U.S. gas prices in May 2026 are running 43.6% higher than a year ago, averaging between $4.42 and $4.56 per gallon depending on the week, with forecasts for the full year varying wildly from under $3 per gallon to above $6 per gallon. The spike stems directly from two sources: a February 2026 military incident that effectively closed the Strait of Hormuz, a critical chokepoint for global crude oil supplies, and sustained international demand for U.S. petroleum exports that reached record levels of 5.8 million barrels per day.
These forces pushed crude oil prices from $71 per barrel in February to $107 per barrel by May, driving retail prices at the pump substantially higher. The May 2026 surge is not evenly distributed across the country. California drivers were paying over $6 per gallon at the peak, while 12 states experienced increases exceeding 50% compared to May 2025. The U.S. Energy Information Administration (EIA) projects that average gasoline prices for the full year 2026 will settle around $3.70 per gallon, a significant upward revision from their March forecast of $3.34 per gallon—a shift that reflects how crude oil disruptions feed directly into consumer pump prices within weeks.
Table of Contents
- What Were Gas Prices in May 2026?
- Why Did Crude Oil Prices Spike and Drive Pump Prices Higher?
- How Did Regional Gas Prices Differ in May 2026?
- What Do Energy Forecasters Project for 2026 Gas Prices?
- What Assumptions Underlie These Forecasts and How Might They Fail?
- How Do May 2026 Prices Compare to Recent History?
- What Does This Mean for Drivers’ Budgets and Behavior?
- Frequently Asked Questions
What Were Gas Prices in May 2026?
gas prices climbed steadily through May 2026, with the national average for regular unleaded gasoline hitting $4.55 per gallon on May 7, rising another cent by May 12 to $4.50, and reaching $4.56 by Memorial Day on May 21 before easing to $4.42 by May 28. The May 21 peak price represented a difference of $1.38 per gallon compared to Memorial Day 2025, meaning a driver filling a 15-gallon tank paid $20.70 more than they would have paid one year earlier.
This price movement tracks closely with crude oil markets, which spiked on geopolitical tension and only began moderating in the final week of May. The weekly fluctuations reflect real market dynamics: the 25-cent jump from May 2 to May 7 occurred as refinery utilization increased during the spring transition to summer fuel blends, while the 12-cent decline by May 28 signaled early signs that crude prices might be stabilizing. For consumers, this meant gas prices were not fixed targets but moving targets—a driver who filled up on May 7 paid substantially more per gallon than a driver who waited until May 28, though still significantly more than May 2025 levels.
Why Did Crude Oil Prices Spike and Drive Pump Prices Higher?
On February 28, 2026, military action in the Middle East led to the de facto closure of the Strait of Hormuz, a waterway through which roughly 20% of the world’s seaborne crude oil normally flows. The EIA documented this disruption as a direct cause of crude oil price increases, with Brent crude (the international benchmark) climbing from $71 per barrel in February to $107 per barrel in May. This $36-per-barrel increase directly translates to higher costs at U.S. refineries, which pass those costs forward to consumers at the pump within 1-2 weeks. The problem is not theoretical supply loss but realistic supply uncertainty.
Even if no crude oil physically stopped flowing, the closure of a critical chokepoint raises geopolitical risk premiums that trading firms price into contracts immediately. The EIA has cautioned that its price forecasts depend on the Strait remaining accessible—a significant caveat that acknowledges the fragility of current assumptions. If the strait remains closed beyond current projections, prices could climb substantially higher than forecasted. Simultaneously, U.S. refineries maintained near-record petroleum export levels of 5.8 million barrels per day in April and May, fueled by strong international demand following the supply disruption. This means refineries were actively competing with global buyers for available crude, which typically drives domestic prices upward in situations of supply tightness.
How Did Regional Gas Prices Differ in May 2026?
California’s refinery capacity bottleneck made it especially vulnerable to crude price spikes, with pump prices exceeding $6 per gallon during the May peak. California refineries have limited excess capacity and cannot easily substitute crude from other sources, meaning they absorb crude price increases with minimal opportunity to shop for cheaper supplies. A driver in Los Angeles filling a 15-gallon tank at $6 per gallon was spending $90 versus $55 in comparable pump prices in states like Texas or Oklahoma, where refinery competition and pipeline access kept prices closer to the national average.
Beyond California, the LendingTree study identified 12 states that experienced year-over-year price increases exceeding 50%, including states with seasonal fuel blends or limited refinery access. This geographic unevenness creates distinct consumer impact: a new York commuter saw prices climb by well over a dollar per gallon compared to May 2025, while a consumer in a state with ample refining capacity might have seen a 35-40% increase instead. These regional differences matter for household budgets—a family that drives 15,000 miles per year at 25 miles per gallon consumes 600 gallons annually, meaning a 50% price increase represents roughly $900 in additional annual fuel costs versus a 35% increase in another state.
What Do Energy Forecasters Project for 2026 Gas Prices?
The EIA’s April 2026 forecast projects an average of $3.70 per gallon for regular gasoline across the full year 2026, a substantial revision upward from their March forecast of $3.34 per gallon. This revision happened because crude oil prices moved higher than the March forecast anticipated, and the April forecast incorporated the reality that crude prices would not immediately collapse. The EIA’s model assumes crude oil prices will decline from the May highs toward lower levels, reducing pump prices in the second half of the year.
