roughly once every few years, not every year. The historical climatology tilts toward NO in any given July, but the market is pricing YES as the more likely outcome. Here’s what the measurements are telling us: the late-June price action suggests at least one forecast model showed a strong synoptic system approaching the summit in early July, and traders bought that signal hard.

The path for NO runs through a quiet, high-pressure-dominated July. If the Bermuda High parks over the eastern seaboard and blocks storm tracks from New England, the summit could spend the entire month below threshold. Mt. Washington Observatory will publish daily extremes in real time. Any multi-day stretch without a qualifying gust narrows the remaining window and should push NO prices higher.

• Mt. Washington Observatory real-time data: any gust above 85 mph resolves YES immediately and collapses NO to near zero.
• National Weather Service forecast discussions for northern New England: watch for extratropical cyclone tracks passing north of 42 degrees latitude within 200 miles of the summit.
• GFS and Euro model runs: a strong 500 mb trough diving into New England with an associated tight surface pressure gradient is the primary YES catalyst.
• Bermuda High persistence: a stable, dominant high through mid-July is the primary NO catalyst and should be watched on weekly model runs.
• Mt. Washington Observatory monthly climate summaries: historical July wind maxima provide the base rate context for this threshold.

The data doesn’t care about the politics, and here there are no politics. This is pure meteorology. Total volume of $14,022 is thin, the trend score is high, and the market is telling you it expects a windy July. The question is whether the synoptic setup that drove late-June buying materializes into an actual 85 mph observation before July 31.

LEAN YES, THIN MARKET

The trend score and late-June buying suggest traders saw a real meteorological catalyst. But thin liquidity means this price can reverse fast if the summit stays calm through mid-July.

What the market says: At 67.5%, the market assigns a clear majority probability to at least one gust reaching 85 mph this month. With three weeks of July remaining and thin liquidity, a single calm stretch or a single big gust will move this price significantly before the July 31 close.

Key unknown: The next major synoptic weather system targeting northern New England is the single most important variable. A strong extratropical low tracking through the region would be the primary catalyst for a YES resolution and a sharp price jump.