Oil Prices in August 1999: WTI & Brent Daily Prices and Monthly Average
At $21.28 per barrel, August 1999's WTI average was the highest monthly average in nominal terms since October 1997, up $1.18 (5.9%) from July 1999. The average was 58% above the $13.47 of August 1998.
Daily spot prices, August 1999
Chart data table (22 rows; WTI on 22, Brent on 21)
| Period | WTI | Brent |
|---|---|---|
| Aug 31, 1999 | $22.15 | $21.08 |
| Aug 30, 1999 | $21.93 | — |
| Aug 27, 1999 | $21.31 | $20.32 |
| Aug 26, 1999 | $21.09 | $19.80 |
| Aug 25, 1999 | $20.66 | $19.71 |
| Aug 24, 1999 | $21.36 | $20.48 |
| Aug 23, 1999 | $21.61 | $20.96 |
| Aug 20, 1999 | $21.66 | $21.11 |
| Aug 19, 1999 | $21.86 | $20.92 |
| Aug 18, 1999 | $21.54 | $20.69 |
| Aug 17, 1999 | $21.70 | $20.61 |
| Aug 16, 1999 | $21.34 | $20.68 |
| Aug 13, 1999 | $21.67 | $20.61 |
| Aug 12, 1999 | $21.42 | $20.32 |
| Aug 11, 1999 | $21.54 | $20.58 |
| Aug 10, 1999 | $21.31 | $20.18 |
| Aug 9, 1999 | $21.26 | $19.34 |
| Aug 6, 1999 | $20.89 | $19.66 |
| Aug 5, 1999 | $20.67 | $19.64 |
| Aug 4, 1999 | $20.49 | $19.38 |
| Aug 3, 1999 | $20.21 | $19.32 |
| Aug 2, 1999 | $20.46 | $19.21 |
Prices rose over the month, from $20.46 on Aug 2, 1999 to $22.15 on Aug 31, 1999.
Brent averaged $20.22, on matched dates $1.03 below WTI on average across 21 dates.
Among the 41 August averages EIA has published, 1999's ranks 10th lowest. Within 1999 it ranks 5th highest of the 12 monthly averages. The high was $22.15 on Aug 31, 1999 and the low $20.21 on Aug 3, 1999. In October 2026 dollars (CPI-U), the average equals $42.98 and the high of $22.15 equals $44.74.
August 1999 summary
| Measure | WTI | Brent |
|---|---|---|
| Monthly average | $21.28 | $20.22 |
| Change vs July 1999 | +$1.18 | +$1.14 |
| Change vs August 1998 | +$7.81 | +$8.31 |
| Highest daily price | $22.15 Aug 31, 1999 | $21.11 Aug 20, 1999 |
| Lowest daily price | $20.21 Aug 3, 1999 | $19.21 Aug 2, 1999 |
| Published daily observations | 22 | 21 |
| Average in October 2026 dollars (CPI-U) | $42.98 | $40.84 |
Monthly averages are EIA's published figures. Real figures use CPI-U for August 1999.
August in other years
| Year | WTI average | vs August 1999 | Real |
|---|---|---|---|
| 2026 | $83.90 | +294.3% | $84.53 |
| 2025 | $64.86 | +204.8% | $67.57 |
| 2024 | $76.68 | +260.3% | $82.21 |
| 2023 | $81.39 | +282.5% | $89.47 |
| 2022 | $93.67 | +340.2% | $106.74 |
| 2021 | $67.70 | +218.1% | $83.52 |
| 2020 | $42.34 | +99.0% | $54.98 |
| 2019 | $54.81 | +157.6% | $72.10 |
| 2018 | $68.06 | +219.8% | $91.10 |
| 2017 | $48.04 | +125.8% | $66.04 |
| 2016 | $44.72 | +110.2% | $62.67 |
| 2015 | $42.87 | +101.5% | $60.71 |
| 2014 | $96.54 | +353.7% | $136.99 |
| 2013 | $106.57 | +400.8% | $153.79 |
| 2012 | $94.13 | +342.3% | $137.90 |
| 2011 | $86.33 | +305.7% | $128.62 |
| 2010 | $76.60 | +260.0% | $118.42 |
| 2009 | $71.05 | +233.9% | $111.10 |
| 2008 | $116.67 | +448.3% | $179.73 |
| 2007 | $72.36 | +240.0% | $117.46 |
| 2006 | $73.04 | +243.2% | $120.90 |
| 2005 | $64.99 | +205.4% | $111.68 |
| 2004 | $44.90 | +111.0% | $79.97 |
| 2003 | $31.57 | +48.4% | $57.72 |
| 2002 | $28.39 | +33.4% | $53.03 |
| 2001 | $27.37 | +28.6% | $52.04 |
| 2000 | $31.26 | +46.9% | $61.06 |
| 1999 | $21.28 | — | $42.98 |
| 1998 | $13.47 | −36.7% | $27.82 |
| 1997 | $19.95 | −6.3% | $41.87 |
| 1996 | $21.90 | +2.9% | $46.99 |
| 1995 | $18.02 | −15.3% | $39.78 |
| 1994 | $18.38 | −13.6% | $41.63 |
| 1993 | $18.01 | −15.4% | $41.98 |
| 1992 | $21.34 | +0.3% | $51.12 |
| 1991 | $21.69 | +1.9% | $53.59 |
| 1990 | $27.31 | +28.3% | $70.04 |
| 1989 | $18.58 | −12.7% | $50.33 |
| 1988 | $15.52 | −27.1% | $44.02 |
| 1987 | $20.31 | −4.6% | $59.92 |
| 1986 | $15.10 | −29.0% | $46.46 |
“—” 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 August 1999.
Source and methodology
| Provider | Series | Units | Coverage | Latest observation |
|---|---|---|---|---|
| U.S. Energy Information Administration | RWTC — WTI spot price FOB (daily, monthly) | $/bbl | Aug 2, 1999 – Aug 31, 1999 | Aug 31, 1999 |
| U.S. Energy Information Administration | RBRTE — Brent spot price FOB (daily, monthly) | $/bbl | Aug 2, 1999 – Aug 31, 1999 | Aug 31, 1999 |
| 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:1999 daily prices (CSV)