Gwinner, North Dakota · field elev 1,266 ft
Density Altitude at Gwinner/Roger Melroe Field (KGWR)
Gwinner/Roger Melroe Field sits at 1,266 ft, and even a typical July afternoon (81 °F) only lifts density altitude to about 2,977 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 | 8.9 | −1,894 ft | 18.3 | −1,208 ft |
| February | 13.3 | −1,571 ft | 23.2 | −857 ft |
| March | 26.5 | −623 ft | 36.5 | 74 ft |
| April | 41.8 | 436 ft | 52.9 | 1,180 ft |
| May | 55.2 | 1,331 ft | 66.4 | 2,058 ft |
| June | 65.4 | 1,994 ft | 75.9 | 2,659 ft |
| July | 70.2 | 2,300 ft | 81.0 | 2,977 ft |
| August | 68.1 | 2,167 ft | 79.7 | 2,896 ft |
| September | 59.1 | 1,587 ft | 71.4 | 2,376 ft |
| October | 44.6 | 626 ft | 55.7 | 1,364 ft |
| November | 29.0 | −447 ft | 38.4 | 204 ft |
| December | 15.8 | −1,389 ft | 24.6 | −757 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 KGWR
DENSITY ALTITUDE
Field elevation 1,266 ft — the air behaves like 2,977 ft.
- PRESSURE ALT
- 1,267 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
- 4R6 — Milnor Municipal
Milnor · elev 1,091 ft
- 6L3 — Lisbon Municipal
Lisbon · elev 1,240 ft
- 2D5 — Oakes Municipal
Oakes · elev 1,335 ft
- 4N4 — Lidgerwood Municipal
Lidgerwood · elev 1,082 ft
- 5N4 — Sky Haven
Enderlin · elev 1,151 ft
- 4F9 — La Moure Rott Municipal
La Moure · elev 1,310 ft
- K74 — Robert Odegaard Field
Kindred · elev 947 ft
- 4E7 — Ellendale Municipal
Ellendale · elev 1,457 ft
Frequently asked questions
How high does density altitude get at KGWR in summer?
On a typical July afternoon — around 81 °F at the nearest NOAA normals station — density altitude at Gwinner/Roger Melroe Field reaches roughly 2,977 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 KGWR on an average day?
It swings with the seasons: from roughly −1,894 ft at the coldest month's average temperature to about 2,300 ft at the warmest month's — all from a constant field elevation of 1,266 ft. The month-by-month table above carries the full year.
What is the field elevation of Gwinner/Roger Melroe Field?
1,266 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KGWR (ICAO) / GWR (FAA), in Gwinner, North Dakota.