Condon, Montana · field elev 3,686 ft
Density Altitude at Condon Usfs (S04)
From a field elevation of 3,686 ft, a typical July afternoon at Condon Usfs (78 °F) raises density altitude to about 5,755 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 | 23.5 | 2,191 ft | 30.6 | 2,681 ft |
| February | 25.3 | 2,316 ft | 34.0 | 2,913 ft |
| March | 32.8 | 2,831 ft | 42.2 | 3,463 ft |
| April | 39.7 | 3,296 ft | 49.9 | 3,970 ft |
| May | 49.2 | 3,924 ft | 60.4 | 4,646 ft |
| June | 56.1 | 4,371 ft | 67.6 | 5,100 ft ▲ |
| July | 64.3 | 4,893 ft | 78.2 | 5,755 ft ▲ |
| August | 63.3 | 4,830 ft | 77.9 | 5,736 ft ▲ |
| September | 54.3 | 4,255 ft | 67.3 | 5,081 ft ▲ |
| October | 41.9 | 3,443 ft | 51.5 | 4,074 ft |
| November | 30.6 | 2,681 ft | 37.5 | 3,149 ft |
| December | 22.7 | 2,135 ft | 29.0 | 2,571 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 S04
DENSITY ALTITUDE caution
Field elevation 3,686 ft — the air behaves like 5,742 ft.
- PRESSURE ALT
- 3,688 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
- 7S0 — Ronan
Ronan · elev 3,086 ft
- 52S — St Ignatius
St Ignatius · elev 3,006 ft
- 8S1 — Polson
Polson · elev 2,941 ft
- 0S1 — Meadow Creek Usfs
Meadow Creek · elev 3,993 ft
- 23S — Seeley Lake
Seeley Lake · elev 4,256 ft
- 8U4 — Spotted Bear /Usfs/
Spotted Bear · elev 3,672 ft
- 53U — Ferndale Airfield
Bigfork · elev 3,072 ft
- 3U7 — Benchmark
Augusta · elev 5,434 ft
Frequently asked questions
How high does density altitude get at S04 in summer?
On a typical July afternoon — around 78 °F at the nearest NOAA normals station — density altitude at Condon Usfs reaches roughly 5,755 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 S04 on an average day?
It swings with the seasons: from roughly 2,135 ft at the coldest month's average temperature to about 4,893 ft at the warmest month's — all from a constant field elevation of 3,686 ft. The month-by-month table above carries the full year.
What is the field elevation of Condon Usfs?
3,686 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is S04 (FAA), in Condon, Montana.