Frost dates for 49259Munith, MI
The average last spring frost in Munith is April 30 and the average first fall frost is October 12, giving a typical growing season of about 163 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 30
- Average first fall frost
- Oct 12
- Growing season
- 163 days
Safer after May 17 (1-in-10 risk)
Possible by Sep 28 (1-in-10 risk)
Last frost typically in 179 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 26 · May 11 · May 27 | Sep 18 · Sep 30 · Oct 13 | 142 days | 100% |
| Frost / freeze (32°F) | Apr 18 · Apr 30 · May 17 | Sep 28 · Oct 12 · Oct 27 | 163 days | 100% |
| Hard freeze (28°F) | Apr 6 · Apr 20 · May 6 | Oct 10 · Oct 26 · Nov 9 | 187 days | 100% |
Planting calendar for Munith
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 30 – Jun 5 |
| Tomatoes | Transplant outdoors | May 16 – Jun 22 |
| Peppers | Start seeds indoors | Mar 30 – Apr 30 |
| Peppers | Transplant outdoors | May 30 – Jun 30 |
| Eggplant | Start seeds indoors | Apr 16 – May 15 |
| Eggplant | Transplant outdoors | May 30 – Jun 30 |
| Cucumbers | Sow outdoors | May 30 – Jul 2 |
| Summer squash | Sow outdoors | May 16 – Jun 30 |
| Winter squash & pumpkins | Sow outdoors | May 30 – Jun 30 |
| Snap beans | Sow outdoors | May 16 – Jul 25 |
| Sweet corn | Sow outdoors | May 16 – Jun 22 |
| Watermelon & cantaloupe | Sow outdoors | May 30 – Jun 30 |
| Okra | Sow outdoors | May 23 – Jun 15 |
| Peas | Sow outdoors (spring) | Mar 30 – May 15 |
| Potatoes | Plant outdoors (spring) | Mar 30 – May 30 |
| Onions | Start seeds indoors (spring) | Feb 16 – Mar 15 |
| Onions | Transplant outdoors (spring) | Apr 16 – May 15 |
| Broccoli | Start seeds indoors (spring) | Mar 12 – Apr 15 |
| Broccoli | Transplant outdoors (spring) | Apr 16 – May 15 |
| Broccoli | Start seeds indoors (fall) | Jun 12 – Jun 22 |
| Broccoli | Transplant outdoors (fall) | Jul 12 – Jul 23 |
| Cabbage | Start seeds indoors (spring) | Mar 2 – Mar 30 |
| Cabbage | Transplant outdoors (spring) | Mar 30 – Apr 30 |
| Cabbage | Start seeds indoors (fall) | Jun 2 – Jul 2 |
| Cabbage | Transplant outdoors (fall) | Jul 2 – Aug 2 |
| Leaf lettuce | Sow outdoors (spring) | Mar 30 – Jun 15 |
| Leaf lettuce | Sow outdoors (fall) | Jul 2 – Aug 18 |
| Spinach | Sow outdoors (spring) | Mar 23 – May 6 |
| Spinach | Sow outdoors (fall) | Jul 19 – Aug 23 |
| Radishes | Sow outdoors (spring) | Mar 30 – May 20 |
| Radishes | Sow outdoors (fall) | Jul 2 – Sep 2 |
| Kale | Sow outdoors (spring) | Apr 16 – May 6 |
| Kale | Sow outdoors (fall) | Jun 25 – Aug 2 |
| Carrots | Sow outdoors (spring) | Apr 30 – Jun 15 |
| Carrots | Sow outdoors (fall) | Jun 2 – Jul 18 |
| Garlic | Plant outdoors (fall) | Oct 2 – Nov 2 |
Where these dates come from
ZIP code 49259 is matched to the NOAA station Chelsea, MI, 19.9 km away, at 900 ft elevation (38 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Chelsea, MI (used) | 900 ft | Apr 30 | Oct 12 |
| Jackson Reynolds Fld, MI | 998 ft | May 1 | Oct 14 |
| Hell, MI | 890 ft | Apr 30 | Oct 14 |
| Manchester, MI | 965 ft | Apr 30 | Oct 14 |
Frost dates near Munith
- Pleasant Lake, MI 49272 · last May 1, first Oct 14
- Stockbridge, MI 49285 · last Apr 30, first Oct 12
- Grass Lake, MI 49240 · last Apr 30, first Oct 12
- Michigan Center, MI 49254 · last May 1, first Oct 14
- Jackson, MI 49201 · last May 1, first Oct 14
- Leslie, MI 49251 · last May 1, first Oct 14
- Rives Junction, MI 49277 · last May 1, first Oct 14
- Chelsea, MI 48118 · last Apr 30, first Oct 12
Frequently asked questions
- When is the last frost in Munith, MI?
- For ZIP code 49259, the average last spring frost (32°F) is April 30, based on NOAA 1991-2020 climate normals for the Chelsea, MI weather station. There is a 1-in-10 chance of a frost after May 17.
- When is the first frost in Munith, MI?
- The average first fall frost (32°F) is October 12. There is a 1-in-10 chance of frost by September 28, so tender plants are at risk from that point on.
- How long is the growing season in 49259?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 163 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.