Frost dates for New London, WI
At New London, the median last spring frost (32°F) is May 4 and the median first fall frost is Oct 6, for a typical growing season of 153 days. For a 90% chance that the last frost has passed, wait until May 19. Nearby ZIP codes are in USDA hardiness zones 5a to 5b.
- May 4Last spring frost (median)50% chance of 32°F after this date
- May 19Safer planting date10% chance of 32°F after this date
- Oct 6First fall frost (median)50% chance of 32°F by this date
- 153 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 3 | May 17 | Jun 1 |
| 32°F | Apr 21 | May 4 | May 19 |
| 28°F | Apr 8 | Apr 24 | May 9 |
| 24°F | Mar 30 | Apr 12 | Apr 27 |
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 14 | Sep 26 | Oct 9 |
| 32°F | Sep 22 | Oct 6 | Oct 22 |
| 28°F | Oct 1 | Oct 18 | Nov 3 |
| 24°F | Oct 14 | Nov 1 | Nov 15 |
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 | 131 days | 151 days |
| 32°F | 135 days | 153 days | 172 days |
| 28°F | 154 days | 176 days | 198 days |
| 24°F | 180 days | 202 days | 222 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 |
|---|---|---|---|
| 54961 | 5a | -20 to -15°F | 7 km |
| 54944 | 5a | -20 to -15°F | 8 km |
| 54931 | 5a | -20 to -15°F | 11 km |
| 54947 | 5b | -15 to -10°F | 17 km |
| 54940 | 5a | -20 to -15°F | 18 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 USC00475932, at 44.3586, -88.7189, elevation 244 m (800 ft).
- Data quality: Standard (24+ years of data), 25 years of freeze data.
- Average days per year at or below 32°F: 164.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Appleton (24 km)
- Waupaca (27 km)
- Clintonville (29 km)
- Oshkosh (40 km)
- Oshkosh Wittman Airport (44 km)
- Berlin Wastewater Plant (45 km)
- Shawano 2ssw (46 km)
- Green Bay WFO (51 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.