Frost dates for 49327Grant, MI
The average last spring frost in Grant is May 14 and the average first fall frost is September 29, giving a typical growing season of about 135 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- May 14
- Average first fall frost
- Sep 29
- Growing season
- 135 days
Safer after May 31 (1-in-10 risk)
Possible by Sep 14 (1-in-10 risk)
Last frost typically in 192 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 9 · May 29 · Jun 13 | Aug 30 · Sep 18 · Oct 2 | 112 days | 100% |
| Frost / freeze (32°F) | Apr 29 · May 14 · May 31 | Sep 14 · Sep 29 · Oct 12 | 135 days | 100% |
| Hard freeze (28°F) | Apr 20 · May 2 · May 19 | Sep 24 · Oct 8 · Oct 23 | 158 days | 100% |
Planting calendar for Grant
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 13 – Jun 19 |
| Tomatoes | Transplant outdoors | May 30 – Jun 9 |
| Peppers | Start seeds indoors | Apr 13 – May 14 |
| Peppers | Transplant outdoors | Jun 13 – Jul 14 |
| Eggplant | Start seeds indoors | Apr 30 – May 29 |
| Eggplant | Transplant outdoors | Jun 13 – Jul 14 |
| Cucumbers | Sow outdoors | Jun 13 – Jun 19 |
| Summer squash | Sow outdoors | May 30 – Jul 14 |
| Winter squash & pumpkins | Sow outdoors | Jun 13 – Jul 14 |
| Snap beans | Sow outdoors | May 30 – Jul 12 |
| Sweet corn | Sow outdoors | May 30 – Jun 9 |
| Watermelon & cantaloupe | Sow outdoors | Jun 13 – Jul 14 |
| Okra | Sow outdoors | Jun 6 – Jun 29 |
| Peas | Sow outdoors (spring) | Apr 13 – May 29 |
| Potatoes | Plant outdoors (spring) | Apr 13 – Jun 13 |
| Onions | Start seeds indoors (spring) | Mar 2 – Mar 29 |
| Onions | Transplant outdoors (spring) | Apr 30 – May 29 |
| Broccoli | Start seeds indoors (spring) | Mar 26 – Apr 29 |
| Broccoli | Transplant outdoors (spring) | Apr 30 – May 29 |
| Broccoli | Start seeds indoors (fall) | May 30 – Jun 9 |
| Broccoli | Transplant outdoors (fall) | Jun 29 – Jul 10 |
| Cabbage | Start seeds indoors (spring) | Mar 16 – Apr 13 |
| Cabbage | Transplant outdoors (spring) | Apr 13 – May 14 |
| Cabbage | Start seeds indoors (fall) | May 20 – Jun 19 |
| Cabbage | Transplant outdoors (fall) | Jun 19 – Jul 20 |
| Leaf lettuce | Sow outdoors (spring) | Apr 13 – Jun 29 |
| Leaf lettuce | Sow outdoors (fall) | Jun 19 – Aug 5 |
| Spinach | Sow outdoors (spring) | Apr 6 – May 20 |
| Spinach | Sow outdoors (fall) | Jul 6 – Aug 10 |
| Radishes | Sow outdoors (spring) | Apr 13 – Jun 3 |
| Radishes | Sow outdoors (fall) | Jun 19 – Aug 20 |
| Kale | Sow outdoors (spring) | Apr 30 – May 20 |
| Kale | Sow outdoors (fall) | Jun 12 – Jul 20 |
| Carrots | Sow outdoors (spring) | May 14 – Jun 29 |
| Carrots | Sow outdoors (fall) | May 20 – Jul 5 |
| Garlic | Plant outdoors (fall) | Sep 19 – Oct 20 |
Where these dates come from
ZIP code 49327 is matched to the NOAA station Kent City 2 Sw, MI, 16.4 km away, at 840 ft elevation (20 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Kent City 2 Sw, MI (used) | 840 ft | May 14 | Sep 29 |
| Fremont 4 Wsw, MI | 800 ft | May 8 | Oct 11 |
| Hesperia 4 Wnw, MI | 780 ft | May 17 | Oct 1 |
| Muskegon Co Ap, MI | 625 ft | Apr 30 | Oct 19 |
Frost dates near Grant
- Bailey, MI 49303 · last May 14, first Sep 29
- Newaygo, MI 49337 · last May 17, first Oct 1
- Casnovia, MI 49318 · last May 14, first Sep 29
- Kent City, MI 49330 · last May 14, first Sep 29
- Fremont, MI 49412 · last May 17, first Oct 1
- Ravenna, MI 49451 · last Apr 30, first Oct 19
- Conklin, MI 49403 · last May 14, first Sep 29
- Sparta, MI 49345 · last May 14, first Sep 29
Frequently asked questions
- When is the last frost in Grant, MI?
- For ZIP code 49327, the average last spring frost (32°F) is May 14, based on NOAA 1991-2020 climate normals for the Kent City 2 Sw, MI weather station. There is a 1-in-10 chance of a frost after May 31.
- When is the first frost in Grant, MI?
- The average first fall frost (32°F) is September 29. There is a 1-in-10 chance of frost by September 14, so tender plants are at risk from that point on.
- How long is the growing season in 49327?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 135 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.