Frost dates for 55702Alborn, MN
The average last spring frost in Alborn is May 29 and the average first fall frost is September 18, giving a typical growing season of about 111 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 29
- Average first fall frost
- Sep 18
- Growing season
- 111 days
Safer after Jun 13 (1-in-10 risk)
Possible by Sep 1 (1-in-10 risk)
Last frost typically in 207 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) | — | — | 85 days | 100% |
| Frost / freeze (32°F) | May 14 · May 29 · Jun 13 | Sep 1 · Sep 18 · Oct 2 | 111 days | 100% |
| Hard freeze (28°F) | Apr 30 · May 16 · May 31 | Sep 12 · Sep 29 · Oct 13 | 133 days | 100% |
Planting calendar for Alborn
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 28 – Jul 4 |
| Tomatoes | Transplant outdoors | Jun 14 – May 29 |
| Peppers | Start seeds indoors | Apr 28 – May 29 |
| Peppers | Transplant outdoors | Jun 28 – Jul 29 |
| Eggplant | Start seeds indoors | May 15 – Jun 13 |
| Eggplant | Transplant outdoors | Jun 28 – Jul 29 |
| Cucumbers | Sow outdoors | Jun 28 – Jun 8 |
| Summer squash | Sow outdoors | Jun 14 – Jul 29 |
| Winter squash & pumpkins | Sow outdoors | Jun 28 – Jul 29 |
| Snap beans | Sow outdoors | Jun 14 – Jul 1 |
| Sweet corn | Sow outdoors | Jun 14 – May 29 |
| Watermelon & cantaloupe | Sow outdoors | Jun 28 – Jul 29 |
| Okra | Sow outdoors | Jun 21 – Jul 14 |
| Peas | Sow outdoors (spring) | Apr 28 – Jun 13 |
| Potatoes | Plant outdoors (spring) | Apr 28 – Jun 28 |
| Onions | Start seeds indoors (spring) | Mar 17 – Apr 13 |
| Onions | Transplant outdoors (spring) | May 15 – Jun 13 |
| Broccoli | Start seeds indoors (spring) | Apr 10 – May 14 |
| Broccoli | Transplant outdoors (spring) | May 15 – Jun 13 |
| Broccoli | Start seeds indoors (fall) | May 19 – May 29 |
| Broccoli | Transplant outdoors (fall) | Jun 18 – Jun 29 |
| Cabbage | Start seeds indoors (spring) | Mar 31 – Apr 28 |
| Cabbage | Transplant outdoors (spring) | Apr 28 – May 29 |
| Cabbage | Start seeds indoors (fall) | May 9 – Jun 8 |
| Cabbage | Transplant outdoors (fall) | Jun 8 – Jul 9 |
| Leaf lettuce | Sow outdoors (spring) | Apr 28 – Jul 14 |
| Leaf lettuce | Sow outdoors (fall) | Jun 8 – Jul 25 |
| Spinach | Sow outdoors (spring) | Apr 21 – Jun 4 |
| Spinach | Sow outdoors (fall) | Jun 25 – Jul 30 |
| Radishes | Sow outdoors (spring) | Apr 28 – Jun 18 |
| Radishes | Sow outdoors (fall) | Jun 8 – Aug 9 |
| Kale | Sow outdoors (spring) | May 15 – Jun 4 |
| Kale | Sow outdoors (fall) | Jun 1 – Jul 9 |
| Carrots | Sow outdoors (spring) | May 29 – Jul 14 |
| Carrots | Sow outdoors (fall) | May 9 – Jun 24 |
| Garlic | Plant outdoors (fall) | Sep 8 – Oct 9 |
Where these dates come from
ZIP code 55702 is matched to the NOAA station Floodwood 3 Ne, MN, 23.7 km away, at 1,260 ft elevation (89 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Floodwood 3 Ne, MN (used) | 1,260 ft | May 29 | Sep 18 |
| Cotton, MN | 1,323 ft | May 27 | Sep 20 |
| Cloquet, MN | 1,265 ft | May 26 | Sep 23 |
| Duluth Nws, MN | 1,433 ft | May 18 | Oct 1 |
Frost dates near Alborn
- Canyon, MN 55717 · last May 27, first Sep 20
- Saginaw, MN 55779 · last May 13, first Oct 1
- Brookston, MN 55711 · last May 26, first Sep 23
- Twig, MN 55791 · last May 13, first Oct 1
- Cotton, MN 55724 · last May 27, first Sep 20
- Meadowlands, MN 55765 · last May 29, first Sep 18
- Cloquet, MN 55720 · last May 26, first Sep 23
- Floodwood, MN 55736 · last May 29, first Sep 18
Frequently asked questions
- When is the last frost in Alborn, MN?
- For ZIP code 55702, the average last spring frost (32°F) is May 29, based on NOAA 1991-2020 climate normals for the Floodwood 3 Ne, MN weather station. There is a 1-in-10 chance of a frost after June 13.
- When is the first frost in Alborn, MN?
- The average first fall frost (32°F) is September 18. There is a 1-in-10 chance of frost by September 1, so tender plants are at risk from that point on.
- How long is the growing season in 55702?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 111 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.