Eureka, California · field elev 2,741 ft
Density Altitude at Kneeland (O19)
From a field elevation of 2,741 ft, a typical July afternoon at Kneeland (96 °F) raises density altitude to about 5,670 ft — solidly into the range where performance charts deserve a close read.
Typical density altitude by month
| Month | Avg temp °F | DA at avg temp | Afternoon high °F | DA on a typical afternoon |
|---|---|---|---|---|
| January | 37.4 | 1,970 ft | 44.6 | 2,453 ft |
| February | 41.2 | 2,226 ft | 51.4 | 2,903 ft |
| March | 46.0 | 2,546 ft | 58.6 | 3,370 ft |
| April | 50.7 | 2,857 ft | 65.5 | 3,811 ft |
| May | 58.7 | 3,377 ft | 75.4 | 4,431 ft |
| June | 65.5 | 3,811 ft | 84.7 | 5,000 ft ▲ |
| July | 74.1 | 4,350 ft | 95.9 | 5,670 ft ▲ |
| August | 72.1 | 4,226 ft | 93.9 | 5,552 ft ▲ |
| September | 67.2 | 3,918 ft | 89.3 | 5,277 ft ▲ |
| October | 53.5 | 3,040 ft | 69.7 | 4,075 ft |
| November | 43.4 | 2,373 ft | 53.7 | 3,053 ft |
| December | 36.5 | 1,908 ft | 42.5 | 2,313 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 O19
DENSITY ALTITUDE caution
Field elevation 2,741 ft — the air behaves like 5,676 ft.
- PRESSURE ALT
- 2,743 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
- KFOT — Rohnerville
Fortuna · elev 393 ft
- KACV — California Redwood Coast-Humboldt County
Arcata/Eureka · elev 222 ft
- D63 — Dinsmore
Dinsmore · elev 2,393 ft
- H47 — Hyampom
Hyampom · elev 1,277 ft
- O21 — Hoopa
Hoopa · elev 356 ft
- F62 — Hayfork
Hayfork · elev 2,334 ft
Frequently asked questions
How high does density altitude get at O19 in summer?
On a typical July afternoon — around 96 °F at the nearest NOAA normals station — density altitude at Kneeland reaches roughly 5,670 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 O19 on an average day?
It swings with the seasons: from roughly 1,908 ft at the coldest month's average temperature to about 4,350 ft at the warmest month's — all from a constant field elevation of 2,741 ft. The month-by-month table above carries the full year.
What is the field elevation of Kneeland?
2,741 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is O19 (FAA), in Eureka, California.