Frost dates for 55749Holyoke, MN
The average last spring frost in Holyoke is June 1 and the average first fall frost is September 22, giving a typical growing season of about 113 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Jun 1
- Average first fall frost
- Sep 22
- Growing season
- 113 days
Safer after Jun 14 (1-in-10 risk)
Possible by Sep 8 (1-in-10 risk)
Last frost typically in 210 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 30 · Jun 12 · Jun 26 | Aug 30 · Sep 12 · Sep 26 | 91 days | 100% |
| Frost / freeze (32°F) | May 18 · Jun 1 · Jun 14 | Sep 8 · Sep 22 · Oct 5 | 113 days | 100% |
| Hard freeze (28°F) | May 2 · May 20 · Jun 3 | Sep 18 · Oct 2 · Oct 17 | 136 days | 100% |
Planting calendar for Holyoke
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 | May 1 – Jul 7 |
| Tomatoes | Transplant outdoors | Jun 17 – Jun 2 |
| Peppers | Start seeds indoors | May 1 – Jun 1 |
| Peppers | Transplant outdoors | Jul 1 – Aug 1 |
| Eggplant | Start seeds indoors | May 18 – Jun 16 |
| Eggplant | Transplant outdoors | Jul 1 – Aug 1 |
| Cucumbers | Sow outdoors | Jul 1 – Jun 12 |
| Summer squash | Sow outdoors | Jun 17 – Aug 1 |
| Winter squash & pumpkins | Sow outdoors | Jul 1 – Aug 1 |
| Snap beans | Sow outdoors | Jun 17 – Jul 5 |
| Sweet corn | Sow outdoors | Jun 17 – Jun 2 |
| Watermelon & cantaloupe | Sow outdoors | Jul 1 – Aug 1 |
| Okra | Sow outdoors | Jun 24 – Jul 17 |
| Peas | Sow outdoors (spring) | May 1 – Jun 16 |
| Potatoes | Plant outdoors (spring) | May 1 – Jul 1 |
| Onions | Start seeds indoors (spring) | Mar 20 – Apr 16 |
| Onions | Transplant outdoors (spring) | May 18 – Jun 16 |
| Broccoli | Start seeds indoors (spring) | Apr 13 – May 17 |
| Broccoli | Transplant outdoors (spring) | May 18 – Jun 16 |
| Broccoli | Start seeds indoors (fall) | May 23 – Jun 2 |
| Broccoli | Transplant outdoors (fall) | Jun 22 – Jul 3 |
| Cabbage | Start seeds indoors (spring) | Apr 3 – May 1 |
| Cabbage | Transplant outdoors (spring) | May 1 – Jun 1 |
| Cabbage | Start seeds indoors (fall) | May 13 – Jun 12 |
| Cabbage | Transplant outdoors (fall) | Jun 12 – Jul 13 |
| Leaf lettuce | Sow outdoors (spring) | May 1 – Jul 17 |
| Leaf lettuce | Sow outdoors (fall) | Jun 12 – Jul 29 |
| Spinach | Sow outdoors (spring) | Apr 24 – Jun 7 |
| Spinach | Sow outdoors (fall) | Jun 29 – Aug 3 |
| Radishes | Sow outdoors (spring) | May 1 – Jun 21 |
| Radishes | Sow outdoors (fall) | Jun 12 – Aug 13 |
| Kale | Sow outdoors (spring) | May 18 – Jun 7 |
| Kale | Sow outdoors (fall) | Jun 5 – Jul 13 |
| Carrots | Sow outdoors (spring) | Jun 1 – Jul 17 |
| Carrots | Sow outdoors (fall) | May 13 – Jun 28 |
| Garlic | Plant outdoors (fall) | Sep 12 – Oct 13 |
Where these dates come from
ZIP code 55749 is matched to the NOAA station Foxboro, WI, 7 km away, at 932 ft elevation (108 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Foxboro, WI (used) | 932 ft | Jun 1 | Sep 22 |
| Pattison Ranger Staion, WI | 1,100 ft | May 18 | Oct 3 |
| Bruno 7Ene, MN | 1,253 ft | May 18 | Sep 26 |
| Cloquet, MN | 1,265 ft | May 26 | Sep 23 |
Frost dates near Holyoke
- Wrenshall, MN 55797 · last Jun 1, first Sep 22
- Foxboro, WI 54836 · last May 18, first Oct 3
- Kerrick, MN 55756 · last May 18, first Sep 26
- Barnum, MN 55707 · last May 12, first Oct 2
- Carlton, MN 55718 · last May 26, first Sep 23
- Duluth, MN 55808 · last May 6, first Oct 9
- Esko, MN 55733 · last May 26, first Sep 23
- Bruno, MN 55712 · last May 18, first Sep 26
Frequently asked questions
- When is the last frost in Holyoke, MN?
- For ZIP code 55749, the average last spring frost (32°F) is June 1, based on NOAA 1991-2020 climate normals for the Foxboro, WI weather station. There is a 1-in-10 chance of a frost after June 14.
- When is the first frost in Holyoke, MN?
- The average first fall frost (32°F) is September 22. There is a 1-in-10 chance of frost by September 8, so tender plants are at risk from that point on.
- How long is the growing season in 55749?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 113 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.