Frost dates for 58060Milnor, ND
The average last spring frost in Milnor is May 7 and the average first fall frost is October 1, giving a typical growing season of about 146 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 7
- Average first fall frost
- Oct 1
- Growing season
- 146 days
Safer after May 20 (1-in-10 risk)
Possible by Sep 18 (1-in-10 risk)
Last frost typically in 193 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 4 · May 17 · May 30 | Sep 10 · Sep 22 · Oct 3 | 127 days | 100% |
| Frost / freeze (32°F) | Apr 24 · May 7 · May 20 | Sep 18 · Oct 1 · Oct 13 | 146 days | 100% |
| Hard freeze (28°F) | Apr 15 · Apr 29 · May 12 | Sep 27 · Oct 9 · Oct 23 | 164 days | 100% |
Planting calendar for Milnor
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 6 – Jun 12 |
| Tomatoes | Transplant outdoors | May 23 – Jun 11 |
| Peppers | Start seeds indoors | Apr 6 – May 7 |
| Peppers | Transplant outdoors | Jun 6 – Jul 7 |
| Eggplant | Start seeds indoors | Apr 23 – May 22 |
| Eggplant | Transplant outdoors | Jun 6 – Jul 7 |
| Cucumbers | Sow outdoors | Jun 6 – Jun 21 |
| Summer squash | Sow outdoors | May 23 – Jul 7 |
| Winter squash & pumpkins | Sow outdoors | Jun 6 – Jul 7 |
| Snap beans | Sow outdoors | May 23 – Jul 14 |
| Sweet corn | Sow outdoors | May 23 – Jun 11 |
| Watermelon & cantaloupe | Sow outdoors | Jun 6 – Jul 7 |
| Okra | Sow outdoors | May 30 – Jun 22 |
| Peas | Sow outdoors (spring) | Apr 6 – May 22 |
| Potatoes | Plant outdoors (spring) | Apr 6 – Jun 6 |
| Onions | Start seeds indoors (spring) | Feb 23 – Mar 22 |
| Onions | Transplant outdoors (spring) | Apr 23 – May 22 |
| Broccoli | Start seeds indoors (spring) | Mar 19 – Apr 22 |
| Broccoli | Transplant outdoors (spring) | Apr 23 – May 22 |
| Broccoli | Start seeds indoors (fall) | Jun 1 – Jun 11 |
| Broccoli | Transplant outdoors (fall) | Jul 1 – Jul 12 |
| Cabbage | Start seeds indoors (spring) | Mar 9 – Apr 6 |
| Cabbage | Transplant outdoors (spring) | Apr 6 – May 7 |
| Cabbage | Start seeds indoors (fall) | May 22 – Jun 21 |
| Cabbage | Transplant outdoors (fall) | Jun 21 – Jul 22 |
| Leaf lettuce | Sow outdoors (spring) | Apr 6 – Jun 22 |
| Leaf lettuce | Sow outdoors (fall) | Jun 21 – Aug 7 |
| Spinach | Sow outdoors (spring) | Mar 30 – May 13 |
| Spinach | Sow outdoors (fall) | Jul 8 – Aug 12 |
| Radishes | Sow outdoors (spring) | Apr 6 – May 27 |
| Radishes | Sow outdoors (fall) | Jun 21 – Aug 22 |
| Kale | Sow outdoors (spring) | Apr 23 – May 13 |
| Kale | Sow outdoors (fall) | Jun 14 – Jul 22 |
| Carrots | Sow outdoors (spring) | May 7 – Jun 22 |
| Carrots | Sow outdoors (fall) | May 22 – Jul 7 |
| Garlic | Plant outdoors (fall) | Sep 21 – Oct 22 |
Where these dates come from
ZIP code 58060 is matched to the NOAA station Forman 5 Sse, ND, 20.7 km away, at 1,250 ft elevation (75 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Forman 5 Sse, ND (used) | 1,250 ft | May 7 | Oct 1 |
| Mc Leod 3 E, ND | 1,075 ft | May 6 | Sep 29 |
| Lidgerwood, ND | 1,125 ft | May 2 | Oct 6 |
| Lisbon, ND | 1,149 ft | May 12 | Sep 27 |
Frost dates near Milnor
- Cayuga, ND 58013 · last May 2, first Oct 6
- Gwinner, ND 58040 · last May 7, first Oct 1
- Rutland, ND 58067 · last May 7, first Oct 1
- Forman, ND 58032 · last May 7, first Oct 1
- Mcleod, ND 58057 · last May 6, first Sep 29
- Lidgerwood, ND 58053 · last May 2, first Oct 6
- Stirum, ND 58069 · last May 8, first Sep 28
- Havana, ND 58043 · last May 7, first Oct 1
Frequently asked questions
- When is the last frost in Milnor, ND?
- For ZIP code 58060, the average last spring frost (32°F) is May 7, based on NOAA 1991-2020 climate normals for the Forman 5 Sse, ND weather station. There is a 1-in-10 chance of a frost after May 20.
- When is the first frost in Milnor, ND?
- The average first fall frost (32°F) is October 1. There is a 1-in-10 chance of frost by September 18, so tender plants are at risk from that point on.
- How long is the growing season in 58060?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 146 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.