Canon, Georgia · field elev 890 ft
Density Altitude at Franklin-Hart (18A)
Franklin-Hart sits at 890 ft, and even a typical July afternoon (89 °F) only lifts density altitude to about 3,004 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 | 42.4 | 10 ft | 52.3 | 675 ft |
| February | 45.6 | 227 ft | 56.1 | 926 ft |
| March | 52.7 | 702 ft | 64.0 | 1,441 ft |
| April | 60.8 | 1,234 ft | 72.3 | 1,972 ft |
| May | 68.8 | 1,750 ft | 79.0 | 2,393 ft |
| June | 76.1 | 2,212 ft | 85.8 | 2,814 ft |
| July | 79.4 | 2,418 ft | 88.9 | 3,004 ft |
| August | 78.2 | 2,344 ft | 87.2 | 2,900 ft |
| September | 72.7 | 1,998 ft | 81.9 | 2,574 ft |
| October | 62.1 | 1,318 ft | 72.0 | 1,953 ft |
| November | 51.8 | 642 ft | 62.3 | 1,331 ft |
| December | 45.1 | 193 ft | 54.6 | 827 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 18A
DENSITY ALTITUDE
Field elevation 890 ft — the air behaves like 3,010 ft.
- PRESSURE ALT
- 891 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 Georgia fields
- KTOC — Toccoa Rg Letourneau Field
Toccoa · elev 996 ft
- KEBA — Elbert County-Patz Field
Elberton · elev 615 ft
- KAJR — Habersham County
Cornelia · elev 1,448 ft
- KJCA — Jackson County
Jefferson · elev 951 ft
- KAHN — Athens/Ben Epps
Athens · elev 812 ft
- KWDR — Barrow County
Winder · elev 934 ft
- KGVL — Lee Gilmer Meml
Gainesville · elev 1,277 ft
- KIIY — Washington/Wilkes County
Washington · elev 646 ft
Frequently asked questions
How high does density altitude get at 18A in summer?
On a typical July afternoon — around 89 °F at the nearest NOAA normals station — density altitude at Franklin-Hart reaches roughly 3,004 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 18A on an average day?
It swings with the seasons: from roughly 10 ft at the coldest month's average temperature to about 2,418 ft at the warmest month's — all from a constant field elevation of 890 ft. The month-by-month table above carries the full year.
What is the field elevation of Franklin-Hart?
890 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 18A (FAA), in Canon, Georgia.