GasBuddy, which operates a crowdsourced network of gas price reporters, has made a bolder prediction that average gas prices for the full year 2026 will eventually drop below $3 per gallon. This longer-term forecast assumes that crude supplies eventually normalize, possibly through alternative supply routes, and that global demand moderates. However, Trading Economics’ forecast ranges from a low of $3.75 per gallon to a high of $6.35 per gallon by year-end, reflecting the significant uncertainty embedded in geopolitical outcomes—a range so wide that it illustrates how much current prices depend on factors outside normal market analysis.
What Assumptions Underlie These Forecasts and How Might They Fail?
The EIA’s forecast carries an explicit caveat: lower prices in 2026-2027 assume the Strait of Hormuz remains accessible and that crude oil supplies normalize. If the strait remains closed, or if new geopolitical disruptions occur elsewhere, crude prices could remain elevated and pump prices would follow. Additionally, the forecasts assume U.S. refinery utilization will continue at normal levels; any refinery outages (whether for maintenance, accident, or environmental shutdown) would reduce supply and push prices higher.
Similarly, if global demand for crude oil remains stronger than forecasted—particularly if recovering economies require more energy—price declines may not materialize. Another limitation: the EIA’s forecast for on-highway diesel at $4.80 per gallon for 2026 adds complexity for consumers, because diesel prices don’t always track gasoline prices in the same way. Diesel powers most heavy trucks and many commercial vehicles, so if diesel remains elevated while gasoline prices fall, transportation and logistics costs remain high, indirectly affecting consumer prices for delivered goods. Finally, seasonal factors matter: summer driving season (May through August) typically correlates with higher prices, and winter demand is lower, so year-to-date averages can mask quarter-by-quarter volatility.
How Do May 2026 Prices Compare to Recent History?
At $4.50-$4.56 per gallon in May 2026, prices are comparable to June 2022 levels when drivers faced a similar geopolitically-driven crude spike following Russia’s invasion of Ukraine. The June 2022 national average peaked around $5.00 per gallon, making May 2026 slightly less severe in the national average but potentially worse in states like California where May 2026 exceeded June 2022 peaks.
The key historical difference is that in 2022, crude prices spiked and fell rapidly over a 12-month period, whereas the February 2026 Strait closure represents an ongoing structural disruption with no clear resolution timeline. May 2026 is substantially higher than the pre-pandemic 2019 prices, which averaged around $2.80-$3.00 per gallon nationally. For consumers who have not experienced a price spike since 2022, the May 2026 pump prices represent a reminder that crude oil markets remain vulnerable to geopolitical shocks.
What Does This Mean for Drivers’ Budgets and Behavior?
A household spending $200 monthly on gasoline at pre-May-2026 prices (roughly $2.50 per gallon) now faces bills of $350-$380 monthly if driving patterns remain unchanged—a $150-$180 increase. Over a year, this adds $1,800-$2,160 to household transportation costs, money that would otherwise go to healthcare, housing, or savings. Consumers have responded by driving less, consolidating trips, and shifting purchases away from vehicle-dependent spending toward online or local shopping.
Drivers in states with the worst increases face steeper trade-offs. A California driver at $6 per gallon is spending nearly 2.5 times what they paid in early 2025, creating genuine affordability pressure—especially for low-income drivers without the option to work from home or use public transit. Conversely, consumers in states with moderate price increases (under 40% year-over-year) retain more purchasing power, illustrating how geographic location creates vastly different consumer impact from the same crude oil disruption.
Frequently Asked Questions
Why did gas prices jump so much between May 2025 and May 2026?
The primary cause was a February 2026 military incident that effectively closed the Strait of Hormuz, a critical chokepoint for global crude oil supplies. This pushed crude prices from $71 per barrel in February to $107 per barrel by May, driving pump prices 43.6% higher year-over-year.
Are gas prices expected to fall back to pre-May 2026 levels in 2026?
The EIA projects a 2026 average of $3.70 per gallon, suggesting prices will moderate from May highs but remain elevated above 2025 levels. GasBuddy predicts prices could eventually drop below $3 per gallon, though Trading Economics forecasts a range from $3.75 to $6.35, reflecting significant uncertainty around geopolitical stability.
Why is California’s gas price so much higher than the national average?
California has limited refinery capacity and cannot easily substitute crude supplies from other sources, making it vulnerable to price spikes. Regional fuel blends and environmental regulations also constrain supply, contributing to the $6+ per gallon prices seen in May 2026 versus $4.42-$4.56 nationally.
How much extra did drivers actually spend in May 2026 compared to May 2025?
A driver with a 15-gallon tank at the May 21, 2026 price of $4.56 per gallon paid $68.40, versus $30.70 at May 2025 prices around $2.05 per gallon—a $37.70 difference per fill-up, or roughly $20.70 per gallon over a year’s driving.
What could make gas prices fall faster than the EIA expects?
Resolution of the Strait of Hormuz closure, moderating global demand, or an economic recession that reduces driving would all contribute to faster price declines. Conversely, new supply disruptions or higher-than-expected crude demand could keep prices elevated much longer.
How do diesel prices relate to gasoline prices in this environment?
The EIA projects diesel at $4.80 per gallon for 2026, potentially remaining elevated even if gasoline prices moderate. Diesel powers heavy trucks and freight, so sustained high diesel prices increase transportation costs for goods, indirectly affecting consumer prices even as pump prices for gasoline fall.