Arcata/Eureka, California · field elev 222 ft
Density Altitude at California Redwood Coast-Humboldt County (KACV)
California Redwood Coast-Humboldt County sits at 222 ft, and even a typical September afternoon (65 °F) only lifts density altitude to about 690 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 | 48.4 | −413 ft | 56.4 | 121 ft |
| February | 48.6 | −400 ft | 56.6 | 134 ft |
| March | 49.0 | −373 ft | 56.7 | 141 ft |
| April | 50.3 | −286 ft | 57.7 | 207 ft |
| May | 52.9 | −112 ft | 59.7 | 338 ft |
| June | 55.5 | 61 ft | 62.5 | 521 ft |
| July | 57.4 | 187 ft | 63.4 | 580 ft |
| August | 57.9 | 220 ft | 64.5 | 651 ft |
| September | 56.8 | 147 ft | 65.1 | 690 ft |
| October | 54.2 | −25 ft | 63.5 | 587 ft |
| November | 50.5 | −272 ft | 58.9 | 286 ft |
| December | 48.0 | −440 ft | 56.2 | 108 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 KACV
DENSITY ALTITUDE
Field elevation 222 ft — the air behaves like 684 ft.
- PRESSURE ALT
- 223 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
- KEKA — Murray Field
Eureka · elev 11 ft
- O33 — Samoa Field
Eureka · elev 20 ft
- O19 — Kneeland
Eureka · elev 2,741 ft
- O21 — Hoopa
Hoopa · elev 356 ft
- KFOT — Rohnerville
Fortuna · elev 393 ft
- S51 — Andy Mc Beth
Klamath Glen · elev 42 ft
- H47 — Hyampom
Hyampom · elev 1,277 ft
- D63 — Dinsmore
Dinsmore · elev 2,393 ft
Frequently asked questions
How high does density altitude get at KACV in summer?
On a typical September afternoon — around 65 °F at the nearest NOAA normals station — density altitude at California Redwood Coast-Humboldt County reaches roughly 690 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 KACV on an average day?
It swings with the seasons: from roughly −440 ft at the coldest month's average temperature to about 220 ft at the warmest month's — all from a constant field elevation of 222 ft. The month-by-month table above carries the full year.
What is the field elevation of California Redwood Coast-Humboldt County?
222 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KACV (ICAO) / ACV (FAA), in Arcata/Eureka, California.