Climate and Weather · Kalshi ·July 16, 2026 ·Edited by Samuel Jo

New York City tracks July rainfall against one-inch threshold

Central Park's official rain gauge is being watched this month for a simple threshold: whether total July 2026 precipitation exceeds one inch. The question resolves on July 31, and with roughly two weeks remaining, New York has already seen active summer weather, including a mid-July storm that brought heavy winds and torrential rain to the city's suburbs, as The New York Times reported on July 5. Traders put the probability of surpassing one inch at 99%, a level consistent with the city's typical summer rainfall pattern. The market has held roughly steady over the period it has been tracked.

Background

Central Park is the National Weather Service's official measurement site for New York City precipitation, and its readings are the standard reference for weather records going back to the 19th century. July is historically one of New York's wetter months, with normal rainfall well above the one-inch mark. The one-inch threshold this market resolves on is a low bar relative to typical July totals, which average closer to four and a half inches. A single moderate thunderstorm can produce an inch of rain in hours. The gauge has been the city's benchmark since 1869, making it one of the longest continuous climate records in the United States.

The precedent

• Central Park has maintained continuous daily precipitation records since 1869, one of the longest-running climate datasets in the United States.
• New York City's normal July precipitation at Central Park averages approximately 4.6 inches, well above the one-inch threshold.
• July is historically one of the wettest months in New York City, driven by humid air masses and frequent thunderstorm activity.

Context compiled by Crowdtells from the public record — verify before relying on it.

What to watch

The resolution date is July 31, 2026, when Central Park's official monthly total will be finalized. Any additional thunderstorms or frontal passages over the remaining two weeks of the month could push the accumulation past the one-inch mark if it has not already been cleared. The National Weather Service publishes daily precipitation readings from the Central Park station.

AI-written briefing grounded in 1 source and the live market, edited by Samuel Jo. Odds are crowd probabilities, not advice — how this works.