Frost dates for Guttenberg L&d 10, IA
At Guttenberg L&d 10, the median last spring frost (32°F) is Apr 21 and the median first fall frost is Oct 18, for a typical growing season of 178 days. For a 90% chance that the last frost has passed, wait until May 6. Nearby ZIP codes are in USDA hardiness zone 5a.
- Apr 21Last spring frost (median)50% chance of 32°F after this date
- May 6Safer planting date10% chance of 32°F after this date
- Oct 18First fall frost (median)50% chance of 32°F by this date
- 178 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 | Apr 18 | May 3 | May 16 |
| 32°F | Apr 7 | Apr 21 | May 6 |
| 28°F | Mar 30 | Apr 9 | Apr 26 |
| 24°F | Mar 15 | Apr 1 | Apr 15 |
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 24 | Oct 7 | Oct 21 |
| 32°F | Oct 4 | Oct 18 | Oct 30 |
| 28°F | Oct 14 | Oct 27 | Nov 8 |
| 24°F | Oct 24 | Nov 5 | Nov 19 |
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 | 138 days | 156 days | 174 days |
| 32°F | 158 days | 178 days | 196 days |
| 28°F | 179 days | 199 days | 218 days |
| 24°F | 200 days | 219 days | 239 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 |
|---|---|---|---|
| 52052 | 5a | -20 to -15°F | 5 km |
| 53810 | 5a | -20 to -15°F | 9 km |
| 52049 | 5a | -20 to -15°F | 14 km |
| 52048 | 5a | -20 to -15°F | 14 km |
| 52035 | 5a | -20 to -15°F | 15 km |
| 52066 | 5a | -20 to -15°F | 15 km |
| 52056 | 5a | -20 to -15°F | 20 km |
| 52065 | 5a | -20 to -15°F | 22 km |
| 52053 | 5a | -20 to -15°F | 23 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 USC00133517, at 42.7858, -91.0958, elevation 188 m (618 ft).
- Data quality: Standard (24+ years of data), 29 years of freeze data.
- Average days per year at or below 32°F: 133.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Elkader 6 SSW (29 km)
- Manchester #2 (45 km)
- Dubuque L&d 11 (46 km)
- Postville (51 km)
- Dubuque Regional Airport (54 km)
- Cascade (55 km)
- Fayette (61 km)
- Waukon (62 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.