Paris, Illinois · field elev 654 ft
Density Altitude at Edgar County (KPRG)
Edgar County sits at 654 ft, and even a typical July afternoon (84 °F) only lifts density altitude to about 2,440 ft — heat still trims performance, but the field rarely turns high-and-hot.
Typical density altitude by month
| Month | Avg temp °F | DA at avg temp | Afternoon high °F | DA on a typical afternoon |
|---|---|---|---|---|
| January | 25.3 | −1,475 ft | 34.0 | −862 ft |
| February | 29.3 | −1,191 ft | 38.8 | −530 ft |
| March | 39.5 | −482 ft | 49.9 | 223 ft |
| April | 51.4 | 323 ft | 62.8 | 1,073 ft |
| May | 62.1 | 1,028 ft | 73.0 | 1,727 ft |
| June | 71.2 | 1,613 ft | 81.6 | 2,267 ft |
| July | 74.1 | 1,797 ft | 84.4 | 2,440 ft |
| August | 72.3 | 1,683 ft | 83.0 | 2,354 ft |
| September | 65.8 | 1,267 ft | 77.7 | 2,024 ft |
| October | 54.1 | 503 ft | 65.5 | 1,248 ft |
| November | 41.0 | −379 ft | 50.8 | 283 ft |
| December | 30.6 | −1,100 ft | 38.8 | −530 ft |
▲ above 5,000 ft · ⚠ above 8,000 ft. These are planning references at standard pressure and dry air — afternoon humidity and low pressure both push the real number higher. Run today's values below.
Run today’s numbers for KPRG
DENSITY ALTITUDE
Field elevation 654 ft — the air behaves like 2,416 ft.
- PRESSURE ALT
- 655 ft
- ISA DEVIATION
- —
- RULE-OF-THUMB DA
- —
- AIR DENSITY INDEX
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- AIR DENSITY
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- WATER · GRAINS/LB
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For training and reference · verify with official sources and your POH before flight · no tool on this site renders a go / no-go judgment
Nearby Illinois fields
- 1H8 — Casey Municipal
Casey · elev 655 ft
- K96 — Tuscola
Tuscola · elev 665 ft
- KDNV — Vermilion Regional
Danville · elev 697 ft
- KMTO — Coles County Meml
Mattoon/Charleston · elev 722 ft
- KCMI — University Of Illinois/Willard
Champaign/Urbana · elev 755 ft
- C16 — Frasca Field
Urbana · elev 735 ft
- KRSV — Crawford County
Robinson · elev 461 ft
- KTIP — Rantoul Ntl Avn Cntr-Frank Elliott Field
Rantoul · elev 738 ft
Frequently asked questions
How high does density altitude get at KPRG in summer?
On a typical July afternoon — around 84 °F at the nearest NOAA normals station — density altitude at Edgar County reaches roughly 2,440 ft at standard pressure. Hotter-than-normal days, low pressure, and humidity all push it higher, so run the day's actual numbers before flying.
What is the density altitude at KPRG on an average day?
It swings with the seasons: from roughly −1,475 ft at the coldest month's average temperature to about 1,797 ft at the warmest month's — all from a constant field elevation of 654 ft. The month-by-month table above carries the full year.
What is the field elevation of Edgar County?
654 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KPRG (ICAO) / PRG (FAA), in Paris, Illinois.