Rainfall and Temperature Anomaly Indices for Climate Analysis R package ClimateAnomaly version 1.0.0 Computes rainfall anomaly indices and a standardised temperature anomaly from monthly or annual precipitation and temperature data supplied by the user. The rainfall indices are the Rainfall Anomaly Index (RAI; Van Rooy, 1965), the Modified Rainfall Anomaly Index (MRAI) and the Standardized Rainfall Anomaly Index (SRAI) of Ekpetere (2025) <doi:10.1016/j.jenvman.2025.124160>, the Simplified Standardized Precipitation Index (SSPI) of Raziei (2021) <doi:10.1016/j.jhydrol.2021.126761>, and the Standardized Precipitation Index (SPI; McKee et al., 1993). The temperature anomaly is a z-score computed within each calendar month. All indices are computed group-wise, so the user can stratify by any combination of spatial units (state, district, grid cell) and calendar month, and each value can be classified into a descriptive severity class. Software Depends: R (>= 4.0.0) Imports: stats, e1071 Suggests: knitr, rmarkdown, testthat (>= 3.1.5) Ranjit Kumar Paul <ranjitstat@gmail.com> Comprehensive R Archive Network (CRAN) Md Yeasin [aut], Ranjit Kumar Paul [aut, cre], Pushkar Bora [aut] GPL-3 2026-10-16 application/tgz https://CRAN.R-project.org/package=ClimateAnomaly doi:10.32614/CRAN.package.ClimateAnomaly