Alamosa, Colorado · field elev 7,540 ft
Density Altitude at San Luis Valley Regional/Bergman Field (KALS)
San Luis Valley Regional/Bergman Field is a genuine high-and-hot field: from 7,540 ft of elevation, a typical July afternoon (83 °F) pushes density altitude to about 10,729 ft — the airplane performs like it is 3,189 ft above the field before the wheels roll.
Typical density altitude by month
| Month | Avg temp °F | DA at avg temp | Afternoon high °F | DA on a typical afternoon |
|---|---|---|---|---|
| January | 16.8 | 6,531 ft | 34.8 | 7,736 ft ▲ |
| February | 24.3 | 7,040 ft | 41.2 | 8,151 ft ⚠ |
| March | 35.2 | 7,762 ft | 52.7 | 8,881 ft ⚠ |
| April | 42.6 | 8,241 ft | 60.2 | 9,347 ft ⚠ |
| May | 51.7 | 8,819 ft | 69.8 | 9,930 ft ⚠ |
| June | 60.6 | 9,371 ft | 80.2 | 10,548 ft ⚠ |
| July | 65.3 | 9,658 ft | 83.3 | 10,729 ft ⚠ |
| August | 63.2 | 9,530 ft | 80.5 | 10,566 ft ⚠ |
| September | 55.9 | 9,081 ft | 74.4 | 10,205 ft ⚠ |
| October | 43.8 | 8,318 ft | 62.8 | 9,506 ft ⚠ |
| November | 30.3 | 7,440 ft | 48.5 | 8,617 ft ⚠ |
| December | 18.1 | 6,620 ft | 35.4 | 7,775 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 KALS
DENSITY ALTITUDE high DA
Field elevation 7,540 ft — the air behaves like 10,712 ft.
- PRESSURE ALT
- 7,542 ft
- ISA DEVIATION
- —
- RULE-OF-THUMB DA
- —
- AIR DENSITY INDEX
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- 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 Colorado fields
- KMVI — Monte Vista Municipal
Monte Vista · elev 7,611 ft
- 05V — Blanca
Blanca · elev 7,720 ft
- 1V8 — Leach
Center · elev 7,598 ft
- KRCV — Astronaut Kent Rominger
Del Norte · elev 7,955 ft
- 07V — Cuchara Valley At La Veta
La Veta · elev 7,153 ft
- C08 — Silver West
Westcliffe · elev 8,290 ft
- 04V — Saguache Municipal
Saguache · elev 7,850 ft
- 4V1 — Spanish Peaks Airfield
Walsenburg · elev 6,055 ft
Frequently asked questions
How high does density altitude get at KALS in summer?
On a typical July afternoon — around 83 °F at the nearest NOAA normals station — density altitude at San Luis Valley Regional/Bergman Field reaches roughly 10,729 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 KALS on an average day?
It swings with the seasons: from roughly 6,531 ft at the coldest month's average temperature to about 9,658 ft at the warmest month's — all from a constant field elevation of 7,540 ft. The month-by-month table above carries the full year.
What is the field elevation of San Luis Valley Regional/Bergman Field?
7,540 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KALS (ICAO) / ALS (FAA), in Alamosa, Colorado.