Collegedale, Tennessee · field elev 860 ft
Density Altitude at Collegedale Municipal (KFGU)
Collegedale Municipal sits at 860 ft, and even a typical July afternoon (91 °F) only lifts density altitude to about 3,065 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 | 41.7 | −75 ft | 51.0 | 552 ft |
| February | 45.6 | 189 ft | 55.6 | 856 ft |
| March | 53.2 | 698 ft | 64.1 | 1,411 ft |
| April | 61.7 | 1,256 ft | 73.6 | 2,018 ft |
| May | 70.0 | 1,789 ft | 81.0 | 2,481 ft |
| June | 77.4 | 2,257 ft | 87.6 | 2,888 ft |
| July | 80.7 | 2,463 ft | 90.5 | 3,065 ft |
| August | 80.0 | 2,419 ft | 89.8 | 3,022 ft |
| September | 73.9 | 2,037 ft | 84.3 | 2,685 ft |
| October | 62.7 | 1,320 ft | 74.1 | 2,049 ft |
| November | 51.2 | 565 ft | 62.0 | 1,275 ft |
| December | 44.3 | 101 ft | 53.2 | 698 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 KFGU
DENSITY ALTITUDE
Field elevation 860 ft — the air behaves like 3,095 ft.
- PRESSURE ALT
- 861 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 Tennessee fields
- KCHA — Lovell Field
Chattanooga · elev 683 ft
- KRZR — Cleveland Regional Jetport
Cleveland · elev 866 ft
- 2A0 — Mark Anton
Dayton · elev 718 ft
- KAPT — Marion County/Brown Field
Jasper · elev 641 ft
- KMMI — Mcminn County
Athens · elev 874 ft
- 1A3 — Martin Campbell Field
Copperhill · elev 1,789 ft
- KMNV — Monroe County
Madisonville · elev 1,031 ft
- KUOS — Franklin County
Sewanee · elev 1,953 ft
Frequently asked questions
How high does density altitude get at KFGU in summer?
On a typical July afternoon — around 91 °F at the nearest NOAA normals station — density altitude at Collegedale Municipal reaches roughly 3,065 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 KFGU on an average day?
It swings with the seasons: from roughly −75 ft at the coldest month's average temperature to about 2,463 ft at the warmest month's — all from a constant field elevation of 860 ft. The month-by-month table above carries the full year.
What is the field elevation of Collegedale Municipal?
860 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KFGU (ICAO) / FGU (FAA), in Collegedale, Tennessee.