Lone Rock, Wisconsin · field elev 717 ft
Density Altitude at Tri-County Regional (KLNR)
Tri-County Regional sits at 717 ft, and even a typical July afternoon (83 °F) only lifts density altitude to about 2,412 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 | 18.7 | −1,869 ft | 27.5 | −1,240 ft |
| February | 23.0 | −1,560 ft | 32.2 | −909 ft |
| March | 35.5 | −680 ft | 45.1 | −22 ft |
| April | 47.3 | 127 ft | 58.4 | 864 ft |
| May | 59.2 | 916 ft | 70.4 | 1,639 ft |
| June | 68.6 | 1,524 ft | 79.4 | 2,207 ft |
| July | 72.0 | 1,741 ft | 82.7 | 2,412 ft |
| August | 69.8 | 1,601 ft | 80.5 | 2,275 ft |
| September | 62.1 | 1,105 ft | 73.7 | 1,849 ft |
| October | 49.6 | 281 ft | 60.5 | 1,001 ft |
| November | 36.8 | −590 ft | 45.7 | 19 ft |
| December | 24.7 | −1,438 ft | 32.9 | −860 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 KLNR
DENSITY ALTITUDE
Field elevation 717 ft — the air behaves like 2,431 ft.
- PRESSURE ALT
- 718 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
- 93C — Richland
Richland Center · elev 742 ft
- 91C — Sauk/Prairie
Prairie Du Sac · elev 832 ft
- KMRJ — Iowa County
Mineral Point · elev 1,171 ft
- C35 — Reedsburg Municipal
Reedsburg · elev 906 ft
- KOVS — Boscobel
Boscobel · elev 673 ft
- KDLL — Baraboo/Wisconsin Dells Regional
Baraboo · elev 980 ft
- C29 — Middleton Municipal/Morey Field
Middleton · elev 928 ft
- 60C — Elroy
Elroy · elev 944 ft
Frequently asked questions
How high does density altitude get at KLNR in summer?
On a typical July afternoon — around 83 °F at the nearest NOAA normals station — density altitude at Tri-County Regional reaches roughly 2,412 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 KLNR on an average day?
It swings with the seasons: from roughly −1,869 ft at the coldest month's average temperature to about 1,741 ft at the warmest month's — all from a constant field elevation of 717 ft. The month-by-month table above carries the full year.
What is the field elevation of Tri-County Regional?
717 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KLNR (ICAO) / LNR (FAA), in Lone Rock, Wisconsin.