Oil Prices in December 1999: WTI & Brent Daily Prices and Monthly Average
At $26.10 per barrel, December 1999's WTI average was the highest monthly average in nominal terms since December 1990, up $1.10 (4.4%) from November 1999. The average was 130% above the $11.35 of December 1998.
Daily spot prices, December 1999
Chart data table (21 rows; WTI on 21, Brent on 19)
| Period | WTI | Brent |
|---|---|---|
| Dec 30, 1999 | $25.76 | $24.93 |
| Dec 29, 1999 | $26.41 | $25.63 |
| Dec 28, 1999 | $26.81 | — |
| Dec 27, 1999 | $26.36 | — |
| Dec 23, 1999 | $25.86 | $25.11 |
| Dec 22, 1999 | $25.51 | $25.04 |
| Dec 21, 1999 | $26.34 | $25.51 |
| Dec 20, 1999 | $26.55 | $25.98 |
| Dec 17, 1999 | $26.76 | $26.22 |
| Dec 16, 1999 | $26.74 | $26.09 |
| Dec 15, 1999 | $26.28 | $25.68 |
| Dec 14, 1999 | $25.87 | $24.88 |
| Dec 13, 1999 | $25.37 | $24.31 |
| Dec 10, 1999 | $25.21 | $24.86 |
| Dec 9, 1999 | $26.00 | $25.85 |
| Dec 8, 1999 | $26.69 | $25.45 |
| Dec 7, 1999 | $26.36 | $26.10 |
| Dec 6, 1999 | $26.67 | $26.46 |
| Dec 3, 1999 | $25.71 | $26.17 |
| Dec 2, 1999 | $25.88 | $25.52 |
| Dec 1, 1999 | $25.01 | $24.20 |
The month's range ran from $25.01 on Dec 1, 1999 to $26.81 on Dec 28, 1999; the last price was $25.76 on Dec 30, 1999.
Brent averaged $25.47, within a dollar of WTI on average across the 19 dates when both were published.
Among the 40 December averages EIA has published, 1999's ranks 14th lowest. Within 1999 it ranks the highest of the 12 monthly averages. In October 2026 dollars (CPI-U), the average equals $52.34 and the high of $26.81 equals $53.77.
December 1999 summary
| Measure | WTI | Brent |
|---|---|---|
| Monthly average | $26.10 | $25.47 |
| Change vs November 1999 | +$1.10 | +$0.89 |
| Change vs December 1998 | +$14.75 | +$15.65 |
| Highest daily price | $26.81 Dec 28, 1999 | $26.46 Dec 6, 1999 |
| Lowest daily price | $25.01 Dec 1, 1999 | $24.20 Dec 1, 1999 |
| Published daily observations | 21 | 19 |
| Average in October 2026 dollars (CPI-U) | $52.34 | $51.08 |
Monthly averages are EIA's published figures. Real figures use CPI-U for December 1999.
December in other years
| Year | WTI average | vs December 1999 | Real |
|---|---|---|---|
| 2025 | $57.97 | +122.1% | $60.38 |
| 2024 | $70.12 | +168.7% | $74.99 |
| 2023 | $71.90 | +175.5% | $79.11 |
| 2022 | $76.44 | +192.9% | $86.93 |
| 2021 | $71.71 | +174.8% | $86.81 |
| 2020 | $47.02 | +80.2% | $60.93 |
| 2019 | $59.88 | +129.4% | $78.65 |
| 2018 | $49.52 | +89.7% | $66.53 |
| 2017 | $57.88 | +121.8% | $79.24 |
| 2016 | $51.97 | +99.1% | $72.65 |
| 2015 | $37.19 | +42.5% | $53.07 |
| 2014 | $59.29 | +127.2% | $85.22 |
| 2013 | $97.63 | +274.1% | $141.39 |
| 2012 | $87.86 | +236.6% | $129.15 |
| 2011 | $98.56 | +277.6% | $147.40 |
| 2010 | $89.15 | +241.6% | $137.28 |
| 2009 | $74.47 | +185.3% | $116.39 |
| 2008 | $41.12 | +57.5% | $66.02 |
| 2007 | $91.69 | +251.3% | $147.34 |
| 2006 | $61.96 | +137.4% | $103.63 |
| 2005 | $59.41 | +127.6% | $101.89 |
| 2004 | $43.15 | +65.3% | $76.53 |
| 2003 | $32.13 | +23.1% | $58.84 |
| 2002 | $29.46 | +12.9% | $54.96 |
| 2001 | $19.39 | −25.7% | $37.04 |
| 2000 | $28.44 | +9.0% | $55.17 |
| 1999 | $26.10 | — | $52.34 |
| 1998 | $11.35 | −56.5% | $23.37 |
| 1997 | $18.33 | −29.8% | $38.35 |
| 1996 | $25.23 | −3.3% | $53.69 |
| 1995 | $19.03 | −27.1% | $41.84 |
| 1994 | $17.16 | −34.3% | $38.69 |
| 1993 | $14.52 | −44.4% | $33.61 |
| 1992 | $19.41 | −25.6% | $46.17 |
| 1991 | $19.50 | −25.3% | $47.73 |
| 1990 | $27.28 | +4.5% | $68.81 |
| 1989 | $21.10 | −19.2% | $56.47 |
| 1988 | $16.38 | −37.2% | $45.88 |
| 1987 | $17.28 | −33.8% | $50.54 |
| 1986 | $16.11 | −38.3% | $49.21 |
“—” 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 December 1999.
Source and methodology
| Provider | Series | Units | Coverage | Latest observation |
|---|---|---|---|---|
| U.S. Energy Information Administration | RWTC — WTI spot price FOB (daily, monthly) | $/bbl | Dec 1, 1999 – Dec 30, 1999 | Dec 30, 1999 |
| U.S. Energy Information Administration | RBRTE — Brent spot price FOB (daily, monthly) | $/bbl | Dec 1, 1999 – Dec 30, 1999 | Dec 30, 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)