Newcastle, Wyoming · field elev 4,178 ft
Density Altitude at Mondell Field (KECS)
From a field elevation of 4,178 ft, a typical July afternoon at Mondell Field (87 °F) raises density altitude to about 6,858 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 | 24.4 | 2,867 ft | 34.6 | 3,564 ft |
| February | 26.9 | 3,040 ft | 37.6 | 3,765 ft |
| March | 36.9 | 3,719 ft | 48.3 | 4,472 ft |
| April | 45.2 | 4,269 ft | 57.0 | 5,033 ft ▲ |
| May | 54.8 | 4,892 ft | 66.3 | 5,620 ft ▲ |
| June | 65.3 | 5,558 ft | 77.6 | 6,317 ft ▲ |
| July | 73.4 | 6,060 ft | 86.6 | 6,858 ft ▲ |
| August | 72.1 | 5,980 ft | 85.6 | 6,799 ft ▲ |
| September | 62.0 | 5,350 ft | 75.1 | 6,164 ft ▲ |
| October | 47.2 | 4,400 ft | 58.9 | 5,154 ft ▲ |
| November | 34.6 | 3,564 ft | 45.0 | 4,256 ft |
| December | 24.8 | 2,895 ft | 34.6 | 3,564 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 KECS
DENSITY ALTITUDE caution
Field elevation 4,178 ft — the air behaves like 6,882 ft.
- PRESSURE ALT
- 4,180 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 Wyoming fields
- 83V — Upton Municipal
Upton · elev 4,290 ft
- W43 — Hulett Municipal
Hulett · elev 4,264 ft
- KGCC — Northeast Wyoming Regional
Gillette · elev 4,365 ft
- KLSK — Lusk Municipal
Lusk · elev 4,967 ft
- KDGW — Converse County
Douglas · elev 4,933 ft
- 76V — Thomas Meml
Glendo · elev 4,666 ft
- KGUR — Camp Guernsey
Guernsey · elev 4,402 ft
- KHAD — Irwins Sky Ranch
Casper · elev 5,370 ft
Frequently asked questions
How high does density altitude get at KECS in summer?
On a typical July afternoon — around 87 °F at the nearest NOAA normals station — density altitude at Mondell Field reaches roughly 6,858 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 KECS on an average day?
It swings with the seasons: from roughly 2,867 ft at the coldest month's average temperature to about 6,060 ft at the warmest month's — all from a constant field elevation of 4,178 ft. The month-by-month table above carries the full year.
What is the field elevation of Mondell Field?
4,178 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KECS (ICAO) / ECS (FAA), in Newcastle, Wyoming.