What is a Climate Anomaly and Why Does it Matter?
A climate anomaly measures the departure of observed temperature or precipitation from a 30-year baseline normal. Climatologists track anomalies to identify trends and assess drought or heatwave severity.
This tool benchmarks local conditions against long-term US climatological normals. A positive anomaly indicates warmer-than-average conditions, while a negative anomaly signifies cooler weather.
Temperature anomaly thresholds: Within ±3.5°F (±2°C) is near normal; departures greater than +3.5°F are above normal, and below −3.5°F are below normal.
Tracking climate deviations helps homeowners, agricultural producers, and energy utilities anticipate seasonal heating and cooling burdens.