Rockland, Maine · field elev 55 ft
Density Altitude at Knox County Regional (KRKD)
Knox County Regional sits at 55 ft, and even a typical July afternoon (74 °F) only lifts density altitude to about 1,069 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 | 26.3 | −2,154 ft | 35.2 | −1,526 ft |
| February | 27.9 | −2,040 ft | 36.6 | −1,429 ft |
| March | 33.9 | −1,617 ft | 42.5 | −1,022 ft |
| April | 42.7 | −1,008 ft | 51.4 | −419 ft |
| May | 51.7 | −399 ft | 60.6 | 191 ft |
| June | 59.4 | 112 ft | 68.7 | 717 ft |
| July | 65.2 | 491 ft | 74.2 | 1,069 ft |
| August | 65.3 | 498 ft | 74.0 | 1,056 ft |
| September | 59.8 | 139 ft | 68.2 | 685 ft |
| October | 50.6 | −472 ft | 58.5 | 53 ft |
| November | 41.4 | −1,097 ft | 49.1 | −573 ft |
| December | 32.5 | −1,715 ft | 40.6 | −1,152 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 KRKD
DENSITY ALTITUDE
Field elevation 55 ft — the air behaves like 1,056 ft.
- PRESSURE ALT
- 56 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 Maine fields
- 57B — Islesboro
Islesboro · elev 88 ft
- 93B — Stonington Municipal
Stonington · elev 32 ft
- KBST — Belfast Municipal
Belfast · elev 198 ft
- KIWI — Wiscasset
Wiscasset · elev 70 ft
- ME5 — Banks
Swans Island · elev 100 ft
- KAUG — Augusta State
Augusta · elev 352 ft
- 08B — Merrymeeting Field
Bowdoinham · elev 61 ft
- KBXM — Brunswick Exec
Brunswick · elev 75 ft
Frequently asked questions
How high does density altitude get at KRKD in summer?
On a typical July afternoon — around 74 °F at the nearest NOAA normals station — density altitude at Knox County Regional reaches roughly 1,069 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 KRKD on an average day?
It swings with the seasons: from roughly −2,154 ft at the coldest month's average temperature to about 498 ft at the warmest month's — all from a constant field elevation of 55 ft. The month-by-month table above carries the full year.
What is the field elevation of Knox County Regional?
55 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KRKD (ICAO) / RKD (FAA), in Rockland, Maine.