Haverhill, New Hampshire · field elev 582 ft
Density Altitude at Dean Meml (5B9)
Dean Meml sits at 582 ft, and even a typical July afternoon (82 °F) only lifts density altitude to about 2,204 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 | 18.2 | −2,075 ft | 29.4 | −1,274 ft |
| February | 20.6 | −1,901 ft | 33.1 | −1,015 ft |
| March | 29.8 | −1,246 ft | 42.2 | −387 ft |
| April | 42.3 | −380 ft | 55.5 | 506 ft |
| May | 54.3 | 427 ft | 68.4 | 1,346 ft |
| June | 63.3 | 1,017 ft | 76.6 | 1,866 ft |
| July | 68.6 | 1,359 ft | 82.0 | 2,204 ft |
| August | 66.9 | 1,249 ft | 80.7 | 2,123 ft |
| September | 59.5 | 769 ft | 72.5 | 1,607 ft |
| October | 46.9 | −68 ft | 58.6 | 710 ft |
| November | 35.8 | −827 ft | 46.3 | −108 ft |
| December | 25.4 | −1,558 ft | 35.2 | −869 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 5B9
DENSITY ALTITUDE
Field elevation 582 ft — the air behaves like 2,204 ft.
- PRESSURE ALT
- 583 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 New Hampshire fields
- 1B5 — Franconia
Franconia · elev 975 ft
- 1P1 — Plymouth Municipal
Plymouth · elev 506 ft
- 8B2 — Twin Mountain
Twin Mountain · elev 1,459 ft
- KHIE — Mount Washington Regional
Whitefield · elev 1,072 ft
- KLEB — Lebanon Municipal
Lebanon · elev 603 ft
- 2N2 — Newfound Valley
Bristol · elev 510 ft
- 4MB — Moultonborough
Moultonborough · elev 576 ft
- 2G8 — Gorham
Gorham · elev 835 ft
Frequently asked questions
How high does density altitude get at 5B9 in summer?
On a typical July afternoon — around 82 °F at the nearest NOAA normals station — density altitude at Dean Meml reaches roughly 2,204 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 5B9 on an average day?
It swings with the seasons: from roughly −2,075 ft at the coldest month's average temperature to about 1,359 ft at the warmest month's — all from a constant field elevation of 582 ft. The month-by-month table above carries the full year.
What is the field elevation of Dean Meml?
582 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 5B9 (FAA), in Haverhill, New Hampshire.