Novato, California · field elev 4 ft
Density Altitude at Gnoss Field (KDVO)
Gnoss Field sits at 4 ft, and even a typical September afternoon (82 °F) only lifts density altitude to about 1,473 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 | 48.3 | −691 ft | 57.6 | −69 ft |
| February | 50.8 | −522 ft | 61.3 | 174 ft |
| March | 53.2 | −361 ft | 64.5 | 383 ft |
| April | 55.8 | −188 ft | 67.8 | 597 ft |
| May | 59.6 | 63 ft | 71.9 | 860 ft |
| June | 64.3 | 370 ft | 78.1 | 1,253 ft |
| July | 66.6 | 519 ft | 80.8 | 1,423 ft |
| August | 67.0 | 545 ft | 81.2 | 1,448 ft |
| September | 66.5 | 513 ft | 81.6 | 1,473 ft |
| October | 62.0 | 220 ft | 76.4 | 1,146 ft |
| November | 53.9 | −315 ft | 65.5 | 448 ft |
| December | 48.1 | −704 ft | 57.9 | −49 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 KDVO
DENSITY ALTITUDE
Field elevation 4 ft — the air behaves like 1,498 ft.
- PRESSURE ALT
- 5 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
- 0Q3 — Sonoma Valley
Schellville/Sonoma · elev 16 ft
- O69 — Petaluma Municipal
Petaluma · elev 90 ft
- 0Q9 — Sonoma Skypark
Sonoma · elev 29 ft
- KAPC — Napa County
Napa · elev 36 ft
- KSTS — Charles M Schulz/Sonoma County
Santa Rosa · elev 129 ft
- KCCR — Buchanan Field
Concord · elev 26 ft
- 2O3 — Angwin-Parrett Field
Angwin · elev 1,875 ft
- KOAK — Oakland San Francisco Bay
Oakland · elev 9 ft
Frequently asked questions
How high does density altitude get at KDVO in summer?
On a typical September afternoon — around 82 °F at the nearest NOAA normals station — density altitude at Gnoss Field reaches roughly 1,473 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 KDVO on an average day?
It swings with the seasons: from roughly −704 ft at the coldest month's average temperature to about 545 ft at the warmest month's — all from a constant field elevation of 4 ft. The month-by-month table above carries the full year.
What is the field elevation of Gnoss Field?
4 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KDVO (ICAO) / DVO (FAA), in Novato, California.