Oil Prices in 1999: WTI & Brent History and Monthly Averages
WTI average
$19.34
EIA annual average
WTI vs prior year
+34.1%
1998: $14.42
Brent average
$17.90
EIA annual average
Brent vs prior year
+40.3%
1998: $12.76
WTI averaged $19.34 per barrel in 1999, up $4.92 (34.1%) from 1998; that was the highest annual average since 1997.
Monthly average prices in 1999
| Month | WTI avg | WTI high | WTI low | Brent avg | Brent − WTI (matched dates) | WTI (September 2026 $) | Brent (September 2026 $) |
|---|---|---|---|---|---|---|---|
| January | $12.52 | $13.43 | $11.82 | $11.11 | −$1.38 | $25.68 | $22.78 |
| February | $12.01 | $12.61 | $11.38 | $10.27 | −$1.74 | $24.60 | $21.04 |
| March | $14.68 | $16.66 | $12.28 | $12.51 | −$2.17 | $29.98 | $25.55 |
| April | $17.31 | $18.69 | $15.92 | $15.29 | −$2.04 | $35.09 | $31.00 |
| May | $17.72 | $18.94 | $16.77 | $15.23 | −$2.43 | $35.92 | $30.88 |
| June | $17.92 | $19.33 | $16.31 | $15.86 | −$2.06 | $36.33 | $32.15 |
| July | $20.10 | $21.09 | $19.38 | $19.08 | −$1.02 | $40.63 | $38.57 |
| August | $21.28 | $22.15 | $20.21 | $20.22 | −$1.03 | $42.91 | $40.77 |
| September | $23.80 | $24.81 | $21.54 | $22.54 | −$1.19 | $47.76 | $45.23 |
| October | $22.69 | $24.51 | $20.81 | $22.00 | −$0.69 | $45.45 | $44.07 |
| November | $25.00 | $28.03 | $22.44 | $24.58 | −$0.48 | $50.05 | $49.21 |
| December | $26.10 | $26.81 | $25.01 | $25.47 | −$0.58 | $52.25 | $50.99 |
Monthly averages are EIA's published figures. Brent − WTI is the average over dates with both prices published, so it can differ from the difference between the two monthly averages. Inflation-adjusted columns use CPI-U for each month, expressed in September 2026 dollars; “—” means CPI-U for that month is not available.
From $11.38 on Feb 16, 1999, WTI climbed to $28.03 by Nov 22, 1999, a 146% gain. The price finished the year 107% above its first 1999 close of $12.42. Second-half prices averaged $23.15, up from $15.45 in the first half. It was below $20 on 135 days.
Brent traded below WTI throughout 1999: its monthly average was lower in every month, and on the 246 matched dates it averaged $1.40 less. Brent averaged $17.90, up $5.14 (40.3%) from 1998.
The monthly average was lowest in February ($12.01) and highest in December ($26.10). In September 2026 dollars (CPI-U), the 1999 average is $39.11, lower than 2025's real average by $29.32 (42.8%). The 1990s as a whole averaged $19.70, so 1999 ran below its decade. Of 40 complete years with an EIA annual average, 1999 ranks 8th lowest.
