Frost Dates for Dickinson, ND
In Dickinson, ND, the average last spring frost is around May 20 and the average first fall frost around Sep 22, for a growing season of about 123 days. For frost-tender plants, wait until Jun 1, when the chance of frost drops to 10%.
Based on NOAA 1991–2020 records from the Dickinson, ND weather station, under 1 mile away, elevation 2,460 ft. Frost can come earlier in low spots and valleys and later near cities and large lakes.
Frost probability by date
Chance of a 32°F frost after the spring date, or before the fall date.
| Chance | Last spring frost | First fall frost |
|---|---|---|
| 10% | Jun 1 | Sep 8 |
| 20% | May 28 | Sep 13 |
| 30% | May 25 | Sep 16 |
| 40% | May 23 | Sep 19 |
| 50% | May 20 | Sep 22 |
| 60% | May 17 | Sep 24 |
| 70% | May 15 | Sep 26 |
| 80% | May 12 | Sep 29 |
| 90% | May 8 | Oct 3 |
Light frost vs. hard freeze
Average (50%) dates for each temperature. Tender plants are damaged at 36°F; most hardy crops survive until 28°F.
| Temperature | Last in spring | First in fall |
|---|---|---|
| Light frost (36°F) | May 31 | Sep 12 |
| Frost / freeze (32°F) | May 20 | Sep 22 |
| Hard freeze (28°F) | May 10 | Sep 29 |
Planting calendar for Dickinson
Transplant May 27 – Jun 10
Transplant Jun 3 – Jun 17
Transplant Jun 3 – Jun 17
Transplant May 27 – Jun 10
Sow or transplant May 27 – Jun 10
Sow or transplant May 27 – Jun 10
Sow or transplant Jun 3 – Jun 17
Sow or transplant Apr 22 – May 6
Fall sowing Jul 28 – Aug 25
Fall sowing Jul 28 – Aug 18
Fall sowing Jul 14 – Jul 28
Sow or transplant Apr 22 – May 6
Fall sowing Jul 14 – Aug 11
Transplant May 6 – May 20
Fall sowing Jun 30 – Jul 14
Transplant Apr 29 – May 13
Fall sowing Jun 30 – Jul 14
Fall sowing Jun 30 – Jul 14
Fall sowing Aug 11 – Sep 1
Fall sowing Jul 14 – Jul 28
Plant Apr 22 – May 6
Based on the average last frost (May 20) and first frost (Sep 22). The dashed lines mark those dates. Seed packets list days to maturity; adjust for your varieties.