Tool · USDA Plant Hardiness Zone Map 2023
Hardiness Zone by ZIP Code
The 2023 USDA zone of any US ZIP code, the temperature range behind it, and the usual frost dates there.
Hardiness zone for ZIP 55337 — Burnsville, MN
- Hardiness zone, 2023
- 5a
- Coldest night, average
- -20 to -15°F
- -28.9 to -26.1°C
The 2023 USDA Plant Hardiness Zone Map lists ZIP 55337 (Burnsville, MN) in zone 5a: the coldest night of the year averaged -20 to -15°F over 1991–2020. At Minneapolis/St Paul Airport, MN, the NOAA station for this ZIP code, the last 32°F night of spring comes by April 23 in half of years and by May 7 in nine years out of ten; the first of fall comes by October 18 in half of years. That leaves a typical freeze-free season of 176 days.
Frost dates and weather by month for 55337 (Burnsville) →Zone 5a: range, ZIP codes and frost dates →Frost risk on any date in 55337 →
Hardiness zone and temperature range: USDA Plant Hardiness Zone Map 2023 (USDA-ARS, Oregon State University), ZIP-code listing, unchanged. °C converted from °F by this site.
All zones in the 2023 ZIP listing
| Zone | Coldest night, °F | °C | ZIP codes listed | Frost pages here |
|---|---|---|---|---|
| 1a | -60 to -55 | -51.1 to -48.3 | 5 | 0 |
| 1b | -55 to -50 | -48.3 to -45.6 | 11 | 0 |
| 2a | -50 to -45 | -45.6 to -42.8 | 27 | 3 |
| 2b | -45 to -40 | -42.8 to -40.0 | 17 | 2 |
| 3a | -40 to -35 | -40.0 to -37.2 | 23 | 3 |
| 3b | -35 to -30 | -37.2 to -34.4 | 230 | 40 |
| 4a | -30 to -25 | -34.4 to -31.7 | 814 | 158 |
| 4b | -25 to -20 | -31.7 to -28.9 | 1,284 | 404 |
| 5a | -20 to -15 | -28.9 to -26.1 | 2,426 | 822 |
| 5b | -15 to -10 | -26.1 to -23.3 | 2,880 | 1,121 |
| 6a | -10 to -5 | -23.3 to -20.6 | 5,187 | 2,414 |
| 6b | -5 to 0 | -20.6 to -17.8 | 5,271 | 2,460 |
| 7a | 0 to 5 | -17.8 to -15.0 | 4,877 | 2,144 |
| 7b | 5 to 10 | -15.0 to -12.2 | 3,855 | 2,041 |
| 8a | 10 to 15 | -12.2 to -9.4 | 3,430 | 1,602 |
| 8b | 15 to 20 | -9.4 to -6.7 | 3,379 | 1,695 |
| 9a | 20 to 25 | -6.7 to -3.9 | 2,199 | 1,148 |
| 9b | 25 to 30 | -3.9 to -1.1 | 2,085 | 1,121 |
| 10a | 30 to 35 | -1.1 to 1.7 | 1,234 | 713 |
| 10b | 35 to 40 | 1.7 to 4.4 | 752 | 444 |
| 11a | 40 to 45 | 4.4 to 7.2 | 205 | 110 |
| 11b | 45 to 50 | 7.2 to 10.0 | 16 | 9 |
| 12a | 50 to 55 | 10.0 to 12.8 | 30 | 20 |
| 12b | 55 to 60 | 12.8 to 15.6 | 137 | 81 |
| 13a | 60 to 65 | 15.6 to 18.3 | 102 | 67 |
| 13b | 65 to 70 | 18.3 to 21.1 | 26 | 12 |
Hardiness zone and temperature range: USDA Plant Hardiness Zone Map 2023 (USDA-ARS, Oregon State University), ZIP-code listing, unchanged. °C converted from °F by this site.
Where the zone comes from
The zone is read, unchanged, from the ZIP-code files that the PRISM Group at Oregon State University publishes with the 2023 USDA Plant Hardiness Zone Map: 39,921 ZIP codes for the lower 48 states and DC, 272 ZIP codes for Alaska, 133 ZIP codes for Hawaii and 176 ZIP codes for Puerto Rico, 40,502 in all. The map assigns a zone from the average of each year's coldest night over 1991–2020; each zone in the files spans 5°F, from 1a (-60 to -55°F) to 13b (65 to 70°F). The most common zone in the listing is 6b, with 5,271 ZIP codes.
A zone describes winter lows; it does not say when the last spring frost comes. The frost dates in the answer come from the nearest NOAA station with 1991–2020 freeze normals, the same figures as on the risk by date tool and every ZIP code page. ZIP codes without a station within 100 miles get the zone alone. Sources and limits: methodology.