Frost dates by ZIP code: The nearest NOAA stations to your ZIP, 1991-2020 normals
Enter a five-digit ZIP code. PlainClimate finds its center (Census Bureau 2024) and the five nearest NOAA stations with frost dates, and shows each station's last spring and first autumn 32°F dates with its distance and elevation.
Frost dates near ZIP 80904
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 80904 in zone 6a (the coldest night of a typical year: -10 to -5°F).
The nearest station, Ruxton Park, CO, is 6 miles from the ZIP's center: its last spring frost comes after June 3 in half of years and after June 23 in one year in ten. By the USDA's method its plant hardiness zone is 5b.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Ruxton Park, CO | 6 mi | 9,060 ft | June 3 | June 23 | September 17 | 5b |
| Colorado Springs, COColorado Springs Municipal Airport | 10 mi | 6,181 ft | May 3 | May 15 | October 8 | 6a |
| Cumbre Vista - Colorado Springs 1, CO | 11 mi | 6,942 ft | May 9 | May 20 | October 6 | – |
| Black Forest, CO6 mi WNW | 12 mi | 6,957 ft | May 11 | May 25 | October 6 | 6a |
| Monument, CO3 mi S | 13 mi | 6,821 ft | May 17 | May 30 | October 1 | – |
Frost comes later in spring at higher and colder stations and earlier in low, open ground: prefer a station at a similar elevation to yours. Hardiness zone in the table: the USDA's rule (the average of each year's coldest night, 1991-2020) applied to the station's own record.
Every frost threshold at Ruxton Park
NOAA publishes the dates for several temperatures and odds. A 30% spring date means a 3-in-10 chance of a later frost (the convention almanacs use); 50% is the median; 10% the cautious date.
| Threshold | Spring, 10% | Spring, 30% | Spring, 50% | Spring, 90% | Autumn, 50% | Autumn, 10% |
|---|---|---|---|---|---|---|
| 32°F | June 23 | June 10 | June 3 | May 21 | September 17 | August 30 |
| 28°F (hard freeze) | June 6 | May 29 | May 22 | May 9 | September 28 | September 11 |
| 24°F | May 26 | May 16 | May 11 | April 30 | October 8 | September 21 |
Source: NOAA NCEI 1991-2020 annual normals; ZIP centers: Census Bureau 2024 Gazetteer; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026. Autumn 10%: one year in ten has its first frost before this date.