Oil Prices in September 2018: WTI & Brent Daily Prices and Monthly Average
WTI average
$70.23
EIA monthly average
vs August 2018
+3.2%
$68.06
vs September 2017
+41.0%
$49.82
Brent average
$78.89
avg daily Brent − WTI +$8.72
WTI averaged $70.23 per barrel in September 2018, up $2.17 (3.2%) from August 2018. The average was 41% above the $49.82 of September 2017.
Daily spot prices, September 2018
Chart data table (20 rows)
| Period | WTI | Brent |
|---|---|---|
| Sep 28, 2018 | $73.16 | $82.72 |
| Sep 27, 2018 | $72.18 | $81.54 |
| Sep 26, 2018 | $72.22 | $81.87 |
| Sep 25, 2018 | $73.40 | $82.21 |
| Sep 24, 2018 | $73.23 | $80.89 |
| Sep 21, 2018 | $70.80 | $78.90 |
| Sep 20, 2018 | $70.77 | $79.03 |
| Sep 19, 2018 | $71.08 | $79.43 |
| Sep 18, 2018 | $69.87 | $79.25 |
| Sep 17, 2018 | $68.86 | $78.22 |
| Sep 14, 2018 | $68.98 | $77.87 |
| Sep 13, 2018 | $68.60 | $77.66 |
| Sep 12, 2018 | $70.37 | $80.02 |
| Sep 11, 2018 | $69.29 | $78.22 |
| Sep 10, 2018 | $67.55 | $76.77 |
| Sep 7, 2018 | $67.73 | $75.55 |
| Sep 6, 2018 | $67.81 | $75.67 |
| Sep 5, 2018 | $68.69 | $76.68 |
| Sep 4, 2018 | $69.82 | $77.51 |
| Sep 3, 2018 | — | $77.81 |
Prices dipped to $67.55 on Sep 10, 2018, then climbed to $73.40 on Sep 25, 2018 and ended at $73.16.
Brent averaged $78.89; its premium over WTI on matched dates averaged $8.72, with the daily Brent − WTI difference ranging from +$7.66 to +$9.65.
Adjusted with CPI-U, the September 2018 average equals $93.74 in September 2026 dollars.
September 2018 summary
| Measure | WTI | Brent |
|---|---|---|
| Monthly average | $70.23 | $78.89 |
| Change vs August 2018 | +$2.17 | +$6.36 |
| Change vs September 2017 | +$20.41 | +$22.74 |
| Highest daily price | $73.40 Sep 25, 2018 | $82.72 Sep 28, 2018 |
| Lowest daily price | $67.55 Sep 10, 2018 | $75.55 Sep 7, 2018 |
| Published daily observations | 19 | 20 |
| Average in September 2026 dollars (CPI-U) | $93.74 | $105.30 |
Monthly averages are EIA's published figures. Real figures use CPI-U for September 2018.
Source and methodology
| Provider | Series | Units | Coverage | Latest observation |
|---|---|---|---|---|
| U.S. Energy Information Administration | RWTC — WTI spot price FOB (daily, monthly) | $/bbl | Sep 4, 2018 – Sep 28, 2018 | Sep 28, 2018 |
| U.S. Energy Information Administration | RBRTE — Brent spot price FOB (daily, monthly) | $/bbl | Sep 3, 2018 – Sep 28, 2018 | Sep 28, 2018 |
| U.S. Bureau of Labor Statistics | CUUR0000SA0 — CPI-U, all items, NSA | index, 1982–84=100 | monthly | September 2026 |
Last updated: Oct 21, 2026, 5:27 PM CDT. Raw values are shown in source units; any conversion is labeled. See methodology and data sources.
Download:2018 daily prices (CSV)