Preliminary ERA5 data from the Copernicus Climate Change Service shows global surface air temperatures on March 1-3, 2026, ranking outside the top three all-time daily records, supporting the market's 98.3% implied probability for "4th or lower." This positioning stems from lingering La Niña conditions—confirmed by NOAA through early 2026—which suppressed anomalies below the peaks of the 2023-2024 El Niño period, when July days exceeded 17°C absolute temperatures. January and February 2026 ranked only fifth-warmest on record, with March's overall anomaly near +0.4°C above the 1991-2020 baseline per JRA-55 reanalysis, starting notably cool. A realistic challenge would require substantial upward revision in final ERA5 data, unlikely given reanalysis stability, ahead of the official March bulletin.
Experimental AI-generated summary referencing Polymarket data · Updated2026 March 1st, 2nd, 3rd hottest on record?
2026 March 1st, 2nd, 3rd hottest on record?
4th or lower 98.3%
1st hottest <1%
3rd hottest <1%
2nd hottest <1%
$276,630 Vol.
$276,630 Vol.
1st hottest
<1%
2nd hottest
<1%
3rd hottest
<1%
4th or lower
98%
4th or lower 98.3%
1st hottest <1%
3rd hottest <1%
2nd hottest <1%
$276,630 Vol.
$276,630 Vol.
1st hottest
<1%
2nd hottest
<1%
3rd hottest
<1%
4th or lower
98%
Note: If March 2026 is tied for first, second, or third hottest with another year, it will qualify for the bracket it ties with.
The primary resolution source for this market will be the figures found in the table titled "GLOBAL Land-Ocean Temperature Index in 0.01 degrees Celsius" under the column "Mar" (https://data.giss.nasa.gov/gistemp/tabledata_v4/GLB.Ts+dSST.txt). If NASA's "Global Temperature Index" is rendered permanently unavailable, other information from NASA may be used.
If no information for March 2026 is provided by NASA by April 30, 2026, 11:59 PM ET, a consensus of credible sources will be used to resolve this market.
Market Opened: Feb 26, 2026, 5:45 PM ET
Resolver
0x69c47De9D...Note: If March 2026 is tied for first, second, or third hottest with another year, it will qualify for the bracket it ties with.
The primary resolution source for this market will be the figures found in the table titled "GLOBAL Land-Ocean Temperature Index in 0.01 degrees Celsius" under the column "Mar" (https://data.giss.nasa.gov/gistemp/tabledata_v4/GLB.Ts+dSST.txt). If NASA's "Global Temperature Index" is rendered permanently unavailable, other information from NASA may be used.
If no information for March 2026 is provided by NASA by April 30, 2026, 11:59 PM ET, a consensus of credible sources will be used to resolve this market.
Resolver
0x69c47De9D...Preliminary ERA5 data from the Copernicus Climate Change Service shows global surface air temperatures on March 1-3, 2026, ranking outside the top three all-time daily records, supporting the market's 98.3% implied probability for "4th or lower." This positioning stems from lingering La Niña conditions—confirmed by NOAA through early 2026—which suppressed anomalies below the peaks of the 2023-2024 El Niño period, when July days exceeded 17°C absolute temperatures. January and February 2026 ranked only fifth-warmest on record, with March's overall anomaly near +0.4°C above the 1991-2020 baseline per JRA-55 reanalysis, starting notably cool. A realistic challenge would require substantial upward revision in final ERA5 data, unlikely given reanalysis stability, ahead of the official March bulletin.
Experimental AI-generated summary referencing Polymarket data · Updated

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