Frost dates for 62859Mc Leansboro, IL
The average last spring frost in Mc Leansboro is April 11 and the average first fall frost is October 21, giving a typical growing season of about 190 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 11
- Average first fall frost
- Oct 21
- Growing season
- 190 days
Safer after Apr 26 (1-in-10 risk)
Possible by Oct 6 (1-in-10 risk)
Last frost typically in 163 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 6 · Apr 22 · May 8 | Sep 28 · Oct 11 · Oct 23 | 170 days | 100% |
| Frost / freeze (32°F) | Mar 27 · Apr 11 · Apr 26 | Oct 6 · Oct 21 · Nov 1 | 190 days | 100% |
| Hard freeze (28°F) | Mar 16 · Apr 1 · Apr 17 | Oct 17 · Oct 30 · Nov 10 | 209 days | 100% |
Planting calendar for Mc Leansboro
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 11 – May 17 |
| Tomatoes | Transplant outdoors | Apr 27 – Jul 1 |
| Peppers | Start seeds indoors | Mar 11 – Apr 11 |
| Peppers | Transplant outdoors | May 11 – Jun 11 |
| Eggplant | Start seeds indoors | Mar 28 – Apr 26 |
| Eggplant | Transplant outdoors | May 11 – Jun 11 |
| Cucumbers | Sow outdoors | May 11 – Jul 11 |
| Summer squash | Sow outdoors | Apr 27 – Jun 11 |
| Winter squash & pumpkins | Sow outdoors | May 11 – Jun 11 |
| Snap beans | Sow outdoors | Apr 27 – Aug 3 |
| Sweet corn | Sow outdoors | Apr 27 – Jul 1 |
| Watermelon & cantaloupe | Sow outdoors | May 11 – Jun 11 |
| Okra | Sow outdoors | May 4 – May 27 |
| Peas | Sow outdoors (spring) | Mar 11 – Apr 26 |
| Potatoes | Plant outdoors (spring) | Mar 11 – May 11 |
| Onions | Start seeds indoors (spring) | Jan 28 – Feb 24 |
| Onions | Transplant outdoors (spring) | Mar 28 – Apr 26 |
| Broccoli | Start seeds indoors (spring) | Feb 21 – Mar 27 |
| Broccoli | Transplant outdoors (spring) | Mar 28 – Apr 26 |
| Broccoli | Start seeds indoors (fall) | Jun 21 – Jul 1 |
| Broccoli | Transplant outdoors (fall) | Jul 21 – Aug 1 |
| Cabbage | Start seeds indoors (spring) | Feb 11 – Mar 11 |
| Cabbage | Transplant outdoors (spring) | Mar 11 – Apr 11 |
| Cabbage | Start seeds indoors (fall) | Jun 11 – Jul 11 |
| Cabbage | Transplant outdoors (fall) | Jul 11 – Aug 11 |
| Leaf lettuce | Sow outdoors (spring) | Mar 11 – May 27 |
| Leaf lettuce | Sow outdoors (fall) | Jul 11 – Aug 27 |
| Spinach | Sow outdoors (spring) | Mar 4 – Apr 17 |
| Spinach | Sow outdoors (fall) | Jul 28 – Sep 1 |
| Radishes | Sow outdoors (spring) | Mar 11 – May 1 |
| Radishes | Sow outdoors (fall) | Jul 11 – Sep 11 |
| Kale | Sow outdoors (spring) | Mar 28 – Apr 17 |
| Kale | Sow outdoors (fall) | Jul 4 – Aug 11 |
| Carrots | Sow outdoors (spring) | Apr 11 – May 27 |
| Carrots | Sow outdoors (fall) | Jun 11 – Jul 27 |
| Garlic | Plant outdoors (fall) | Oct 11 – Nov 11 |
Where these dates come from
ZIP code 62859 is matched to the NOAA station Mcleansboro, IL, 1.6 km away, at 446 ft elevation (17 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Mcleansboro, IL (used) | 446 ft | Apr 11 | Oct 21 |
| Carmi 3, IL | 335 ft | Apr 15 | Oct 19 |
| Benton 2 N, IL | 445 ft | Apr 4 | Oct 28 |
| Fairfield Radio Wfiw, IL | 430 ft | Apr 7 | Oct 26 |
Frost dates near Mc Leansboro
- Dale, IL 62829 · last Apr 11, first Oct 21
- Dahlgren, IL 62828 · last Apr 11, first Oct 22
- Springerton, IL 62887 · last Apr 15, first Oct 19
- Broughton, IL 62817 · last Apr 7, first Oct 26
- Enfield, IL 62835 · last Apr 15, first Oct 19
- Macedonia, IL 62860 · last Apr 4, first Oct 28
- Norris City, IL 62869 · last Apr 15, first Oct 19
- Mill Shoals, IL 62862 · last Apr 7, first Oct 26
Frequently asked questions
- When is the last frost in Mc Leansboro, IL?
- For ZIP code 62859, the average last spring frost (32°F) is April 11, based on NOAA 1991-2020 climate normals for the Mcleansboro, IL weather station. There is a 1-in-10 chance of a frost after April 26.
- When is the first frost in Mc Leansboro, IL?
- The average first fall frost (32°F) is October 21. There is a 1-in-10 chance of frost by October 6, so tender plants are at risk from that point on.
- How long is the growing season in 62859?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 190 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.