Hudson, Colorado · field elev 4,965 ft
Density Altitude at Platte Valley Airpark (18V)
Platte Valley Airpark is a genuine high-and-hot field: from 4,965 ft of elevation, a typical July afternoon (90 °F) pushes density altitude to about 8,012 ft — the airplane performs like it is 3,047 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 | 30.2 | 4,243 ft | 44.4 | 5,188 ft ▲ |
| February | 32.2 | 4,378 ft | 45.9 | 5,286 ft ▲ |
| March | 41.3 | 4,984 ft | 55.9 | 5,929 ft ▲ |
| April | 48.4 | 5,448 ft | 62.9 | 6,370 ft ▲ |
| May | 57.5 | 6,030 ft | 71.9 | 6,927 ft ▲ |
| June | 68.3 | 6,706 ft | 84.1 | 7,663 ft ▲ |
| July | 74.1 | 7,061 ft | 90.0 | 8,012 ft ⚠ |
| August | 72.0 | 6,933 ft | 87.6 | 7,871 ft ▲ |
| September | 63.6 | 6,414 ft | 79.8 | 7,406 ft ▲ |
| October | 50.4 | 5,577 ft | 65.9 | 6,557 ft ▲ |
| November | 39.1 | 4,839 ft | 53.3 | 5,763 ft ▲ |
| December | 30.2 | 4,243 ft | 44.0 | 5,162 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 18V
DENSITY ALTITUDE high DA
Field elevation 4,965 ft — the air behaves like 8,012 ft.
- PRESSURE ALT
- 4,967 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
- 11V — Easton/Valley View
Greeley · elev 4,820 ft
- KDEN — Denver International
Denver · elev 5,434 ft
- KEIK — Erie Municipal
Erie · elev 5,119 ft
- KGXY — Greeley-Weld County
Greeley · elev 4,697 ft
- KCFO — Colorado Air And Space Port
Denver · elev 5,515 ft
- KLMO — Vance Brand
Longmont · elev 5,055 ft
- KBJC — Rocky Mountain Metro
Denver · elev 5,673 ft
- KBDU — Boulder Municipal
Boulder · elev 5,288 ft
Frequently asked questions
How high does density altitude get at 18V in summer?
On a typical July afternoon — around 90 °F at the nearest NOAA normals station — density altitude at Platte Valley Airpark reaches roughly 8,012 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 18V on an average day?
It swings with the seasons: from roughly 4,243 ft at the coldest month's average temperature to about 7,061 ft at the warmest month's — all from a constant field elevation of 4,965 ft. The month-by-month table above carries the full year.
What is the field elevation of Platte Valley Airpark?
4,965 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 18V (FAA), in Hudson, Colorado.