Do they agree?
Three separate answers.
Almost identical.
NASA, NOAA, and Berkeley Earth each measure Earth's temperature their own way, from their own data. In a typical year their answers differ by about 0.04°C — a gap far too small to feel, and over 25× smaller than the warming all three report. This page measures that gap exactly.
Typical gap
between the highest and lowest answer — in half of the 145 years all three measured, the gap is even smaller
Worst disagreement
the largest gap ever, in 1884
Three teams that don't share methods or station lists land on almost the same number, year after year. If the record were wrong, they'd have to all be wrong in the same way — that agreement is the evidence.
Agreement in 2000
gap: 0.050°CWhy do they differ at all?
Each team makes its own judgment calls: how to estimate the poles, which ocean records to trust, how to fill gaps where stations are sparse . Different choices produce slightly different answers — typically about 0.04°C apart, smaller than any home thermometer can even display. Each dataset's page has the full method story.
Compare two years
Difference and warmth ranks use NOAAGlobalTemp v6 (the longest record). 1936: rank #108 · 2016: rank #4.
Warmest 10 on record · NASA GISTEMP v4
All 10 fall between 2015 and 2025.