1999 summary statistics
| Measure | WTI | Brent | Brent − WTI |
|---|---|---|---|
| Average | $19.34 | $17.90 | −$1.40 |
| Change vs 1998 average | +$4.92 | +$5.14 | +$0.26 |
| Highest daily price | $28.03 Nov 22, 1999 | $26.46 Dec 6, 1999 | — |
| Lowest daily price | $11.38 Feb 16, 1999 | $9.77 Feb 9, 1999 | — |
| Highest daily spread | — | — | +$1.05 Nov 10, 1999 |
| Lowest daily spread | — | — | −$3.28 Mar 10, 1999 |
| First observation | $12.42 Jan 4, 1999 | $10.94 Jan 4, 1999 | — |
| Last observation | $25.76 Dec 30, 1999 | $24.93 Dec 30, 1999 | — |
| Published daily observations | 251 | 249 | 246 matched |
| Average in September 2026 dollars | $39.11 | $36.20 | — |
Daily spot prices in 1999
Show all 254 dates (Jan 4, 1999 – Dec 30, 1999)
| Date | WTI | Brent | Brent − WTI |
|---|---|---|---|
| Jan 4, 1999 | $12.42 | $10.94 | −$1.48 |
| Jan 5, 1999 | $12.04 | $10.30 | −$1.74 |
| Jan 6, 1999 | $12.84 | $10.67 | −$2.17 |
| Jan 7, 1999 | $12.99 | $11.08 | −$1.91 |
| Jan 8, 1999 | $13.06 | $11.70 | −$1.36 |
| Jan 11, 1999 | $13.43 | $12.07 | −$1.36 |
| Jan 12, 1999 | $12.91 | $11.78 | −$1.13 |
| Jan 13, 1999 | $12.33 | $10.90 | −$1.43 |
| Jan 14, 1999 | $12.23 | $11.10 | −$1.13 |
| Jan 15, 1999 | $12.21 | $10.97 | −$1.24 |
| Jan 18, 1999 | — | $10.81 | — |
| Jan 19, 1999 | $12.13 | $11.19 | −$0.94 |
| Jan 20, 1999 | $11.82 | $10.85 | −$0.97 |
| Jan 21, 1999 | $12.45 | $11.14 | −$1.31 |
| Jan 22, 1999 | $12.62 | $11.23 | −$1.39 |
| Jan 25, 1999 | $12.41 | $11.21 | −$1.20 |
| Jan 26, 1999 | $12.16 | $10.84 | −$1.32 |
| Jan 27, 1999 | $12.40 | $11.03 | −$1.37 |
| Jan 28, 1999 | $12.52 | $11.14 | −$1.38 |
| Jan 29, 1999 | $12.81 | $11.34 | −$1.47 |
| Feb 1, 1999 | $12.36 | $10.81 | −$1.55 |
| Feb 2, 1999 | $12.21 | $10.39 | −$1.82 |
| Feb 3, 1999 | $12.42 | $10.78 | −$1.64 |
| Feb 4, 1999 | $11.94 | $10.42 | −$1.52 |
| Feb 5, 1999 | $11.85 | $10.18 | −$1.67 |
| Feb 8, 1999 | $11.65 | $9.97 | −$1.68 |
| Feb 9, 1999 | $11.66 | $9.77 | −$1.89 |
| Feb 10, 1999 | $11.88 | $9.88 | −$2.00 |
| Feb 11, 1999 | $11.94 | $9.82 | −$2.12 |
| Feb 12, 1999 | $11.90 | $9.97 | −$1.93 |
| Feb 16, 1999 | $11.38 | $9.98 | −$1.40 |
| Feb 17, 1999 | $11.49 | $10.09 | −$1.40 |
| Feb 18, 1999 | $11.97 | $9.93 | −$2.04 |
| Feb 19, 1999 | $11.79 | $10.29 | −$1.50 |
| Feb 22, 1999 | $11.97 | $10.24 | −$1.73 |
| Feb 23, 1999 | $12.44 | $10.58 | −$1.86 |
| Feb 24, 1999 | $12.49 | $10.64 | −$1.85 |
| Feb 25, 1999 | $12.61 | $10.84 | −$1.77 |
| Feb 26, 1999 | $12.31 | $10.58 | −$1.73 |
| Mar 1, 1999 | $12.28 | $10.52 | −$1.76 |
