Frost dates for 58771Plaza, ND
The average last spring frost in Plaza is May 10 and the average first fall frost is September 28, giving a typical growing season of about 141 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 10
- Average first fall frost
- Sep 28
- Growing season
- 141 days
Safer after May 25 (1-in-10 risk)
Possible by Sep 15 (1-in-10 risk)
Last frost typically in 195 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 7 · May 19 · Jun 1 | Sep 10 · Sep 22 · Oct 2 | 125 days | 100% |
| Frost / freeze (32°F) | Apr 29 · May 10 · May 25 | Sep 15 · Sep 28 · Oct 11 | 141 days | 100% |
| Hard freeze (28°F) | Apr 15 · May 2 · May 15 | Sep 23 · Oct 6 · Oct 20 | 158 days | 100% |
Planting calendar for Plaza
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 9 – Jun 15 |
| Tomatoes | Transplant outdoors | May 26 – Jun 8 |
| Peppers | Start seeds indoors | Apr 9 – May 10 |
| Peppers | Transplant outdoors | Jun 9 – Jul 10 |
| Eggplant | Start seeds indoors | Apr 26 – May 25 |
| Eggplant | Transplant outdoors | Jun 9 – Jul 10 |
| Cucumbers | Sow outdoors | Jun 9 – Jun 18 |
| Summer squash | Sow outdoors | May 26 – Jul 10 |
| Winter squash & pumpkins | Sow outdoors | Jun 9 – Jul 10 |
| Snap beans | Sow outdoors | May 26 – Jul 11 |
| Sweet corn | Sow outdoors | May 26 – Jun 8 |
| Watermelon & cantaloupe | Sow outdoors | Jun 9 – Jul 10 |
| Okra | Sow outdoors | Jun 2 – Jun 25 |
| Peas | Sow outdoors (spring) | Apr 9 – May 25 |
| Potatoes | Plant outdoors (spring) | Apr 9 – Jun 9 |
| Onions | Start seeds indoors (spring) | Feb 26 – Mar 25 |
| Onions | Transplant outdoors (spring) | Apr 26 – May 25 |
| Broccoli | Start seeds indoors (spring) | Mar 22 – Apr 25 |
| Broccoli | Transplant outdoors (spring) | Apr 26 – May 25 |
| Broccoli | Start seeds indoors (fall) | May 29 – Jun 8 |
| Broccoli | Transplant outdoors (fall) | Jun 28 – Jul 9 |
| Cabbage | Start seeds indoors (spring) | Mar 12 – Apr 9 |
| Cabbage | Transplant outdoors (spring) | Apr 9 – May 10 |
| Cabbage | Start seeds indoors (fall) | May 19 – Jun 18 |
| Cabbage | Transplant outdoors (fall) | Jun 18 – Jul 19 |
| Leaf lettuce | Sow outdoors (spring) | Apr 9 – Jun 25 |
| Leaf lettuce | Sow outdoors (fall) | Jun 18 – Aug 4 |
| Spinach | Sow outdoors (spring) | Apr 2 – May 16 |
| Spinach | Sow outdoors (fall) | Jul 5 – Aug 9 |
| Radishes | Sow outdoors (spring) | Apr 9 – May 30 |
| Radishes | Sow outdoors (fall) | Jun 18 – Aug 19 |
| Kale | Sow outdoors (spring) | Apr 26 – May 16 |
| Kale | Sow outdoors (fall) | Jun 11 – Jul 19 |
| Carrots | Sow outdoors (spring) | May 10 – Jun 25 |
| Carrots | Sow outdoors (fall) | May 19 – Jul 4 |
| Garlic | Plant outdoors (fall) | Sep 18 – Oct 19 |
Where these dates come from
ZIP code 58771 is matched to the NOAA station Max, ND, 54.9 km away, at 2,110 ft elevation (17 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Max, ND (used) | 2,110 ft | May 10 | Sep 28 |
| Stanley 3 Nnw, ND | 2,280 ft | May 17 | Sep 23 |
| Minot Exp Stn, ND | 1,769 ft | May 13 | Sep 27 |
| Foxholm 7 N, ND | 1,675 ft | May 11 | Sep 29 |
Frost dates near Plaza
- Makoti, ND 58756 · last May 10, first Sep 28
- Parshall, ND 58770 · last May 17, first Sep 23
- Ryder, ND 58779 · last May 10, first Sep 28
- Berthold, ND 58718 · last May 11, first Sep 29
- Roseglen, ND 58775 · last May 14, first Sep 26
- Douglas, ND 58735 · last May 10, first Sep 28
- New Town, ND 58763 · last May 17, first Sep 23
- Des Lacs, ND 58733 · last May 13, first Sep 27
Frequently asked questions
- When is the last frost in Plaza, ND?
- For ZIP code 58771, the average last spring frost (32°F) is May 10, based on NOAA 1991-2020 climate normals for the Max, ND weather station. There is a 1-in-10 chance of a frost after May 25.
- When is the first frost in Plaza, ND?
- The average first fall frost (32°F) is September 28. There is a 1-in-10 chance of frost by September 15, so tender plants are at risk from that point on.
- How long is the growing season in 58771?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 141 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.