Two of the most closely watched long-range forecasts in American agriculture disagree outright on what fall will bring, and the gap is widest in exactly the regions where harvest-season weather decisions carry the most weight.

The National Weather Service's Climate Prediction Center (CPC) favors above-normal temperatures across most of the contiguous United States for the August-September-October period, including much of the Northeast, Mid-Atlantic and Southeast. The Old Farmer's Almanac, by contrast, calls for widespread cooler-than-average conditions across large stretches of the East Coast and Pacific Coast.

For growers planning harvest windows, drying costs and fall fieldwork, the split matters. A warm, dry autumn in the Northeast would compress drying expenses and open wide harvest windows. A cool, wet one would do the opposite.

Northeast: Opposite Pictures

The disagreement is sharpest here. The Almanac forecasts below-average temperatures alongside above-average precipitation, making the Northeast one of the few parts of the country where it expects rainfall to exceed typical autumn levels.

The CPC points the other way on both variables. NOAA forecasters favor warmer-than-normal temperatures across New England and much of the Northeast through the three-month period, and parts of the region fall within areas where below-normal precipitation is favored.

One outlook suggests frequent rainfall and slower crop drydown. The other points to a warmer season with a greater chance of drier-than-average conditions.

Southeast Splits Again

The Almanac forecasts cool temperatures across the Southeast, with Southern Florida described as "wet" and other Southeast states "dry." The CPC expects average precipitation across the region but favors above-normal temperatures throughout, reflecting a broader national pattern of warmth extending from the Gulf Coast to the Northeast.

Pacific Northwest: The Widest Gap

Washington and Oregon face one of the sharpest forecast contrasts in the country. The Almanac predicts a notably cool and wet season, with parts of the region receiving as much as 3 inches more rainfall than normal during September and temperatures trending cooler than average.

The CPC favors below-normal precipitation across parts of the Northwest and greater odds of above-normal temperatures across much of the West. That federal outlook aligns with other meteorologists' expectations because of the developing El Niño in the Pacific Ocean, which could bring dry, warm weather across the Northwest this fall and winter.

For Pacific Northwest growers, the difference is not academic. An El Niño-driven dry, warm autumn would ease harvest logistics but tighten soil moisture going into winter. The Almanac's wet scenario would raise the opposite set of problems, from field-access delays to disease pressure in late-season crops.

Northern California

The divide extends southward. The Almanac expects the Pacific Coast to run cooler than average overall and anticipates slightly above-average rainfall in Northern California. The CPC places much of California within an area where above-normal temperatures are favored. Precipitation in much of the state carries equal chances either way, though Southern California trends toward above-average.

Why They Differ

The methods explain much of the divergence. The Old Farmer's Almanac bases its long-range forecasts on "three pillars," a spokesperson told Newsweek: solar science, climatology and meteorology. The publication also assesses 30-year statistical averages prepared by governmental meteorological agencies.

The NWS outlooks, which can be issued as far as a year in advance, are probabilistic, a NOAA spokesperson told Newsweek. Neither product forecasts daily weather months out. Both describe the most likely temperature and precipitation patterns averaged across a season.

That distinction matters for farm planning. A probabilistic CPC outlook tilted by El Niño signals carries physical ocean-atmosphere backing; the Almanac's solar-cycle methodology sits outside mainstream seasonal prediction. Growers weighing harvest timing, hay cutting windows or fall fertilizer applications in the Northeast, Southeast and Pacific Northwest should treat the CPC tilt as the baseline and watch monthly CPC updates, which carry higher skill as the season approaches.

Only time will reveal which outlook lands closest to reality. Farmers in the contested regions should watch the CPC's next monthly update and El Niño monitoring from NOAA as the sharper short-term signal heading into harvest.