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the claim
Meteorology defines normal climate periods using standardized 30-year averages.
the verdict
SUPPORTED
the evidence backs this
refutedsupported
the weight of evidence
4 sources for · 0 against

Meteorology standardly defines and evaluates climate normals using 30-year averages, as supported by multiple climate studies and datasets.

Evidence for · 4
A global climate model ensemble for downscaled monthly climate normals over North America
2022 · cited by 131
The study mentions the widespread use of 30-year normals in climate change impact analyses and model projections.
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The analysis

The retrieved papers consistently reference and use 30-year periods as the standard baseline for climatological normals across various regional and global studies, supporting the claim without any conflicting evidence.

More for · 3
Projecting “Normals” in a Nonstationary Climate
2013 · cited by 24
The paper discusses averages of 30 years as established formulations used for estimating climate normals.
Southeastern Brazil inland tropicalization: Köppen system applied for detecting climate change throughout 100 years of meteorological observed data.
2022 · cited by 5
The historical analysis explicitly utilizes 30-year climatological normal periods (e.g., 1917–1946) to evaluate temperature changes.
A high-resolution database of historical and future climate for Africa developed with deep neural networks.
2025 · cited by 1
The research database incorporates standard 30-year normal climate data spanning the historical record.
The paper trail · every fact has a biography
first checked05 Aug 2026
judged → SUPPORTED · 8805 Aug 2026
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