Frost dates for 58770Parshall, ND
The average last spring frost in Parshall is May 17 and the average first fall frost is September 23, giving a typical growing season of about 127 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 17
- Average first fall frost
- Sep 23
- Growing season
- 127 days
Safer after May 29 (1-in-10 risk)
Possible by Sep 12 (1-in-10 risk)
Last frost typically in 202 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 15 · May 27 · Jun 9 | Sep 2 · Sep 15 · Sep 25 | 109 days | 100% |
| Frost / freeze (32°F) | May 7 · May 17 · May 29 | Sep 12 · Sep 23 · Oct 3 | 127 days | 100% |
| Hard freeze (28°F) | Apr 26 · May 8 · May 19 | Sep 19 · Sep 30 · Oct 14 | 145 days | 100% |
Planting calendar for Parshall
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 16 – Jun 22 |
| Tomatoes | Transplant outdoors | Jun 2 – Jun 3 |
| Peppers | Start seeds indoors | Apr 16 – May 17 |
| Peppers | Transplant outdoors | Jun 16 – Jul 17 |
| Eggplant | Start seeds indoors | May 3 – Jun 1 |
| Eggplant | Transplant outdoors | Jun 16 – Jul 17 |
| Cucumbers | Sow outdoors | Jun 16 – Jun 13 |
| Summer squash | Sow outdoors | Jun 2 – Jul 17 |
| Winter squash & pumpkins | Sow outdoors | Jun 16 – Jul 17 |
| Snap beans | Sow outdoors | Jun 2 – Jul 6 |
| Sweet corn | Sow outdoors | Jun 2 – Jun 3 |
| Watermelon & cantaloupe | Sow outdoors | Jun 16 – Jul 17 |
| Okra | Sow outdoors | Jun 9 – Jul 2 |
| Peas | Sow outdoors (spring) | Apr 16 – Jun 1 |
| Potatoes | Plant outdoors (spring) | Apr 16 – Jun 16 |
| Onions | Start seeds indoors (spring) | Mar 5 – Apr 1 |
| Onions | Transplant outdoors (spring) | May 3 – Jun 1 |
| Broccoli | Start seeds indoors (spring) | Mar 29 – May 2 |
| Broccoli | Transplant outdoors (spring) | May 3 – Jun 1 |
| Broccoli | Start seeds indoors (fall) | May 24 – Jun 3 |
| Broccoli | Transplant outdoors (fall) | Jun 23 – Jul 4 |
| Cabbage | Start seeds indoors (spring) | Mar 19 – Apr 16 |
| Cabbage | Transplant outdoors (spring) | Apr 16 – May 17 |
| Cabbage | Start seeds indoors (fall) | May 14 – Jun 13 |
| Cabbage | Transplant outdoors (fall) | Jun 13 – Jul 14 |
| Leaf lettuce | Sow outdoors (spring) | Apr 16 – Jul 2 |
| Leaf lettuce | Sow outdoors (fall) | Jun 13 – Jul 30 |
| Spinach | Sow outdoors (spring) | Apr 9 – May 23 |
| Spinach | Sow outdoors (fall) | Jun 30 – Aug 4 |
| Radishes | Sow outdoors (spring) | Apr 16 – Jun 6 |
| Radishes | Sow outdoors (fall) | Jun 13 – Aug 14 |
| Kale | Sow outdoors (spring) | May 3 – May 23 |
| Kale | Sow outdoors (fall) | Jun 6 – Jul 14 |
| Carrots | Sow outdoors (spring) | May 17 – Jul 2 |
| Carrots | Sow outdoors (fall) | May 14 – Jun 29 |
| Garlic | Plant outdoors (fall) | Sep 13 – Oct 14 |
Where these dates come from
ZIP code 58770 is matched to the NOAA station Stanley 3 Nnw, ND, 48.8 km away, at 2,280 ft elevation (321 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Stanley 3 Nnw, ND (used) | 2,280 ft | May 17 | Sep 23 |
| Keene 3S, ND | 2,470 ft | May 20 | Sep 20 |
| Garrison, ND | 1,910 ft | May 14 | Sep 26 |
| Garrison, ND | 1,932 ft | May 12 | Sep 30 |
Frost dates near Parshall
- Plaza, ND 58771 · last May 10, first Sep 28
- New Town, ND 58763 · last May 17, first Sep 23
- Makoti, ND 58756 · last May 10, first Sep 28
- Ryder, ND 58779 · last May 10, first Sep 28
- Roseglen, ND 58775 · last May 14, first Sep 26
- Palermo, ND 58769 · last May 17, first Sep 23
- Mandaree, ND 58757 · last May 20, first Sep 20
- Stanley, ND 58784 · last May 17, first Sep 23
Frequently asked questions
- When is the last frost in Parshall, ND?
- For ZIP code 58770, the average last spring frost (32°F) is May 17, based on NOAA 1991-2020 climate normals for the Stanley 3 Nnw, ND weather station. There is a 1-in-10 chance of a frost after May 29.
- When is the first frost in Parshall, ND?
- The average first fall frost (32°F) is September 23. There is a 1-in-10 chance of frost by September 12, so tender plants are at risk from that point on.
- How long is the growing season in 58770?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 127 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.