Frost dates for 56033Frost, MN
The average last spring frost in Frost is April 30 and the average first fall frost is October 6, giving a typical growing season of about 158 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 30
- Average first fall frost
- Oct 6
- Growing season
- 158 days
Safer after May 14 (1-in-10 risk)
Possible by Sep 24 (1-in-10 risk)
Last frost typically in 185 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) | Apr 28 · May 10 · May 24 | Sep 16 · Sep 29 · Oct 11 | 141 days | 100% |
| Frost / freeze (32°F) | Apr 16 · Apr 30 · May 14 | Sep 24 · Oct 6 · Oct 20 | 158 days | 100% |
| Hard freeze (28°F) | Apr 5 · Apr 20 · May 6 | Oct 1 · Oct 17 · Oct 31 | 177 days | 100% |
Planting calendar for Frost
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 | Mar 30 – Jun 5 |
| Tomatoes | Transplant outdoors | May 16 – Jun 16 |
| Peppers | Start seeds indoors | Mar 30 – Apr 30 |
| Peppers | Transplant outdoors | May 30 – Jun 30 |
| Eggplant | Start seeds indoors | Apr 16 – May 15 |
| Eggplant | Transplant outdoors | May 30 – Jun 30 |
| Cucumbers | Sow outdoors | May 30 – Jun 26 |
| Summer squash | Sow outdoors | May 16 – Jun 30 |
| Winter squash & pumpkins | Sow outdoors | May 30 – Jun 30 |
| Snap beans | Sow outdoors | May 16 – Jul 19 |
| Sweet corn | Sow outdoors | May 16 – Jun 16 |
| Watermelon & cantaloupe | Sow outdoors | May 30 – Jun 30 |
| Okra | Sow outdoors | May 23 – Jun 15 |
| Peas | Sow outdoors (spring) | Mar 30 – May 15 |
| Potatoes | Plant outdoors (spring) | Mar 30 – May 30 |
| Onions | Start seeds indoors (spring) | Feb 16 – Mar 15 |
| Onions | Transplant outdoors (spring) | Apr 16 – May 15 |
| Broccoli | Start seeds indoors (spring) | Mar 12 – Apr 15 |
| Broccoli | Transplant outdoors (spring) | Apr 16 – May 15 |
| Broccoli | Start seeds indoors (fall) | Jun 6 – Jun 16 |
| Broccoli | Transplant outdoors (fall) | Jul 6 – Jul 17 |
| Cabbage | Start seeds indoors (spring) | Mar 2 – Mar 30 |
| Cabbage | Transplant outdoors (spring) | Mar 30 – Apr 30 |
| Cabbage | Start seeds indoors (fall) | May 27 – Jun 26 |
| Cabbage | Transplant outdoors (fall) | Jun 26 – Jul 27 |
| Leaf lettuce | Sow outdoors (spring) | Mar 30 – Jun 15 |
| Leaf lettuce | Sow outdoors (fall) | Jun 26 – Aug 12 |
| Spinach | Sow outdoors (spring) | Mar 23 – May 6 |
| Spinach | Sow outdoors (fall) | Jul 13 – Aug 17 |
| Radishes | Sow outdoors (spring) | Mar 30 – May 20 |
| Radishes | Sow outdoors (fall) | Jun 26 – Aug 27 |
| Kale | Sow outdoors (spring) | Apr 16 – May 6 |
| Kale | Sow outdoors (fall) | Jun 19 – Jul 27 |
| Carrots | Sow outdoors (spring) | Apr 30 – Jun 15 |
| Carrots | Sow outdoors (fall) | May 27 – Jul 12 |
| Garlic | Plant outdoors (fall) | Sep 26 – Oct 27 |
Where these dates come from
ZIP code 56033 is matched to the NOAA station Wells, MN, 25.9 km away, at 1,135 ft elevation (13 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Wells, MN (used) | 1,135 ft | Apr 30 | Oct 6 |
| Winnebago, MN | 1,110 ft | Apr 27 | Oct 10 |
| Swea City 5N, IA | 1,180 ft | May 4 | Oct 1 |
| Forest City 2 Nne, IA | 1,280 ft | Apr 30 | Oct 7 |
Frost dates near Frost
- Bricelyn, MN 56014 · last Apr 30, first Oct 6
- Rake, IA 50465 · last May 4, first Oct 1
- Elmore, MN 56027 · last May 4, first Oct 1
- Blue Earth, MN 56013 · last Apr 27, first Oct 10
- Kiester, MN 56051 · last Apr 30, first Oct 7
- Buffalo Center, IA 50424 · last Apr 30, first Oct 7
- Ledyard, IA 50556 · last May 4, first Oct 1
- Easton, MN 56025 · last Apr 30, first Oct 6
Frequently asked questions
- When is the last frost in Frost, MN?
- For ZIP code 56033, the average last spring frost (32°F) is April 30, based on NOAA 1991-2020 climate normals for the Wells, MN weather station. There is a 1-in-10 chance of a frost after May 14.
- When is the first frost in Frost, MN?
- The average first fall frost (32°F) is October 6. There is a 1-in-10 chance of frost by September 24, so tender plants are at risk from that point on.
- How long is the growing season in 56033?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 158 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.