Fort Bidwell, California · field elev 4,616 ft
Density Altitude at Fort Bidwell (A28)
From a field elevation of 4,616 ft, a typical July afternoon at Fort Bidwell (86 °F) raises density altitude to about 7,341 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 | 31.6 | 3,905 ft | 39.8 | 4,454 ft |
| February | 34.9 | 4,127 ft | 44.3 | 4,751 ft |
| March | 40.4 | 4,494 ft | 50.9 | 5,180 ft ▲ |
| April | 45.2 | 4,810 ft | 57.2 | 5,583 ft ▲ |
| May | 53.3 | 5,334 ft | 66.4 | 6,162 ft ▲ |
| June | 60.6 | 5,799 ft | 75.1 | 6,697 ft ▲ |
| July | 69.6 | 6,360 ft | 85.8 | 7,341 ft ▲ |
| August | 68.0 | 6,261 ft | 84.6 | 7,270 ft ▲ |
| September | 60.9 | 5,818 ft | 77.0 | 6,813 ft ▲ |
| October | 49.9 | 5,115 ft | 63.9 | 6,006 ft ▲ |
| November | 38.4 | 4,361 ft | 48.4 | 5,018 ft ▲ |
| December | 30.3 | 3,817 ft | 38.2 | 4,348 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 A28
DENSITY ALTITUDE caution
Field elevation 4,616 ft — the air behaves like 7,353 ft.
- PRESSURE ALT
- 4,618 ft
- ISA DEVIATION
- —
- RULE-OF-THUMB DA
- —
- AIR DENSITY INDEX
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- AIR DENSITY
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- 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
- O59 — Cedarville
Cedarville · elev 4,623 ft
- KAAT — Alturas Municipal
Alturas · elev 4,378 ft
- A24 — California Pines
Alturas · elev 4,389 ft
- O81 — Tulelake Municipal
Tulelake · elev 4,049 ft
- A26 — Adin
Adin · elev 4,234 ft
- O55 — Southard Field
Bieber · elev 4,163 ft
- O39 — Ravendale
Ravendale · elev 5,306 ft
- O89 — Fall River Mills
Fall River Mills · elev 3,328 ft
Frequently asked questions
How high does density altitude get at A28 in summer?
On a typical July afternoon — around 86 °F at the nearest NOAA normals station — density altitude at Fort Bidwell reaches roughly 7,341 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 A28 on an average day?
It swings with the seasons: from roughly 3,817 ft at the coldest month's average temperature to about 6,360 ft at the warmest month's — all from a constant field elevation of 4,616 ft. The month-by-month table above carries the full year.
What is the field elevation of Fort Bidwell?
4,616 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is A28 (FAA), in Fort Bidwell, California.