Fallbrook, California · field elev 711 ft
Density Altitude at Fallbrook Community Airpark (L18)
Fallbrook Community Airpark sits at 711 ft, and even a typical August afternoon (81 °F) only lifts density altitude to about 2,281 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 | 55.7 | 679 ft | 65.6 | 1,324 ft |
| February | 55.6 | 672 ft | 65.4 | 1,312 ft |
| March | 57.5 | 797 ft | 66.7 | 1,395 ft |
| April | 59.9 | 955 ft | 69.4 | 1,568 ft |
| May | 63.1 | 1,163 ft | 71.0 | 1,670 ft |
| June | 66.5 | 1,382 ft | 74.5 | 1,892 ft |
| July | 70.5 | 1,638 ft | 78.9 | 2,168 ft |
| August | 71.9 | 1,727 ft | 80.7 | 2,281 ft |
| September | 70.8 | 1,658 ft | 80.5 | 2,268 ft |
| October | 66.1 | 1,357 ft | 76.0 | 1,987 ft |
| November | 60.4 | 987 ft | 71.1 | 1,677 ft |
| December | 54.9 | 626 ft | 64.8 | 1,273 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 L18
DENSITY ALTITUDE
Field elevation 711 ft — the air behaves like 2,299 ft.
- PRESSURE ALT
- 712 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
- KOKB — Bob Maxwell Meml Airfield
Oceanside · elev 28 ft
- KCRQ — Mc Clellan-Palomar
Carlsbad · elev 331 ft
- F70 — French Valley
Murrieta/Temecula · elev 1,350 ft
- L65 — Perris Valley
Perris · elev 1,413 ft
- KRNM — Ramona
Ramona · elev 1,395 ft
- KHMT — Hemet-Ryan
Hemet · elev 1,515 ft
- KRIV — March Arb
Riverside · elev 1,536 ft
- KMYF — Montgomery-Gibbs Exec
San Diego · elev 427 ft
Frequently asked questions
How high does density altitude get at L18 in summer?
On a typical August afternoon — around 81 °F at the nearest NOAA normals station — density altitude at Fallbrook Community Airpark reaches roughly 2,281 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 L18 on an average day?
It swings with the seasons: from roughly 626 ft at the coldest month's average temperature to about 1,727 ft at the warmest month's — all from a constant field elevation of 711 ft. The month-by-month table above carries the full year.
What is the field elevation of Fallbrook Community Airpark?
711 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is L18 (FAA), in Fallbrook, California.