St Francis, Kansas · field elev 3,430 ft
Density Altitude at Cheyenne County Municipal (KSYF)
From a field elevation of 3,430 ft, a typical July afternoon at Cheyenne County Municipal (92 °F) raises density altitude to about 6,256 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 | 29.4 | 2,280 ft | 43.4 | 3,226 ft |
| February | 31.8 | 2,445 ft | 46.1 | 3,405 ft |
| March | 41.4 | 3,093 ft | 56.5 | 4,082 ft |
| April | 49.6 | 3,635 ft | 64.5 | 4,592 ft |
| May | 60.0 | 4,306 ft | 74.1 | 5,191 ft ▲ |
| June | 71.6 | 5,036 ft | 86.2 | 5,927 ft ▲ |
| July | 77.1 | 5,376 ft | 91.7 | 6,256 ft ▲ |
| August | 74.8 | 5,234 ft | 89.3 | 6,113 ft ▲ |
| September | 65.9 | 4,680 ft | 81.5 | 5,644 ft ▲ |
| October | 51.9 | 3,785 ft | 67.9 | 4,806 ft |
| November | 39.4 | 2,959 ft | 54.5 | 3,953 ft |
| December | 30.4 | 2,349 ft | 44.5 | 3,299 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 KSYF
DENSITY ALTITUDE caution
Field elevation 3,430 ft — the air behaves like 6,273 ft.
- PRESSURE ALT
- 3,432 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 Kansas fields
- 5K0 — Bressler Field
Bird City · elev 3,489 ft
- KGLD — Renner Field/Goodland Municipal
Goodland · elev 3,658 ft
- KADT — Atwood/Rawlins County
Atwood · elev 2,991 ft
- KCBK — Shalz Field
Colby · elev 3,188 ft
- KOIN — Oberlin Municipal
Oberlin · elev 2,707 ft
- KOEL — Oakley Municipal
Oakley · elev 3,045 ft
- 1F5 — Hoxie-Sheridan County
Hoxie · elev 2,733 ft
- 5K2 — Tribune Municipal
Tribune · elev 3,610 ft
Frequently asked questions
How high does density altitude get at KSYF in summer?
On a typical July afternoon — around 92 °F at the nearest NOAA normals station — density altitude at Cheyenne County Municipal reaches roughly 6,256 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 KSYF on an average day?
It swings with the seasons: from roughly 2,280 ft at the coldest month's average temperature to about 5,376 ft at the warmest month's — all from a constant field elevation of 3,430 ft. The month-by-month table above carries the full year.
What is the field elevation of Cheyenne County Municipal?
3,430 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KSYF (ICAO) / SYF (FAA), in St Francis, Kansas.