Frost dates for 56231Danvers, MN
The average last spring frost in Danvers is May 4 and the average first fall frost is October 3, giving a typical growing season of about 151 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 4
- Average first fall frost
- Oct 3
- Growing season
- 151 days
Safer after May 17 (1-in-10 risk)
Possible by Sep 21 (1-in-10 risk)
Last frost typically in 182 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 30 · May 13 · May 26 | Sep 14 · Sep 26 · Oct 6 | 134 days | 100% |
| Frost / freeze (32°F) | Apr 22 · May 4 · May 17 | Sep 21 · Oct 3 · Oct 15 | 151 days | 100% |
| Hard freeze (28°F) | Apr 11 · Apr 26 · May 8 | Sep 28 · Oct 12 · Oct 26 | 171 days | 100% |
Planting calendar for Danvers
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 3 – Jun 9 |
| Tomatoes | Transplant outdoors | May 20 – Jun 13 |
| Peppers | Start seeds indoors | Apr 3 – May 4 |
| Peppers | Transplant outdoors | Jun 3 – Jul 4 |
| Eggplant | Start seeds indoors | Apr 20 – May 19 |
| Eggplant | Transplant outdoors | Jun 3 – Jul 4 |
| Cucumbers | Sow outdoors | Jun 3 – Jun 23 |
| Summer squash | Sow outdoors | May 20 – Jul 4 |
| Winter squash & pumpkins | Sow outdoors | Jun 3 – Jul 4 |
| Snap beans | Sow outdoors | May 20 – Jul 16 |
| Sweet corn | Sow outdoors | May 20 – Jun 13 |
| Watermelon & cantaloupe | Sow outdoors | Jun 3 – Jul 4 |
| Okra | Sow outdoors | May 27 – Jun 19 |
| Peas | Sow outdoors (spring) | Apr 3 – May 19 |
| Potatoes | Plant outdoors (spring) | Apr 3 – Jun 3 |
| Onions | Start seeds indoors (spring) | Feb 20 – Mar 19 |
| Onions | Transplant outdoors (spring) | Apr 20 – May 19 |
| Broccoli | Start seeds indoors (spring) | Mar 16 – Apr 19 |
| Broccoli | Transplant outdoors (spring) | Apr 20 – May 19 |
| Broccoli | Start seeds indoors (fall) | Jun 3 – Jun 13 |
| Broccoli | Transplant outdoors (fall) | Jul 3 – Jul 14 |
| Cabbage | Start seeds indoors (spring) | Mar 6 – Apr 3 |
| Cabbage | Transplant outdoors (spring) | Apr 3 – May 4 |
| Cabbage | Start seeds indoors (fall) | May 24 – Jun 23 |
| Cabbage | Transplant outdoors (fall) | Jun 23 – Jul 24 |
| Leaf lettuce | Sow outdoors (spring) | Apr 3 – Jun 19 |
| Leaf lettuce | Sow outdoors (fall) | Jun 23 – Aug 9 |
| Spinach | Sow outdoors (spring) | Mar 27 – May 10 |
| Spinach | Sow outdoors (fall) | Jul 10 – Aug 14 |
| Radishes | Sow outdoors (spring) | Apr 3 – May 24 |
| Radishes | Sow outdoors (fall) | Jun 23 – Aug 24 |
| Kale | Sow outdoors (spring) | Apr 20 – May 10 |
| Kale | Sow outdoors (fall) | Jun 16 – Jul 24 |
| Carrots | Sow outdoors (spring) | May 4 – Jun 19 |
| Carrots | Sow outdoors (fall) | May 24 – Jul 9 |
| Garlic | Plant outdoors (fall) | Sep 23 – Oct 24 |
Where these dates come from
ZIP code 56231 is matched to the NOAA station Benson, MN, 9.1 km away, at 1,030 ft elevation (0 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Benson, MN (used) | 1,030 ft | May 4 | Oct 3 |
| Milan 1Nw, MN | 1,020 ft | May 3 | Oct 2 |
| Artichoke Lake 1 E, MN | 1,098 ft | May 1 | Oct 8 |
| Morris W Cntrl Rsch & Outreach, MN | 1,140 ft | May 4 | Oct 1 |
Frost dates near Danvers
- Clontarf, MN 56226 · last May 4, first Oct 3
- Benson, MN 56215 · last May 4, first Oct 3
- Holloway, MN 56249 · last May 3, first Oct 2
- Milan, MN 56262 · last May 3, first Oct 2
- Appleton, MN 56208 · last May 3, first Oct 2
- Hancock, MN 56244 · last May 4, first Oct 1
- Murdock, MN 56271 · last May 4, first Oct 3
- Watson, MN 56295 · last May 3, first Oct 2
Frequently asked questions
- When is the last frost in Danvers, MN?
- For ZIP code 56231, the average last spring frost (32°F) is May 4, based on NOAA 1991-2020 climate normals for the Benson, MN weather station. There is a 1-in-10 chance of a frost after May 17.
- When is the first frost in Danvers, MN?
- The average first fall frost (32°F) is October 3. There is a 1-in-10 chance of frost by September 21, so tender plants are at risk from that point on.
- How long is the growing season in 56231?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 151 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.