Santa Ana, California · field elev 56 ft
Density Altitude at John Wayne/Orange County (KSNA)
John Wayne/Orange County sits at 56 ft, and even a typical August afternoon (80 °F) only lifts density altitude to about 1,461 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 | 57.8 | 8 ft | 67.0 | 609 ft |
| February | 58.4 | 48 ft | 66.7 | 590 ft |
| March | 60.0 | 153 ft | 67.7 | 654 ft |
| April | 62.6 | 323 ft | 70.2 | 815 ft |
| May | 65.3 | 499 ft | 71.3 | 885 ft |
| June | 68.3 | 693 ft | 74.1 | 1,064 ft |
| July | 72.5 | 962 ft | 78.9 | 1,367 ft |
| August | 73.8 | 1,045 ft | 80.4 | 1,461 ft |
| September | 72.5 | 962 ft | 79.9 | 1,430 ft |
| October | 67.8 | 661 ft | 76.5 | 1,216 ft |
| November | 62.6 | 323 ft | 71.9 | 924 ft |
| December | 57.4 | −18 ft | 66.5 | 577 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 KSNA
DENSITY ALTITUDE
Field elevation 56 ft — the air behaves like 1,436 ft.
- PRESSURE ALT
- 57 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 California fields
- KFUL — Fullerton Municipal
Fullerton · elev 96 ft
- KLGB — Long Beach (Daugherty Field)
Long Beach · elev 60 ft
- KAJO — Corona Municipal
Corona · elev 533 ft
- KCNO — Chino
Chino · elev 650 ft
- KCPM — Compton/Woodley
Compton · elev 99 ft
- KTOA — Zamperini Field
Torrance · elev 103 ft
- KPOC — Brackett Field
La Verne · elev 1,014 ft
- KEMT — San Gabriel Valley
El Monte · elev 296 ft
Frequently asked questions
How high does density altitude get at KSNA in summer?
On a typical August afternoon — around 80 °F at the nearest NOAA normals station — density altitude at John Wayne/Orange County reaches roughly 1,461 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 KSNA on an average day?
It swings with the seasons: from roughly −18 ft at the coldest month's average temperature to about 1,045 ft at the warmest month's — all from a constant field elevation of 56 ft. The month-by-month table above carries the full year.
What is the field elevation of John Wayne/Orange County?
56 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KSNA (ICAO) / SNA (FAA), in Santa Ana, California.