Hayden, Colorado · field elev 6,606 ft
Density Altitude at Yampa Valley (KHDN)
Yampa Valley is a genuine high-and-hot field: from 6,606 ft of elevation, a typical July afternoon (86 °F) pushes density altitude to about 9,748 ft — the airplane performs like it is 3,142 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 | 19.1 | 5,527 ft | 30.1 | 6,271 ft ▲ |
| February | 23.5 | 5,827 ft | 35.0 | 6,596 ft ▲ |
| March | 34.2 | 6,543 ft | 47.2 | 7,388 ft ▲ |
| April | 43.5 | 7,151 ft | 58.2 | 8,083 ft ⚠ |
| May | 52.5 | 7,725 ft | 68.5 | 8,717 ft ⚠ |
| June | 61.2 | 8,269 ft | 79.4 | 9,371 ft ⚠ |
| July | 67.8 | 8,674 ft | 85.8 | 9,748 ft ⚠ |
| August | 66.0 | 8,564 ft | 83.5 | 9,613 ft ⚠ |
| September | 57.9 | 8,064 ft | 75.3 | 9,127 ft ⚠ |
| October | 45.7 | 7,292 ft | 61.6 | 8,294 ft ⚠ |
| November | 32.5 | 6,431 ft | 45.4 | 7,273 ft ▲ |
| December | 20.4 | 5,616 ft | 31.3 | 6,351 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 KHDN
DENSITY ALTITUDE high DA
Field elevation 6,606 ft — the air behaves like 9,759 ft.
- PRESSURE ALT
- 6,608 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 Colorado fields
- KCAG — Craig-Moffat
Craig · elev 6,198 ft
- KSBS — Steamboat Springs/Bob Adams Field
Steamboat Springs · elev 6,882 ft
- KEEO — Meeker Coulter Field
Meeker · elev 6,415 ft
- 33V — Walden-Jackson County
Walden · elev 8,154 ft
- 20V — Mc Elroy Airfield
Kremmling · elev 7,416 ft
- KEGE — Eagle County Regional
Eagle · elev 6,547 ft
- KGWS — Kgws Sumers Airpark
Glenwood Springs · elev 5,916 ft
- KRIL — Rifle Garfield County
Rifle · elev 5,537 ft
Frequently asked questions
How high does density altitude get at KHDN in summer?
On a typical July afternoon — around 86 °F at the nearest NOAA normals station — density altitude at Yampa Valley reaches roughly 9,748 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 KHDN on an average day?
It swings with the seasons: from roughly 5,527 ft at the coldest month's average temperature to about 8,674 ft at the warmest month's — all from a constant field elevation of 6,606 ft. The month-by-month table above carries the full year.
What is the field elevation of Yampa Valley?
6,606 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KHDN (ICAO) / HDN (FAA), in Hayden, Colorado.