Dorris, California · field elev 4,243 ft
Density Altitude at Butte Valley (A32)
From a field elevation of 4,243 ft, a typical July afternoon at Butte Valley (88 °F) raises density altitude to about 7,026 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 | 31.1 | 3,408 ft | 41.1 | 4,079 ft |
| February | 34.5 | 3,638 ft | 46.2 | 4,415 ft |
| March | 39.1 | 3,946 ft | 52.1 | 4,799 ft |
| April | 43.9 | 4,264 ft | 58.0 | 5,177 ft ▲ |
| May | 52.5 | 4,824 ft | 67.9 | 5,799 ft ▲ |
| June | 60.0 | 5,304 ft | 77.2 | 6,371 ft ▲ |
| July | 68.3 | 5,824 ft | 88.1 | 7,026 ft ▲ |
| August | 66.8 | 5,731 ft | 86.6 | 6,937 ft ▲ |
| September | 59.4 | 5,266 ft | 79.4 | 6,505 ft ▲ |
| October | 47.4 | 4,493 ft | 64.2 | 5,568 ft ▲ |
| November | 37.2 | 3,819 ft | 49.1 | 4,604 ft |
| December | 30.5 | 3,367 ft | 40.1 | 4,013 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 A32
DENSITY ALTITUDE caution
Field elevation 4,243 ft — the air behaves like 7,020 ft.
- PRESSURE ALT
- 4,245 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
- KSIY — Siskiyou County
Montague · elev 2,651 ft
- 1O5 — Montague-Yreka Rohrer Field
Montague · elev 2,527 ft
- O81 — Tulelake Municipal
Tulelake · elev 4,049 ft
- O46 — Weed
Weed · elev 2,943 ft
- 1O6 — Dunsmuir Municipal-Mott
Dunsmuir · elev 3,261 ft
- A30 — Scott Valley
Fort Jones · elev 2,728 ft
- O89 — Fall River Mills
Fall River Mills · elev 3,328 ft
- O55 — Southard Field
Bieber · elev 4,163 ft
Frequently asked questions
How high does density altitude get at A32 in summer?
On a typical July afternoon — around 88 °F at the nearest NOAA normals station — density altitude at Butte Valley reaches roughly 7,026 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 A32 on an average day?
It swings with the seasons: from roughly 3,367 ft at the coldest month's average temperature to about 5,824 ft at the warmest month's — all from a constant field elevation of 4,243 ft. The month-by-month table above carries the full year.
What is the field elevation of Butte Valley?
4,243 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is A32 (FAA), in Dorris, California.