Alturas, California · field elev 4,378 ft
Density Altitude at Alturas Municipal (KAAT)
From a field elevation of 4,378 ft, a typical July afternoon at Alturas Municipal (89 °F) raises density altitude to about 7,249 ft — solidly into the range where performance charts deserve a close read.
Typical density altitude by month
| Month | Avg temp °F | DA at avg temp | Afternoon high °F | DA on a typical afternoon |
|---|---|---|---|---|
| January | 31.8 | 3,623 ft | 43.0 | 4,371 ft |
| February | 34.8 | 3,825 ft | 46.6 | 4,608 ft |
| March | 39.6 | 4,146 ft | 52.7 | 5,003 ft ▲ |
| April | 44.3 | 4,457 ft | 58.4 | 5,368 ft ▲ |
| May | 52.5 | 4,990 ft | 67.9 | 5,964 ft ▲ |
| June | 60.2 | 5,482 ft | 78.2 | 6,596 ft ▲ |
| July | 68.2 | 5,983 ft | 89.1 | 7,249 ft ▲ |
| August | 65.8 | 5,834 ft | 87.3 | 7,142 ft ▲ |
| September | 58.5 | 5,374 ft | 79.7 | 6,687 ft ▲ |
| October | 47.5 | 4,666 ft | 65.7 | 5,827 ft ▲ |
| November | 37.7 | 4,020 ft | 50.8 | 4,881 ft |
| December | 30.5 | 3,535 ft | 41.0 | 4,239 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 KAAT
DENSITY ALTITUDE caution
Field elevation 4,378 ft — the air behaves like 7,243 ft.
- PRESSURE ALT
- 4,380 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 California fields
- A24 — California Pines
Alturas · elev 4,389 ft
- O59 — Cedarville
Cedarville · elev 4,623 ft
- A26 — Adin
Adin · elev 4,234 ft
- A28 — Fort Bidwell
Fort Bidwell · elev 4,616 ft
- O55 — Southard Field
Bieber · elev 4,163 ft
- O39 — Ravendale
Ravendale · elev 5,306 ft
- O81 — Tulelake Municipal
Tulelake · elev 4,049 ft
- O89 — Fall River Mills
Fall River Mills · elev 3,328 ft
Frequently asked questions
How high does density altitude get at KAAT in summer?
On a typical July afternoon — around 89 °F at the nearest NOAA normals station — density altitude at Alturas Municipal reaches roughly 7,249 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 KAAT on an average day?
It swings with the seasons: from roughly 3,535 ft at the coldest month's average temperature to about 5,983 ft at the warmest month's — all from a constant field elevation of 4,378 ft. The month-by-month table above carries the full year.
What is the field elevation of Alturas Municipal?
4,378 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KAAT (ICAO) / AAT (FAA), in Alturas, California.