Frost dates for Fargo 3s, ND
At Fargo 3s, the median last spring frost (32°F) is May 4 and the median first fall frost is Oct 2, for a typical growing season of 151 days. For a 90% chance that the last frost has passed, wait until May 18. Nearby ZIP codes are in USDA hardiness zone 4a.
- May 4Last spring frost (median)50% chance of 32°F after this date
- May 18Safer planting date10% chance of 32°F after this date
- Oct 2First fall frost (median)50% chance of 32°F by this date
- 151 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 2 | May 13 | May 26 |
| 32°F | Apr 21 | May 4 | May 18 |
| 28°F | Apr 10 | Apr 25 | May 9 |
| 24°F | Apr 2 | Apr 16 | Apr 30 |
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 12 | Sep 24 | Oct 5 |
| 32°F | Sep 22 | Oct 2 | Oct 15 |
| 28°F | Sep 29 | Oct 12 | Oct 26 |
| 24°F | Oct 7 | Oct 23 | Nov 6 |
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 | 114 days | 132 days | 149 days |
| 32°F | 133 days | 151 days | 167 days |
| 28°F | 152 days | 170 days | 188 days |
| 24°F | 169 days | 188 days | 210 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 |
|---|---|---|---|
| 58103 | 4a | -30 to -25°F | 4 km |
| 56560 | 4a | -30 to -25°F | 5 km |
| 58104 | 4a | -30 to -25°F | 5 km |
| 58047 | 4a | -30 to -25°F | 14 km |
| 56525 | 4a | -30 to -25°F | 18 km |
| 56580 | 4a | -30 to -25°F | 18 km |
| 58015 | 4a | -30 to -25°F | 26 km |
| 58051 | 4a | -30 to -25°F | 27 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 USC00322860, at 46.8292, -96.7961, elevation 277 m (908 ft).
- Data quality: Estimated from nearby stations (2+ years), 4 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
- Fargo Hector Intl Airport (11 km)
- Casselton Agronomy Farm (34 km)
- Mc Leod 3 E (59 km)
- Enderlin 2w (68 km)
- Hillsboro 3 N (71 km)
- Colgate (80 km)
- Lisbon (81 km)
- Mayville (85 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.