Frost dates for Wausau Dwtn Airport, WI
At Wausau Dwtn Airport, the median last spring frost (32°F) is May 6 and the median first fall frost is Oct 4, for a typical growing season of 150 days. For a 90% chance that the last frost has passed, wait until May 21. Nearby ZIP codes are in USDA hardiness zones 4b to 5a.
- May 6Last spring frost (median)50% chance of 32°F after this date
- May 21Safer planting date10% chance of 32°F after this date
- Oct 4First fall frost (median)50% chance of 32°F by this date
- 150 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 4 | May 19 | May 31 |
| 32°F | Apr 24 | May 6 | May 21 |
| 28°F | Apr 12 | Apr 26 | May 10 |
| 24°F | Apr 1 | Apr 15 | Apr 29 |
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 12 | Sep 25 | Oct 7 |
| 32°F | Sep 21 | Oct 4 | Oct 18 |
| 28°F | Oct 1 | Oct 16 | Oct 31 |
| 24°F | Oct 14 | Oct 30 | Nov 13 |
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 | 111 days | 130 days | 148 days |
| 32°F | 130 days | 150 days | 170 days |
| 28°F | 152 days | 173 days | 194 days |
| 24°F | 178 days | 197 days | 217 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 |
|---|---|---|---|
| 54474 | 5a | -20 to -15°F | 6 km |
| 54401 | 4b | -25 to -20°F | 8 km |
| 54476 | 4b | -25 to -20°F | 9 km |
| 54417 | 4b | -25 to -20°F | 11 km |
| 54403 | 4b | -25 to -20°F | 13 km |
| 54471 | 4b | -25 to -20°F | 16 km |
| 54448 | 4b | -25 to -20°F | 16 km |
| 54455 | 5a | -20 to -15°F | 18 km |
| 54426 | 4b | -25 to -20°F | 29 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 USW00014897, at 44.9258, -89.6256, elevation 360 m (1,181 ft).
- Data quality: Standard (24+ years of data), 29 years of freeze data.
- Average days per year at or below 32°F: 163.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Merrill (28 km)
- Rosholt 9 NNE (36 km)
- Stevens Point (46 km)
- Antigo (48 km)
- Marshfield Exp. Farm (51 km)
- Marshfield Muni Airport (55 km)
- Stockbridge-Munsee Rsvn (57 km)
- Medford (61 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.