Angwin, California · field elev 1,875 ft
Density Altitude at Angwin-Parrett Field (2O3)
Angwin-Parrett Field sits at 1,875 ft, and even a typical July afternoon (85 °F) only lifts density altitude to about 3,941 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 | 46.5 | 1,508 ft | 53.7 | 1,985 ft |
| February | 47.8 | 1,595 ft | 55.9 | 2,129 ft |
| March | 50.6 | 1,780 ft | 60.3 | 2,414 ft |
| April | 54.1 | 2,011 ft | 65.9 | 2,774 ft |
| May | 59.7 | 2,376 ft | 72.7 | 3,204 ft |
| June | 65.7 | 2,761 ft | 80.0 | 3,658 ft |
| July | 69.4 | 2,996 ft | 84.6 | 3,941 ft |
| August | 69.1 | 2,977 ft | 84.3 | 3,922 ft |
| September | 67.4 | 2,869 ft | 81.3 | 3,738 ft |
| October | 61.1 | 2,466 ft | 72.4 | 3,185 ft |
| November | 51.3 | 1,827 ft | 59.8 | 2,382 ft |
| December | 45.8 | 1,461 ft | 52.7 | 1,919 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 2O3
DENSITY ALTITUDE
Field elevation 1,875 ft — the air behaves like 3,965 ft.
- PRESSURE ALT
- 1,876 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
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Santa Rosa · elev 129 ft
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Sonoma · elev 29 ft
- O69 — Petaluma Municipal
Petaluma · elev 90 ft
- 0Q3 — Sonoma Valley
Schellville/Sonoma · elev 16 ft
- KHES — Healdsburg Municipal
Healdsburg · elev 280 ft
- KAPC — Napa County
Napa · elev 36 ft
- KVCB — Nut Tree
Vacaville · elev 117 ft
- KDVO — Gnoss Field
Novato · elev 4 ft
Frequently asked questions
How high does density altitude get at 2O3 in summer?
On a typical July afternoon — around 85 °F at the nearest NOAA normals station — density altitude at Angwin-Parrett Field reaches roughly 3,941 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 2O3 on an average day?
It swings with the seasons: from roughly 1,461 ft at the coldest month's average temperature to about 2,996 ft at the warmest month's — all from a constant field elevation of 1,875 ft. The month-by-month table above carries the full year.
What is the field elevation of Angwin-Parrett Field?
1,875 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 2O3 (FAA), in Angwin, California.