Coalinga, California · field elev 470 ft
Density Altitude at Harris Ranch (3O8)
Harris Ranch sits at 470 ft, and even a typical July afternoon (99 °F) only lifts density altitude to about 3,116 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 | 48.2 | −119 ft | 58.6 | 572 ft |
| February | 52.5 | 169 ft | 64.7 | 970 ft |
| March | 57.4 | 493 ft | 71.2 | 1,387 ft |
| April | 62.0 | 795 ft | 77.0 | 1,754 ft |
| May | 69.8 | 1,298 ft | 85.9 | 2,308 ft |
| June | 76.0 | 1,691 ft | 94.2 | 2,815 ft |
| July | 81.0 | 2,005 ft | 99.2 | 3,116 ft |
| August | 79.9 | 1,936 ft | 97.8 | 3,032 ft |
| September | 76.0 | 1,691 ft | 93.5 | 2,773 ft |
| October | 66.1 | 1,060 ft | 82.3 | 2,086 ft |
| November | 55.2 | 348 ft | 69.2 | 1,259 ft |
| December | 47.6 | −160 ft | 58.7 | 579 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 3O8
DENSITY ALTITUDE
Field elevation 470 ft — the air behaves like 3,104 ft.
- PRESSURE ALT
- 471 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
- C80 — New Coalinga Municipal
Coalinga · elev 625 ft
- KHJO — Hanford Municipal
Hanford · elev 240 ft
- 0Q4 — Selma
Selma · elev 305 ft
- KFCH — Fresno Chandler Exec
Fresno · elev 280 ft
- F34 — Firebaugh
Firebaugh · elev 157 ft
- KPRB — Paso Robles Municipal
Paso Robles · elev 839 ft
- E79 — Sierra Sky Park
Fresno · elev 321 ft
- KFAT — Fresno Yosemite International
Fresno · elev 336 ft
Frequently asked questions
How high does density altitude get at 3O8 in summer?
On a typical July afternoon — around 99 °F at the nearest NOAA normals station — density altitude at Harris Ranch reaches roughly 3,116 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 3O8 on an average day?
It swings with the seasons: from roughly −160 ft at the coldest month's average temperature to about 2,005 ft at the warmest month's — all from a constant field elevation of 470 ft. The month-by-month table above carries the full year.
What is the field elevation of Harris Ranch?
470 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 3O8 (FAA), in Coalinga, California.