Hot Springs, Montana · field elev 2,763 ft
Density Altitude at Hot Springs (S09)
Hot Springs sits at 2,763 ft, and even a typical July afternoon (83 °F) only lifts density altitude to about 4,924 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 | 26.3 | 1,234 ft | 32.2 | 1,642 ft |
| February | 28.9 | 1,415 ft | 36.8 | 1,956 ft |
| March | 36.5 | 1,936 ft | 46.8 | 2,627 ft |
| April | 44.2 | 2,454 ft | 55.9 | 3,223 ft |
| May | 52.5 | 3,002 ft | 65.2 | 3,819 ft |
| June | 58.8 | 3,410 ft | 71.4 | 4,209 ft |
| July | 67.4 | 3,958 ft | 83.0 | 4,924 ft |
| August | 67.0 | 3,933 ft | 82.9 | 4,918 ft |
| September | 57.2 | 3,307 ft | 71.4 | 4,209 ft |
| October | 44.3 | 2,461 ft | 54.9 | 3,158 ft |
| November | 32.9 | 1,690 ft | 39.8 | 2,159 ft |
| December | 26.5 | 1,248 ft | 31.9 | 1,622 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 S09
DENSITY ALTITUDE
Field elevation 2,763 ft — the air behaves like 4,924 ft.
- PRESSURE ALT
- 2,765 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
- S34 — Plains
Plains · elev 2,467 ft
- 8S1 — Polson
Polson · elev 2,941 ft
- 7S0 — Ronan
Ronan · elev 3,086 ft
- KTHM — Thompson Falls
Thompson Falls · elev 2,467 ft
- 52S — St Ignatius
St Ignatius · elev 3,006 ft
- 9S4 — Mineral County
Superior · elev 2,787 ft
- S27 — Kalispell City
Kalispell · elev 2,932 ft
- S04 — Condon Usfs
Condon · elev 3,686 ft
Frequently asked questions
How high does density altitude get at S09 in summer?
On a typical July afternoon — around 83 °F at the nearest NOAA normals station — density altitude at Hot Springs reaches roughly 4,924 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 S09 on an average day?
It swings with the seasons: from roughly 1,234 ft at the coldest month's average temperature to about 3,958 ft at the warmest month's — all from a constant field elevation of 2,763 ft. The month-by-month table above carries the full year.
What is the field elevation of Hot Springs?
2,763 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is S09 (FAA), in Hot Springs, Montana.