San Francisco Fed Finds El Nino Could Raise 2027 Prices

A powerful El Niño weather episode could create an additional one-percentage-point increase in U.S. consumer prices during 2027 under conditions modeled by San Francisco Federal Reserve researchers. The November 2 analysis identifies potential pressure on food and services prices, even as historical patterns suggest some employment benefits. The researchers stress that the inflation result is a risk scenario, not a firm forecast of what American households will pay next year.

The study combines historical economic information with meteorological records to estimate how unusually warm Pacific Ocean conditions have affected U.S. prices and employment since the 1950s. El Niño begins as Pacific trade winds weaken, moving warm water and shifting weather patterns around the world. In the United States, the resulting changes can influence rainfall, temperatures, agriculture, energy demand and business activity.

The researchers estimate that the current episode may have temporarily raised the personal consumption expenditures price index, a broad measure of consumer prices tracked by the Federal Reserve by about 0.3 percentage point between April and July 2026. They expect that initial effect to fade by the end of the year, based on historical relationships. The larger potential impact comes during 2027 rather than immediately.

The 2027 estimate depends on the next weather pattern

The study finds a possible net price-level increase of one percentage point over 2027 if the current strong El Niño is followed by La Niña. That second phase involves strengthened trade winds and a different circulation pattern. If La Niña does not emerge, the researchers’ model does not expect a further net price effect in 2027. The model itself is not intended to forecast whether La Niña will occur.

The one-point estimate concerns the overall level of prices compared with what they might otherwise have been, not a permanent additional one-point rise in the annual inflation rate. It also does not imply that each grocery item, utility bill or insurance premium would increase by the same amount.

The historical data suggest price effects are concentrated in core services and food. The study also discusses temporary impacts on energy and other categories. Weather can affect planting, harvesting, transportation, construction and heating demand through distinct channels, so the national result combines forces that vary by region and season.

There may be an employment benefit, too

The analysis finds that employment has tended to rise in the year after an El Niño episode, even when the inflation outcome depends on subsequent weather. Warmer conditions in some northern areas can support certain types of work and reduce weather-related interruptions. The study does not project a specific number of new jobs for 2027.

The authors highlight substantial uncertainty: their historical sample contains only 22 El Niño events, including four considered very strong, and the current event could be outside the range of past observations. They also note that global supply chains and today’s economic environment differ from earlier decades. Their conclusion is a meaningful potential risk to prices next year, alongside a possible employment lift, rather than an inevitable new inflation spike.

References: The Impact of El Niño on the U.S. Economy | El Nino poses meaningful risk of higher inflation in 2027, SF Fed paper says