Crescent City, California · field elev 61 ft
Density Altitude at Jack Mc Namara Field (KCEC)
Jack Mc Namara Field sits at 61 ft, and even a typical September afternoon (65 °F) only lifts density altitude to about 453 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 | 49.0 | −573 ft | 56.2 | −91 ft |
| February | 49.3 | −552 ft | 56.2 | −91 ft |
| March | 49.3 | −552 ft | 55.8 | −118 ft |
| April | 50.8 | −452 ft | 57.2 | −25 ft |
| May | 53.3 | −284 ft | 59.3 | 113 ft |
| June | 55.5 | −138 ft | 61.6 | 264 ft |
| July | 57.3 | −19 ft | 63.0 | 356 ft |
| August | 58.5 | 61 ft | 64.2 | 434 ft |
| September | 57.3 | −19 ft | 64.5 | 453 ft |
| October | 54.8 | −184 ft | 62.3 | 310 ft |
| November | 51.1 | −431 ft | 58.2 | 41 ft |
| December | 48.3 | −620 ft | 55.2 | −158 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 KCEC
DENSITY ALTITUDE
Field elevation 61 ft — the air behaves like 486 ft.
- PRESSURE ALT
- 62 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
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- O21 — Hoopa
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- KEKA — Murray Field
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- A30 — Scott Valley
Fort Jones · elev 2,728 ft
Frequently asked questions
How high does density altitude get at KCEC in summer?
On a typical September afternoon — around 65 °F at the nearest NOAA normals station — density altitude at Jack Mc Namara Field reaches roughly 453 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 KCEC on an average day?
It swings with the seasons: from roughly −620 ft at the coldest month's average temperature to about 61 ft at the warmest month's — all from a constant field elevation of 61 ft. The month-by-month table above carries the full year.
What is the field elevation of Jack Mc Namara Field?
61 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KCEC (ICAO) / CEC (FAA), in Crescent City, California.