Effingham, Illinois · field elev 585 ft
Density Altitude at Effingham County Regional (1H2)
Effingham County Regional sits at 585 ft, and even a typical July afternoon (89 °F) only lifts density altitude to about 2,608 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 | 28.8 | −1,313 ft | 37.4 | −713 ft |
| February | 33.0 | −1,018 ft | 42.5 | −363 ft |
| March | 42.9 | −335 ft | 53.5 | 378 ft |
| April | 54.2 | 424 ft | 65.9 | 1,189 ft |
| May | 64.9 | 1,124 ft | 76.2 | 1,845 ft |
| June | 74.0 | 1,706 ft | 85.1 | 2,399 ft |
| July | 77.2 | 1,908 ft | 88.5 | 2,608 ft |
| August | 75.4 | 1,794 ft | 87.2 | 2,529 ft |
| September | 68.4 | 1,349 ft | 81.2 | 2,158 ft |
| October | 56.4 | 569 ft | 68.8 | 1,375 ft |
| November | 43.9 | −267 ft | 54.0 | 411 ft |
| December | 33.8 | −962 ft | 42.2 | −383 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 1H2
DENSITY ALTITUDE
Field elevation 585 ft — the air behaves like 2,639 ft.
- PRESSURE ALT
- 586 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
- 2T2 — Percival Springs
Watson · elev 552 ft
- KFOA — Flora Municipal
Flora · elev 473 ft
- 2H0 — Shelby County
Shelbyville · elev 619 ft
- KOLY — Olney-Noble
Olney-Noble · elev 482 ft
- KMTO — Coles County Meml
Mattoon/Charleston · elev 722 ft
- 1H8 — Casey Municipal
Casey · elev 655 ft
- KVLA — Vandalia Municipal
Vandalia · elev 537 ft
- KSLO — Salem-Leckrone
Salem · elev 573 ft
Frequently asked questions
How high does density altitude get at 1H2 in summer?
On a typical July afternoon — around 89 °F at the nearest NOAA normals station — density altitude at Effingham County Regional reaches roughly 2,608 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 1H2 on an average day?
It swings with the seasons: from roughly −1,313 ft at the coldest month's average temperature to about 1,908 ft at the warmest month's — all from a constant field elevation of 585 ft. The month-by-month table above carries the full year.
What is the field elevation of Effingham County Regional?
585 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 1H2 (FAA), in Effingham, Illinois.