Winter forecast controversy. Can you trust an almanac?
Long-running weather almanacs blend sunspot theory and traditional folklore to forecast seasons, but scientists question their reliability as long-range predictors. The Old Farmer’s Almanac and Farmers’ Almanac tout about 80% accuracy, while researchers note that modern models and El Niño signals offer more credible short- to medium-range forecasts. The publications emphasize broad, dramatic language that appeals to the public, even as forecasters acknowledge inherent limits and secrecy surrounding their methods. With the Farmers’ Almanac winding down after 2026, the debate about why people trust almanacs persists, even as climate science advances. Momentum remains uncertain as the public weighs historical storytelling against rigorous probabilistic forecasting.
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Old Farmer’s Almanac and Farmers’ Almanac claim long-range forecasts based on century-old formulas incorporating sunspots, solar activity, tides, planetary positions, and more, while offering limited transparency about their exact methods.
Experts like J. Marshall Shepherd argue that scientific forecasts—driven by advanced computer models and observational systems—have improved significantly for short-term and seasonal outlooks, reducing reliance on almanac-style predictions.
Meteorologists caution that the claimed 80% accuracy is often an overstatement; testing against regional outcomes shows mixed results and underscores the difficulty of predicting temperatures and precipitation far in advance.
Statistical breakdowns cited by almanac editors reveal region-by-region accuracy for recent winters (e.g., 83.3% temperature and 94.4% precipitation in 2025–26 for certain regions), but critics say such metrics can be misleading without proper context.
Commentators note that almanacs excel at storytelling and cultural resonance, which helps sustain public interest even when their scientific value is debated, and moon phase or tide data in almanacs remains more consistently reliable.
The two major almanacs—distinguished by centuries of publication history—are portrayed as complementary guides for safety and planning, though their long-range climate forecasts are not considered definitive by the scientific community.
As the Farmers’ Almanac prepares to conclude its 2026 edition, researchers emphasize transparency and integration with published climate science, while acknowledging that long-range forecasts will continue to face skepticism from the meteorological community.