Frost dates for 58740Glenburn, ND
The average last spring frost in Glenburn is May 10 and the average first fall frost is October 1, giving a typical growing season of about 144 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 10
- Average first fall frost
- Oct 1
- Growing season
- 144 days
Safer after May 22 (1-in-10 risk)
Possible by Sep 19 (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 6 · May 19 · May 31 | Sep 11 · Sep 22 · Oct 4 | 127 days | 100% |
| Frost / freeze (32°F) | Apr 27 · May 10 · May 22 | Sep 19 · Oct 1 · Oct 14 | 144 days | 100% |
| Hard freeze (28°F) | Apr 15 · Apr 30 · May 14 | Sep 27 · Oct 10 · Oct 23 | 163 days | 100% |
Planting calendar for Glenburn
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 11 |
| 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 21 |
| Summer squash | Sow outdoors | May 26 – Jul 10 |
| Winter squash & pumpkins | Sow outdoors | Jun 9 – Jul 10 |
| Snap beans | Sow outdoors | May 26 – Jul 14 |
| Sweet corn | Sow outdoors | May 26 – Jun 11 |
| 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) | Jun 1 – Jun 11 |
| Broccoli | Transplant outdoors (fall) | Jul 1 – Jul 12 |
| Cabbage | Start seeds indoors (spring) | Mar 12 – Apr 9 |
| Cabbage | Transplant outdoors (spring) | Apr 9 – May 10 |
| Cabbage | Start seeds indoors (fall) | May 22 – Jun 21 |
| Cabbage | Transplant outdoors (fall) | Jun 21 – Jul 22 |
| Leaf lettuce | Sow outdoors (spring) | Apr 9 – Jun 25 |
| Leaf lettuce | Sow outdoors (fall) | Jun 21 – Aug 7 |
| Spinach | Sow outdoors (spring) | Apr 2 – May 16 |
| Spinach | Sow outdoors (fall) | Jul 8 – Aug 12 |
| Radishes | Sow outdoors (spring) | Apr 9 – May 30 |
| Radishes | Sow outdoors (fall) | Jun 21 – Aug 22 |
| Kale | Sow outdoors (spring) | Apr 26 – May 16 |
| Kale | Sow outdoors (fall) | Jun 14 – Jul 22 |
| Carrots | Sow outdoors (spring) | May 10 – Jun 25 |
| Carrots | Sow outdoors (fall) | May 22 – Jul 7 |
| Garlic | Plant outdoors (fall) | Sep 21 – Oct 22 |
Where these dates come from
ZIP code 58740 is matched to the NOAA station Minot Intl Ap, ND, 24.3 km away, at 1,665 ft elevation (100 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Minot Intl Ap, ND (used) | 1,665 ft | May 10 | Oct 1 |
| Foxholm 7 N, ND | 1,675 ft | May 11 | Sep 29 |
| Minot Exp Stn, ND | 1,769 ft | May 13 | Sep 27 |
| Granville, ND | 1,510 ft | May 9 | Oct 1 |
Frost dates near Glenburn
- Minot Afb, ND 58704 · last May 10, first Oct 1
- Deering, ND 58731 · last May 10, first Oct 1
- Minot, ND 58703 · last May 10, first Oct 1
- Lansford, ND 58750 · last May 17, first Sep 23
- Burlington, ND 58722 · last May 10, first Oct 1
- Surrey, ND 58785 · last May 10, first Oct 1
- Norwich, ND 58768 · last May 22, first Sep 22
- Newburg, ND 58762 · last May 15, first Sep 25
Frequently asked questions
- When is the last frost in Glenburn, ND?
- For ZIP code 58740, the average last spring frost (32°F) is May 10, based on NOAA 1991-2020 climate normals for the Minot Intl Ap, ND weather station. There is a 1-in-10 chance of a frost after May 22.
- When is the first frost in Glenburn, ND?
- The average first fall frost (32°F) is October 1. There is a 1-in-10 chance of frost by September 19, so tender plants are at risk from that point on.
- How long is the growing season in 58740?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 144 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.