Frost dates for Ridgeland 1nne, WI
At Ridgeland 1nne, the median last spring frost (32°F) is May 10 and the median first fall frost is Sep 29, for a typical growing season of 140 days. For a 90% chance that the last frost has passed, wait until May 26. Nearby ZIP codes are in USDA hardiness zone 4b.
- May 10Last spring frost (median)50% chance of 32°F after this date
- May 26Safer planting date10% chance of 32°F after this date
- Sep 29First fall frost (median)50% chance of 32°F by this date
- 140 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 8 | May 21 | Jun 3 |
| 32°F | Apr 28 | May 10 | May 26 |
| 28°F | Apr 15 | Apr 30 | May 14 |
| 24°F | Apr 3 | Apr 18 | May 3 |
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 | Sep 4 | Sep 20 | Oct 2 |
| 32°F | Sep 13 | Sep 29 | Oct 12 |
| 28°F | Sep 22 | Oct 9 | Oct 24 |
| 24°F | Oct 3 | Oct 22 | Nov 5 |
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 | 100 days | 121 days | 140 days |
| 32°F | 120 days | 140 days | 160 days |
| 28°F | 138 days | 160 days | 180 days |
| 24°F | 160 days | 183 days | 205 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 |
|---|---|---|---|
| 54763 | 4b | -25 to -20°F | 4 km |
| 54733 | 4b | -25 to -20°F | 8 km |
| 54762 | 4b | -25 to -20°F | 10 km |
| 54772 | 4b | -25 to -20°F | 15 km |
| 54725 | 4b | -25 to -20°F | 18 km |
| 54734 | 4b | -25 to -20°F | 22 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 USC00477174, at 45.2142, -91.8875, elevation 329 m (1,080 ft).
- Data quality: Standard (24+ years of data), 27 years of freeze data.
- Average days per year at or below 32°F: 176.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Rice Lake (24 km)
- Bloomer (34 km)
- Cumberland (37 km)
- Menomonie (38 km)
- Amery (38 km)
- Weyerhaeuser 1n (45 km)
- Jim Falls 3nw (46 km)
- Baldwin (48 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.