Frost dates for Prentice #2, WI
At Prentice #2, the median last spring frost (32°F) is May 23 and the median first fall frost is Sep 23, for a typical growing season of 124 days. For a 90% chance that the last frost has passed, wait until Jun 6. Nearby ZIP codes are in USDA hardiness zone 4a.
- May 23Last spring frost (median)50% chance of 32°F after this date
- Jun 6Safer planting date10% chance of 32°F after this date
- Sep 23First fall frost (median)50% chance of 32°F by this date
- 124 daysGrowing season (median)between 32°F freezes
Last spring frost dates
The chance that the temperature drops to the threshold after each date.
| Temperature | 90% chance later | 50% chance later | 10% chance later |
|---|---|---|---|
| 36°F | May 20 | Jun 2 | Jun 22 |
| 32°F | May 6 | May 23 | Jun 6 |
| 28°F | Apr 24 | May 9 | May 24 |
| 24°F | Apr 12 | Apr 28 | May 13 |
First fall frost dates
The chance that the temperature has dropped to the threshold by each date.
| Temperature | 10% chance by | 50% chance by | 90% chance by |
|---|---|---|---|
| 36°F | Aug 23 | Sep 10 | Sep 25 |
| 32°F | Sep 5 | Sep 23 | Oct 5 |
| 28°F | Sep 19 | Oct 3 | Oct 18 |
| 24°F | Sep 30 | Oct 14 | Oct 31 |
Growing season length
Days between the last spring and first fall freeze, as the length reached in 9, 5 and 1 out of 10 years.
| Temperature | 9 in 10 years at least | 5 in 10 years at least | 1 in 10 years at least |
|---|---|---|---|
| 36°F | 70 days | 98 days | 120 days |
| 32°F | 102 days | 124 days | 144 days |
| 28°F | 125 days | 146 days | 167 days |
| 24°F | 144 days | 169 days | 193 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 100% |
ZIP codes whose closest station is this one
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 54556 | 4a | -30 to -25°F | 2 km |
| 54513 | 4a | -30 to -25°F | 13 km |
| 54515 | 4a | -30 to -25°F | 15 km |
| 54459 | 4a | -30 to -25°F | 16 km |
Not the official USDA Plant Hardiness Zone Map. Zones shown here are the values published in the USDA-ARS / Oregon State University PRISM Group 2023 ZIP code tables, shown unaltered. For the official interactive map, visit planthardiness.ars.usda.gov.
About this station
- NOAA station ID USC00476859, at 45.5447, -90.3017, elevation 469 m (1,540 ft).
- Data quality: Representative (10+ years), 20 years of freeze data.
- Average days per year at or below 32°F: 190.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Willow Rsvr (40 km)
- Jump River 3e (41 km)
- Rice Rsvr Tomahawk-2 (44 km)
- Park Falls Dnr HQ (45 km)
- Medford (46 km)
- Big Falls Hydro (51 km)
- Butternut 3sw (52 km)
- Minocqua (58 km)
Sources
- NOAA National Centers for Environmental Information, U.S. Climate Normals 1991–2020, annual/seasonal normals by station (version 1.0.1), file dated June 27, 2023; documentation.
- USDA Agricultural Research Service and PRISM Group, Oregon State University, 2023 Plant Hardiness Zone Map ZIP code tables (CONUS, Alaska, Hawaii, Puerto Rico), files dated November 17, 2023. Data © PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed November 1, 2026. Official map: planthardiness.ars.usda.gov.
- U.S. Census Bureau, 2024 Gazetteer ZIP Code Tabulation Areas file, dated August 30, 2024 (ZIP centroids used to find the nearest station).
Freeze dates are 30-year probabilities, not forecasts. Check your local forecast before planting tender plants.