| Mar 2, 1999 | $12.66 | $10.41 | −$2.25 |
| Mar 3, 1999 | $12.92 | $10.81 | −$2.11 |
| Mar 4, 1999 | $13.32 | $11.20 | −$2.12 |
| Mar 5, 1999 | $13.33 | $11.02 | −$2.31 |
| Mar 8, 1999 | $13.63 | $11.49 | −$2.14 |
| Mar 9, 1999 | $13.78 | $11.25 | −$2.53 |
| Mar 10, 1999 | $14.74 | $11.46 | −$3.28 |
| Mar 11, 1999 | $14.30 | $11.86 | −$2.44 |
| Mar 12, 1999 | $14.51 | $12.30 | −$2.21 |
| Mar 15, 1999 | $14.48 | $12.17 | −$2.31 |
| Mar 16, 1999 | $14.60 | $12.11 | −$2.49 |
| Mar 17, 1999 | $15.11 | $12.95 | −$2.16 |
| Mar 18, 1999 | $15.11 | $13.35 | −$1.76 |
| Mar 19, 1999 | $15.26 | $13.15 | −$2.11 |
| Mar 22, 1999 | $15.39 | $13.37 | −$2.02 |
| Mar 23, 1999 | $15.36 | $13.64 | −$1.72 |
| Mar 24, 1999 | $15.18 | $13.37 | −$1.81 |
| Mar 25, 1999 | $15.66 | $13.50 | −$2.16 |
| Mar 26, 1999 | $16.16 | $13.97 | −$2.19 |
| Mar 29, 1999 | $16.46 | $14.34 | −$2.12 |
| Mar 30, 1999 | $16.66 | $14.50 | −$2.16 |
| Mar 31, 1999 | $16.66 | $15.02 | −$1.64 |
| Apr 1, 1999 | $16.65 | $14.60 | −$2.05 |
| Apr 5, 1999 | $16.94 | — | — |
| Apr 6, 1999 | $16.79 | $14.53 | −$2.26 |
| Apr 7, 1999 | $16.02 | $14.14 | −$1.88 |
| Apr 8, 1999 | $15.92 | $13.72 | −$2.20 |
| Apr 9, 1999 | $16.59 | $14.11 | −$2.48 |
| Apr 12, 1999 | $16.44 | $14.23 | −$2.21 |
| Apr 13, 1999 | $16.73 | $14.68 | −$2.05 |
| Apr 14, 1999 | $16.51 | $14.45 | −$2.06 |
| Apr 15, 1999 | $16.85 | $14.82 | −$2.03 |
| Apr 16, 1999 | $17.34 | $15.34 | −$2.00 |
| Apr 19, 1999 | $17.82 | $16.01 | −$1.81 |
| Apr 20, 1999 | $17.79 | $16.04 | −$1.75 |
| Apr 21, 1999 | $18.05 | $15.96 | −$2.09 |
| Apr 22, 1999 | $18.02 | $16.29 | −$1.73 |
| Apr 23, 1999 | $17.96 | $16.07 | −$1.89 |
| Apr 26, 1999 | $17.67 | $15.63 | −$2.04 |
| Apr 27, 1999 | $17.82 | $15.91 | −$1.91 |
| Apr 28, 1999 | $18.43 | $16.38 | −$2.05 |
| Apr 29, 1999 | $18.53 | $16.53 | −$2.00 |
| Apr 30, 1999 | $18.69 | $16.45 | −$2.24 |
| May 3, 1999 | $18.83 | — | — |
| May 4, 1999 | $18.94 | $16.98 | −$1.96 |
| May 5, 1999 | $18.89 | $16.85 | −$2.04 |
| May 6, 1999 | $18.23 | $16.44 | −$1.79 |
| May 7, 1999 | $18.23 | $15.66 | −$2.57 |
| May 10, 1999 | $18.57 | $15.72 | −$2.85 |
| May 11, 1999 | $17.84 | $15.23 | −$2.61 |
| May 12, 1999 | $17.44 | $14.74 | −$2.70 |
| May 13, 1999 | $18.11 | $15.21 | −$2.90 |
| May 14, 1999 | $18.04 | $15.18 | −$2.86 |
| May 17, 1999 | $17.76 | $14.98 | −$2.78 |
| May 18, 1999 | $17.09 | $14.43 | −$2.66 |
| May 19, 1999 | $16.77 | $14.42 | −$2.35 |
| May 20, 1999 | $17.04 | $14.44 | −$2.60 |
| May 21, 1999 | $17.22 | $14.49 | −$2.73 |
