Frost dates for 56171Sherburn, MN
The average last spring frost in Sherburn is April 28 and the average first fall frost is October 8, giving a typical growing season of about 162 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 28
- Average first fall frost
- Oct 8
- Growing season
- 162 days
Safer after May 9 (1-in-10 risk)
Possible by Sep 23 (1-in-10 risk)
Last frost typically in 183 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 24 · May 6 · May 18 | Sep 16 · Sep 28 · Oct 11 | 143 days | 100% |
| Frost / freeze (32°F) | Apr 13 · Apr 28 · May 9 | Sep 23 · Oct 8 · Oct 22 | 162 days | 100% |
| Hard freeze (28°F) | Apr 4 · Apr 18 · May 1 | Oct 5 · Oct 20 · Nov 1 | 184 days | 100% |
Planting calendar for Sherburn
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 28 – Jun 3 |
| Tomatoes | Transplant outdoors | May 14 – Jun 18 |
| Peppers | Start seeds indoors | Mar 28 – Apr 28 |
| Peppers | Transplant outdoors | May 28 – Jun 28 |
| Eggplant | Start seeds indoors | Apr 14 – May 13 |
| Eggplant | Transplant outdoors | May 28 – Jun 28 |
| Cucumbers | Sow outdoors | May 28 – Jun 28 |
| Summer squash | Sow outdoors | May 14 – Jun 28 |
| Winter squash & pumpkins | Sow outdoors | May 28 – Jun 28 |
| Snap beans | Sow outdoors | May 14 – Jul 21 |
| Sweet corn | Sow outdoors | May 14 – Jun 18 |
| Watermelon & cantaloupe | Sow outdoors | May 28 – Jun 28 |
| Okra | Sow outdoors | May 21 – Jun 13 |
| Peas | Sow outdoors (spring) | Mar 28 – May 13 |
| Potatoes | Plant outdoors (spring) | Mar 28 – May 28 |
| Onions | Start seeds indoors (spring) | Feb 14 – Mar 13 |
| Onions | Transplant outdoors (spring) | Apr 14 – May 13 |
| Broccoli | Start seeds indoors (spring) | Mar 10 – Apr 13 |
| Broccoli | Transplant outdoors (spring) | Apr 14 – May 13 |
| Broccoli | Start seeds indoors (fall) | Jun 8 – Jun 18 |
| Broccoli | Transplant outdoors (fall) | Jul 8 – Jul 19 |
| Cabbage | Start seeds indoors (spring) | Feb 28 – Mar 28 |
| Cabbage | Transplant outdoors (spring) | Mar 28 – Apr 28 |
| Cabbage | Start seeds indoors (fall) | May 29 – Jun 28 |
| Cabbage | Transplant outdoors (fall) | Jun 28 – Jul 29 |
| Leaf lettuce | Sow outdoors (spring) | Mar 28 – Jun 13 |
| Leaf lettuce | Sow outdoors (fall) | Jun 28 – Aug 14 |
| Spinach | Sow outdoors (spring) | Mar 21 – May 4 |
| Spinach | Sow outdoors (fall) | Jul 15 – Aug 19 |
| Radishes | Sow outdoors (spring) | Mar 28 – May 18 |
| Radishes | Sow outdoors (fall) | Jun 28 – Aug 29 |
| Kale | Sow outdoors (spring) | Apr 14 – May 4 |
| Kale | Sow outdoors (fall) | Jun 21 – Jul 29 |
| Carrots | Sow outdoors (spring) | Apr 28 – Jun 13 |
| Carrots | Sow outdoors (fall) | May 29 – Jul 14 |
| Garlic | Plant outdoors (fall) | Sep 28 – Oct 29 |
Where these dates come from
ZIP code 56171 is matched to the NOAA station Sherburn 3Wsw, MN, 5.1 km away, at 1,320 ft elevation (24 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Sherburn 3Wsw, MN (used) | 1,320 ft | Apr 28 | Oct 8 |
| Fairmont, MN | 1,187 ft | Apr 25 | Oct 14 |
| Estherville Muni Ap, IA | 1,317 ft | May 2 | Sep 30 |
| Estherville 4E, IA | 1,320 ft | May 2 | Oct 3 |
Frost dates near Sherburn
- Welcome, MN 56181 · last Apr 25, first Oct 14
- Dunnell, MN 56127 · last May 2, first Sep 30
- Trimont, MN 56176 · last Apr 25, first Oct 14
- Alpha, MN 56111 · last Apr 28, first Oct 11
- Ceylon, MN 56121 · last Apr 25, first Oct 14
- Jackson, MN 56143 · last May 2, first Oct 2
- Fairmont, MN 56031 · last Apr 25, first Oct 14
- Ormsby, MN 56162 · last Apr 30, first Oct 7
Frequently asked questions
- When is the last frost in Sherburn, MN?
- For ZIP code 56171, the average last spring frost (32°F) is April 28, based on NOAA 1991-2020 climate normals for the Sherburn 3Wsw, MN weather station. There is a 1-in-10 chance of a frost after May 9.
- When is the first frost in Sherburn, MN?
- The average first fall frost (32°F) is October 8. There is a 1-in-10 chance of frost by September 23, so tender plants are at risk from that point on.
- How long is the growing season in 56171?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 162 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.