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Latest value: $21.04/Mcf for July 2026, −7.6% year over year (against July 2025). 451 monthly observations from January 1989 to July 2026, in US dollars per thousand cubic feet. Source: EIA (EIA route); context series, not an input to the Nowflation CPI Gauge.
| Period | Value |
|---|---|
| July 2026 | $21.04/Mcf |
| June 2026 | $19.71/Mcf |
| May 2026 | $15.39/Mcf |
| April 2026 | $14.29/Mcf |
| March 2026 | $12.10/Mcf |
| February 2026 | $11.40/Mcf |
| January 2026 | $9.65/Mcf |
| December 2025 | $9.48/Mcf |
| November 2025 | $10.56/Mcf |
| October 2025 | $15.45/Mcf |
| September 2025 | $21.51/Mcf |
| August 2025 | $23.18/Mcf |
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Cite: Nowflation, “EIA residential natural gas price — IL” (eia_res_natgas_il), data from EIA, retrieved October 18, 2026, https://nowflation.com/series/eia_res_natgas_il. The series at its source: EIA.
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