Frost dates for 55072Sandstone, MN
The average last spring frost in Sandstone is May 18 and the average first fall frost is September 26, giving a typical growing season of about 129 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 18
- Average first fall frost
- Sep 26
- Growing season
- 129 days
Safer after Jun 1 (1-in-10 risk)
Possible by Sep 12 (1-in-10 risk)
Last frost typically in 197 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 17 · May 31 · Jun 16 | Sep 1 · Sep 16 · Sep 29 | 107 days | 100% |
| Frost / freeze (32°F) | May 3 · May 18 · Jun 1 | Sep 12 · Sep 26 · Oct 9 | 129 days | 100% |
| Hard freeze (28°F) | Apr 22 · May 5 · May 20 | Sep 21 · Oct 5 · Oct 21 | 151 days | 100% |
Planting calendar for Sandstone
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 17 – Jun 23 |
| Tomatoes | Transplant outdoors | Jun 3 – Jun 6 |
| Peppers | Start seeds indoors | Apr 17 – May 18 |
| Peppers | Transplant outdoors | Jun 17 – Jul 18 |
| Eggplant | Start seeds indoors | May 4 – Jun 2 |
| Eggplant | Transplant outdoors | Jun 17 – Jul 18 |
| Cucumbers | Sow outdoors | Jun 17 – Jun 16 |
| Summer squash | Sow outdoors | Jun 3 – Jul 18 |
| Winter squash & pumpkins | Sow outdoors | Jun 17 – Jul 18 |
| Snap beans | Sow outdoors | Jun 3 – Jul 9 |
| Sweet corn | Sow outdoors | Jun 3 – Jun 6 |
| Watermelon & cantaloupe | Sow outdoors | Jun 17 – Jul 18 |
| Okra | Sow outdoors | Jun 10 – Jul 3 |
| Peas | Sow outdoors (spring) | Apr 17 – Jun 2 |
| Potatoes | Plant outdoors (spring) | Apr 17 – Jun 17 |
| Onions | Start seeds indoors (spring) | Mar 6 – Apr 2 |
| Onions | Transplant outdoors (spring) | May 4 – Jun 2 |
| Broccoli | Start seeds indoors (spring) | Mar 30 – May 3 |
| Broccoli | Transplant outdoors (spring) | May 4 – Jun 2 |
| Broccoli | Start seeds indoors (fall) | May 27 – Jun 6 |
| Broccoli | Transplant outdoors (fall) | Jun 26 – Jul 7 |
| Cabbage | Start seeds indoors (spring) | Mar 20 – Apr 17 |
| Cabbage | Transplant outdoors (spring) | Apr 17 – May 18 |
| Cabbage | Start seeds indoors (fall) | May 17 – Jun 16 |
| Cabbage | Transplant outdoors (fall) | Jun 16 – Jul 17 |
| Leaf lettuce | Sow outdoors (spring) | Apr 17 – Jul 3 |
| Leaf lettuce | Sow outdoors (fall) | Jun 16 – Aug 2 |
| Spinach | Sow outdoors (spring) | Apr 10 – May 24 |
| Spinach | Sow outdoors (fall) | Jul 3 – Aug 7 |
| Radishes | Sow outdoors (spring) | Apr 17 – Jun 7 |
| Radishes | Sow outdoors (fall) | Jun 16 – Aug 17 |
| Kale | Sow outdoors (spring) | May 4 – May 24 |
| Kale | Sow outdoors (fall) | Jun 9 – Jul 17 |
| Carrots | Sow outdoors (spring) | May 18 – Jul 3 |
| Carrots | Sow outdoors (fall) | May 17 – Jul 2 |
| Garlic | Plant outdoors (fall) | Sep 16 – Oct 17 |
Where these dates come from
ZIP code 55072 is matched to the NOAA station Bruno 7Ene, MN, 19.1 km away, at 1,253 ft elevation (141 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Bruno 7Ene, MN (used) | 1,253 ft | May 18 | Sep 26 |
| Danbury, WI | 950 ft | May 11 | Sep 30 |
| Sandstone 6 W, MN | 1,130 ft | May 13 | Sep 29 |
| Hinckley, MN | 1,035 ft | May 16 | Sep 24 |
Frost dates near Sandstone
- Askov, MN 55704 · last May 18, first Sep 26
- Bruno, MN 55712 · last May 18, first Sep 26
- Willow River, MN 55795 · last May 12, first Oct 2
- Hinckley, MN 55037 · last May 16, first Sep 24
- Kerrick, MN 55756 · last May 18, first Sep 26
- Finlayson, MN 55735 · last May 13, first Sep 29
- Danbury, WI 54830 · last May 11, first Sep 30
- Sturgeon Lake, MN 55783 · last May 12, first Oct 2
Frequently asked questions
- When is the last frost in Sandstone, MN?
- For ZIP code 55072, the average last spring frost (32°F) is May 18, based on NOAA 1991-2020 climate normals for the Bruno 7Ene, MN weather station. There is a 1-in-10 chance of a frost after June 1.
- When is the first frost in Sandstone, MN?
- The average first fall frost (32°F) is September 26. There is a 1-in-10 chance of frost by September 12, so tender plants are at risk from that point on.
- How long is the growing season in 55072?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 129 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.