| May 24, 1999 | $16.77 | $14.83 | −$1.94 |
| May 25, 1999 | $17.25 | $14.71 | −$2.54 |
| May 26, 1999 | $17.32 | $15.18 | −$2.14 |
| May 27, 1999 | $17.18 | $15.04 | −$2.14 |
| May 28, 1999 | $16.85 | $14.75 | −$2.10 |
| Jun 1, 1999 | $16.31 | $14.22 | −$2.09 |
| Jun 2, 1999 | $16.61 | $14.28 | −$2.33 |
| Jun 3, 1999 | $16.81 | $14.26 | −$2.55 |
| Jun 4, 1999 | $17.36 | $15.21 | −$2.15 |
| Jun 7, 1999 | $17.91 | $15.98 | −$1.93 |
| Jun 8, 1999 | $17.66 | $16.25 | −$1.41 |
| Jun 9, 1999 | $17.98 | $16.19 | −$1.79 |
| Jun 10, 1999 | $17.82 | $15.99 | −$1.83 |
| Jun 11, 1999 | $18.45 | $16.25 | −$2.20 |
| Jun 14, 1999 | $18.24 | $16.05 | −$2.19 |
| Jun 15, 1999 | $18.61 | $16.33 | −$2.28 |
| Jun 16, 1999 | $17.92 | $16.29 | −$1.63 |
| Jun 17, 1999 | $18.25 | $16.00 | −$2.25 |
| Jun 18, 1999 | $18.01 | $15.93 | −$2.08 |
| Jun 21, 1999 | $17.79 | $15.64 | −$2.15 |
| Jun 22, 1999 | $17.62 | $15.91 | −$1.71 |
| Jun 23, 1999 | $18.42 | $16.04 | −$2.38 |
| Jun 24, 1999 | $18.26 | $16.28 | −$1.98 |
| Jun 25, 1999 | $18.17 | $16.27 | −$1.90 |
| Jun 28, 1999 | $18.22 | $16.27 | −$1.95 |
| Jun 29, 1999 | $18.56 | $16.38 | −$2.18 |
| Jun 30, 1999 | $19.33 | $16.97 | −$2.36 |
| Jul 1, 1999 | $19.39 | $17.25 | −$2.14 |
| Jul 2, 1999 | $19.70 | $17.55 | −$2.15 |
| Jul 6, 1999 | $19.78 | $18.47 | −$1.31 |
| Jul 7, 1999 | $19.98 | $18.36 | −$1.62 |
| Jul 8, 1999 | $19.76 | $18.74 | −$1.02 |
| Jul 9, 1999 | $19.94 | $18.90 | −$1.04 |
| Jul 12, 1999 | $19.92 | $18.94 | −$0.98 |
| Jul 13, 1999 | $20.33 | $19.49 | −$0.84 |
| Jul 14, 1999 | $19.89 | $19.48 | −$0.41 |
| Jul 15, 1999 | $20.26 | $18.90 | −$1.36 |
| Jul 16, 1999 | $20.66 | $19.42 | −$1.24 |
| Jul 19, 1999 | $20.28 | $19.75 | −$0.53 |
| Jul 20, 1999 | $19.38 | $19.33 | −$0.05 |
| Jul 21, 1999 | $19.54 | $18.62 | −$0.92 |
| Jul 22, 1999 | $19.84 | $19.01 | −$0.83 |
| Jul 23, 1999 | $20.41 | $19.69 | −$0.72 |
| Jul 26, 1999 | $20.49 | $19.73 | −$0.76 |
| Jul 27, 1999 | $20.40 | $19.46 | −$0.94 |
| Jul 28, 1999 | $20.61 | $19.65 | −$0.96 |
| Jul 29, 1999 | $21.09 | $19.97 | −$1.12 |
| Jul 30, 1999 | $20.52 | $19.97 | −$0.55 |
| Aug 2, 1999 | $20.46 | $19.21 | −$1.25 |
| Aug 3, 1999 | $20.21 | $19.32 | −$0.89 |
| Aug 4, 1999 | $20.49 | $19.38 | −$1.11 |
| Aug 5, 1999 | $20.67 | $19.64 | −$1.03 |
| Aug 6, 1999 | $20.89 | $19.66 | −$1.23 |
| Aug 9, 1999 | $21.26 | $19.34 | −$1.92 |
| Aug 10, 1999 | $21.31 | $20.18 | −$1.13 |
| Aug 11, 1999 | $21.54 | $20.58 | −$0.96 |
| Aug 12, 1999 | $21.42 | $20.32 | −$1.10 |
| Aug 13, 1999 | $21.67 | $20.61 | −$1.06 |
