Big Rapids, Michigan · field elev 994 ft
Density Altitude at Roben-Hood (KRQB)
Roben-Hood sits at 994 ft, and even a typical July afternoon (81 °F) only lifts density altitude to about 2,664 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 | 20.4 | −1,398 ft | 28.2 | −844 ft |
| February | 21.8 | −1,298 ft | 31.4 | −619 ft |
| March | 30.9 | −654 ft | 42.0 | 112 ft |
| April | 42.9 | 173 ft | 54.8 | 969 ft |
| May | 55.4 | 1,009 ft | 67.6 | 1,801 ft |
| June | 65.1 | 1,640 ft | 77.2 | 2,408 ft |
| July | 69.2 | 1,903 ft | 81.3 | 2,664 ft |
| August | 67.0 | 1,762 ft | 79.0 | 2,521 ft |
| September | 59.3 | 1,264 ft | 71.6 | 2,055 ft |
| October | 47.2 | 463 ft | 58.1 | 1,186 ft |
| November | 35.8 | −313 ft | 44.1 | 254 ft |
| December | 26.3 | −978 ft | 33.2 | −494 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 KRQB
DENSITY ALTITUDE
Field elevation 994 ft — the air behaves like 2,645 ft.
- PRESSURE ALT
- 995 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 Michigan fields
- 38C — Cain Field
Stanwood · elev 897 ft
- 27C — Mecosta Morton
Mecosta · elev 1,022 ft
- 0C5 — Canadian Lakes
Mecosta · elev 960 ft
- 9C8 — Evart Municipal
Evart · elev 1,020 ft
- 42C — White Cloud
White Cloud · elev 914 ft
- 7D3 — Baldwin Municipal
Baldwin · elev 828 ft
- 13C — Lakeview/Griffith Field
Lakeview · elev 969 ft
- D11 — Ojibwa Airpark
Weidman · elev 959 ft
Frequently asked questions
How high does density altitude get at KRQB in summer?
On a typical July afternoon — around 81 °F at the nearest NOAA normals station — density altitude at Roben-Hood reaches roughly 2,664 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 KRQB on an average day?
It swings with the seasons: from roughly −1,398 ft at the coldest month's average temperature to about 1,903 ft at the warmest month's — all from a constant field elevation of 994 ft. The month-by-month table above carries the full year.
What is the field elevation of Roben-Hood?
994 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KRQB (ICAO) / RQB (FAA), in Big Rapids, Michigan.