Moultonborough, New Hampshire · field elev 576 ft
Density Altitude at Moultonborough (4MB)
Moultonborough sits at 576 ft, and even a typical July afternoon (82 °F) only lifts density altitude to about 2,184 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 | 19.7 | −1,974 ft | 29.1 | −1,303 ft |
| February | 21.8 | −1,823 ft | 33.1 | −1,022 ft |
| March | 30.5 | −1,205 ft | 41.8 | −422 ft |
| April | 42.8 | −353 ft | 55.2 | 479 ft |
| May | 55.3 | 486 ft | 68.4 | 1,338 ft |
| June | 64.1 | 1,061 ft | 76.7 | 1,865 ft |
| July | 69.2 | 1,390 ft | 81.8 | 2,184 ft |
| August | 67.3 | 1,268 ft | 80.0 | 2,072 ft |
| September | 59.6 | 769 ft | 71.5 | 1,536 ft |
| October | 47.4 | −42 ft | 58.2 | 677 ft |
| November | 35.9 | −828 ft | 45.0 | −204 ft |
| December | 25.7 | −1,544 ft | 34.0 | −960 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 4MB
DENSITY ALTITUDE
Field elevation 576 ft — the air behaves like 2,197 ft.
- PRESSURE ALT
- 577 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
- KLCI — Laconia Municipal
Laconia · elev 545 ft
- 1P1 — Plymouth Municipal
Plymouth · elev 506 ft
- 2N2 — Newfound Valley
Bristol · elev 510 ft
- 1B5 — Franconia
Franconia · elev 975 ft
- 8B2 — Twin Mountain
Twin Mountain · elev 1,459 ft
- 5B9 — Dean Meml
Haverhill · elev 582 ft
- KCON — Concord Municipal
Concord · elev 342 ft
- KDAW — Skyhaven
Rochester · elev 322 ft
Frequently asked questions
How high does density altitude get at 4MB in summer?
On a typical July afternoon — around 82 °F at the nearest NOAA normals station — density altitude at Moultonborough reaches roughly 2,184 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 4MB on an average day?
It swings with the seasons: from roughly −1,974 ft at the coldest month's average temperature to about 1,390 ft at the warmest month's — all from a constant field elevation of 576 ft. The month-by-month table above carries the full year.
What is the field elevation of Moultonborough?
576 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 4MB (FAA), in Moultonborough, New Hampshire.