Hesperia, California · field elev 3,390 ft
Density Altitude at Hesperia (L26)
From a field elevation of 3,390 ft, a typical August afternoon at Hesperia (97 °F) raises density altitude to about 6,520 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 | 48.4 | 3,507 ft | 60.2 | 4,270 ft |
| February | 50.4 | 3,638 ft | 61.9 | 4,378 ft |
| March | 55.4 | 3,962 ft | 69.1 | 4,832 ft |
| April | 60.4 | 4,283 ft | 75.0 | 5,198 ft ▲ |
| May | 67.4 | 4,725 ft | 82.3 | 5,644 ft ▲ |
| June | 75.5 | 5,229 ft | 91.8 | 6,213 ft ▲ |
| July | 80.9 | 5,559 ft | 96.8 | 6,508 ft ▲ |
| August | 81.0 | 5,565 ft | 97.0 | 6,520 ft ▲ |
| September | 76.2 | 5,272 ft | 91.4 | 6,189 ft ▲ |
| October | 65.9 | 4,631 ft | 80.5 | 5,534 ft ▲ |
| November | 54.6 | 3,910 ft | 67.4 | 4,725 ft |
| December | 47.1 | 3,421 ft | 59.0 | 4,193 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 L26
DENSITY ALTITUDE caution
Field elevation 3,390 ft — the air behaves like 6,520 ft.
- PRESSURE ALT
- 3,392 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
- KVCV — Southern California Logistics
Victorville · elev 2,885 ft
- KAPV — Apple Valley
Apple Valley · elev 3,062 ft
- KSBD — San Bernardino International
San Bernardino · elev 1,159 ft
- KREI — Redlands Municipal
Redlands · elev 1,574 ft
- KRIR — Flabob
Riverside/Rubidoux/ · elev 767 ft
- L35 — Big Bear City
Big Bear City · elev 6,752 ft
- KONT — Ontario International
Ontario · elev 944 ft
- KCCB — Cable
Upland · elev 1,444 ft
Frequently asked questions
How high does density altitude get at L26 in summer?
On a typical August afternoon — around 97 °F at the nearest NOAA normals station — density altitude at Hesperia reaches roughly 6,520 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 L26 on an average day?
It swings with the seasons: from roughly 3,421 ft at the coldest month's average temperature to about 5,565 ft at the warmest month's — all from a constant field elevation of 3,390 ft. The month-by-month table above carries the full year.
What is the field elevation of Hesperia?
3,390 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is L26 (FAA), in Hesperia, California.