Perris, California · field elev 1,413 ft
Density Altitude at Perris Valley (L65)
Perris Valley sits at 1,413 ft, and even a typical August afternoon (98 °F) only lifts density altitude to about 4,175 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 | 53.8 | 1,421 ft | 65.7 | 2,194 ft |
| February | 54.9 | 1,493 ft | 67.1 | 2,283 ft |
| March | 58.7 | 1,742 ft | 71.5 | 2,563 ft |
| April | 62.6 | 1,995 ft | 76.5 | 2,877 ft |
| May | 67.9 | 2,334 ft | 82.0 | 3,218 ft |
| June | 74.3 | 2,739 ft | 90.2 | 3,719 ft |
| July | 80.3 | 3,113 ft | 96.5 | 4,098 ft |
| August | 81.3 | 3,175 ft | 97.8 | 4,175 ft |
| September | 77.2 | 2,920 ft | 93.2 | 3,900 ft |
| October | 68.5 | 2,372 ft | 83.1 | 3,286 ft |
| November | 59.6 | 1,800 ft | 73.2 | 2,670 ft |
| December | 52.6 | 1,342 ft | 65.0 | 2,149 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 L65
DENSITY ALTITUDE
Field elevation 1,413 ft — the air behaves like 4,187 ft.
- PRESSURE ALT
- 1,414 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
- KRIV — March Arb
Riverside · elev 1,536 ft
- KHMT — Hemet-Ryan
Hemet · elev 1,515 ft
- F70 — French Valley
Murrieta/Temecula · elev 1,350 ft
- KRAL — Riverside
Riverside · elev 819 ft
- KRIR — Flabob
Riverside/Rubidoux/ · elev 767 ft
- KREI — Redlands Municipal
Redlands · elev 1,574 ft
- KSBD — San Bernardino International
San Bernardino · elev 1,159 ft
- KBNG — Banning Municipal
Banning · elev 2,222 ft
Frequently asked questions
How high does density altitude get at L65 in summer?
On a typical August afternoon — around 98 °F at the nearest NOAA normals station — density altitude at Perris Valley reaches roughly 4,175 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 L65 on an average day?
It swings with the seasons: from roughly 1,342 ft at the coldest month's average temperature to about 3,175 ft at the warmest month's — all from a constant field elevation of 1,413 ft. The month-by-month table above carries the full year.
What is the field elevation of Perris Valley?
1,413 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is L65 (FAA), in Perris, California.