Portsmouth, Ohio · field elev 663 ft
Density Altitude at Greater Portsmouth Regional (KPMH)
Greater Portsmouth Regional sits at 663 ft, and even a typical July afternoon (87 °F) only lifts density altitude to about 2,593 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 | 32.1 | −984 ft | 41.3 | −348 ft |
| February | 35.1 | −775 ft | 45.2 | −82 ft |
| March | 43.8 | −177 ft | 55.0 | 573 ft |
| April | 54.7 | 554 ft | 67.3 | 1,375 ft |
| May | 64.1 | 1,169 ft | 75.8 | 1,915 ft |
| June | 72.4 | 1,700 ft | 83.4 | 2,390 ft |
| July | 76.1 | 1,934 ft | 86.7 | 2,593 ft |
| August | 74.7 | 1,846 ft | 86.0 | 2,550 ft |
| September | 68.2 | 1,433 ft | 80.3 | 2,197 ft |
| October | 56.3 | 659 ft | 68.9 | 1,477 ft |
| November | 44.8 | −109 ft | 56.3 | 659 ft |
| December | 36.7 | −664 ft | 45.7 | −48 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 KPMH
DENSITY ALTITUDE
Field elevation 663 ft — the air behaves like 2,611 ft.
- PRESSURE ALT
- 664 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 Ohio fields
- KJRO — James A Rhodes
Jackson · elev 726 ft
- KEOP — Pike County
Waverly · elev 661 ft
- KHTW — Lawrence County Airpark
Chesapeake/Huntington Wva · elev 567 ft
- KGAS — Gallia-Meigs Regional
Gallipolis · elev 566 ft
- KAMT — Alexander Salamon
West Union · elev 896 ft
- 22I — Vinton County
Mc Arthur · elev 954 ft
- KUNI — Ohio University
Athens/Albany · elev 766 ft
- KRZT — Ross County
Chillicothe · elev 725 ft
Frequently asked questions
How high does density altitude get at KPMH in summer?
On a typical July afternoon — around 87 °F at the nearest NOAA normals station — density altitude at Greater Portsmouth Regional reaches roughly 2,593 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 KPMH on an average day?
It swings with the seasons: from roughly −984 ft at the coldest month's average temperature to about 1,934 ft at the warmest month's — all from a constant field elevation of 663 ft. The month-by-month table above carries the full year.
What is the field elevation of Greater Portsmouth Regional?
663 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KPMH (ICAO) / PMH (FAA), in Portsmouth, Ohio.