Erwin, North Carolina · field elev 202 ft
Density Altitude at Harnett Regional Jetport (KHRJ)
Harnett Regional Jetport sits at 202 ft, and even a typical July afternoon (92 °F) only lifts density altitude to about 2,344 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 | 43.1 | −798 ft | 54.5 | −30 ft |
| February | 46.0 | −600 ft | 58.3 | 222 ft |
| March | 52.8 | −143 ft | 65.5 | 692 ft |
| April | 61.9 | 458 ft | 75.1 | 1,306 ft |
| May | 69.9 | 975 ft | 81.9 | 1,733 ft |
| June | 77.8 | 1,477 ft | 88.8 | 2,160 ft |
| July | 81.3 | 1,696 ft | 91.8 | 2,344 ft |
| August | 79.6 | 1,590 ft | 89.9 | 2,227 ft |
| September | 74.0 | 1,237 ft | 84.6 | 1,901 ft |
| October | 62.9 | 523 ft | 75.4 | 1,325 ft |
| November | 52.6 | −156 ft | 65.7 | 705 ft |
| December | 46.0 | −600 ft | 57.5 | 169 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 KHRJ
DENSITY ALTITUDE
Field elevation 202 ft — the air behaves like 2,356 ft.
- PRESSURE ALT
- 203 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 North Carolina fields
- 5W5 — Southern Wake Regional
Raleigh · elev 243 ft
- KJNX — Johnston Regional
Smithfield · elev 164 ft
- KTTA — Raleigh Exec Jetport At Sanford-Lee County
Sanford · elev 247 ft
- KFAY — Fayetteville Regional/Grannis Field
Fayetteville · elev 189 ft
- 2GC — Grays Creek
Fayetteville · elev 160 ft
- KRDU — Raleigh-Durham International
Raleigh/Durham · elev 435 ft
- KCTZ — Clinton-Sampson County
Clinton · elev 144 ft
- 5W4 — P K Airpark
Raeford · elev 304 ft
Frequently asked questions
How high does density altitude get at KHRJ in summer?
On a typical July afternoon — around 92 °F at the nearest NOAA normals station — density altitude at Harnett Regional Jetport reaches roughly 2,344 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 KHRJ on an average day?
It swings with the seasons: from roughly −798 ft at the coldest month's average temperature to about 1,696 ft at the warmest month's — all from a constant field elevation of 202 ft. The month-by-month table above carries the full year.
What is the field elevation of Harnett Regional Jetport?
202 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KHRJ (ICAO) / HRJ (FAA), in Erwin, North Carolina.