HC4 monthly
HC5 monthly
HC4 annual mean
HC5 annual mean
HC5 − HC4
Polynomial fit
degree
1
2
3
Rolling avg
window
10y
HadCRUT4 ends
2021-12
HadCRUT5 ends
2026-02
Rolling window:
10 years
Use checkboxes above to toggle series. Both datasets use the 1961–1990 baseline.