Fort Atkinson, Wisconsin · field elev 800 ft
Density Altitude at Fort Atkinson Municipal (61C)
Fort Atkinson Municipal sits at 800 ft, and even a typical July afternoon (82 °F) only lifts density altitude to about 2,495 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 | 18.9 | −1,750 ft | 26.8 | −1,185 ft |
| February | 22.6 | −1,484 ft | 31.1 | −882 ft |
| March | 33.9 | −687 ft | 43.2 | −48 ft |
| April | 45.9 | 135 ft | 56.3 | 828 ft |
| May | 58.4 | 966 ft | 68.7 | 1,633 ft |
| June | 68.4 | 1,614 ft | 78.8 | 2,271 ft |
| July | 72.4 | 1,868 ft | 82.4 | 2,495 ft |
| August | 70.6 | 1,754 ft | 80.4 | 2,371 ft |
| September | 62.7 | 1,247 ft | 73.6 | 1,944 ft |
| October | 50.5 | 444 ft | 60.3 | 1,090 ft |
| November | 36.8 | −486 ft | 45.1 | 81 ft |
| December | 25.3 | −1,292 ft | 32.5 | −785 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 61C
DENSITY ALTITUDE
Field elevation 800 ft — the air behaves like 2,470 ft.
- PRESSURE ALT
- 801 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 Wisconsin fields
- 5Y3 — Gutzmer'S Twin Oaks
Whitewater · elev 821 ft
- W11 — Lake Country
Sullivan · elev 843 ft
- 88C — Palmyra Municipal
Palmyra · elev 851 ft
- 58C — Jana
Edgerton · elev 843 ft
- KRYV — Watertown Municipal
Watertown · elev 833 ft
- 87Y — Blackhawk Airfield
Madison · elev 920 ft
- C59 — Lake Lawn
Delavan · elev 981 ft
- 57C — East Troy Municipal
East Troy · elev 860 ft
Frequently asked questions
How high does density altitude get at 61C in summer?
On a typical July afternoon — around 82 °F at the nearest NOAA normals station — density altitude at Fort Atkinson Municipal reaches roughly 2,495 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 61C on an average day?
It swings with the seasons: from roughly −1,750 ft at the coldest month's average temperature to about 1,868 ft at the warmest month's — all from a constant field elevation of 800 ft. The month-by-month table above carries the full year.
What is the field elevation of Fort Atkinson Municipal?
800 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is 61C (FAA), in Fort Atkinson, Wisconsin.