Tulelake, California · field elev 4,049 ft
Density Altitude at Tulelake Municipal (O81)
From a field elevation of 4,049 ft, a typical July afternoon at Tulelake Municipal (86 °F) raises density altitude to about 6,684 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 | 31.9 | 3,221 ft | 42.4 | 3,925 ft |
| February | 34.9 | 3,424 ft | 47.2 | 4,241 ft |
| March | 39.6 | 3,739 ft | 53.4 | 4,644 ft |
| April | 44.4 | 4,057 ft | 59.2 | 5,015 ft ▲ |
| May | 53.0 | 4,618 ft | 68.9 | 5,625 ft ▲ |
| June | 59.5 | 5,034 ft | 76.8 | 6,111 ft ▲ |
| July | 66.8 | 5,494 ft | 86.3 | 6,684 ft ▲ |
| August | 65.0 | 5,381 ft | 85.5 | 6,636 ft ▲ |
| September | 58.4 | 4,964 ft | 79.0 | 6,245 ft ▲ |
| October | 48.1 | 4,300 ft | 65.8 | 5,431 ft ▲ |
| November | 37.4 | 3,592 ft | 49.8 | 4,411 ft |
| December | 30.5 | 3,126 ft | 40.8 | 3,819 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 O81
DENSITY ALTITUDE caution
Field elevation 4,049 ft — the air behaves like 6,666 ft.
- PRESSURE ALT
- 4,051 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
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Frequently asked questions
How high does density altitude get at O81 in summer?
On a typical July afternoon — around 86 °F at the nearest NOAA normals station — density altitude at Tulelake Municipal reaches roughly 6,684 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 O81 on an average day?
It swings with the seasons: from roughly 3,126 ft at the coldest month's average temperature to about 5,494 ft at the warmest month's — all from a constant field elevation of 4,049 ft. The month-by-month table above carries the full year.
What is the field elevation of Tulelake Municipal?
4,049 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is O81 (FAA), in Tulelake, California.