Oil Prices in October 1991: WTI & Brent Daily Prices and Monthly Average
WTI averaged $23.23 per barrel in October 1991, up $1.34 (6.1%) from September 1991. The average was 36% below the $36.04 of October 1990.
Daily spot prices, October 1991
Chart data table (23 rows; WTI on 23, Brent on 23)
| Period | WTI | Brent |
|---|---|---|
| Oct 31, 1991 | $23.29 | $22.00 |
| Oct 30, 1991 | $23.11 | $21.95 |
| Oct 29, 1991 | $23.09 | $21.85 |
| Oct 28, 1991 | $23.24 | $21.90 |
| Oct 25, 1991 | $23.18 | $22.35 |
| Oct 24, 1991 | $23.47 | $22.25 |
| Oct 23, 1991 | $23.14 | $22.48 |
| Oct 22, 1991 | $23.47 | $22.65 |
| Oct 21, 1991 | $24.03 | $22.95 |
| Oct 18, 1991 | $24.12 | $23.00 |
| Oct 17, 1991 | $23.96 | $22.73 |
| Oct 16, 1991 | $23.67 | $22.60 |
| Oct 15, 1991 | $23.89 | $22.83 |
| Oct 14, 1991 | $23.48 | $22.60 |
| Oct 11, 1991 | $23.19 | $22.08 |
| Oct 10, 1991 | $23.01 | $22.13 |
| Oct 9, 1991 | $23.18 | $22.43 |
| Oct 8, 1991 | $23.02 | $21.95 |
| Oct 7, 1991 | $22.99 | $21.98 |
| Oct 4, 1991 | $22.64 | $21.83 |
| Oct 3, 1991 | $22.70 | $21.75 |
| Oct 2, 1991 | $22.34 | $21.30 |
| Oct 1, 1991 | $22.10 | $21.15 |
The month's range ran from $22.10 on Oct 1, 1991 to $24.12 on Oct 18, 1991; the last price was $23.29 on Oct 31, 1991.
Brent averaged $22.21, on matched dates $1.02 below WTI on average across 23 dates.
Among the 41 October averages EIA has published, 1991's ranks 13th lowest. Within 1991 it ranks 2nd highest of the 12 monthly averages. In October 2026 dollars (CPI-U), the average equals $57.06 and the high of $24.12 equals $59.25.
October 1991 summary
| Measure | WTI | Brent |
|---|---|---|
| Monthly average | $23.23 | $22.21 |
| Change vs September 1991 | +$1.34 | +$1.71 |
| Change vs October 1990 | −$12.81 | −$13.81 |
| Highest daily price | $24.12 Oct 18, 1991 | $23.00 Oct 18, 1991 |
| Lowest daily price | $22.10 Oct 1, 1991 | $21.15 Oct 1, 1991 |
| Published daily observations | 23 | 23 |
| Average in October 2026 dollars (CPI-U) | $57.06 | $54.56 |
Monthly averages are EIA's published figures. Real figures use CPI-U for October 1991.
October in other years
| Year | WTI average | vs October 1991 | Real |
|---|---|---|---|
| 2026 | $102.07 | +339.4% | $102.07 |
| 2025 | $60.89 | +162.1% | — |
| 2024 | $71.99 | +209.9% | $76.97 |
| 2023 | $85.64 | +268.7% | $93.95 |
| 2022 | $87.55 | +276.9% | $99.15 |
| 2021 | $81.48 | +250.8% | $99.43 |
| 2020 | $39.40 | +69.6% | $51.07 |
| 2019 | $53.96 | +132.3% | $70.77 |
| 2018 | $70.75 | +204.6% | $94.43 |
| 2017 | $51.58 | +122.0% | $70.58 |
| 2016 | $49.78 | +114.3% | $69.50 |
| 2015 | $46.22 | +99.0% | $65.59 |
| 2014 | $84.40 | +263.3% | $119.97 |
| 2013 | $100.54 | +332.8% | $145.30 |
| 2012 | $89.49 | +285.2% | $130.57 |
| 2011 | $86.32 | +271.6% | $128.67 |
| 2010 | $81.89 | +252.5% | $126.37 |
| 2009 | $75.72 | +226.0% | $118.22 |
| 2008 | $76.61 | +229.8% | $119.39 |
| 2007 | $85.80 | +269.3% | $138.60 |
| 2006 | $58.89 | +153.5% | $98.49 |
| 2005 | $62.26 | +168.0% | $105.49 |
| 2004 | $53.28 | +129.4% | $94.20 |
| 2003 | $30.34 | +30.6% | $55.35 |
| 2002 | $28.84 | +24.1% | $53.69 |
| 2001 | $22.17 | −4.6% | $42.11 |
| 2000 | $33.11 | +42.5% | $64.22 |
| 1999 | $22.69 | −2.3% | $45.53 |
| 1998 | $14.46 | −37.8% | $29.76 |
| 1997 | $21.33 | −8.2% | $44.55 |
| 1996 | $24.88 | +7.1% | $53.05 |
| 1995 | $17.43 | −25.0% | $38.27 |
| 1994 | $17.72 | −23.7% | $40.00 |
| 1993 | $18.15 | −21.9% | $42.04 |
| 1992 | $21.69 | −6.6% | $51.63 |
| 1991 | $23.23 | — | $57.06 |
| 1990 | $36.04 | +55.1% | $91.12 |
| 1989 | $20.10 | −13.5% | $54.01 |
| 1988 | $13.77 | −40.7% | $38.66 |
| 1987 | $19.86 | −14.5% | $58.14 |
| 1986 | $14.90 | −35.9% | $45.59 |
“—” in the real column means BLS has published no CPI-U for that month. The comparison column shows how far that year's average was from October 1991.
Source and methodology
| Provider | Series | Units | Coverage | Latest observation |
|---|---|---|---|---|
| U.S. Energy Information Administration | RWTC — WTI spot price FOB (daily, monthly) | $/bbl | Oct 1, 1991 – Oct 31, 1991 | Oct 31, 1991 |
| U.S. Energy Information Administration | RBRTE — Brent spot price FOB (daily, monthly) | $/bbl | Oct 1, 1991 – Oct 31, 1991 | Oct 31, 1991 |
| U.S. Bureau of Labor Statistics | CUUR0000SA0 — CPI-U, all items, NSA | index, 1982–84=100 | monthly | October 2026 |
Last updated: Nov 10, 2026, 7:01 PM CST. Raw values are shown in source units; any conversion is labeled. See methodology and data sources.
Download:1991 daily prices (CSV)