Plymouth, New Hampshire · field elev 506 ft
Density Altitude at Plymouth Municipal (1P1)
Plymouth Municipal sits at 506 ft, and even a typical July afternoon (80 °F) only lifts density altitude to about 1,980 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 | 18.1 | −2,178 ft | 28.8 | −1,412 ft |
| February | 20.6 | −1,997 ft | 33.1 | −1,110 ft |
| March | 29.5 | −1,362 ft | 41.2 | −550 ft |
| April | 41.7 | −515 ft | 54.7 | 359 ft |
| May | 53.2 | 260 ft | 67.0 | 1,162 ft |
| June | 61.9 | 832 ft | 75.1 | 1,679 ft |
| July | 67.1 | 1,169 ft | 79.9 | 1,980 ft |
| August | 65.2 | 1,046 ft | 78.7 | 1,905 ft |
| September | 58.2 | 590 ft | 71.8 | 1,470 ft |
| October | 46.0 | −223 ft | 58.4 | 603 ft |
| November | 35.2 | −964 ft | 45.5 | −257 ft |
| December | 24.3 | −1,731 ft | 33.7 | −1,068 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 1P1
DENSITY ALTITUDE
Field elevation 506 ft — the air behaves like 1,986 ft.
- PRESSURE ALT
- 507 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
- 2N2 — Newfound Valley
Bristol · elev 510 ft
- 4MB — Moultonborough
Moultonborough · elev 576 ft
- KLCI — Laconia Municipal
Laconia · elev 545 ft
- 5B9 — Dean Meml
Haverhill · elev 582 ft
- 1B5 — Franconia
Franconia · elev 975 ft
- KLEB — Lebanon Municipal
Lebanon · elev 603 ft
- 2B3 — Parlin Field
Newport · elev 784 ft
- 8B2 — Twin Mountain
Twin Mountain · elev 1,459 ft
Frequently asked questions
How high does density altitude get at 1P1 in summer?
On a typical July afternoon — around 80 °F at the nearest NOAA normals station — density altitude at Plymouth Municipal reaches roughly 1,980 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 1P1 on an average day?
It swings with the seasons: from roughly −2,178 ft at the coldest month's average temperature to about 1,169 ft at the warmest month's — all from a constant field elevation of 506 ft. The month-by-month table above carries the full year.
What is the field elevation of Plymouth Municipal?
506 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 1P1 (FAA), in Plymouth, New Hampshire.