PlainClimate

Warming Anomaly Lookup

Enter a U.S. ZIP, county, or city to estimate the 30-year warming anomaly versus the 1901-2000 baseline, plus where that figure falls relative to the national land-temperature mean. Computed from NOAA NCEI nClimDiv divisional anomalies.

This is a quick estimator built from NOAA divisional anomalies — for a station-level result, consult NOAA Climate at a Glance.

How this estimator works

The tool maps a U.S. location to one of 344 NOAA climate divisions, then differences the requested 30/50/120-year mean against the 1901-2000 baseline. The percentile compares that anomaly to the national distribution of divisional anomalies for the same window. NOAA NCEI publishes the underlying nClimDiv dataset and refreshes it monthly.

For research-grade results, request the data directly from NCEI nClimDiv — this estimator is intended for quick orientation, not legal or insurance use. The 1901-2000 reference period is the WMO-recommended baseline used by NOAA, NASA GISTEMP, and the IPCC for anomaly reporting.

Data sources: NOAA NCEI nClimDiv (divisional monthly temperatures, 1895-present), 1901-2000 baseline per WMO. See our methodology for derivation and caveats.