O’Fallon MO Gas & Diesel Watch: AAA shows St. Louis-area regular gas and diesel easing

Today’s O’Fallon-area fuel update (AAA St. Louis metro proxy): AAA’s latest St. Louis (MO only) metro averages show both regular gas and diesel easing compared with last month—while staying well above a year ago.

Regular gas: easing since last month (AAA metro averages)

Regular gas (St. Louis, MO only): $3.4860 (current, as of 7/14/26).

For context, AAA shows:

Yesterday: $3.4960
Week ago: $3.4890
Month ago: $3.8330
Year ago: $2.9110

Diesel: edging lower short-term, down more vs last month

Diesel (St. Louis, MO only): $4.3260 (current, as of 7/14/26).

For context, AAA shows:

Yesterday: $4.3360
Week ago: $4.3600
Month ago: $4.9700
Year ago: $3.3750

National context: U.S. week-to-week movement isn’t the same as the local proxy

In its latest weekly retail update, EIA listed:

U.S. regular gasoline: $3.855 for 07/13/26 vs $3.777 for 07/06/26
U.S. on-highway diesel: $4.796 for 07/13/26 vs $4.578 for 07/06/26

What this can mean for O’Fallon-area drivers

If you’re commuting, planning weekend errands, or doing any extra driving this week, the modest day-to-day dip in the proxy averages may be enough to influence when it feels “worth it” to fill up—though your actual pump price in O’Fallon can still vary station to station.

For delivery drivers, contractors, and other diesel users, the bigger shift versus last month can matter for routing, jobsite scheduling, and weekly operating costs—even though the year-ago gap suggests fuel budgeting still needs attention.

Share what you’re seeing: What are the highest and lowest regular gas and diesel prices you’re seeing locally around O’Fallon right now?

Sources

Look for updates to this story

Discover more from Interactive News

Subscribe to get the latest posts sent to your email.