Frost dates for 56650Kelliher, MN
The average last spring frost in Kelliher is May 24 and the average first fall frost is September 17, giving a typical growing season of about 115 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 24
- Average first fall frost
- Sep 17
- Growing season
- 115 days
Safer after Jun 6 (1-in-10 risk)
Possible by Sep 1 (1-in-10 risk)
Last frost typically in 209 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 23 · Jun 4 · Jun 24 | Aug 19 · Sep 6 · Sep 21 | 92 days | 100% |
| Frost / freeze (32°F) | May 9 · May 24 · Jun 6 | Sep 1 · Sep 17 · Oct 1 | 115 days | 100% |
| Hard freeze (28°F) | Apr 30 · May 13 · May 27 | Sep 10 · Sep 28 · Oct 13 | 137 days | 100% |
Planting calendar for Kelliher
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 23 – Jun 29 |
| Tomatoes | Transplant outdoors | Jun 9 – May 28 |
| Peppers | Start seeds indoors | Apr 23 – May 24 |
| Peppers | Transplant outdoors | Jun 23 – Jul 24 |
| Eggplant | Start seeds indoors | May 10 – Jun 8 |
| Eggplant | Transplant outdoors | Jun 23 – Jul 24 |
| Cucumbers | Sow outdoors | Jun 23 – Jun 7 |
| Summer squash | Sow outdoors | Jun 9 – Jul 24 |
| Winter squash & pumpkins | Sow outdoors | Jun 23 – Jul 24 |
| Snap beans | Sow outdoors | Jun 9 – Jun 30 |
| Sweet corn | Sow outdoors | Jun 9 – May 28 |
| Watermelon & cantaloupe | Sow outdoors | Jun 23 – Jul 24 |
| Okra | Sow outdoors | Jun 16 – Jul 9 |
| Peas | Sow outdoors (spring) | Apr 23 – Jun 8 |
| Potatoes | Plant outdoors (spring) | Apr 23 – Jun 23 |
| Onions | Start seeds indoors (spring) | Mar 12 – Apr 8 |
| Onions | Transplant outdoors (spring) | May 10 – Jun 8 |
| Broccoli | Start seeds indoors (spring) | Apr 5 – May 9 |
| Broccoli | Transplant outdoors (spring) | May 10 – Jun 8 |
| Broccoli | Start seeds indoors (fall) | May 18 – May 28 |
| Broccoli | Transplant outdoors (fall) | Jun 17 – Jun 28 |
| Cabbage | Start seeds indoors (spring) | Mar 26 – Apr 23 |
| Cabbage | Transplant outdoors (spring) | Apr 23 – May 24 |
| Cabbage | Start seeds indoors (fall) | May 8 – Jun 7 |
| Cabbage | Transplant outdoors (fall) | Jun 7 – Jul 8 |
| Leaf lettuce | Sow outdoors (spring) | Apr 23 – Jul 9 |
| Leaf lettuce | Sow outdoors (fall) | Jun 7 – Jul 24 |
| Spinach | Sow outdoors (spring) | Apr 16 – May 30 |
| Spinach | Sow outdoors (fall) | Jun 24 – Jul 29 |
| Radishes | Sow outdoors (spring) | Apr 23 – Jun 13 |
| Radishes | Sow outdoors (fall) | Jun 7 – Aug 8 |
| Kale | Sow outdoors (spring) | May 10 – May 30 |
| Kale | Sow outdoors (fall) | May 31 – Jul 8 |
| Carrots | Sow outdoors (spring) | May 24 – Jul 9 |
| Carrots | Sow outdoors (fall) | May 8 – Jun 23 |
| Garlic | Plant outdoors (fall) | Sep 7 – Oct 8 |
Where these dates come from
ZIP code 56650 is matched to the NOAA station Blackduck, MN, 28.5 km away, at 1,340 ft elevation (80 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Blackduck, MN (used) | 1,340 ft | May 24 | Sep 17 |
| Northome 3S, MN | 1,415 ft | May 16 | Sep 26 |
| Waskish 4Ne, MN | 1,191 ft | May 22 | Sep 17 |
| Red Lake Indian Agcy, MN | 1,216 ft | May 12 | Oct 4 |
Frost dates near Kelliher
- Blackduck, MN 56630 · last May 24, first Sep 17
- Hines, MN 56647 · last May 24, first Sep 17
- Northome, MN 56661 · last May 16, first Sep 26
- Waskish, MN 56685 · last May 22, first Sep 17
- Mizpah, MN 56660 · last May 16, first Sep 26
- Redby, MN 56670 · last May 12, first Oct 4
- Ponemah, MN 56666 · last May 12, first Oct 4
- Tenstrike, MN 56683 · last May 24, first Sep 17
Frequently asked questions
- When is the last frost in Kelliher, MN?
- For ZIP code 56650, the average last spring frost (32°F) is May 24, based on NOAA 1991-2020 climate normals for the Blackduck, MN weather station. There is a 1-in-10 chance of a frost after June 6.
- When is the first frost in Kelliher, MN?
- The average first fall frost (32°F) is September 17. There is a 1-in-10 chance of frost by September 1, so tender plants are at risk from that point on.
- How long is the growing season in 56650?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 115 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.