Chester, Montana · field elev 3,185 ft
Density Altitude at Liberty County (KLTY)
From a field elevation of 3,185 ft, a typical July afternoon at Liberty County (83 °F) raises density altitude to about 5,407 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 | 15.7 | 1,014 ft | 28.7 | 1,927 ft |
| February | 19.6 | 1,291 ft | 33.0 | 2,222 ft |
| March | 30.4 | 2,044 ft | 44.1 | 2,969 ft |
| April | 41.5 | 2,796 ft | 55.5 | 3,716 ft |
| May | 52.0 | 3,489 ft | 65.8 | 4,374 ft |
| June | 59.5 | 3,974 ft | 72.7 | 4,805 ft |
| July | 67.1 | 4,456 ft | 82.5 | 5,407 ft ▲ |
| August | 65.8 | 4,374 ft | 82.0 | 5,376 ft ▲ |
| September | 55.7 | 3,729 ft | 71.0 | 4,700 ft |
| October | 42.1 | 2,836 ft | 56.8 | 3,800 ft |
| November | 28.2 | 1,892 ft | 41.1 | 2,769 ft |
| December | 18.6 | 1,221 ft | 31.6 | 2,126 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 KLTY
DENSITY ALTITUDE caution
Field elevation 3,185 ft — the air behaves like 5,437 ft.
- PRESSURE ALT
- 3,187 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 Montana fields
- B70 — Tiber Dam
Tiber Dam · elev 3,023 ft
- KSBX — Shelby
Shelby · elev 3,443 ft
- 3U8 — Big Sandy
Big Sandy · elev 2,699 ft
- 79S — Fort Benton
Fort Benton · elev 2,869 ft
- S01 — Conrad
Conrad · elev 3,548 ft
- 5U1 — Dutton
Dutton · elev 3,699 ft
- KHVR — Havre City-County
Havre · elev 2,591 ft
- 7S8 — Ross International
Sweetgrass · elev 3,553 ft
Frequently asked questions
How high does density altitude get at KLTY in summer?
On a typical July afternoon — around 83 °F at the nearest NOAA normals station — density altitude at Liberty County reaches roughly 5,407 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 KLTY on an average day?
It swings with the seasons: from roughly 1,014 ft at the coldest month's average temperature to about 4,456 ft at the warmest month's — all from a constant field elevation of 3,185 ft. The month-by-month table above carries the full year.
What is the field elevation of Liberty County?
3,185 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KLTY (ICAO) / LTY (FAA), in Chester, Montana.