Frost dates for 62858Louisville, IL
The average last spring frost in Louisville is April 10 and the average first fall frost is October 23, giving a typical growing season of about 196 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 10
- Average first fall frost
- Oct 23
- Growing season
- 196 days
Safer after Apr 26 (1-in-10 risk)
Possible by Oct 7 (1-in-10 risk)
Last frost typically in 160 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 7 · Apr 23 · May 8 | Sep 24 · Oct 13 · Oct 26 | 172 days | 100% |
| Frost / freeze (32°F) | Mar 26 · Apr 10 · Apr 26 | Oct 7 · Oct 23 · Nov 5 | 196 days | 100% |
| Hard freeze (28°F) | Mar 13 · Mar 31 · Apr 16 | Oct 18 · Nov 2 · Nov 17 | 217 days | 100% |
Planting calendar for Louisville
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 10 – May 16 |
| Tomatoes | Transplant outdoors | Apr 26 – Jul 3 |
| Peppers | Start seeds indoors | Mar 10 – Apr 10 |
| Peppers | Transplant outdoors | May 10 – Jun 10 |
| Eggplant | Start seeds indoors | Mar 27 – Apr 25 |
| Eggplant | Transplant outdoors | May 10 – Jun 10 |
| Cucumbers | Sow outdoors | May 10 – Jul 13 |
| Summer squash | Sow outdoors | Apr 26 – Jun 10 |
| Winter squash & pumpkins | Sow outdoors | May 10 – Jun 10 |
| Snap beans | Sow outdoors | Apr 26 – Aug 5 |
| Sweet corn | Sow outdoors | Apr 26 – Jul 3 |
| Watermelon & cantaloupe | Sow outdoors | May 10 – Jun 10 |
| Okra | Sow outdoors | May 3 – May 26 |
| Peas | Sow outdoors (spring) | Mar 10 – Apr 25 |
| Potatoes | Plant outdoors (spring) | Mar 10 – May 10 |
| Onions | Start seeds indoors (spring) | Jan 27 – Feb 23 |
| Onions | Transplant outdoors (spring) | Mar 27 – Apr 25 |
| Broccoli | Start seeds indoors (spring) | Feb 20 – Mar 26 |
| Broccoli | Transplant outdoors (spring) | Mar 27 – Apr 25 |
| Broccoli | Start seeds indoors (fall) | Jun 23 – Jul 3 |
| Broccoli | Transplant outdoors (fall) | Jul 23 – Aug 3 |
| Cabbage | Start seeds indoors (spring) | Feb 10 – Mar 10 |
| Cabbage | Transplant outdoors (spring) | Mar 10 – Apr 10 |
| Cabbage | Start seeds indoors (fall) | Jun 13 – Jul 13 |
| Cabbage | Transplant outdoors (fall) | Jul 13 – Aug 13 |
| Leaf lettuce | Sow outdoors (spring) | Mar 10 – May 26 |
| Leaf lettuce | Sow outdoors (fall) | Jul 13 – Aug 29 |
| Spinach | Sow outdoors (spring) | Mar 3 – Apr 16 |
| Spinach | Sow outdoors (fall) | Jul 30 – Sep 3 |
| Radishes | Sow outdoors (spring) | Mar 10 – Apr 30 |
| Radishes | Sow outdoors (fall) | Jul 13 – Sep 13 |
| Kale | Sow outdoors (spring) | Mar 27 – Apr 16 |
| Kale | Sow outdoors (fall) | Jul 6 – Aug 13 |
| Carrots | Sow outdoors (spring) | Apr 10 – May 26 |
| Carrots | Sow outdoors (fall) | Jun 13 – Jul 29 |
| Garlic | Plant outdoors (fall) | Oct 13 – Nov 13 |
Where these dates come from
ZIP code 62858 is matched to the NOAA station Flora 5 Nw, IL, 9.1 km away, at 500 ft elevation (31 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Flora 5 Nw, IL (used) | 500 ft | Apr 10 | Oct 23 |
| Flora, IL | 481 ft | Apr 9 | Oct 24 |
| Newton 6 Sse, IL | 510 ft | Apr 13 | Oct 22 |
| Newton, IL | 531 ft | Apr 13 | Oct 22 |
Frost dates near Louisville
- Flora, IL 62839 · last Apr 9, first Oct 24
- Sailor Springs, IL 62879 · last Apr 9, first Oct 24
- Ingraham, IL 62434 · last Apr 9, first Oct 24
- Clay City, IL 62824 · last Apr 9, first Oct 24
- Xenia, IL 62899 · last Apr 10, first Oct 23
- Edgewood, IL 62426 · last Apr 10, first Oct 23
- Rinard, IL 62878 · last Apr 9, first Oct 24
- Farina, IL 62838 · last Apr 3, first Oct 24
Frequently asked questions
- When is the last frost in Louisville, IL?
- For ZIP code 62858, the average last spring frost (32°F) is April 10, based on NOAA 1991-2020 climate normals for the Flora 5 Nw, IL weather station. There is a 1-in-10 chance of a frost after April 26.
- When is the first frost in Louisville, IL?
- The average first fall frost (32°F) is October 23. There is a 1-in-10 chance of frost by October 7, so tender plants are at risk from that point on.
- How long is the growing season in 62858?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 196 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.