| Aug 16, 1999 | $21.34 | $20.68 | −$0.66 |
| Aug 17, 1999 | $21.70 | $20.61 | −$1.09 |
| Aug 18, 1999 | $21.54 | $20.69 | −$0.85 |
| Aug 19, 1999 | $21.86 | $20.92 | −$0.94 |
| Aug 20, 1999 | $21.66 | $21.11 | −$0.55 |
| Aug 23, 1999 | $21.61 | $20.96 | −$0.65 |
| Aug 24, 1999 | $21.36 | $20.48 | −$0.88 |
| Aug 25, 1999 | $20.66 | $19.71 | −$0.95 |
| Aug 26, 1999 | $21.09 | $19.80 | −$1.29 |
| Aug 27, 1999 | $21.31 | $20.32 | −$0.99 |
| Aug 30, 1999 | $21.93 | — | — |
| Aug 31, 1999 | $22.15 | $21.08 | −$1.07 |
| Sep 1, 1999 | $21.79 | $21.10 | −$0.69 |
| Sep 2, 1999 | $21.54 | $20.66 | −$0.88 |
| Sep 3, 1999 | $22.00 | $20.74 | −$1.26 |
| Sep 6, 1999 | — | $21.14 | — |
| Sep 7, 1999 | $22.58 | $21.71 | −$0.87 |
| Sep 8, 1999 | $22.64 | $21.96 | −$0.68 |
| Sep 9, 1999 | $23.24 | $22.51 | −$0.73 |
| Sep 10, 1999 | $23.55 | $22.36 | −$1.19 |
| Sep 13, 1999 | $24.18 | $22.98 | −$1.20 |
| Sep 14, 1999 | $23.86 | $23.18 | −$0.68 |
| Sep 15, 1999 | $24.10 | $23.25 | −$0.85 |
| Sep 16, 1999 | $24.52 | $23.06 | −$1.46 |
| Sep 17, 1999 | $24.72 | $22.93 | −$1.79 |
| Sep 20, 1999 | $24.32 | $22.85 | −$1.47 |
| Sep 21, 1999 | $24.48 | $22.68 | −$1.80 |
| Sep 22, 1999 | $24.26 | $22.49 | −$1.77 |
| Sep 23, 1999 | $24.76 | $23.41 | −$1.35 |
| Sep 24, 1999 | $24.81 | $23.66 | −$1.15 |
| Sep 27, 1999 | $24.63 | $23.60 | −$1.03 |
| Sep 28, 1999 | $24.52 | $23.24 | −$1.28 |
| Sep 29, 1999 | $24.69 | $23.46 | −$1.23 |
| Sep 30, 1999 | $24.54 | $22.98 | −$1.56 |
| Oct 1, 1999 | $24.51 | $22.98 | −$1.53 |
| Oct 4, 1999 | $23.71 | $23.30 | −$0.41 |
| Oct 5, 1999 | $23.37 | $22.64 | −$0.73 |
| Oct 6, 1999 | $23.24 | $23.07 | −$0.17 |
| Oct 7, 1999 | $22.46 | $22.33 | −$0.13 |
| Oct 8, 1999 | $20.81 | $20.78 | −$0.03 |
| Oct 11, 1999 | $21.58 | $20.84 | −$0.74 |
| Oct 12, 1999 | $22.93 | $21.89 | −$1.04 |
| Oct 13, 1999 | $22.93 | $22.26 | −$0.67 |
| Oct 14, 1999 | $22.46 | $22.28 | −$0.18 |
| Oct 15, 1999 | $22.81 | $21.65 | −$1.16 |
| Oct 18, 1999 | $22.44 | $22.26 | −$0.18 |
| Oct 19, 1999 | $22.36 | $21.59 | −$0.77 |
| Oct 20, 1999 | $22.21 | $21.02 | −$1.19 |
| Oct 21, 1999 | $22.74 | $21.68 | −$1.06 |
| Oct 22, 1999 | $23.48 | $22.38 | −$1.10 |
| Oct 25, 1999 | $23.22 | $22.45 | −$0.77 |
| Oct 26, 1999 | $23.17 | $22.14 | −$1.03 |
| Oct 27, 1999 | $22.71 | $22.18 | −$0.53 |
| Oct 28, 1999 | $21.59 | $21.22 | −$0.37 |
| Oct 29, 1999 | $21.79 | $21.11 | −$0.68 |
| Nov 1, 1999 | $22.44 | $21.32 | −$1.12 |
| Nov 2, 1999 | $22.49 | $21.98 | −$0.51 |
| Nov 3, 1999 | $22.59 | $22.38 | −$0.21 |
