Summer driving season historically pushes U.S. gas prices to their annual peak. As millions of Americans plan road trips between Memorial Day and Labor Day, demand for gasoline surges — and refineries switch to costlier summer-blend formulations that reduce smog-forming emissions in hot weather.
The Summer Blend Premium
Refineries begin transitioning to summer-grade gasoline in March, with the switchover mandated by June 1. Summer blends use lower-volatility butane additives that cost approximately $0.10-0.15 more per gallon to produce. This cost is passed directly to consumers, contributing to the typical spring price increase.
2026 Outlook
Analysts project U.S. average regular gasoline prices could reach $3.50-3.80 per gallon by June 2026, depending on crude oil trajectory, refinery utilization, and geopolitical developments. California could see prices above $5.25 during peak season, while Gulf Coast states may stay below $3.20.