March 2026 was the warmest March on record in the United States.
NOT BSTOTAL BS
HARDLY BS — Verdict: Mostly True
Verified by Lenz ·
The Short Version
NOAA data and multiple independent news sources confirm that March 2026 shattered temperature records, with an anomaly of 9.4°F above the 20th-century average — the largest for any month in over 130 years of records. The record applies specifically to the contiguous United States (Lower 48), which is NOAA's standard framework for national climate reporting. While the claim's phrasing of "the United States" aligns with how this record is conventionally described, it technically omits the distinction that Alaska and Hawaii are not included in the dataset.
Caveats
The 'warmest March on record' designation is based on NOAA's contiguous U.S. (CONUS/Lower 48) dataset, not a measurement encompassing all 50 states including Alaska and Hawaii.
Different temperature datasets (station-based NOAA, satellite, reanalysis) use different baselines and geographic domains, which can affect rankings.
While the U.S. record is robust, satellite data (Dr. Roy Spencer) notes the warmth was geographically concentrated and not reflected across the broader Northern Hemisphere.