Petaluma, California · field elev 90 ft
Density Altitude at Petaluma Municipal (O69)
Petaluma Municipal sits at 90 ft, and even a typical September afternoon (82 °F) only lifts density altitude to about 1,578 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 | −584 ft | 57.6 | 37 ft |
| February | 50.8 | −416 ft | 61.3 | 280 ft |
| March | 53.2 | −255 ft | 64.5 | 489 ft |
| April | 55.8 | −82 ft | 67.8 | 702 ft |
| May | 59.6 | 169 ft | 71.9 | 965 ft |
| June | 64.3 | 476 ft | 78.1 | 1,358 ft |
| July | 66.6 | 625 ft | 80.8 | 1,528 ft |
| August | 67.0 | 651 ft | 81.2 | 1,553 ft |
| September | 66.5 | 619 ft | 81.6 | 1,578 ft |
| October | 62.0 | 326 ft | 76.4 | 1,251 ft |
| November | 53.9 | −208 ft | 65.5 | 554 ft |
| December | 48.1 | −597 ft | 57.9 | 57 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 O69
DENSITY ALTITUDE
Field elevation 90 ft — the air behaves like 1,603 ft.
- PRESSURE ALT
- 91 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
- KDVO — Gnoss Field
Novato · elev 4 ft
- 0Q3 — Sonoma Valley
Schellville/Sonoma · elev 16 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
- 2O3 — Angwin-Parrett Field
Angwin · elev 1,875 ft
- KHES — Healdsburg Municipal
Healdsburg · elev 280 ft
- KCCR — Buchanan Field
Concord · elev 26 ft
Frequently asked questions
How high does density altitude get at O69 in summer?
On a typical September afternoon — around 82 °F at the nearest NOAA normals station — density altitude at Petaluma Municipal reaches roughly 1,578 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 O69 on an average day?
It swings with the seasons: from roughly −597 ft at the coldest month's average temperature to about 651 ft at the warmest month's — all from a constant field elevation of 90 ft. The month-by-month table above carries the full year.
What is the field elevation of Petaluma Municipal?
90 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is O69 (FAA), in Petaluma, California.