Hollister, California · field elev 152 ft
Density Altitude at Frazier Lake Airpark (1C9)
Frazier Lake Airpark sits at 152 ft, and even a typical July afternoon (87 °F) only lifts density altitude to about 2,001 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 | 49.4 | −433 ft | 60.7 | 317 ft |
| February | 52.2 | −245 ft | 64.0 | 533 ft |
| March | 55.3 | −39 ft | 68.1 | 798 ft |
| April | 58.2 | 153 ft | 71.9 | 1,042 ft |
| May | 63.1 | 474 ft | 77.3 | 1,384 ft |
| June | 67.2 | 740 ft | 82.8 | 1,728 ft |
| July | 70.6 | 958 ft | 87.2 | 2,001 ft |
| August | 70.8 | 971 ft | 87.2 | 2,001 ft |
| September | 68.7 | 837 ft | 84.9 | 1,859 ft |
| October | 63.4 | 494 ft | 78.8 | 1,478 ft |
| November | 55.0 | −58 ft | 68.3 | 811 ft |
| December | 48.7 | −480 ft | 60.4 | 298 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 1C9
DENSITY ALTITUDE
Field elevation 152 ft — the air behaves like 1,988 ft.
- PRESSURE ALT
- 153 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
- KCVH — Hollister Municipal
Hollister · elev 231 ft
- E16 — San Martin
San Martin · elev 284 ft
- KWVI — Watsonville Municipal
Watsonville · elev 163 ft
- KSNS — Salinas Municipal
Salinas · elev 84 ft
- KOAR — Marina Municipal
Marina · elev 137 ft
- KRHV — Reid-Hillview Of Santa Clara County
San Jose · elev 135 ft
- KMRY — Monterey Regional
Monterey · elev 257 ft
- KLSN — Los Banos Municipal
Los Banos · elev 121 ft
Frequently asked questions
How high does density altitude get at 1C9 in summer?
On a typical July afternoon — around 87 °F at the nearest NOAA normals station — density altitude at Frazier Lake Airpark reaches roughly 2,001 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 1C9 on an average day?
It swings with the seasons: from roughly −480 ft at the coldest month's average temperature to about 971 ft at the warmest month's — all from a constant field elevation of 152 ft. The month-by-month table above carries the full year.
What is the field elevation of Frazier Lake Airpark?
152 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 1C9 (FAA), in Hollister, California.