Frost dates for Bridgeport 18wsw, NE
At Bridgeport 18wsw, the median last spring frost (32°F) is May 19 and the median first fall frost is Sep 23, for a typical growing season of 126 days. For a 90% chance that the last frost has passed, wait until Jun 3. Nearby ZIP codes are in USDA hardiness zones 5a to 5b.
- May 19Last spring frost (median)50% chance of 32°F after this date
- Jun 3Safer planting date10% chance of 32°F after this date
- Sep 23First fall frost (median)50% chance of 32°F by this date
- 126 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 17 | May 31 | Jun 15 |
| 32°F | May 7 | May 19 | Jun 3 |
| 28°F | Apr 28 | May 9 | May 23 |
| 24°F | Apr 16 | Apr 30 | May 13 |
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 | Aug 28 | Sep 14 | Sep 26 |
| 32°F | Sep 6 | Sep 23 | Oct 5 |
| 28°F | Sep 16 | Oct 3 | Oct 15 |
| 24°F | Sep 27 | Oct 11 | Oct 23 |
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 | 84 days | 106 days | 125 days |
| 32°F | 105 days | 126 days | 144 days |
| 28°F | 126 days | 144 days | 161 days |
| 24°F | 145 days | 163 days | 181 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 |
|---|---|---|---|
| 69336 | 5a | -20 to -15°F | 18 km |
| 69355 | 5a | -20 to -15°F | 27 km |
| 69345 | 5a | -20 to -15°F | 29 km |
| 69334 | 5a | -20 to -15°F | 29 km |
| 69156 | 5b | -15 to -10°F | 32 km |
| 69341 | 5b | -15 to -10°F | 32 km |
| 69131 | 5b | -15 to -10°F | 35 km |
| 69356 | 5a | -20 to -15°F | 37 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 USC00251149, at 41.5639, -103.3678, elevation 1265 m (4,149 ft).
- Data quality: Representative (10+ years), 14 years of freeze data.
- Average days per year at or below 32°F: 183.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Bridgeport (25 km)
- Dalton (38 km)
- Scottsbluff Heilig Airport (39 km)
- Broadwater 3wnw (39 km)
- Scottsbluff 1e (40 km)
- Minatare Dam (usbr) (41 km)
- Kimball 2ne (42 km)
- Sidney 6 NNW (47 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.