Sherman, Texas · field elev 746 ft
Density Altitude at Sherman Municipal (KSWI)
Sherman Municipal sits at 746 ft, and even a typical August afternoon (93 °F) only lifts density altitude to about 3,060 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 | 43.2 | −115 ft | 52.6 | 517 ft |
| February | 47.1 | 149 ft | 57.1 | 814 ft |
| March | 55.1 | 683 ft | 65.2 | 1,342 ft |
| April | 62.7 | 1,180 ft | 72.6 | 1,815 ft |
| May | 70.8 | 1,700 ft | 80.0 | 2,280 ft |
| June | 78.9 | 2,211 ft | 88.1 | 2,780 ft |
| July | 83.0 | 2,466 ft | 92.5 | 3,048 ft |
| August | 82.8 | 2,454 ft | 92.7 | 3,060 ft |
| September | 75.8 | 2,017 ft | 85.4 | 2,614 ft |
| October | 65.2 | 1,342 ft | 75.3 | 1,985 ft |
| November | 53.7 | 590 ft | 63.3 | 1,219 ft |
| December | 45.1 | 14 ft | 54.2 | 623 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 KSWI
DENSITY ALTITUDE
Field elevation 746 ft — the air behaves like 3,078 ft.
- PRESSURE ALT
- 747 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 Texas fields
- T47 — Finney Field
Howe · elev 833 ft
- KGYI — North Texas Regional/Perrin Field
Sherman/Denison · elev 749 ft
- X65 — Txaerosport Aerodrome
Dorchester · elev 855 ft
- T32 — Sudden Stop
Collinsville · elev 720 ft
- T80 — Bishop'S Landing
Celina · elev 750 ft
- 3T0 — Cedar Mills
Gordonville · elev 640 ft
- 9S1 — Four Winds
Celina · elev 790 ft
- T29 — Flying H Ranch
Whitesboro · elev 760 ft
Frequently asked questions
How high does density altitude get at KSWI in summer?
On a typical August afternoon — around 93 °F at the nearest NOAA normals station — density altitude at Sherman Municipal reaches roughly 3,060 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 KSWI on an average day?
It swings with the seasons: from roughly −115 ft at the coldest month's average temperature to about 2,466 ft at the warmest month's — all from a constant field elevation of 746 ft. The month-by-month table above carries the full year.
What is the field elevation of Sherman Municipal?
746 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KSWI (ICAO) / SWI (FAA), in Sherman, Texas.