Frost dates for 55606Hovland, MN
The average last spring frost in Hovland is May 20 and the average first fall frost is October 5, giving a typical growing season of about 137 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 20
- Average first fall frost
- Oct 5
- Growing season
- 137 days
Safer after Jun 6 (1-in-10 risk)
Possible by Sep 22 (1-in-10 risk)
Last frost typically in 205 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 19 · Jun 2 · Jun 18 | Sep 12 · Sep 26 · Oct 8 | 114 days | 100% |
| Frost / freeze (32°F) | May 3 · May 20 · Jun 6 | Sep 22 · Oct 5 · Oct 20 | 137 days | 100% |
| Hard freeze (28°F) | Apr 21 · May 4 · May 20 | Oct 1 · Oct 17 · Nov 1 | 163 days | 100% |
Planting calendar for Hovland
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 19 – Jun 25 |
| Tomatoes | Transplant outdoors | Jun 5 – Jun 15 |
| Peppers | Start seeds indoors | Apr 19 – May 20 |
| Peppers | Transplant outdoors | Jun 19 – Jul 20 |
| Eggplant | Start seeds indoors | May 6 – Jun 4 |
| Eggplant | Transplant outdoors | Jun 19 – Jul 20 |
| Cucumbers | Sow outdoors | Jun 19 – Jun 25 |
| Summer squash | Sow outdoors | Jun 5 – Jul 20 |
| Winter squash & pumpkins | Sow outdoors | Jun 19 – Jul 20 |
| Snap beans | Sow outdoors | Jun 5 – Jul 18 |
| Sweet corn | Sow outdoors | Jun 5 – Jun 15 |
| Watermelon & cantaloupe | Sow outdoors | Jun 19 – Jul 20 |
| Okra | Sow outdoors | Jun 12 – Jul 5 |
| Peas | Sow outdoors (spring) | Apr 19 – Jun 4 |
| Potatoes | Plant outdoors (spring) | Apr 19 – Jun 19 |
| Onions | Start seeds indoors (spring) | Mar 8 – Apr 4 |
| Onions | Transplant outdoors (spring) | May 6 – Jun 4 |
| Broccoli | Start seeds indoors (spring) | Apr 1 – May 5 |
| Broccoli | Transplant outdoors (spring) | May 6 – Jun 4 |
| Broccoli | Start seeds indoors (fall) | Jun 5 – Jun 15 |
| Broccoli | Transplant outdoors (fall) | Jul 5 – Jul 16 |
| Cabbage | Start seeds indoors (spring) | Mar 22 – Apr 19 |
| Cabbage | Transplant outdoors (spring) | Apr 19 – May 20 |
| Cabbage | Start seeds indoors (fall) | May 26 – Jun 25 |
| Cabbage | Transplant outdoors (fall) | Jun 25 – Jul 26 |
| Leaf lettuce | Sow outdoors (spring) | Apr 19 – Jul 5 |
| Leaf lettuce | Sow outdoors (fall) | Jun 25 – Aug 11 |
| Spinach | Sow outdoors (spring) | Apr 12 – May 26 |
| Spinach | Sow outdoors (fall) | Jul 12 – Aug 16 |
| Radishes | Sow outdoors (spring) | Apr 19 – Jun 9 |
| Radishes | Sow outdoors (fall) | Jun 25 – Aug 26 |
| Kale | Sow outdoors (spring) | May 6 – May 26 |
| Kale | Sow outdoors (fall) | Jun 18 – Jul 26 |
| Carrots | Sow outdoors (spring) | May 20 – Jul 5 |
| Carrots | Sow outdoors (fall) | May 26 – Jul 11 |
| Garlic | Plant outdoors (fall) | Sep 25 – Oct 26 |
Where these dates come from
ZIP code 55606 is matched to the NOAA station Grand Marais, MN, 22.9 km away, at 612 ft elevation (258 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Grand Marais, MN (used) | 612 ft | May 20 | Oct 5 |
| Grand Marais, MN | 610 ft | May 22 | Oct 9 |
| Grand Portage, MN | 730 ft | May 24 | Sep 29 |
| Lutsen 3Nne, MN | 1,300 ft | May 26 | Sep 27 |
Frost dates near Hovland
- Grand Marais, MN 55604 · last May 26, first Sep 27
- Grand Portage, MN 55605 · last May 24, first Sep 29
- Lutsen, MN 55612 · last May 26, first Sep 27
- Tofte, MN 55615 · last May 22, first Oct 9
- Schroeder, MN 55613 · last May 26, first Sep 27
- Finland, MN 55603 · last May 15, first Oct 1
- Silver Bay, MN 55614 · last May 15, first Oct 1
- La Pointe, WI 54850 · last May 20, first Oct 9
Frequently asked questions
- When is the last frost in Hovland, MN?
- For ZIP code 55606, the average last spring frost (32°F) is May 20, based on NOAA 1991-2020 climate normals for the Grand Marais, MN weather station. There is a 1-in-10 chance of a frost after June 6.
- When is the first frost in Hovland, MN?
- The average first fall frost (32°F) is October 5. There is a 1-in-10 chance of frost by September 22, so tender plants are at risk from that point on.
- How long is the growing season in 55606?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 137 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.