Siren, Wisconsin · field elev 989 ft
Density Altitude at Burnett County (KRZN)
Burnett County sits at 989 ft, and even a typical July afternoon (80 °F) only lifts density altitude to about 2,558 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 | 11.9 | −2,022 ft | 21.6 | −1,319 ft |
| February | 16.9 | −1,657 ft | 27.4 | −906 ft |
| March | 29.4 | −765 ft | 39.7 | −51 ft |
| April | 42.7 | 153 ft | 53.9 | 904 ft |
| May | 55.4 | 1,003 ft | 67.3 | 1,775 ft |
| June | 64.2 | 1,576 ft | 75.5 | 2,295 ft |
| July | 69.0 | 1,884 ft | 79.7 | 2,558 ft |
| August | 67.1 | 1,763 ft | 78.1 | 2,458 ft |
| September | 59.1 | 1,245 ft | 70.0 | 1,948 ft |
| October | 45.9 | 370 ft | 55.9 | 1,035 ft |
| November | 32.0 | −583 ft | 40.2 | −17 ft |
| December | 18.8 | −1,520 ft | 26.8 | −949 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 KRZN
DENSITY ALTITUDE
Field elevation 989 ft — the air behaves like 2,577 ft.
- PRESSURE ALT
- 990 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
- KGTG — Grantsburg Municipal
Grantsburg · elev 927 ft
- KSSQ — Shell Lake Municipal
Shell Lake · elev 1,233 ft
- 1H9 — Nest Of Eagles
Spooner · elev 1,115 ft
- KUBE — Cumberland Municipal
Cumberland · elev 1,243 ft
- KAHH — Amery Municipal
Amery · elev 1,088 ft
- KOEO — L O Simenstad Municipal
Osceola · elev 906 ft
- 9Y7 — Barron Municipal
Barron · elev 1,110 ft
- KRPD — Rice Lake Regional/Carl'S Field
Rice Lake · elev 1,109 ft
Frequently asked questions
How high does density altitude get at KRZN in summer?
On a typical July afternoon — around 80 °F at the nearest NOAA normals station — density altitude at Burnett County reaches roughly 2,558 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 KRZN on an average day?
It swings with the seasons: from roughly −2,022 ft at the coldest month's average temperature to about 1,884 ft at the warmest month's — all from a constant field elevation of 989 ft. The month-by-month table above carries the full year.
What is the field elevation of Burnett County?
989 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KRZN (ICAO) / RZN (FAA), in Siren, Wisconsin.