Frost dates for 58520Almont, ND
The average last spring frost in Almont is May 17 and the average first fall frost is September 21, giving a typical growing season of about 124 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 17
- Average first fall frost
- Sep 21
- Growing season
- 124 days
Safer after Jun 1 (1-in-10 risk)
Possible by Sep 6 (1-in-10 risk)
Last frost typically in 194 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 16 · May 28 · Jun 9 | Aug 26 · Sep 12 · Sep 25 | 105 days | 100% |
| Frost / freeze (32°F) | May 6 · May 17 · Jun 1 | Sep 6 · Sep 21 · Oct 4 | 124 days | 100% |
| Hard freeze (28°F) | Apr 26 · May 8 · May 23 | Sep 12 · Sep 30 · Oct 15 | 142 days | 100% |
Planting calendar for Almont
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 1 |
| 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 11 |
| Summer squash | Sow outdoors | Jun 2 – Jul 17 |
| Winter squash & pumpkins | Sow outdoors | Jun 16 – Jul 17 |
| Snap beans | Sow outdoors | Jun 2 – Jul 4 |
| Sweet corn | Sow outdoors | Jun 2 – Jun 1 |
| 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 22 – Jun 1 |
| Broccoli | Transplant outdoors (fall) | Jun 21 – Jul 2 |
| Cabbage | Start seeds indoors (spring) | Mar 19 – Apr 16 |
| Cabbage | Transplant outdoors (spring) | Apr 16 – May 17 |
| Cabbage | Start seeds indoors (fall) | May 12 – Jun 11 |
| Cabbage | Transplant outdoors (fall) | Jun 11 – Jul 12 |
| Leaf lettuce | Sow outdoors (spring) | Apr 16 – Jul 2 |
| Leaf lettuce | Sow outdoors (fall) | Jun 11 – Jul 28 |
| Spinach | Sow outdoors (spring) | Apr 9 – May 23 |
| Spinach | Sow outdoors (fall) | Jun 28 – Aug 2 |
| Radishes | Sow outdoors (spring) | Apr 16 – Jun 6 |
| Radishes | Sow outdoors (fall) | Jun 11 – Aug 12 |
| Kale | Sow outdoors (spring) | May 3 – May 23 |
| Kale | Sow outdoors (fall) | Jun 4 – Jul 12 |
| Carrots | Sow outdoors (spring) | May 17 – Jul 2 |
| Carrots | Sow outdoors (fall) | May 12 – Jun 27 |
| Garlic | Plant outdoors (fall) | Sep 11 – Oct 12 |
Where these dates come from
ZIP code 58520 is matched to the NOAA station Almont, ND, 2.6 km away, at 1,915 ft elevation (168 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Almont, ND (used) | 1,915 ft | May 17 | Sep 21 |
| New Salem 5Nw, ND | 2,150 ft | May 18 | Sep 24 |
| Heart Butte Dam, ND | 2,134 ft | May 14 | Sep 29 |
| Carson, ND | 2,335 ft | May 19 | Sep 25 |
Frost dates near Almont
- New Salem, ND 58563 · last May 18, first Sep 24
- Flasher, ND 58535 · last May 13, first Sep 27
- Glen Ullin, ND 58631 · last May 19, first Sep 21
- Carson, ND 58529 · last May 19, first Sep 25
- Elgin, ND 58533 · last May 20, first Sep 23
- Hebron, ND 58638 · last May 19, first Sep 21
- Raleigh, ND 58564 · last May 13, first Sep 27
- Mandan, ND 58554 · last May 13, first Sep 27
Frequently asked questions
- When is the last frost in Almont, ND?
- For ZIP code 58520, the average last spring frost (32°F) is May 17, based on NOAA 1991-2020 climate normals for the Almont, ND weather station. There is a 1-in-10 chance of a frost after June 1.
- When is the first frost in Almont, ND?
- The average first fall frost (32°F) is September 21. There is a 1-in-10 chance of frost by September 6, so tender plants are at risk from that point on.
- How long is the growing season in 58520?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 124 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.