Frost dates for 58626Dunn Center, ND
The average last spring frost in Dunn Center is May 20 and the average first fall frost is September 21, giving a typical growing season of about 125 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 20
- Average first fall frost
- Sep 21
- Growing season
- 125 days
Safer after Jun 1 (1-in-10 risk)
Possible by Sep 7 (1-in-10 risk)
Last frost typically in 205 days
Frost risk by date
NOAA reports frost dates as probabilities. The middle date is the average (a 50% chance). For spring, the 10% date is a safer planting date: frost after it happens in about 1 year in 10. Light frost (36°F) can damage tender plants; a hard freeze (28°F) kills most annuals.
| Temperature | Last spring: 90% / 50% / 10% chance | First fall: 10% / 50% / 90% chance | Growing season (50%) | Years with at least one |
|---|---|---|---|---|
| Light frost (36°F) | May 17 · May 29 · Jun 17 | Aug 27 · Sep 13 · Sep 25 | 104 days | 100% |
| Frost / freeze (32°F) | May 7 · May 20 · Jun 1 | Sep 7 · Sep 21 · Oct 3 | 125 days | 100% |
| Hard freeze (28°F) | Apr 27 · May 9 · May 24 | Sep 16 · Sep 30 · Oct 13 | 143 days | 100% |
Planting calendar for Dunn Center
Planting windows from the University of Maryland Extension calendar, shifted to your average frost dates. Use them as a starting point and adjust for seed packet instructions and local conditions.
| Crop | Task | Window |
|---|---|---|
| Tomatoes | Start seeds indoors | Apr 19 – Jun 25 |
| Tomatoes | Transplant outdoors | Jun 5 – Jun 1 |
| Peppers | Start seeds indoors | Apr 19 – May 20 |
| Peppers | Transplant outdoors | Jun 19 – Jul 20 |
| Eggplant | Start seeds indoors | May 6 – Jun 4 |
| Eggplant | Transplant outdoors | Jun 19 – Jul 20 |
| Cucumbers | Sow outdoors | Jun 19 – Jun 11 |
| Summer squash | Sow outdoors | Jun 5 – Jul 20 |
| Winter squash & pumpkins | Sow outdoors | Jun 19 – Jul 20 |
| Snap beans | Sow outdoors | Jun 5 – Jul 4 |
| Sweet corn | Sow outdoors | Jun 5 – Jun 1 |
| Watermelon & cantaloupe | Sow outdoors | Jun 19 – Jul 20 |
| Okra | Sow outdoors | Jun 12 – Jul 5 |
| Peas | Sow outdoors (spring) | Apr 19 – Jun 4 |
| Potatoes | Plant outdoors (spring) | Apr 19 – Jun 19 |
| Onions | Start seeds indoors (spring) | Mar 8 – Apr 4 |
| Onions | Transplant outdoors (spring) | May 6 – Jun 4 |
| Broccoli | Start seeds indoors (spring) | Apr 1 – May 5 |
| Broccoli | Transplant outdoors (spring) | May 6 – Jun 4 |
| Broccoli | Start seeds indoors (fall) | May 22 – Jun 1 |
| Broccoli | Transplant outdoors (fall) | Jun 21 – Jul 2 |
| Cabbage | Start seeds indoors (spring) | Mar 22 – Apr 19 |
| Cabbage | Transplant outdoors (spring) | Apr 19 – May 20 |
| Cabbage | Start seeds indoors (fall) | May 12 – Jun 11 |
| Cabbage | Transplant outdoors (fall) | Jun 11 – Jul 12 |
| Leaf lettuce | Sow outdoors (spring) | Apr 19 – Jul 5 |
| Leaf lettuce | Sow outdoors (fall) | Jun 11 – Jul 28 |
| Spinach | Sow outdoors (spring) | Apr 12 – May 26 |
| Spinach | Sow outdoors (fall) | Jun 28 – Aug 2 |
| Radishes | Sow outdoors (spring) | Apr 19 – Jun 9 |
| Radishes | Sow outdoors (fall) | Jun 11 – Aug 12 |
| Kale | Sow outdoors (spring) | May 6 – May 26 |
| Kale | Sow outdoors (fall) | Jun 4 – Jul 12 |
| Carrots | Sow outdoors (spring) | May 20 – Jul 5 |
| Carrots | Sow outdoors (fall) | May 12 – Jun 27 |
| Garlic | Plant outdoors (fall) | Sep 11 – Oct 12 |
Where these dates come from
ZIP code 58626 is matched to the NOAA station Dunn Ctr 1E, ND, 2.6 km away, at 2,187 ft elevation (2 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Dunn Ctr 1E, ND (used) | 2,187 ft | May 20 | Sep 21 |
| Killdeer, ND | 2,310 ft | May 21 | Sep 23 |
| Dickinson Rch Hq, ND | 2,380 ft | May 18 | Sep 24 |
| Taylor 7 Nnw, ND | 2,220 ft | May 23 | Sep 20 |
Frost dates near Dunn Center
- Killdeer, ND 58640 · last May 21, first Sep 23
- Halliday, ND 58636 · last May 20, first Sep 21
- Manning, ND 58642 · last May 18, first Sep 24
- Dodge, ND 58625 · last May 20, first Sep 21
- Marshall, ND 58644 · last May 23, first Sep 20
- Mandaree, ND 58757 · last May 20, first Sep 20
- Golden Valley, ND 58541 · last May 21, first Sep 20
- Taylor, ND 58656 · last May 9, first Oct 1
Frequently asked questions
- When is the last frost in Dunn Center, ND?
- For ZIP code 58626, the average last spring frost (32°F) is May 20, based on NOAA 1991-2020 climate normals for the Dunn Ctr 1E, ND weather station. There is a 1-in-10 chance of a frost after June 1.
- When is the first frost in Dunn Center, ND?
- The average first fall frost (32°F) is September 21. There is a 1-in-10 chance of frost by September 7, so tender plants are at risk from that point on.
- How long is the growing season in 58626?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 125 days long.
- Are these frost dates a forecast?
- No. They are 30-year averages and probabilities from NOAA weather station records. Use them to plan, then watch your local forecast before planting tender crops or leaving them uncovered.