Frost dates for 56185Wilmont, MN
The average last spring frost in Wilmont is May 7 and the average first fall frost is September 29, giving a typical growing season of about 145 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 7
- Average first fall frost
- Sep 29
- Growing season
- 145 days
Safer after May 19 (1-in-10 risk)
Possible by Sep 15 (1-in-10 risk)
Last frost typically in 192 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 3 · May 15 · May 28 | Sep 6 · Sep 20 · Oct 3 | 127 days | 100% |
| Frost / freeze (32°F) | Apr 25 · May 7 · May 19 | Sep 15 · Sep 29 · Oct 13 | 145 days | 100% |
| Hard freeze (28°F) | Apr 13 · Apr 28 · May 10 | Sep 25 · Oct 8 · Oct 24 | 164 days | 100% |
Planting calendar for Wilmont
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 9 |
| 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 19 |
| Summer squash | Sow outdoors | May 23 – Jul 7 |
| Winter squash & pumpkins | Sow outdoors | Jun 6 – Jul 7 |
| Snap beans | Sow outdoors | May 23 – Jul 12 |
| Sweet corn | Sow outdoors | May 23 – Jun 9 |
| 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) | May 30 – Jun 9 |
| Broccoli | Transplant outdoors (fall) | Jun 29 – Jul 10 |
| Cabbage | Start seeds indoors (spring) | Mar 9 – Apr 6 |
| Cabbage | Transplant outdoors (spring) | Apr 6 – May 7 |
| Cabbage | Start seeds indoors (fall) | May 20 – Jun 19 |
| Cabbage | Transplant outdoors (fall) | Jun 19 – Jul 20 |
| Leaf lettuce | Sow outdoors (spring) | Apr 6 – Jun 22 |
| Leaf lettuce | Sow outdoors (fall) | Jun 19 – Aug 5 |
| Spinach | Sow outdoors (spring) | Mar 30 – May 13 |
| Spinach | Sow outdoors (fall) | Jul 6 – Aug 10 |
| Radishes | Sow outdoors (spring) | Apr 6 – May 27 |
| Radishes | Sow outdoors (fall) | Jun 19 – Aug 20 |
| Kale | Sow outdoors (spring) | Apr 23 – May 13 |
| Kale | Sow outdoors (fall) | Jun 12 – Jul 20 |
| Carrots | Sow outdoors (spring) | May 7 – Jun 22 |
| Carrots | Sow outdoors (fall) | May 20 – Jul 5 |
| Garlic | Plant outdoors (fall) | Sep 19 – Oct 20 |
Where these dates come from
ZIP code 56185 is matched to the NOAA station Lake Wilson, MN, 27.1 km away, at 1,653 ft elevation (79 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Lake Wilson, MN (used) | 1,653 ft | May 7 | Sep 29 |
| Worthington 2 Nne, MN | 1,570 ft | May 3 | Oct 4 |
| Sibley, IA | 1,529 ft | May 5 | Oct 3 |
| Rock Rapids, IA | 1,350 ft | May 1 | Oct 4 |
Frost dates near Wilmont
- Reading, MN 56165 · last May 3, first Oct 4
- Lismore, MN 56155 · last May 7, first Sep 29
- Iona, MN 56141 · last May 7, first Sep 29
- Leota, MN 56153 · last May 7, first Sep 29
- Rushmore, MN 56168 · last May 3, first Oct 4
- Chandler, MN 56122 · last May 7, first Sep 29
- Adrian, MN 56110 · last May 3, first Oct 4
- Fulda, MN 56131 · last May 3, first Oct 4
Frequently asked questions
- When is the last frost in Wilmont, MN?
- For ZIP code 56185, the average last spring frost (32°F) is May 7, based on NOAA 1991-2020 climate normals for the Lake Wilson, MN weather station. There is a 1-in-10 chance of a frost after May 19.
- When is the first frost in Wilmont, MN?
- The average first fall frost (32°F) is September 29. There is a 1-in-10 chance of frost by September 15, so tender plants are at risk from that point on.
- How long is the growing season in 56185?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 145 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.