Roseburg, Oregon · field elev 428 ft
Density Altitude at George Felt (5S1)
George Felt sits at 428 ft, and even a typical August afternoon (89 °F) only lifts density altitude to about 2,417 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 | 43.5 | −490 ft | 50.6 | −10 ft |
| February | 45.9 | −327 ft | 55.1 | 290 ft |
| March | 49.3 | −97 ft | 60.3 | 632 ft |
| April | 53.4 | 177 ft | 65.2 | 950 ft |
| May | 60.1 | 619 ft | 73.1 | 1,457 ft |
| June | 65.5 | 970 ft | 79.1 | 1,835 ft |
| July | 72.3 | 1,406 ft | 88.1 | 2,392 ft |
| August | 72.1 | 1,393 ft | 88.5 | 2,417 ft |
| September | 66.6 | 1,041 ft | 82.7 | 2,059 ft |
| October | 56.7 | 395 ft | 69.1 | 1,201 ft |
| November | 48.4 | −158 ft | 56.2 | 362 ft |
| December | 42.9 | −531 ft | 49.2 | −104 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 5S1
DENSITY ALTITUDE
Field elevation 428 ft — the air behaves like 2,448 ft.
- PRESSURE ALT
- 429 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 Oregon fields
- KRBG — Roseburg Regional
Roseburg · elev 533 ft
- 16S — Myrtle Creek Municipal
Myrtle Creek · elev 619 ft
- 6S6 — Powers
Powers · elev 326 ft
- KOTH — Southwest Oregon Regional
North Bend · elev 17 ft
- 61S — Cottage Grove State
Cottage Grove · elev 645 ft
- 9S3 — Lakeside Municipal
Lakeside · elev 20 ft
- 3S8 — Grants Pass
Grants Pass · elev 1,130 ft
- 3S6 — Toketee State
Clearwater · elev 3,361 ft
Frequently asked questions
How high does density altitude get at 5S1 in summer?
On a typical August afternoon — around 89 °F at the nearest NOAA normals station — density altitude at George Felt reaches roughly 2,417 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 5S1 on an average day?
It swings with the seasons: from roughly −531 ft at the coldest month's average temperature to about 1,406 ft at the warmest month's — all from a constant field elevation of 428 ft. The month-by-month table above carries the full year.
What is the field elevation of George Felt?
428 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 5S1 (FAA), in Roseburg, Oregon.