Frost dates for Tioga 1e, ND
At Tioga 1e, the median last spring frost (32°F) is May 11 and the median first fall frost is Sep 26, for a typical growing season of 136 days. For a 90% chance that the last frost has passed, wait until May 24. Nearby ZIP codes are in USDA hardiness zones 3b to 4a.
- May 11Last spring frost (median)50% chance of 32°F after this date
- May 24Safer planting date10% chance of 32°F after this date
- Sep 26First fall frost (median)50% chance of 32°F by this date
- 136 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 9 | May 21 | Jun 3 |
| 32°F | Apr 30 | May 11 | May 24 |
| 28°F | Apr 16 | May 2 | May 15 |
| 24°F | Apr 9 | Apr 22 | May 6 |
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 6 | Sep 19 | Sep 30 |
| 32°F | Sep 13 | Sep 26 | Oct 9 |
| 28°F | Sep 20 | Oct 5 | Oct 20 |
| 24°F | Sep 28 | Oct 15 | Oct 31 |
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 | 102 days | 120 days | 137 days |
| 32°F | 118 days | 136 days | 154 days |
| 28°F | 134 days | 155 days | 175 days |
| 24°F | 152 days | 174 days | 196 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 |
|---|---|---|---|
| 58852 | 3b | -35 to -30°F | 2 km |
| 58794 | 4a | -30 to -25°F | 17 km |
| 58849 | 4a | -30 to -25°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 USC00328737, at 48.3989, -102.9181, elevation 684 m (2,245 ft).
- Data quality: Representative (10+ years), 21 years of freeze data.
- Average days per year at or below 32°F: 196.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Powers Lake 1n (28 km)
- Wildrose 3nw (37 km)
- Stanley 3 NNW (38 km)
- Keene 3s (56 km)
- Williston Sloulin Intl Airport (59 km)
- Crosby (64 km)
- Williston Exp. Farm (67 km)
- Kenmare 1 WSW (67 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.