Frost dates for Mohall, ND
At Mohall, the median last spring frost (32°F) is May 17 and the median first fall frost is Sep 23, for a typical growing season of 127 days. For a 90% chance that the last frost has passed, wait until May 30. Nearby ZIP codes are in USDA hardiness zones 3b to 4a.
- May 17Last spring frost (median)50% chance of 32°F after this date
- May 30Safer planting date10% chance of 32°F after this date
- Sep 23First fall frost (median)50% chance of 32°F by this date
- 127 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 15 | May 26 | Jun 7 |
| 32°F | May 6 | May 17 | May 30 |
| 28°F | Apr 26 | May 9 | May 23 |
| 24°F | Apr 14 | Apr 30 | May 15 |
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 2 | Sep 15 | Sep 26 |
| 32°F | Sep 11 | Sep 23 | Oct 5 |
| 28°F | Sep 18 | Oct 1 | Oct 14 |
| 24°F | Sep 25 | Oct 10 | Oct 24 |
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 | 92 days | 110 days | 127 days |
| 32°F | 111 days | 127 days | 142 days |
| 28°F | 125 days | 143 days | 161 days |
| 24°F | 141 days | 163 days | 184 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 |
|---|---|---|---|
| 58761 | 4a | -30 to -25°F | 3 km |
| 58750 | 4a | -30 to -25°F | 18 km |
| 58787 | 4a | -30 to -25°F | 22 km |
| 58782 | 3b | -35 to -30°F | 25 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 USC00326025, at 48.7603, -101.5089, elevation 500 m (1,641 ft).
- Data quality: Representative (10+ years), 26 years of freeze data.
- Average days per year at or below 32°F: 197.
- Frost risk changes over short distances. Valleys and low spots freeze earlier than hillsides and city centers.
Nearby weather stations
- Foxholm 7 N (34 km)
- Westhope (40 km)
- Kenmare 1 WSW (44 km)
- Northgate 5 ESE (54 km)
- Minot Intl Airport (59 km)
- Upham 3 N (60 km)
- Minot Exp. Station (66 km)
- Granville (73 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.