Modesto, California · field elev 99 ft
Density Altitude at Modesto City-County-Harry Sham Field (KMOD)
Modesto City-County-Harry Sham Field sits at 99 ft, and even a typical July afternoon (95 °F) only lifts density altitude to about 2,413 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 | 47.5 | −627 ft | 56.1 | −51 ft |
| February | 52.0 | −324 ft | 62.2 | 350 ft |
| March | 56.7 | −11 ft | 68.1 | 733 ft |
| April | 61.1 | 278 ft | 73.8 | 1,097 ft |
| May | 67.8 | 713 ft | 82.0 | 1,614 ft |
| June | 74.5 | 1,142 ft | 89.7 | 2,090 ft |
| July | 78.8 | 1,413 ft | 95.0 | 2,413 ft |
| August | 77.8 | 1,351 ft | 93.5 | 2,322 ft |
| September | 73.9 | 1,104 ft | 89.1 | 2,053 ft |
| October | 65.2 | 545 ft | 79.0 | 1,426 ft |
| November | 54.5 | −157 ft | 65.7 | 578 ft |
| December | 47.4 | −634 ft | 56.2 | −44 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 KMOD
DENSITY ALTITUDE
Field elevation 99 ft — the air behaves like 2,413 ft.
- PRESSURE ALT
- 100 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
- O27 — Oakdale
Oakdale · elev 237 ft
- O15 — Turlock Municipal
Turlock · elev 161 ft
- 1Q4 — New Jerusalem
Tracy · elev 62 ft
- KSCK — Stockton Metro
Stockton · elev 33 ft
- 3O1 — Gustine
Gustine · elev 79 ft
- KTCY — Tracy Municipal
Tracy · elev 194 ft
- KMER — Castle
Atwater · elev 190 ft
- KMCE — Merced Yosemite Regional
Merced · elev 155 ft
Frequently asked questions
How high does density altitude get at KMOD in summer?
On a typical July afternoon — around 95 °F at the nearest NOAA normals station — density altitude at Modesto City-County-Harry Sham Field reaches roughly 2,413 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 KMOD on an average day?
It swings with the seasons: from roughly −634 ft at the coldest month's average temperature to about 1,413 ft at the warmest month's — all from a constant field elevation of 99 ft. The month-by-month table above carries the full year.
What is the field elevation of Modesto City-County-Harry Sham Field?
99 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KMOD (ICAO) / MOD (FAA), in Modesto, California.