Frost dates for Broadwater 10sse, NE
At Broadwater 10sse, the median last spring frost (32°F) is May 7 and the median first fall frost is Oct 9, for a typical growing season of 154 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 7Last spring frost (median)50% chance of 32°F after this date
- May 19Safer planting date10% chance of 32°F after this date
- Oct 9First fall frost (median)50% chance of 32°F by this date
- 154 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 5 | May 16 | May 30 |
| 32°F | Apr 25 | May 7 | May 19 |
| 28°F | Apr 14 | Apr 28 | May 10 |
| 24°F | Apr 1 | Apr 17 | May 2 |
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 17 | Sep 30 | Oct 10 |
| 32°F | Sep 27 | Oct 9 | Oct 20 |
| 28°F | Oct 5 | Oct 17 | Oct 29 |
| 24°F | Oct 12 | Oct 26 | Nov 9 |
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 | 117 days | 135 days | 151 days |
| 32°F | 136 days | 154 days | 169 days |
| 28°F | 154 days | 171 days | 190 days |
| 24°F | 171 days | 192 days | 215 days |
Chance of a freeze in any year
| Temperature | Chance per year |
|---|---|
| 36°F | 100% |
| 32°F | 100% |
| 28°F | 100% |
| 24°F | 100% |
Closest ZIP codes (each is closer to another station)
| ZIP | Hardiness zone | Avg. extreme low | Distance |
|---|---|---|---|
| 69125 | 5a | -20 to -15°F | 16 km |
| 69131 | 5b | -15 to -10°F | 18 km |
| 69141 | 5b | -15 to -10°F | 21 km |
| 69149 | 5b | -15 to -10°F | 27 km |
| 69148 | 5a | -20 to -15°F | 30 km |
| 69154 | 5b | -15 to -10°F | 36 km |
| 69336 | 5a | -20 to -15°F | 37 km |
| 69162 | 5b | -15 to -10°F | 41 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 USC00251190, at 41.4539, -102.7850, elevation 1267 m (4,158 ft).
- Data quality: Estimated from nearby stations (2+ years), 9 years of freeze data.
- Average days per year at or below 32°F: 162.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Dalton (16 km)
- Broadwater 3wnw (20 km)
- Lodgepole 8n (23 km)
- Sidney 6 NNW (32 km)
- Lodgepole No. 2 (36 km)
- Bridgeport (36 km)
- Lodgepole (36 km)
- Oshkosh (37 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.