Sonoma, California · field elev 29 ft
Density Altitude at Sonoma Skypark (0Q9)
Sonoma Skypark sits at 29 ft, and even a typical August afternoon (86 °F) only lifts density altitude to about 1,783 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 | 47.7 | −700 ft | 57.0 | −78 ft |
| February | 50.8 | −491 ft | 61.6 | 225 ft |
| March | 53.7 | −297 ft | 65.4 | 472 ft |
| April | 56.7 | −98 ft | 69.2 | 718 ft |
| May | 61.6 | 225 ft | 75.3 | 1,107 ft |
| June | 67.1 | 582 ft | 82.8 | 1,578 ft |
| July | 69.7 | 750 ft | 86.0 | 1,777 ft |
| August | 69.6 | 743 ft | 86.1 | 1,783 ft |
| September | 68.0 | 640 ft | 84.8 | 1,702 ft |
| October | 62.5 | 283 ft | 77.5 | 1,246 ft |
| November | 53.5 | −310 ft | 65.2 | 459 ft |
| December | 47.4 | −720 ft | 56.7 | −98 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 0Q9
DENSITY ALTITUDE
Field elevation 29 ft — the air behaves like 1,777 ft.
- PRESSURE ALT
- 30 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
- KAPC — Napa County
Napa · elev 36 ft
- O69 — Petaluma Municipal
Petaluma · elev 90 ft
- KDVO — Gnoss Field
Novato · elev 4 ft
- 2O3 — Angwin-Parrett Field
Angwin · elev 1,875 ft
- KSTS — Charles M Schulz/Sonoma County
Santa Rosa · elev 129 ft
- KVCB — Nut Tree
Vacaville · elev 117 ft
- KCCR — Buchanan Field
Concord · elev 26 ft
Frequently asked questions
How high does density altitude get at 0Q9 in summer?
On a typical August afternoon — around 86 °F at the nearest NOAA normals station — density altitude at Sonoma Skypark reaches roughly 1,783 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 0Q9 on an average day?
It swings with the seasons: from roughly −720 ft at the coldest month's average temperature to about 750 ft at the warmest month's — all from a constant field elevation of 29 ft. The month-by-month table above carries the full year.
What is the field elevation of Sonoma Skypark?
29 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 0Q9 (FAA), in Sonoma, California.