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Climate and Weather OPEN

Highest temperature in Boston on Apr 21, 2026?

📊 $0 traded 🏦 Source: Kalshi
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All Outcomes (6)
Outcome Probability Yes Bid Yes Ask 24h Change Volume
47° or below 0%
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48° to 49° 0%
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50° to 51° 0%
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52° to 53° 0%
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54° to 55° 0%
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56° or above 0%
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About This Market

This market tracks the official daily high temperature recorded in Boston on April 21, 2026. These data points are essential for understanding regional spring climate variability and urban heat trends.

April in Boston is a transitional month characterized by significant temperature volatility due to the interaction between cold maritime air from the Atlantic and warming inland continental air masses. Historical meteorological data for late April shows a wide range of outcomes, with daily highs typically falling within a mid-to-high spring range, though extreme deviations can occur depending on atmospheric blocking patterns.

Market prices reflect the collective anticipation of how the specific weather conditions on this date will align with historical averages and long-range seasonal forecasts.

Key Factors

Frequently Asked Questions

Which meteorological station determines the official high temperature for this event?

The official reading is typically derived from the National Weather Service data recorded at Boston Logan International Airport.

How does spring transition weather impact the temperature volatility on April 21st?

Because Boston sits on the coast, the temperature is highly sensitive to wind direction; 'sea breezes' can significantly lower daytime highs compared to inland locations.

Are there specific climate phenomena like El Niño or La Niña that influence this date?

Large-scale climate oscillations can shift global weather patterns, but their specific impact on a single day's temperature in New England is nuanced and subject to localized weather variability.

What happens if there is an extreme weather event on this date?

The market resolves based on the official temperature recorded, regardless of whether the weather conditions are considered typical or extreme for late April.

Why is the highest temperature measured instead of the average?

Daily high temperatures are a standardized metric used by meteorologists to track heat accumulation and seasonal progression, making them a clear and verifiable benchmark for forecasting.

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