Casey, Illinois · field elev 655 ft
Density Altitude at Casey Municipal (1H8)
Casey Municipal sits at 655 ft, and even a typical July afternoon (88 °F) only lifts density altitude to about 2,645 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 | 28.4 | −1,254 ft | 37.5 | −618 ft |
| February | 32.4 | −973 ft | 42.5 | −276 ft |
| March | 42.6 | −269 ft | 53.2 | 444 ft |
| April | 54.0 | 497 ft | 65.2 | 1,230 ft |
| May | 64.9 | 1,210 ft | 75.9 | 1,912 ft |
| June | 73.4 | 1,754 ft | 84.0 | 2,417 ft |
| July | 76.7 | 1,962 ft | 87.7 | 2,645 ft |
| August | 75.2 | 1,868 ft | 86.3 | 2,559 ft |
| September | 68.1 | 1,416 ft | 80.8 | 2,218 ft |
| October | 56.4 | 656 ft | 68.7 | 1,455 ft |
| November | 43.8 | −187 ft | 54.1 | 504 ft |
| December | 33.2 | −917 ft | 42.1 | −303 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 1H8
DENSITY ALTITUDE
Field elevation 655 ft — the air behaves like 2,663 ft.
- PRESSURE ALT
- 656 ft
- ISA DEVIATION
- —
- RULE-OF-THUMB DA
- —
- AIR DENSITY INDEX
- —
- AIR DENSITY
- —
- WATER · GRAINS/LB
- —
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
- KMTO — Coles County Meml
Mattoon/Charleston · elev 722 ft
- KRSV — Crawford County
Robinson · elev 461 ft
- 1H2 — Effingham County Regional
Effingham · elev 585 ft
- KPRG — Edgar County
Paris · elev 654 ft
- 2T2 — Percival Springs
Watson · elev 552 ft
- K96 — Tuscola
Tuscola · elev 665 ft
- KOLY — Olney-Noble
Olney-Noble · elev 482 ft
- KLWV — Lawrenceville-Vincennes International
Lawrenceville · elev 430 ft
Frequently asked questions
How high does density altitude get at 1H8 in summer?
On a typical July afternoon — around 88 °F at the nearest NOAA normals station — density altitude at Casey Municipal reaches roughly 2,645 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 1H8 on an average day?
It swings with the seasons: from roughly −1,254 ft at the coldest month's average temperature to about 1,962 ft at the warmest month's — all from a constant field elevation of 655 ft. The month-by-month table above carries the full year.
What is the field elevation of Casey Municipal?
655 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 1H8 (FAA), in Casey, Illinois.