| Nov 4, 1999 | $23.17 | $22.64 | −$0.53 |
| Nov 5, 1999 | $22.93 | $22.80 | −$0.13 |
| Nov 8, 1999 | $23.28 | $23.62 | +$0.34 |
| Nov 9, 1999 | $24.21 | $24.44 | +$0.23 |
| Nov 10, 1999 | $24.37 | $25.42 | +$1.05 |
| Nov 11, 1999 | $24.33 | $24.96 | +$0.63 |
| Nov 12, 1999 | $24.91 | $25.39 | +$0.48 |
| Nov 15, 1999 | $25.31 | $25.93 | +$0.62 |
| Nov 16, 1999 | $26.04 | $24.88 | −$1.16 |
| Nov 17, 1999 | $26.57 | $24.98 | −$1.59 |
| Nov 18, 1999 | $25.71 | $25.02 | −$0.69 |
| Nov 19, 1999 | $26.61 | $25.14 | −$1.47 |
| Nov 22, 1999 | $28.03 | $25.86 | −$2.17 |
| Nov 23, 1999 | $26.91 | $25.66 | −$1.25 |
| Nov 24, 1999 | $27.22 | $25.77 | −$1.45 |
| Nov 25, 1999 | — | $25.94 | — |
| Nov 26, 1999 | $27.22 | $25.85 | −$1.37 |
| Nov 29, 1999 | $25.84 | $25.67 | −$0.17 |
| Nov 30, 1999 | $24.87 | $25.20 | +$0.33 |
| Dec 1, 1999 | $25.01 | $24.20 | −$0.81 |
| Dec 2, 1999 | $25.88 | $25.52 | −$0.36 |
| Dec 3, 1999 | $25.71 | $26.17 | +$0.46 |
| Dec 6, 1999 | $26.67 | $26.46 | −$0.21 |
| Dec 7, 1999 | $26.36 | $26.10 | −$0.26 |
| Dec 8, 1999 | $26.69 | $25.45 | −$1.24 |
| Dec 9, 1999 | $26.00 | $25.85 | −$0.15 |
| Dec 10, 1999 | $25.21 | $24.86 | −$0.35 |
| Dec 13, 1999 | $25.37 | $24.31 | −$1.06 |
| Dec 14, 1999 | $25.87 | $24.88 | −$0.99 |
| Dec 15, 1999 | $26.28 | $25.68 | −$0.60 |
| Dec 16, 1999 | $26.74 | $26.09 | −$0.65 |
| Dec 17, 1999 | $26.76 | $26.22 | −$0.54 |
| Dec 20, 1999 | $26.55 | $25.98 | −$0.57 |
| Dec 21, 1999 | $26.34 | $25.51 | −$0.83 |
| Dec 22, 1999 | $25.51 | $25.04 | −$0.47 |
| Dec 23, 1999 | $25.86 | $25.11 | −$0.75 |
| Dec 27, 1999 | $26.36 | — | — |
| Dec 28, 1999 | $26.81 | — | — |
| Dec 29, 1999 | $26.41 | $25.63 | −$0.78 |
| Dec 30, 1999 | $25.76 | $24.93 | −$0.83 |
“—” means EIA published no price for that benchmark on that date.
Source and methodology
| Provider | Series | Units | Coverage | Latest observation |
|---|---|---|---|---|
| U.S. Energy Information Administration | RWTC — WTI spot price FOB | $/bbl | Jan 4, 1999 – Dec 30, 1999 | Dec 30, 1999 |
| U.S. Energy Information Administration | RBRTE — Brent spot price FOB | $/bbl | Jan 4, 1999 – Dec 30, 1999 | Dec 30, 1999 |
| U.S. Bureau of Labor Statistics | CUUR0000SA0 — CPI-U, all items, NSA | index, 1982–84=100 | monthly and annual average | September 2026 |
Inflation adjustment: real = nominal × CPI-U(September 2026) ÷ CPI-U(period). Annual figures use the BLS annual average CPI-U; a year without one uses the mean of the months published so far.
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:1999 daily prices (CSV)