Frost dates for Beaconsfield, IA
At Beaconsfield, the median last spring frost (32°F) is Apr 23 and the median first fall frost is Oct 17, for a typical growing season of 176 days. For a 90% chance that the last frost has passed, wait until May 6. Nearby ZIP codes are in USDA hardiness zone 5b.
- Apr 23Last spring frost (median)50% chance of 32°F after this date
- May 6Safer planting date10% chance of 32°F after this date
- Oct 17First fall frost (median)50% chance of 32°F by this date
- 176 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 19 | May 3 | May 16 |
| 32°F | Apr 7 | Apr 23 | May 6 |
| 28°F | Mar 30 | Apr 12 | Apr 27 |
| 24°F | Mar 19 | Apr 3 | Apr 19 |
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 23 | Oct 7 | Oct 21 |
| 32°F | Oct 1 | Oct 17 | Oct 31 |
| 28°F | Oct 12 | Oct 28 | Nov 8 |
| 24°F | Oct 22 | Nov 4 | 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 | 157 days | 177 days |
| 32°F | 155 days | 176 days | 195 days |
| 28°F | 177 days | 196 days | 217 days |
| 24°F | 194 days | 215 days | 236 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 |
|---|---|---|---|
| 50074 | 5b | -15 to -10°F | 7 km |
| 50108 | 5b | -15 to -10°F | 7 km |
| 50133 | 5b | -15 to -10°F | 10 km |
| 50863 | 5b | -15 to -10°F | 12 km |
| 50254 | 5b | -15 to -10°F | 21 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 USC00130536, at 40.8069, -94.0475, elevation 370 m (1,215 ft).
- Data quality: Standard (24+ years of data), 27 years of freeze data.
- Average days per year at or below 32°F: 142.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Lamoni (18 km)
- Mount Ayr (20 km)
- Lamoni (23 km)
- Lamoni Muni Airport (23 km)
- Osceola (34 km)
- Leon 6 ESE (35 km)
- Creston 2 SW (39 km)
- Winterset 1s (57 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.