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Python Climate Indices

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Climate indices for everyone

Code developed by NIDIS for calculating various climate indices, which provide a geographical and temporal picture of the severity of precipitation and temperature anomalies.


  • Standardized Precipitation Index (SPI)
  • Standardised Precipitation-Evapotranspiration Index (SPEI)
  • Potential EvapoTranspiration (PET)
  • Percentage of Normal Precipitation (PNP)
  • Palmer Drought Severity Index (PDSI)
  • Self-calibrated Palmer Drought Severity Index (scPDSI)
  • Palmer Hydrologic Drought Index (PHDI)
  • Palmer Z-Index (Z-Index)
  • Palmer Modified Drought Index (PMDI)