Emmett, Idaho · field elev 2,354 ft
Density Altitude at Emmett Municipal (S78)
Emmett Municipal sits at 2,354 ft, and even a typical July afternoon (92 °F) only lifts density altitude to about 4,952 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 | 30.8 | 1,036 ft | 38.3 | 1,550 ft |
| February | 36.3 | 1,414 ft | 46.0 | 2,068 ft |
| March | 43.9 | 1,927 ft | 55.9 | 2,719 ft |
| April | 49.3 | 2,287 ft | 62.8 | 3,164 ft |
| May | 57.9 | 2,849 ft | 72.3 | 3,765 ft |
| June | 65.6 | 3,343 ft | 80.9 | 4,298 ft |
| July | 74.7 | 3,915 ft | 91.7 | 4,952 ft |
| August | 73.5 | 3,840 ft | 90.4 | 4,874 ft |
| September | 64.0 | 3,241 ft | 79.7 | 4,224 ft |
| October | 51.6 | 2,438 ft | 65.2 | 3,317 ft |
| November | 39.1 | 1,604 ft | 49.2 | 2,280 ft |
| December | 31.2 | 1,064 ft | 38.9 | 1,591 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 S78
DENSITY ALTITUDE
Field elevation 2,354 ft — the air behaves like 4,970 ft.
- PRESSURE ALT
- 2,355 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 Idaho fields
- KEUL — Caldwell Exec
Caldwell · elev 2,431 ft
- KMAN — Nampa Municipal
Nampa · elev 2,537 ft
- 50S — Parma
Parma · elev 2,228 ft
- S75 — Payette Municipal
Payette · elev 2,230 ft
- S66 — Homedale Municipal
Homedale · elev 2,220 ft
- KBOI — Boise Air Trml/Gowen Field
Boise · elev 2,872 ft
- S87 — Weiser Municipal
Weiser · elev 2,120 ft
- U88 — Garden Valley
Garden Valley · elev 3,177 ft
Frequently asked questions
How high does density altitude get at S78 in summer?
On a typical July afternoon — around 92 °F at the nearest NOAA normals station — density altitude at Emmett Municipal reaches roughly 4,952 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 S78 on an average day?
It swings with the seasons: from roughly 1,036 ft at the coldest month's average temperature to about 3,915 ft at the warmest month's — all from a constant field elevation of 2,354 ft. The month-by-month table above carries the full year.
What is the field elevation of Emmett Municipal?
2,354 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is S78 (FAA), in Emmett, Idaho.