Hillsdale, Michigan · field elev 1,184 ft
Density Altitude at Hillsdale Municipal (KJYM)
Hillsdale Municipal sits at 1,184 ft, and even a typical July afternoon (83 °F) only lifts density altitude to about 2,970 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 | 22.8 | −988 ft | 30.6 | −438 ft |
| February | 25.1 | −825 ft | 33.9 | −208 ft |
| March | 34.4 | −173 ft | 44.3 | 504 ft |
| April | 46.3 | 638 ft | 57.7 | 1,394 ft |
| May | 58.1 | 1,420 ft | 69.3 | 2,142 ft |
| June | 67.5 | 2,028 ft | 78.5 | 2,722 ft |
| July | 71.2 | 2,263 ft | 82.5 | 2,970 ft |
| August | 69.2 | 2,136 ft | 80.1 | 2,821 ft |
| September | 62.1 | 1,680 ft | 73.9 | 2,434 ft |
| October | 50.4 | 913 ft | 61.1 | 1,616 ft |
| November | 38.7 | 123 ft | 47.2 | 699 ft |
| December | 28.7 | −571 ft | 35.7 | −84 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 KJYM
DENSITY ALTITUDE
Field elevation 1,184 ft — the air behaves like 3,000 ft.
- PRESSURE ALT
- 1,185 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
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- KOEB — Branch County Meml
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- 3NP — Napoleon
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- KJXN — Jackson County/Reynolds Field
Jackson · elev 1,001 ft
- KADG — Lenawee County
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- 26W — Wolf Lake
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- KRMY — Brooks Field
Marshall · elev 941 ft
Frequently asked questions
How high does density altitude get at KJYM in summer?
On a typical July afternoon — around 83 °F at the nearest NOAA normals station — density altitude at Hillsdale Municipal reaches roughly 2,970 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 KJYM on an average day?
It swings with the seasons: from roughly −988 ft at the coldest month's average temperature to about 2,263 ft at the warmest month's — all from a constant field elevation of 1,184 ft. The month-by-month table above carries the full year.
What is the field elevation of Hillsdale Municipal?
1,184 ft MSL, from the FAA NASR airport record (28-day cycle effective 2026-08-06). The identifier is KJYM (ICAO) / JYM (FAA), in Hillsdale, Michigan.