Thermopolis, Wyoming · field elev 4,892 ft
Density Altitude at Hot Springs County (KHSG)
From a field elevation of 4,892 ft, a typical July afternoon at Hot Springs County (91 °F) raises density altitude to about 7,953 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 | 17.5 | 3,278 ft | 29.7 | 4,119 ft |
| February | 24.0 | 3,729 ft | 37.2 | 4,623 ft |
| March | 36.8 | 4,596 ft | 50.4 | 5,487 ft ▲ |
| April | 45.7 | 5,183 ft | 58.7 | 6,017 ft ▲ |
| May | 55.7 | 5,827 ft | 68.7 | 6,641 ft ▲ |
| June | 66.3 | 6,493 ft | 80.8 | 7,377 ft ▲ |
| July | 75.1 | 7,033 ft | 90.5 | 7,953 ft ▲ |
| August | 73.0 | 6,905 ft | 88.5 | 7,835 ft ▲ |
| September | 61.8 | 6,212 ft | 76.5 | 7,118 ft ▲ |
| October | 47.5 | 5,300 ft | 60.4 | 6,124 ft ▲ |
| November | 33.2 | 4,355 ft | 44.4 | 5,098 ft ▲ |
| December | 20.1 | 3,460 ft | 31.3 | 4,227 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 KHSG
DENSITY ALTITUDE caution
Field elevation 4,892 ft — the air behaves like 7,982 ft.
- PRESSURE ALT
- 4,894 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 Wyoming fields
- KWRL — Worland Municipal
Worland · elev 4,252 ft
- 49U — Shoshoni Municipal
Shoshoni · elev 4,818 ft
- KRIW — Central Wyoming Regional
Riverton · elev 5,516 ft
- KGEY — South Big Horn County
Greybull · elev 3,942 ft
- KCOD — Yellowstone Regional
Cody · elev 5,102 ft
- KLND — Hunt Field
Lander · elev 5,589 ft
- KDUB — Dubois Municipal
Dubois · elev 7,299 ft
- KPOY — Powell Municipal
Powell · elev 5,096 ft
Frequently asked questions
How high does density altitude get at KHSG in summer?
On a typical July afternoon — around 91 °F at the nearest NOAA normals station — density altitude at Hot Springs County reaches roughly 7,953 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 KHSG on an average day?
It swings with the seasons: from roughly 3,278 ft at the coldest month's average temperature to about 7,033 ft at the warmest month's — all from a constant field elevation of 4,892 ft. The month-by-month table above carries the full year.
What is the field elevation of Hot Springs County?
4,892 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KHSG (ICAO) / HSG (FAA), in Thermopolis, Wyoming.