Nashua, New Hampshire · field elev 200 ft
Density Altitude at Boire Field (KASH)
Boire Field sits at 200 ft, and even a typical July afternoon (84 °F) only lifts density altitude to about 1,861 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 | 24.1 | −2,130 ft | 34.4 | −1,401 ft |
| February | 26.1 | −1,987 ft | 37.4 | −1,193 ft |
| March | 34.3 | −1,408 ft | 45.1 | −664 ft |
| April | 46.4 | −576 ft | 58.5 | 232 ft |
| May | 58.0 | 199 ft | 70.0 | 979 ft |
| June | 67.1 | 793 ft | 78.4 | 1,512 ft |
| July | 72.7 | 1,151 ft | 84.0 | 1,861 ft |
| August | 70.9 | 1,037 ft | 82.6 | 1,775 ft |
| September | 63.3 | 546 ft | 75.3 | 1,316 ft |
| October | 50.8 | −279 ft | 62.8 | 514 ft |
| November | 40.2 | −999 ft | 51.0 | −266 ft |
| December | 30.4 | −1,682 ft | 40.0 | −1,013 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 KASH
DENSITY ALTITUDE
Field elevation 200 ft — the air behaves like 1,861 ft.
- PRESSURE ALT
- 201 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
- KMHT — Manchester Boston Regional
Manchester · elev 266 ft
- KAFN — Jaffrey Airfield Silver Ranch
Jaffrey · elev 1,040 ft
- 8B1 — Hawthorne-Feather Airpark
Hillsboro · elev 600 ft
- KCON — Concord Municipal
Concord · elev 342 ft
- 7B3 — Hampton Airfield
Hampton · elev 93 ft
- KEEN — Dillant/Hopkins
Keene · elev 488 ft
- KPSM — Portsmouth International At Pease
Portsmouth · elev 100 ft
- KDAW — Skyhaven
Rochester · elev 322 ft
Frequently asked questions
How high does density altitude get at KASH in summer?
On a typical July afternoon — around 84 °F at the nearest NOAA normals station — density altitude at Boire Field reaches roughly 1,861 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 KASH on an average day?
It swings with the seasons: from roughly −2,130 ft at the coldest month's average temperature to about 1,151 ft at the warmest month's — all from a constant field elevation of 200 ft. The month-by-month table above carries the full year.
What is the field elevation of Boire Field?
200 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KASH (ICAO) / ASH (FAA), in Nashua, New Hampshire.