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 81001
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 81001 in zone 6a (the coldest night of a typical year: -10 to -5°F).
The nearest station, Weather Office Pueblo, CO, is 1 miles from the ZIP's center: its last spring frost comes after April 30 in half of years and after May 12 in one year in ten.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Weather Office Pueblo, CO | 1 mi | 4,653 ft | April 30 | May 12 | October 9 | – |
| Pueblo, COPueblo Memorial Airport | 2 mi | 4,720 ft | April 30 | May 12 | October 9 | 5b |
| Pueblo Reservoir, CO | 10 mi | 4,861 ft | April 26 | May 8 | October 13 | 6a |
| Tacony (13 mi SE), CO | 26 mi | 4,882 ft | May 5 | May 16 | October 6 | 6a |
| Ellicott, CO7 mi S | 32 mi | 5,739 ft | May 6 | May 28 | October 3 | – |
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 Weather Office Pueblo
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% |
|---|---|---|---|---|---|---|
| 36°F (light frost) | May 23 | May 14 | May 9 | April 28 | October 2 | September 22 |
| 32°F | May 12 | May 4 | April 30 | April 16 | October 9 | September 28 |
| 28°F (hard freeze) | May 4 | April 24 | April 18 | April 3 | October 18 | October 5 |
| 24°F | April 23 | April 12 | April 6 | March 22 | October 26 | October 13 |
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.