Spring’s cold air has frozen gas prices temporarily, says GasBuddy. The national average fell half a penny in the last week to $2.65 per gallon according to GasBuddy’s latest weekly survey of 135,000 gas stations.

“As markets have seen concern rise of a possible trade war between the U.S. and China, oil prices have been hit hard, leading gas prices to dramatically slow their recent ascent. While the pause button may be hit for the time being on the spring surge, it is still likely we’ll see prices advance again soon,” said Patrick DeHaan, head of petroleum analysis for GasBuddy. “Thankfully, the bulk of refinery maintenance is likely behind us, but keep in mind the volatility of the stock market has had a major influence on gas prices in the last year, so we may still be susceptible to sudden and dramatic change in U.S. policy and also susceptible to any lingering maintenance at the large refineries.”

Brewing concerns over trade policy with China sent oil prices down last week, helping to freeze gas prices for the time being. A barrel of West Texas Intermediate crude oil fell $2 per barrel in the last week. Meanwhile, data from the Energy Information Administration showed a 4.6 million barrel drop in oil inventories while gasoline inventories saw a 1.1 million barrel decline. Crude oil inventories stand 20% lower than last year and continue to be the reason for average gas prices being some 25 cents per gallon higher than a year ago. Refineries are likely past the prime of maintenance season, but while gas price increases will likely soon return, the rise may be more limited as we approach a peak price in the weeks ahead. The transition to summer gasoline is nearing completion across many areas of the country, ahead of a May 1 deadline refiners face to finish the move.

Looking state-by-state, the largest weekly changes in average gas prices were seen in: Michigan (-12 cents), Utah (+10 cents), Ohio (+7 cents), Idaho (+7 cents), Arizona (+5 cents), New Mexico (+3 cents), Nevada (+3 cents), Alaska (+2 cents), Louisiana (-3 cents) and Kentucky (+3 cents).

States with the lowest average gasoline prices: Missouri ($2.35), Arkansas ($2.37), Oklahoma ($2.39), Mississippi ($2.39), Texas ($2.41), Louisiana ($2.42), South Carolina ($2.42), Alabama ($2.43), Kansas ($2.45) and Tennessee ($2.46).

States with the highest average gasoline prices: California ($3.51), Hawaii ($3.47), Alaska ($3.12), Oregon ($3.05), Nevada ($3.05), Pennsylvania ($2.88), Utah ($2.85), Idaho ($2.85) and New York ($2.76).

Gas prices are likely to drift lower in a majority of areas for the early part of this week, before stabilizing or rising slightly later in the week- any improvement in trade concerns may propel markets, oil and gas prices higher by then.