This is a market on whether the average global land and ocean surface temperature for August 2021 will be the highest August temperature since global records began in 1880.
The resolution source for this market will be the Global Climate Report for August 2021, published by NOAA's National Centers for Environmental Information (https://www.ncdc.noaa.gov/sotc/global/2021). 

This market will resolve to “Yes” if, for the month of August 2021 averaged as a whole, global land and ocean surface temperature anomaly, as measured by U.S. National Oceanic and Atmospheric Administration, will be greater than 0.98°C (1.76°F) above the 20th century average of 15.6°C (60.1°F), and “No” otherwise. Past data for the month of August can be found here https://www.ncdc.noaa.gov/cag/global/time-series/globe/land_ocean/1/8/1880-2021. This market will resolve when data is first available for the month of August 2021. In the event of an ambiguity in terms of the market outcome, the market will be resolved in good faith at the sole discretion of the Markets Integrity Committee (MIC).

Will August 2021 average global temperature be the highest August temperature on record?

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