Frost dates for 60151Maple Park, IL
The average last spring frost in Maple Park is April 24 and the average first fall frost is October 18, giving a typical growing season of about 177 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 24
- Average first fall frost
- Oct 18
- Growing season
- 177 days
Safer after May 10 (1-in-10 risk)
Possible by Oct 4 (1-in-10 risk)
Last frost typically in 176 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 20 · May 4 · May 22 | Sep 25 · Oct 7 · Oct 21 | 156 days | 100% |
| Frost / freeze (32°F) | Apr 9 · Apr 24 · May 10 | Oct 4 · Oct 18 · Oct 31 | 177 days | 100% |
| Hard freeze (28°F) | Mar 30 · Apr 13 · Apr 29 | Oct 14 · Oct 28 · Nov 12 | 198 days | 100% |
Planting calendar for Maple Park
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 24 – May 30 |
| Tomatoes | Transplant outdoors | May 10 – Jun 28 |
| Peppers | Start seeds indoors | Mar 24 – Apr 24 |
| Peppers | Transplant outdoors | May 24 – Jun 24 |
| Eggplant | Start seeds indoors | Apr 10 – May 9 |
| Eggplant | Transplant outdoors | May 24 – Jun 24 |
| Cucumbers | Sow outdoors | May 24 – Jul 8 |
| Summer squash | Sow outdoors | May 10 – Jun 24 |
| Winter squash & pumpkins | Sow outdoors | May 24 – Jun 24 |
| Snap beans | Sow outdoors | May 10 – Jul 31 |
| Sweet corn | Sow outdoors | May 10 – Jun 28 |
| Watermelon & cantaloupe | Sow outdoors | May 24 – Jun 24 |
| Okra | Sow outdoors | May 17 – Jun 9 |
| Peas | Sow outdoors (spring) | Mar 24 – May 9 |
| Potatoes | Plant outdoors (spring) | Mar 24 – May 24 |
| Onions | Start seeds indoors (spring) | Feb 10 – Mar 9 |
| Onions | Transplant outdoors (spring) | Apr 10 – May 9 |
| Broccoli | Start seeds indoors (spring) | Mar 6 – Apr 9 |
| Broccoli | Transplant outdoors (spring) | Apr 10 – May 9 |
| Broccoli | Start seeds indoors (fall) | Jun 18 – Jun 28 |
| Broccoli | Transplant outdoors (fall) | Jul 18 – Jul 29 |
| Cabbage | Start seeds indoors (spring) | Feb 24 – Mar 24 |
| Cabbage | Transplant outdoors (spring) | Mar 24 – Apr 24 |
| Cabbage | Start seeds indoors (fall) | Jun 8 – Jul 8 |
| Cabbage | Transplant outdoors (fall) | Jul 8 – Aug 8 |
| Leaf lettuce | Sow outdoors (spring) | Mar 24 – Jun 9 |
| Leaf lettuce | Sow outdoors (fall) | Jul 8 – Aug 24 |
| Spinach | Sow outdoors (spring) | Mar 17 – Apr 30 |
| Spinach | Sow outdoors (fall) | Jul 25 – Aug 29 |
| Radishes | Sow outdoors (spring) | Mar 24 – May 14 |
| Radishes | Sow outdoors (fall) | Jul 8 – Sep 8 |
| Kale | Sow outdoors (spring) | Apr 10 – Apr 30 |
| Kale | Sow outdoors (fall) | Jul 1 – Aug 8 |
| Carrots | Sow outdoors (spring) | Apr 24 – Jun 9 |
| Carrots | Sow outdoors (fall) | Jun 8 – Jul 24 |
| Garlic | Plant outdoors (fall) | Oct 8 – Nov 8 |
Where these dates come from
ZIP code 60151 is matched to the NOAA station De Kalb, IL, 14.6 km away, at 873 ft elevation (23 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| De Kalb, IL (used) | 873 ft | Apr 24 | Oct 18 |
| Chicago Aurora Muni Ap, IL | 710 ft | Apr 28 | Oct 13 |
| Shabbona 5 Nne, IL | 861 ft | Apr 28 | Oct 10 |
| Aurora, IL | 660 ft | Apr 19 | Oct 23 |
Frost dates near Maple Park
- Cortland, IL 60112 · last Apr 24, first Oct 18
- Sycamore, IL 60178 · last Apr 24, first Oct 18
- Kaneville, IL 60144 · last Apr 28, first Oct 13
- Elburn, IL 60119 · last Apr 28, first Oct 13
- Dekalb, IL 60115 · last Apr 24, first Oct 18
- Burlington, IL 60109 · last Apr 24, first Oct 18
- Lafox, IL 60147 · last Apr 25, first Oct 19
- Wasco, IL 60183 · last Apr 25, first Oct 19
Frequently asked questions
- When is the last frost in Maple Park, IL?
- For ZIP code 60151, the average last spring frost (32°F) is April 24, based on NOAA 1991-2020 climate normals for the De Kalb, IL weather station. There is a 1-in-10 chance of a frost after May 10.
- When is the first frost in Maple Park, IL?
- The average first fall frost (32°F) is October 18. There is a 1-in-10 chance of frost by October 4, so tender plants are at risk from that point on.
- How long is the growing season in 60151?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 177 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.