Temperature anomalies are calculated using a 5°x5° grid, based on the 1991-2020 mean. Precipitation values use a 2.5°x2.5° grid and anomalies are relative to the 1991-2020 mean. Please note, monthly precipitation data are not available until a few days after temperature data are released.
*Signifies a tie
**Insufficient variability in the data record renders rank insignificant
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