Grafton, North Dakota · field elev 825 ft
Density Altitude at Hutson Field (KGAF)
Hutson Field sits at 825 ft, and even a typical July afternoon (81 °F) only lifts density altitude to about 2,457 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 | 7.7 | −2,540 ft | 15.5 | −1,965 ft |
| February | 12.6 | −2,178 ft | 21.0 | −1,567 ft |
| March | 26.4 | −1,182 ft | 34.4 | −621 ft |
| April | 42.8 | −44 ft | 52.5 | 608 ft |
| May | 57.3 | 925 ft | 68.4 | 1,644 ft |
| June | 68.0 | 1,619 ft | 78.7 | 2,295 ft |
| July | 71.3 | 1,829 ft | 81.3 | 2,457 ft |
| August | 69.6 | 1,721 ft | 80.2 | 2,389 ft |
| September | 60.6 | 1,141 ft | 71.3 | 1,829 ft |
| October | 45.1 | 112 ft | 53.9 | 701 ft |
| November | 28.7 | −1,020 ft | 35.8 | −524 ft |
| December | 14.0 | −2,075 ft | 21.0 | −1,567 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 KGAF
DENSITY ALTITUDE
Field elevation 825 ft — the air behaves like 2,439 ft.
- PRESSURE ALT
- 826 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 North Dakota fields
- D06 — Minto Municipal
Minto · elev 820 ft
- 4S5 — St Thomas Municipal
St Thomas · elev 839 ft
- D29 — Drayton Municipal
Drayton · elev 798 ft
- Y37 — Park River - W C Skjerven Field
Park River · elev 1,104 ft
- 2C8 — Cavalier Municipal
Cavalier · elev 892 ft
- KGFK — Grand Forks International
Grand Forks · elev 845 ft
- 2L1 — Larimore Municipal
Larimore · elev 1,130 ft
- KPMB — Pembina Municipal
Pembina · elev 796 ft
Frequently asked questions
How high does density altitude get at KGAF in summer?
On a typical July afternoon — around 81 °F at the nearest NOAA normals station — density altitude at Hutson Field reaches roughly 2,457 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 KGAF on an average day?
It swings with the seasons: from roughly −2,540 ft at the coldest month's average temperature to about 1,829 ft at the warmest month's — all from a constant field elevation of 825 ft. The month-by-month table above carries the full year.
What is the field elevation of Hutson Field?
825 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KGAF (ICAO) / GAF (FAA), in Grafton, North Dakota.